Communication method and communication device

Abstract

The present application provides a communication method and a communication device for improving system performance due to the relatively low peak-to-average power ratio (PAPR) of a long training field (LTF) included in a TB PPDU transmitted based on a distributed resource unit (DRU), as well as improving transmission efficiency in a distributed resource unit (DRU) transmission mode. In the method, a STA receives a trigger frame, the trigger frame includes DRU indication information, and the DRU indication information indicates a DRU used by the STA to transmit the TB PPDU. The STA transmits the TB PPDU on the DRU, and the TB PPDU includes a long training field (LTF). The present application is applied to a wireless local area network system supporting a next-generation Wi-Fi protocol of IEEE 802.11ax, for example, an 802.11 family protocol, such as 802.11be or EHT.

Description

[Technical Field]

[0001] The present invention relates to the field of wireless communication technology, and in particular to a communication method and a communication device. 333 [Background technology]

[0002] This application claims priority to Chinese Patent Application No. 202111343099.1, entitled "Communication Method and Communication Apparatus," filed with the State Intellectual Property Office of China on November 12, 2021, which is incorporated herein by reference in its entirety.

[0003] Recently, the US Federal Communications Commission issued regulations for the 6 GHz spectrum, which define a low power indoor (LPI) communication mode, specifying maximum power and maximum Power The standard strictly limits the spectral density. For a station (STA), the maximum power for transmission is limited to 24 dBm, and the maximum power spectral density is limited to -1 dBm / MHz. In other words, the transmission power of a device is limited by both the maximum power and the maximum power spectral density. That is, the transmission power cannot exceed the maximum power value, and the power spectral density for 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 allowable power for transmission is usually more limited by the power spectral density. For a station, when the bandwidth is 320 MHz, the transmission power of the station reaches the limit of the specified maximum power. When the bandwidth is less than 320 MHz, due to the limit of the maximum power spectral density, the station can only transmit at a lower power (herein, this means a power lower than the specified maximum power).

[0004] Europe has also recently released regulations for the 6 GHz band. For LPI communication mode, the maximum power for transmission is limited to 23 dBm, and the maximum power spectral density is limited to 10 dBm / MHz. When the bandwidth does not exceed 20 MHz, the transmission power of an access point (AP) / STA is mainly limited by the power spectral density. When the bandwidth exceeds 20 MHz, the transmission power of an AP / STA is mainly limited by the maximum power.

[0005] Therefore, how to increase the transmission power of the STA to obtain higher gain without increasing the power spectral density has become an urgent problem to be solved. Summary of the Invention

[0006] The present application not only improves transmission efficiency in a distributed resource unit (DRU) transmission mode, but also improves the peak-to-average long training field (LTF) included in a trigger-based physical layer protocol data unit (TB PPDU) transmitted based on the DRU. Power The present invention provides a communication method and apparatus for improving system performance due to a relatively low peak to average power ratio (PAPR).

[0007] A first aspect of the present application provides a communication method applied to WLAN communication. The method is executed by a station (STA), or by some components (e.g., a processor, a chip, or a chip system) within the STA. In the first aspect and possible implementations of the first aspect, an example in which the method is executed by the STA is used for explanation. In the method, the STA receives a trigger frame, the trigger frame includes DRU indication information, and the DRU indication information indicates a DRU to be used by the STA to transmit a TB PPDU. The STA transmits the TB PPDU on the DRU, and the TB PPDU includes an LTF.

[0008] Based on the above technical solution, after the STA receives the trigger frame containing the DRU indication information, the STA transmits the TB PPDU on the DRU indicated by the DRU indication information, and the TB PPDU contains the LTF. Resource Units Compared with the resource unit (RU) transmission mode, the transmission efficiency can be improved at the same power spectral density because the tones included in the DRU are discrete. In addition, the LTF included in the TB PPDU has a relatively low PAPR, which can improve system performance.

[0009] It should be noted that the DRU indication information indicating the DRU to be used by the STA to transmit the TB PPDU may be expressed as the DRU indication information indicating the DRU assigned to the STA, or the DRU indication information may be expressed as indicating the DRU assigned to the STA by the AP, which DRU is to be used to transport the TB PPDU.

[0010] A second aspect of the present application provides a communication method applied to WLAN communication. The method is executed by an access point (AP), or by some components (e.g., a processor, a chip, or a chip system) within the AP. In the second aspect and possible implementations of the second aspect, an example in which the method is executed by the AP is used for explanation. In the method, the AP transmits a trigger frame, the trigger frame includes DRU indication information, and the DRU indication information indicates a DRU to be used by a STA to transmit a TB PPDU. The AP transmits a trigger-based physical layer protocol data unit (PPU) on the DRU. ( TB PPDU ) TB PPDU is received, and the TB PPDU is ( LTF ) Includes:

[0011] Based on the above technical solution, after the AP sends a trigger frame containing DRU indication information, the AP receives a TB PPDU on the DRU indicated by the DRU indication information, and the TB PPDU contains an LTF. Resource Units Compared with the resource unit (RU) transmission mode, the transmission efficiency can be improved at the same power spectral density compared with the continuous RU mode because the tones included in the DRU are discrete. In addition, the LTF included in the TB PPDU has a relatively low PAPR, which can improve system performance.

[0012] A third aspect of the present application provides a communication device applied to WLAN communication. The device is an STA or some components (e.g., a processor, a chip, or a chip system) in the STA. A receiving unit in the device is configured to receive a trigger frame, the trigger frame including DRU indication information, and the DRU indication information indicates a DRU used by the STA to transmit a TB PPDU. A transmitting unit in the device is configured to transmit a trigger-based physical layer protocol data unit (TB PPDU) on the DRU, the TB PPDU including a long training field (LTF).

[0013] Based on the above technical solution, after the receiving unit receives the trigger frame containing the DRU indication information, the transmitting unit transmits the TB PPDU on the DRU indicated by the DRU indication information, and the TB PPDU contains the LTF. Resource Units Compared with the resource unit (RU) transmission mode, the transmission efficiency can be improved at the same power spectral density compared with the continuous RU mode because the tones included in the DRU are discrete. In addition, the LTF included in the TB PPDU has a relatively low PAPR, which can improve system performance.

[0014] A fourth aspect of the present application provides a communication device applied to WLAN communication. The device is an AP or some components (e.g., a processor, a chip, or a chip system) in the AP. A transmitting unit in the device is configured to transmit a trigger frame, the trigger frame including DRU indication information, and the DRU indication information indicates a DRU used by a STA to transmit a TB PPDU. A receiving unit in the device is configured to receive a trigger-based physical layer protocol data unit (TB PPDU) on the DRU, the TB PPDU including a long training field (LTF).

[0015] Based on the above technical solution, after the transmitting unit sends a trigger frame containing DRU indication information, the receiving unit receives a TB PPDU on the DRU indicated by the DRU indication information, and the TB PPDU contains an LTF. Resource Units Compared with the resource unit (RU) transmission mode, the transmission efficiency can be improved at the same power spectral density compared with the continuous RU mode because the tones included in the DRU are discrete. In addition, the LTF included in the TB PPDU has a relatively low PAPR, which can improve system performance.

[0016] In one possible implementation of the first to fourth aspects, the bandwidth occupied by the DRU is 20 megahertz (MHz), 40 MHz, 80 MHz, 160 MHz, or 320 MHz, and the LTF included in the TB PPDU is determined based on the bandwidth occupied by the DRU.

[0017] Optionally, the bandwidth occupied by the DRU is indicated by using an uplink bandwidth subfield and / or an uplink bandwidth extension subfield included in the trigger frame.

[0018] Optionally, the STAs and APs may pre-configure (or pre-define in a standard or pre-store) LTFs corresponding to different bandwidths.

[0019] Based on the above technical solutions, the tone plans for DRUs may be different in different channel bandwidths. That is, the number of tones included in each DRU and the position of the tones may be different. The PAPR of an LTF is associated with the index of the tone carrying the LTF and the sequence value of the LTF. In the process of a STA generating and transmitting a TB PPDU, the STA may determine an LTF with a relatively low PAPR within the bandwidth based on the bandwidth occupied by the DRU, thereby enabling the STA to obtain the benefit of a relatively low PAPR in various bandwidth communication scenarios and improve system performance.

[0020] In one possible implementation of the first to fourth aspects, the bandwidth occupied by the DRU includes k distributed resource units, each of which includes x data tones, and the absolute value of the index difference between every two data tones among y data tones among the x data tones is greater than or equal to 2, where k, x, and y are all positive integers and y≦x.

[0021] The indices of the y data tones in different distributed resource units in the k distributed resource units form an overall conversion relationship.

[0022] Optionally, if y data tones in different distributed resource units in the k distributed resource units carry the same LTF sequence, then the peak-to-average power ratio of y data tones in different distributed resource units in the k distributed resource units ( PAPR ) is the same.

[0023] Optionally, each of the k distributed resource units further includes z pilot tones, and the number of tones included in each of the k distributed resource units is the sum of x and z.

[0024] Based on the above technical solution, among the k distributed resource units included in the bandwidth occupied by the DRU, each distributed resource unit includes x data tones. The absolute value of the index difference between every two data tones among y data tones among the x data tones is greater than or equal to 2, so that there is a large interval between the tones included in each of the k distributed resource units, and sufficient discretization of the tones included in the DRU can be implemented. Therefore, at the same power spectral density, the maximum power amplification factor can be implemented compared to a continuous RU, thereby improving transmission efficiency.

[0025] In addition, the indices of the y data tones in different distributed resource units in the k distributed resource units form an overall conversion relationship. Therefore, if the y data tones in different distributed resource units in the k distributed resource units carry the same LTF sequence, the peak-to-average power ratios (PAPRs) of the y data tones in different distributed resource units in the k distributed resource units are the same. Therefore, in the process of configuring an LTF corresponding to the bandwidth occupied by the DRU, a sequence set including multiple LTF base sequences with relatively low PAPR characteristics can be determined for the y data tones included in a distributed resource unit in the k distributed resource units, and the LTF corresponding to the y data tones included in another distributed resource unit in the k distributed resource units is determined based on the sequence set, so as to simplify the LTF configuration process.

[0026] In one possible implementation of the first to fourth aspects, the bandwidth occupied by the DRU is 20 MHz; If the value of k is 9, then the value of x is 24 and the value of y is 24, or If the value of k is 4, then the value of x is 48 and the value of y is 48, or If the value of k is 2, the value of x is 102 and the value of y is 96.

[0027] Based on the above technical solution, if the bandwidth occupied by the DRU is 20 MHz, the bandwidth may include 256 tones with a tone spacing of 78.125 kilohertz (kHz). If a 26-tone DRU is used as the minimum DRU, the 256 tones may be divided into nine 26-tone DRUs (i.e., the value of k is 9), each of which includes 26 tones. In addition, each 26-tone DRU includes 24 data tones, and the spacing between any two of the 24 tones is 2 or more, improving the discreteness of the tones.

[0028] Optionally, each 26-tone DRU further includes two pilot tones.

[0029] Similarly, if the bandwidth occupied by the DRU is 20 MHz, a 52-tone DRU (i.e., if the value of k is 4, the value of x is 48 and the value of y is 48) and a 106-tone DRU (i.e., if the value of k is 2, the value of x is 102 and the value of y is 96) may be further included.

[0030] Optionally, each 52-tone DRU further includes four pilot tones, and each 106-tone DRU further includes four pilot tones.

[0031] In one possible implementation of any one of the first to fourth aspects, the bandwidth occupied by the DRU is 20 MHz. The LTF corresponding to the 20 MHz bandwidth contains 256 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are as follows: {0 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 -1 -1 1 1 1 -1 -1 1 1 0 0 0 0 0} is.

[0032] In one possible implementation of the first to fourth aspects, the bandwidth occupied by the DRU is 40 MHz; If the value of k is 18, then the value of x is 24 and the value of y is 24, or If the value of k is 8, then the value of x is 48 and the value of y is 48, or If the value of k is 4, the value of x is 102 and the value of y is 96.

[0033] Based on the above technical solution, if the bandwidth occupied by the DRU is 40 MHz, the bandwidth may include 512 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the minimum DRU, the 256 tones may be divided into 18 (i.e., the value of k is 18) 26-tone DRUs (i.e., each DRU includes 26 tones). In addition, each 26-tone DRU includes 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0034] Optionally, each 26-tone DRU further includes two pilot tones.

[0035] Similarly, if the bandwidth occupied by the DRU is 40 MHz, a 52-tone DRU (i.e., if the value of k is 8, the value of x is 48 and the value of y is 48) and a 106-tone DRU (i.e., if the value of k is 4, the value of x is 102 and the value of y is 96) may be further included.

[0036] Optionally, each 52-tone DRU further includes four pilot tones, and each 106-tone DRU further includes four pilot tones.

[0037] In one possible implementation of any one of the first to fourth aspects, the bandwidth occupied by the DRU is 40 MHz. The LTF corresponding to the 40 MHz bandwidth contains 512 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are as follows: {0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 1 1 1 0 0 0 0 0 -1 -1 -1 1 -1 1 1 1 0 0 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0} is.

[0038] In one possible implementation of the first to fourth aspects, the bandwidth occupied by the DRU is 80 MHz; If the value of k is 36, then the value of x is 24 and the value of y is 24, or If the value of k is 16, then the value of x is 48 and the value of y is 48, or If k is 8, then x is 102 and y is 96, or If the value of k is 4, the value of x is 234 and the value of y is 192.

[0039] Based on the above technical solution, if the bandwidth occupied by the DRU is 80 MHz, the bandwidth can contain 1,024 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the minimum DRU, 1024 The tones may be divided into 36 (i.e., the value of k is 36) 26-tone DRUs (i.e., each DRU contains 26 tones). In addition, each 26-tone DRU contains 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0040] Optionally, each 26-tone DRU further includes two pilot tones.

[0041] Similarly, if the bandwidth occupied by the DRU is 80 MHz, a 52-tone DRU (i.e., if k is 16, x is 48 and y is 48), a 106-tone DRU (i.e., if k is 8, x is 102 and y is 96), and a 242-tone DRU (i.e., if k is 4, x is 234 and y is 192) may be further included.

[0042] Optionally, each 52-tone DRU further includes four pilot tones, each 106-tone DRU further includes four pilot tones, and each 242-tone DRU further includes eight pilot tones.

[0043] In one possible implementation of any one of the first to fourth aspects, the bandwidth occupied by the DRU is 80 MHz. The LTF corresponding to the 80 MHz bandwidth contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are as follows: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 ... 0 0 0 0 0 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 0 0 0 0 0 -1 -1 -1 -1 1 -1 -1 1 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 1 1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 0 0 0 1 -1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 -1 -1 0 0 -1 -1 -1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 --1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 1 -1 1 1 1 - ... 0 0 0 0 0} is.

[0044] In one possible implementation of the first to fourth aspects, the bandwidth occupied by the DRU is 160 MHz; If the value of k is 72, then the value of x is 24 and the value of y is 24, or If the value of k is 32, then the value of x is 48 and the value of y is 48, or If k is 16, then x is 102 and y is 96, or If k is 8, then x is 234 and y is 192, or If the value of k is 4, the value of x is 468 and the value of y is 384.

[0045] Based on the above technical solution, if the bandwidth occupied by the DRU is 160 MHz, the bandwidth may include 2,048 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the minimum DRU, the 2,048 tones may be divided into 72 (i.e., the value of k is 72) 26-tone DRUs (i.e., each DRU includes 26 tones). In addition, each 26-tone DRU includes 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0046] Optionally, each 26-tone DRU further includes two pilot tones.

[0047] Similarly, if the bandwidth occupied by the DRU is 160 MHz, a 52-tone DRU (i.e., when k is 32, x is 48 and y is 48), a 106-tone DRU (i.e., when k is 16, x is 102 and y is 96), a 242-tone DRU (i.e., when k is 8, x is 234 and y is 192), and a 484-tone DRU (i.e., when k is 4, x is 468 and y is 384) may be further included.

[0048] Optionally, each 52-tone DRU further includes 4 pilot tones, each 106-tone DRU further includes 4 pilot tones, each 242-tone DRU further includes 8 pilot tones, and each 484-tone DRU further includes 16 pilot tones.

[0049] In a possible implementation of any one of the first to fourth aspects, the bandwidth occupied by the DRU is 160 MHz.

[0050] For the 80 MHz portion with lower frequencies within 160 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 1 1 -1 1 0 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 0 0 0 0 0 -1 1 1 -1 1 1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 1 -1 0 0 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 1 -1 -1 1 1 1 -1 -1 1 1 1 -1 -1 1 1 1 -1 -1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 0 0 0 0 0 -1 -1 -1 1 ... 0 0 0 0 0} is.

[0051] For the 80 MHz portion with higher frequencies within 160 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 0 0 0 0 0 1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 0 0 1 1 -1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 0 0 0 0 0 -1 -1 -1 1 -1 1 1 -1 0 0 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 0 0 0 0 0 0 0 -1 -1 1 -1 1 -1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 0 0 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 ... -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 ...0 0 0 0 0 0 0 0 0 0 0} is.

[0052] In one possible implementation of the first to fourth aspects, the bandwidth occupied by the DRU is 320 MHz; If the value of k is 144, then the value of x is 24 and the value of y is 24, or If k is 64, then x is 48 and y is 48, or If k is 32, then x is 102 and y is 96, or If k is 16, then x is 234 and y is 192, or If k is 8, then x is 468 and y is 384, or If the value of k is 4, the value of x is 980 and the value of y is 768.

[0053] Based on the above technical solution, if the bandwidth occupied by the DRU is 320 MHz, the bandwidth may include 4,096 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the minimum DRU, the 4,096 tones may be divided into 144 (i.e., the value of k is 144) 26-tone DRUs (i.e., each DRU includes 26 tones). In addition, each 26-tone DRU includes 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0054] Optionally, each 26-tone DRU further includes two pilot tones.

[0055] Similarly, if the bandwidth occupied by the DRU is 320 MHz, then there are a 52-tone DRU (i.e., when k is 64, x is 48 and y is 48), a 106-tone DRU (i.e., when k is 32, x is 102 and y is 96), a 242-tone DRU (i.e., when k is 16, x is 234 and y is 192), a 484-tone DRU (i.e., when k is 8, x is 468 and y is 384), and a 996-tone DRU (i.e., when k is 8, x is 980 and y is 768). )but It may further include:

[0056] Optionally, each 52-tone DRU further includes four pilot tones, each 106-tone DRU further includes four pilot tones, each 242-tone DRU further includes eight pilot tones, each 484-tone DRU further includes 16 pilot tones, and each 996-tone DRU further includes 16 pilot tones.

[0057] In a possible implementation of any one of the first to fourth aspects, the bandwidth occupied by the DRU is 320 MHz.

[0058] For an 80 MHz portion with a lowest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 1 -1 1 -1 1 -1 1 -1 1 -1 1 1 -1 1 -1 1 -1 1 1 1 1 -1 1 -1 1 -1 1 1 1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 ... 1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 ... -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0} is.

[0059] For the 80 MHz portion with the second lowest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 0 0 0 0 0 -1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0} is.

[0060] For the 80 MHz portion with the second highest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 -1 1 -1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 ... -1 -1 -1 1 1 1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 1 1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 -1 1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 0 0 0 0 0 0 0 0 0 0 0} is.

[0061] For an 80 MHz portion with a highest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are: {0 0 0 0 0 0 0 0 0 0 0 -1 1 1 1 1 -1 1 1 1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 1 1 1 - ... -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 -1 1 -1 1 -1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 1 1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 ...0 0 0 0 0 0 0 0 0 0 0} is.

[0062] In a possible implementation of any one of the first to fourth aspects, the DRU indication information includes at least one of an RU allocation subfield, an uplink bandwidth subfield, an uplink bandwidth extension subfield, or a primary / secondary 160 subfield.

[0063] In a possible implementation of any one of the first to fourth aspects, in the LTF included in the TB PPDU, the value of the x data tones in each of the k distributed resource units is 1 or −1.

[0064] The LTF included in the TB PPDU includes a portion whose value is 0 and a portion whose value is not 0 (ie, 1 or −1).

[0065] Optionally, if a tone is included outside any distributed resource unit or is not allocated to any distributed resource unit, the value of the LTF corresponding to the tone is 0. For example, in the above-mentioned LTF sequence, a tone occupied by an LTF with a value of 0 is a tone that does not belong to any distributed resource unit.

[0066] Optionally, if a tone is included in or allocated to any distributed resource unit, the value of the LTF corresponding to the tone is not 0 (i.e., 1 or −1). For example, in the above-mentioned LTF sequence, a tone occupied by an LTF with a value not 0 (i.e., 1 or −1) is a tone that belongs to one or more distributed resource units.

[0067] A fifth aspect of an embodiment of the present application provides a communications device including at least one processor, coupled to a memory configured to store a program or instructions, and configured to execute the program or instructions, such that the device implements a method according to the first aspect or any one of the possible implementations of the first aspect, or the device implements a method according to the second aspect or any one of the possible implementations of the second aspect.

[0068] A sixth aspect of an embodiment of the present application provides a computer-readable storage medium storing one or more computer-executable instructions. Executable Instructions When executed by a processor, the processor performs a method according to the first aspect or any one of the possible implementations of the first aspect, or the processor performs a method according to the second aspect or any one of the possible implementations of the second aspect.

[0069] A seventh aspect of an embodiment of the present application provides a computer program product (also referred to as a computer program) storing one or more computer programs, which, when executed by a processor, causes the processor to perform a method according to the first aspect or any one of the possible implementations of the first aspect, or causes the processor to perform a method according to the second aspect or any one of the possible implementations of the second aspect.

[0070] An eighth aspect of an embodiment of the present application provides a chip system, the chip system including at least one processor configured to support a communication device in implementing functions of the first aspect or any one of possible implementations of the first aspect, or configured to support a communication device in implementing functions of the second aspect or any one of possible implementations of the second aspect.

[0071] In a possible design, the chip system further includes a memory configured to store program instructions and data required by the communication device. The chip system may include the chip, or may include the chip and other discrete components. Optionally, the chip system further includes an interface circuit, which provides the program instructions and / or data to the at least one processor.

[0072] A ninth aspect of an embodiment of the present application provides a communication system, the communication system including the communication device according to the third aspect and the communication device according to the fourth aspect, and / or the communication system including the communication device according to the fifth aspect.

[0073] Regarding the technical effects provided by any of the designs in the fifth to ninth aspects, please refer to the technical effects provided by different implementations in the first to fourth aspects, and the details will not be described again in this specification. [Brief explanation of the drawings]

[0074] [Figure 1] 1 is a schematic diagram illustrating the architecture of a wireless communication system according to an embodiment of the present application; [Figure 2a] FIG. 2 is a schematic diagram illustrating the structure of an access point according to an embodiment of the present application; [Figure 2b] FIG. 2 is a schematic diagram illustrating the structure of a station according to an embodiment of the present application. [Figure 3]A schematic diagram showing the tone plan and contiguous RU distribution for 20 MHz. [Figure 4] A schematic diagram showing the tone plan and contiguous RU distribution for 40 MHz. [Figure 5] A schematic diagram showing the tone plan and contiguous RU distribution for 80 MHz. [Figure 6a] 1 is a schematic flow chart illustrating uplink multi-user transmission. [Figure 6b] 10 is another schematic flow chart illustrating uplink multi-user transmission. [Figure 6c] 10 is another schematic flow chart illustrating uplink multi-user transmission. [Figure 7A] 1 is a schematic diagram showing the frame format of an 802.11be trigger frame. [Figure 7B] 1 is a schematic diagram showing the frame format of an 802.11be trigger frame. [Figure 8] 1 is a schematic flow chart illustrating a communication method according to an embodiment of the present application; [Figure 9] 1 is a schematic diagram illustrating a structure of a communication device according to an embodiment of the present application; [Figure 10] 1 is a schematic diagram illustrating a structure of a communication device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0075] Hereinafter, the technical solutions in the embodiments of the present application will be clarified with reference to the accompanying drawings in the embodiments of the present application. Certainly explain.

[0076] In the description of this application, unless otherwise specified, " / " means "or." For example, A / B can refer to A or B. The term "and / or" in this specification describes only the associative relationship between related objects and indicates that three relationships may exist. For example, A and / or B can refer to the following three cases: when only A is present, when both A and B are present, or when only B is present. Also, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions refers to any combination of these items and includes any combination of single items or multiple items. For example, at least one of a, b, or c can represent a, b, c, a and b, a and c, b and c, or a, b, and c. a, b, and c can each be singular or plural.

[0077] In the description of this application, the terms "first" and "second" do not limit the quantity and execution order, and the terms "first" and "second" do not indicate a clear difference.

[0078] In this application, the terms "example" or "for example," etc., are used to denote serving as an example, illustration, or illustration. Any embodiment or design described by "example," "etc.", or "for example" in this application should not be construed as preferred or having greater advantages over other embodiments or designs. Rather, use of the terms "example," "etc.", or "for example," etc., is intended to present related concepts in a concrete manner.

[0079] It should be understood that in this application, "when" and "if" refer to the device performing the corresponding process in an objective situation and are not intended to limit the time. These terms do not imply that the device is required to take a decision-making action during implementation, nor do they imply any other limitations.

[0080] In this application, unless otherwise specified, elements referred to in the singular are intended to mean "one or more" but not "one and only one."

[0081] In this application, unless otherwise specified, identical or similar parts of embodiments or implementations shall be mutually referenced. In the embodiments and implementations / implementation methods of the present application, unless otherwise specified or unless a logical contradiction occurs, the terms and / or descriptions shall be consistent and may be mutually referenced between different embodiments and between implementations / implementation methods of the embodiments. The technical features of different embodiments and the technical features of the implementations / implementation methods of the embodiments may be combined to form new embodiments, implementations, or implementation methods based on their internal logical relationships. The following implementations of this application are not intended to limit the protection scope of this application.

[0082] In order to facilitate understanding of the method provided in the embodiment of the present application, the following describes the system architecture of the method provided in the embodiment of the present application. It can be understood that the system architecture described in the embodiment of the present application is intended to more clearly describe the technical solutions in the embodiment of the present application, and does not constitute any limitations on the technical solutions provided in the embodiment of the present application.

[0083] The technical solutions provided in the present application may be applied to various communication systems, such as systems using the 802.11 standard. For example, the 802.11 standard includes, but is not limited to, the 802.11be standard or the next-generation 802.11 standard. Scenarios to which the technical solutions of the present application are applicable include: communication between an AP and one or more STAs, communication between APs, or communication between STAs. In the embodiments of the present application, the term "communication" may also be expressed as "data transmission," "information transmission," or "transmission."

[0084] 1 is a schematic diagram illustrating the architecture of a wireless communication system according to an embodiment of the present application. As shown in FIG. 1, the wireless communication system may include one or more APs (such as AP 100 shown in FIG. 1) and one or more STAs (such as STA 200 and STA 300 shown in FIG. 1). The AP and the STA support a WLAN communication protocol. The communication protocol may include 802.11be (also called Wi-Fi 7, an extremely high throughput (EHT) protocol) and may further include protocols such as 802.11ax and 802.11ac. Indeed, with the continuous evolution and development of communication technologies, the communication protocol may further include next-generation protocols such as 802.11be and the like. A WLAN is used as an example. An apparatus for implementing the method in the present application may be an AP or a STA in a WLAN, or may be a chip or processing system mounted on the AP or the STA.

[0085] Optionally, an access point in the present application (e.g., AP 100 in FIG. 1 ) is a device having wireless communication capabilities and supporting communication based on a wireless local area network (WLAN) protocol. An access point has the capability of communicating with other devices (e.g., stations or other access points) in a WLAN network. Indeed, an access point may further have the capability of communicating with other devices. In a WLAN system, an access point may be referred to as an access point station (AP STA). A device having wireless communication capabilities may be an entire device, or a chip or processing system mounted on the entire device or the like. A device equipped with a chip or processing system may implement the methods and functions in the embodiments of the present application under the control of the chip or processing system. An AP in the embodiments of the present application is a device that provides services to STAs and may support an 802.11 family protocol. For example, an AP may be a communication entity such as a communication server, a router, a switch, or a bridge. An AP may include a macro base station, a micro base station, a relay station, and the like in various forms. Indeed, the AP may alternatively be chips and processing systems within these devices in various forms to implement the methods and functions in the embodiments of the present application.

[0086] Optionally, a station in this application (e.g., STA200 or STA300 in FIG. 1 ) is a device having wireless communication capabilities and supports communication by using a WLAN protocol. The station has the ability to communicate with another station or an access point in a WLAN network. In a WLAN system, a station may be referred to as a non-access point station (non-AP STA). For example, a STA is any user communication device that allows a user to communicate with an AP and further with a WLAN. The device having wireless communication capabilities may be an entire device, or a chip or processing system mounted on the entire device or the like. The device equipped with the chip or processing system may implement the methods and functions in the embodiments of this application under the control of the chip or processing system. For example, the STA may be a user equipment capable of connecting to the Internet, such as a tablet computer, desktop computer, laptop computer, notebook computer, ultra-mobile personal computer (UMPC), handheld computer, netbook, personal digital assistant (PDA), or mobile phone. Alternatively, the STA may be an Internet of Things node in the Internet of Things, an in-vehicle communication device in the Internet of Vehicles, an entertainment device, a gaming device or system, a global positioning system device, or the like. Alternatively, the STA may be a chip and processing system within the terminal described above.

[0087] WLAN systems can provide high-speed and low-latency transmission. With the continuous evolution of WLAN application scenarios, WLAN systems are being applied in more scenarios and industries, such as the Internet of Things industry, Internet of Vehicles industry, banking industry, corporate offices, stadiums and exhibition halls, concert halls, hotel rooms, dormitories, hospital wards, classrooms, supermarkets, squares, streets, production workshops, and warehouses. Indeed, devices (e.g., access points or stations) supporting WLAN communication may be sensor nodes in a smart city (e.g., smart water meters, smart energy meters, or smart air detection nodes), smart devices in a smart home (e.g., smart cameras, projectors, displays, televisions, stereos, refrigerators, or washing machines), nodes in the Internet of Things, entertainment terminals (e.g., wearable devices such as augmented reality (AR) devices or virtual reality (VR) devices), smart devices in a smart office (e.g., printers, projectors, speakers, or stereos), Internet of Vehicles devices in the Internet of Vehicles, infrastructure in everyday life scenarios (e.g., vending machines, self-service navigation consoles in supermarkets, self-service cash registers, or self-service ordering machines), devices in large stadiums and music venues, and the like. The specific forms of STAs and APs are not limited to the embodiments of this application and are merely illustrative examples herein.

[0088] It should be understood that the 802.11 standard focuses on the physical layer (PHY) and medium access control (MAC) layers. For example, FIG. 2a is a schematic diagram illustrating the structure of an access point according to one embodiment of the present application. The AP may be a multi-antenna / multi-radio frequency AP or a single-antenna / single-radio frequency AP. The antenna / radio frequency is configured to transmit / receive data packets (data packets herein may also be referred to as physical layer protocol data units, or PPDUs). In one implementation, the antenna portion or radio frequency portion of the AP may be separated from the main body portion of the AP and reside in a remote layout structure. In FIG. 2a, the AP may include a physical layer processing circuit and a medium access control processing circuit. The physical layer processing circuit may be configured to process physical layer signals, and the MAC layer processing circuit may be configured to process MAC layer signals. In another example, FIG. 2b is a schematic diagram illustrating the structure of a station according to one embodiment of the present application. FIG. 2b is a schematic diagram illustrating the structure of a single-antenna / single-radio frequency STA. In a practical scenario, the STA may alternatively be a multi-antenna / multi-radio frequency STA, i.e., a device with three or more antennas. The antennas / radio frequencies are configured to transmit / receive data packets. In one implementation, the antenna portion or radio frequency portion of the STA may be separated from the main body portion of the STA and reside in a remote layout structure. In FIG. 2b, the STA may include a PHY processing circuit and a MAC processing circuit. The physical layer processing circuit may be configured to process physical layer signals, and the MAC layer processing circuit may be configured to process MAC layer signals.

[0089] The above is a brief description of the system architecture in the embodiments of the present application. In order to better understand the technical solutions in the embodiments of the present application, the following describes the contents related to the embodiments of the present application.

[0090] 1. Resource unit (RU) based tone plan

[0091] The 802.11ax standard (also known as the high-efficiency (HE) standard) supports bandwidth configurations of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 80+80 MHz. The difference between 160 MHz and 80+80 MHz is that 160 MHz is a contiguous frequency band, while 80+80 MHz is two discontinuous 80 MHz bands (each 80 MHz band is a contiguous frequency band). To meet user requirements for ultra-large bandwidth, ultra-high transmission speeds, and ultra-high throughput, the 802.11be standard (also known as the EHT standard) extends the bandwidth from 160 MHz to 320 MHz. That is, the 802.11be standard supports a 320 MHz / 160+160 MHz bandwidth configuration. In addition, the 802.11be standard allocates resources in RU units.

[0092] Below, the tone plans and RU distributions for different bandwidth sizes are described separately by using examples.

[0093] Figure 3 is a schematic diagram showing the tone plan and RU distribution for 20 MHz. As shown in Figure 3, when the bandwidth is 20 MHz, the entire bandwidth (i.e., 20 MHz) includes one 242-tone RU, or various combinations of 26-tone RU, 52-tone RU, and 106-tone RU.

[0094] Each RU includes data tones and pilot tones, where the data tones may be used to carry data information and the pilot tones are used to estimate phase and / or frequency offsets.

[0095] Optionally, the data tones and pilot tones may be used to carry LTF sequences.

[0096] In addition to the RU, the 20 MHz bandwidth also includes several guard tones, null tones, and / or direct current (DC) tones. Specifically, for the range of tones (subcarrier ranges) included in the RU, see Table 27-7 in 802.11ax.

[0097] It should be understood that a 242-tone RU may be understood as an RU containing 242 tones. Similarly, a 26-tone RU may be understood as an RU containing 26 tones, a 52-tone RU may be understood as an RU containing 52 tones, and a 106-tone RU may be understood as an RU containing 106 tones.

[0098] Figure 4 is a schematic diagram showing the tone plan and RU distribution for 40 MHz. As shown in Figure 4, the entire bandwidth (i.e., 40 MHz) includes one 484-tone RU or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, and 242-tone RU. A 484-tone RU can be understood as an RU that includes 484 tones. Specifically, for the range of tones included in an RU, see Table 27-8 in 802.11ax.

[0099] Figure 5 is a schematic diagram showing the tone plan and RU distribution for 80 MHz. As shown in Figure 5, the entire bandwidth (i.e., 80 MHz) includes one 996-tone RU or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, and 484-tone RU. As shown in Figure 5, 484L in Figure 5 represents the left half of the 484-tone RU (i.e., tone range [-500:-17] or tone range [17:500]), and 484R in Figure 5 represents the right half of the 484-tone RU, which includes 242 tones, which is another way of expressing 484+5DC. Specifically, for the locations of the tones included in an RU, please refer to Table 27-8 in 802.11ax. A 996-tone RU can be understood as an RU containing 996 tones. The terms "left" and "right" in this specification refer only to a relative relationship to the center position in the frequency domain. As an example, a 484-tone RU [-500:-17] is used. In the actual frequency domain resource, "484L" is the low-frequency part of the 484-tone RU relative to the frequency domain center, i.e., [-500:-259], and "484R" is the high-frequency part of the 484-tone RU relative to the frequency domain center, i.e., [-258:-17]. Similarly, as an example, a 484-tone RU [17:500] is used. "484L" is [17:258], and "484R" is [259:500].

[0100] If the bandwidth is 160 MHz, the entire bandwidth (i.e., 160 MHz) can be understood as a duplication of two 80 MHz tone plans. The entire bandwidth (i.e., 160 MHz) includes two 996-tone RUs, or any combination of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, 484-tone RUs, and 996-tone RUs. If the bandwidth is 320 MHz, the entire bandwidth (i.e., 320 MHz) can be understood as a duplication of four 80 MHz tone plans. Details will not be described again in this specification.

[0101] In the various tone plans shown in Figures 3 to 5, a 242-tone RU is used as one unit. Assume that the leftmost RU in Figures 3 to 5 has the lowest frequency and the rightmost RU in Figures 3 to 5 has the highest frequency. From left to right, the 242-tone RUs can be numbered as follows: 1 (first), 2 (second), ..., and 16 (sixteenth). It should be understood that a 320 MHz bandwidth is used as an example. The data field in a radio frame occupies up to 16 242-tone RUs. In other words, in the data field, the up to 16 242-tone RUs are in one-to-one correspondence with the 16 20 MHz channels in ascending frequency order.

[0102] In terms of bandwidth, a 26-tone RU corresponds to 2 MHz, a 52-tone RU corresponds to 4 MHz, a 106-tone RU corresponds to 8 MHz, and a 242-tone RU corresponds to 20 MHz. Bandwidths corresponding to RUs of other sizes can be obtained correspondingly by addition or multiplication. Details will not be described again in this specification.

[0103] It should be understood that the 802.11be standard allows multiple RUs to be assigned to one STA. That is, multiple RUs can be combined and assigned to one STA. Therefore, the 802.11be standard supports multiple resource units (MRUs). In other words, in addition to the several RUs mentioned above, the 802.11be standard also includes several MRUs. For example, one 52-tone RU and one 26-tone RU form a 52+26-tone MRU, one 106-tone RU and one 26-tone RU form a 106+26-tone MRU, one 996-tone RU and one 484-tone RU form a 996+484-tone MRU, two 996-tone RUs and one 484-tone RU form a 2*996+484-tone MRU, three 996-tone RUs form a 3*996-tone MRU, and three 996-tone RUs and one 484-tone RU form a 3*996+484-tone RU. It should further be understood that the symbol "*" herein means "to multiply" or "multiplied by."

[0104] 2. Uplink Multi-User Transmission and LTF

[0105] Uplink multi-user transmission is an important technology in 802.11ax and 802.11be. Figure 6a is a schematic flowchart illustrating uplink multi-user transmission. As shown in Figure 6a, the uplink multi-user transmission procedure includes the following: an AP transmits a trigger frame to trigger uplink multi-user transmission, and the trigger frame carries the identifier information and resource allocation information of one or more stations. After receiving the trigger frame, each station transmits an uplink data frame on the assigned resource unit (RU) by using a TB PPDU and receives a block acknowledgment (BA) frame sent by the AP after a short interframe space (SIFS).

[0106] In an implementation example, the communication process in the implementation process shown in Fig. 6a may be implemented by Fig. 6b. After receiving the trigger frame, the STA obtains the user information field that matches the AID of the STA from the trigger frame through analysis, and then transmits the TB PPDU on the RU indicated by the resource unit allocation subfield in the user information field.

[0107] For example, in a HE communication scenario, the fields included in the HE TB PPDU are shown in Figure 6b, and the names and functions of the fields are shown in Table 1.

[0108] [Table 1]

[0109] Optionally, in other communication scenarios other than HE, the TB PPDU may include an LTF (i.e., L-LTF in Table 1), which is used for channel estimation. An LTF sequence is designed for each bandwidth and defines the value carried on each tone during the LTF transmission process. In a multi-stream scenario, multiple OFDM symbols are transmitted to perform channel estimation for each stream.

[0110] The following describes the 4x, 2x, and 1x modes of the LTF. To further improve system efficiency in various scenarios, the LTF field needs to support the 4x, 2x, and 1x modes. Figure 6c is a schematic diagram illustrating the 4x, 2x, and 1x modes applicable to the embodiments of the present application. A 20 MHz bandwidth is used as an example. When the tone positions are marked as -128, -127, ..., -2, -1, 0, 1, 2, ..., and 127, the tones in the 4x HE-LTF symbol carrying the long training sequence are located at -122, -121, ..., -3, -2, 2, 3, ..., 121, and 122, and the remaining tones are null tones, and the tone spacing is as follows:

[0111]

number

[0112] The tones in the 2x HE-LTF symbols carrying the long training sequence are located at -122, -120, ..., -4, -2, 2, 4, ..., 120, and 122, and the remaining tones are null tones. Equivalently, the tone positions may be marked as -64, -63, ..., -2, -1, 0, 1, 2, ..., and 63. In this case, the tones in the 2x HE-LTF symbols carrying the long training sequence are located at -61, -60, ..., -2, -1, 1, 2, ..., 60, and 61, and the remaining tones are null tones, and the tone spacing is as follows:

[0113]

number

[0114] Similarly, the tones in a 1x HE-LTF symbol carrying a long training sequence are located at -120, -116, ..., -8, -4, 4, 8, ..., 116, and 120, and the remaining tones are null tones. Equivalently, the tone positions may be marked as -32, -31, ..., -2, -1, 0, 1, 2, ..., and 31. In this case, the tones in a 1x HE-LTF symbol carrying a long training sequence are located at -30, -29, ..., -2, -1, 1, 2, ..., 29, and 30, and the remaining tones are null tones, and the tone spacing is as follows:

[0115]

number

[0116] That is, four adjacent elements in a sequence form a group. If only one element in a group is non-zero, 1x mode is used. If two elements in a group are non-zero, 2x mode is used. If none of the four elements in a group are zero, 4x mode is used. In other words, LTF sequences are divided into 1x, 2x, and 4x sequences. There are at least three zeros between two non-zero elements in an LTF 1x sequence, at least one zero between two non-zero elements in an LTF 2x sequence, and there are consecutive non-zero elements in an LTF 4x sequence. The non-zero elements in an LTF 4x sequence are the most dense, and therefore, channel estimation is most accurate. The protocol defines LTF 1x, LTF 2x, and LTF 4x sequences for various bandwidths.

[0117] Using 80M bandwidth as an example, the LTF 4x sequence is as follows: HELTF4x-500,500 = [+1, +1, -1, +1, -1, +1, -1, -1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, -1, +1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, +1, +1, +1, -1, -1, -1, -1, -1, -1, +1, +1, +1, +1, +1, +1, -1, +1, +1, +1, -1, +1, +1, -1,-1, -1, +1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1, -1, -1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, +1, +1, +1, +1, +1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1,-1, +1, -1, +1, +1, -1, +1, +1, -1, +1, -1, -1, +1, -1, +1, -1, +1, -1, +1, +1,+1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1,-1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, -1, -1,-1, -1, -1, -1, +1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, -1, +1, -1,-1, +1, -1, +1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1,-1, -1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, -1,-1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, +1,-1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1, -1,-1, -1, +1, -1, +1, -1, -1, -1, -1, +1, +1, +1, -1, -1, +1, 0, 0, 0, 0, 0,+1, -1, -1, -1, -1,-1, -1, +1, -1, +1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, -1, +1, +1, +1, +1, +1, +1, +1, -1, +1, -1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, +1, -1, -1, -1,-1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1,-1, -1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, -1, +1,-1, -1, +1, -1, +1, +1, +1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, -1, -1, +1, -1,-1, -1, +1, -1, -1, -1, -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1, +1, -1, -1, -1, -1, +1, +1, -1, -1, -1,-1, -1, +1, -1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1,+1, -1, +1, -1, +1, +1, +1, +1,-1, +1, -1, -1, + ... -1, -1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, +1, -1, -1, +1, -1, +1, -1, +1, +1, +1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1, +1, -1, -1, +1, +1, -1, -1, +1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, -1, +1, -1, -1, +1, -1, -1, +1, -1, -1, +1, -1, -1, +1, -1, -1, -1, -1, -1, +1,-1, +1, +1, -1, +1, +1, -1, +1, -1, -1, +1, +1, -1, -1, +1, +1, -1, +1, +1, +1, -1, +1, +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, -1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, +1, -1, +1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, +1], is.

[0118] In addition, the 11ax protocol supports 20M Hz , 40M Hz , 80M Hz , and 160M Hz In the 11be generation, LTF 1x sequences, LTF 2x sequences, and LTF 4x sequences are defined for the 20M bandwidth. Hz , 40M Hz , 80M Hz , and 160M Hz The LTF 1x, LTF 2x, and LTF 4x sequences for IEEE 11ax match those for 11ax, while only the LTF 1x, LTF 2x, and LTF 4x sequences are designed for the newly added 320M bandwidth.

[0119] Optionally, FIGS. 7A and 7B are schematic diagrams illustrating the frame format of an 802.11be trigger frame. As shown in FIGS. 7A and 7B, the 802.11be trigger frame includes, but is not limited to, a common information field and a user information list field. The common information field includes common information that needs to be read by all STAs (STAs in this specification include at least one of HE STAs and EHT STAs). An EHT STA in this specification is a station that not only supports the EHT protocol but also complies with HE and previous protocols. In some scenarios and embodiments, an HE STA in this specification fully supports the HE protocol but does not support future Wi-Fi protocols, such as the EHT protocol. However, it should be understood that this specification does not necessarily mean that all HE STAs will be unable to support future Wi-Fi protocols. The common information field includes, but is not limited to, an uplink bandwidth (UL BW) subfield, which is used together with an uplink bandwidth extension subfield (UL BW Extension subfield) in the specific user information field to indicate the total uplink transmission bandwidth. The User Information List field includes, but is not limited to, one Special User Information field (the value of the Association Identifier 12 subfield is equal to 2007) and one or more EHT Variant User Information fields. The Special User Information field contains common information that needs to be read by all EHT STAs. The EHT Variant User Information field contains information that needs to be read by one EHT STA. The EHT Variant User Information field includes, but is not limited to, an Association Identifier 12 (AID12) subfield and an RU allocation subfield.The AID12 subfield indicates the association identifier of the STA, and the RU Allocation subfield indicates the specific location of the resource unit allocated to the STA (ie, the STA indicated by the AID12 subfield).

[0120] For an EHT STA, the RU or MRU allocated to the EHT STA can be jointly indicated by using the following subfields in the trigger frame: RU Allocation subfield, UL BW subfield, UL BW Extension subfield, and Primary / Secondary 160 subfield. From the format of the trigger frame shown in FIG. 7A, it can be seen that the common information field includes a Special User Information Field Presence Indication subfield, which is used to indicate whether a special user information field exists in the user information area. For an EHT TB PPDU transmitted by a station, the bandwidth of the EHT TB PPDU is determined jointly by the UL BW subfield and the UL BW Extension subfield. The mapping relationship between the RU Allocation subfield B0, the RU Allocation subfields B7-B1, and the PS160 is shown in Table 2 below.

[0121] The bandwidth in Table 2 is determined based on both the UL BW subfield and the UL BW extension subfield, and N can be obtained by using the formula N=2*X1+X0. For the values ​​of X1 and X0, see Table 3 below. Table 3 shows the conversion from the logical parameters PS160 and B0 to the physical parameters X1 and X0.

[0122] [Table 2-1]

[0123] [Table 2-2]

[0124] [Table 2-3]

[0125] [Table 2-4]

[0126] [Table 2-5]

[0127] [Table 3]

[0128] It should be understood that in Table 3, P80 represents the primary 80 MHz channel, S80 represents the secondary 80 MHz channel, and S160 represents the secondary 160 MHz channel.

[0129] The frequency band configurations in Table 3 refer to the sequence of P80, S80, and S160 in absolute frequency, representing frequencies from low to high consecutively from left to right. For example, [P80 S80] indicates that the primary 80 MHz channel is the first 80 MHz channel in ascending frequency order, and the secondary 80 MHz channel is the second 80 MHz channel in ascending frequency order. In other words, [P80 S80] indicates that the primary 80 MHz channel is the lower 80 MHz channel, and the secondary 80 MHz channel is the upper 80 MHz channel. In another example, [S80 P80 S160] indicates that the secondary 80 MHz channel is the lower 80 MHz channel of the lower 160 MHz channel, the primary 80 MHz channel is the upper 80 MHz channel of the lower 160 MHz channel, and the secondary 160 MHz channel is the upper 160 MHz channel.

[0130] 3.Distributed RU / Discrete RU

[0131] In a low power indoor (LPI) communication scenario, the maximum power and maximum power spectral density for transmission are limited. Compared with the maximum power, the maximum power spectral density is more strictly limited, and the maximum allowable power for transmission is usually more limited by the power spectral density. Due to the limitation of the maximum power spectral density, the transmission power of a single consecutive RU is limited. It should be understood that consecutive RUs in this application are RUs that include multiple consecutive tones or RUs that include two sets of consecutive tone groups. The multiple tones included in each set of consecutive tone groups are consecutive. The two sets of consecutive tone groups are separated only by a guard tone, a null tone, or a DC tone. Of course, consecutive RUs may have other names. The name of consecutive RUs is not limited in this application.

[0132] The maximum power spectral density is the maximum transmission power of 1 MHz. In other words, the maximum power spectral density is limited so that the transmission power of 1 MHz does not exceed x dBm (dBm = 10lg (mW), where lg represents the logarithm to the base 10). The minimum granularity of the maximum power spectral density is 1 MHz. Therefore, when the transmission power of 1 MHz is not changed, i.e., when the power spectral density is not changed, a technique called discrete RU or distributed RU technology is proposed to increase the transmission power. Discrete RU / distributed RU corresponds to continuous RU. A discrete RU includes multiple tones that are discrete in the frequency domain. Some or all of the multiple discrete tones may be discrete. In other words, the multiple discrete tones may include some tones that are contiguous in frequency and some tones that are discontinuous in frequency. Alternatively, none of the multiple discrete tones are contiguous in frequency. It should be understood that the terms "discrete RU," "distributed RU," and "DRU" may be used interchangeably herein.

[0133] For discrete RUs and continuous RUs containing the same number of tones, the bandwidth spanned by the discrete RUs from a low-frequency start position to a high-frequency end position in the frequency domain is larger than the frequency-domain bandwidth occupied by the continuous RUs. Thus, if the maximum power spectral density is the same, the total transmission power of the discrete RUs is higher than that of the continuous RUs. In other words, when the power spectral density is limited, a limited number of tones (e.g., 26 tones included in a continuous 26-tone RU) are discretely allocated to a wider bandwidth, i.e., more tones (e.g., odd-numbered tones in two continuous 26-tone RUs), thereby increasing the transmission power. Therefore, when data is transmitted using discrete RUs compared to continuous RUs, the transmission power of a single RU can be increased, thereby increasing the transmission power on a single tone and improving the signal-to-noise ratio (SNR).

[0134] It can be understood that in this embodiment of the present application, in one transmission process of a user (STA), the transmission power of all tones in the resource unit (RU) allocated to the STA is the same. As an example, a tone spacing of 78.125 kHz is used. 1 MHz contains 12.8 (approximately 13) tones. Assume that the transmission power of 1 MHz does not exceed pmW (i.e., maximum power spectral density). The maximum number of tones carrying a signal in any 13 consecutive tones determines the average power of each tone, which further determines the transmission power of the signal. The transmission power of a signal is equal to the product of the average power of each tone and the number of tones. For example, assume that a maximum of five tones in any 13 consecutive tones (1 MHz) carry a signal. In this case, the average power of each tone in a 1 MHz bandwidth is (p / 5) mW. Assume that a maximum of two tones in any 13 consecutive tones (1 MHz) carry a signal. In this case, the average power of each tone in a 1 MHz bandwidth is (p / 2) mW. In other words, the maximum power spectral density is specific, and the greater the number of tones carrying signals among any 13 consecutive tones, the smaller the average power on each tone and the smaller the total transmission power. Assuming that the resource unit allocated to the STA is a discrete 26-tone RU, i.e., the number of tones carrying signals is 26, if a maximum of two tones among any 13 consecutive tones carry signals, i.e., the bandwidth occupied by the discrete 26-tone RU is 26 / 2=13 MHz, it can be seen that the average power of each tone in a 1 MHz bandwidth is (p / 2) mW, and the total transmission power of the discrete 26-tone RU can be calculated based on the total transmission power of the tones, which is specifically (p / 2)*26 mW, or based on the bandwidth occupied by the tones, which is specifically 13*p mW.If the resource unit allocated to the STA is a 26-tone consecutive RU, the 26-tone consecutive RU contains 26 consecutive tones (two sets of 13 consecutive tones), i.e., the bandwidth occupied by the 26-tone consecutive RU is 2 MHz. Therefore, the average power of each tone within a 1 MHz bandwidth is (p / 13) mW. The total transmission power of the 26-tone consecutive RU can be calculated based on the total transmission power of the tones, which is (p / 13)*26 mW, or based on the bandwidth occupied by the tones, which is 2*p mW. In comparison, under the same maximum power spectral density, the total transmission power of the discrete 26-tone RU is 6.5 times higher than that of the consecutive 26-tone RU.

[0135] It should be understood that a discrete RU / distributed RU / DRU described herein is an RU having tones that are discrete in the frequency domain. In other words, an RU having this feature is referred to as a discrete RU / distributed RU / DRU in this specification. However, in practice, an RU having this feature may have a different name. This is not a limitation in this application. For ease of explanation, in the following embodiments, an RU having this feature will be referred to as a DRU.

[0136] 4. Peak-to-average power ratio

[0137] The amplitude of a wireless signal is constantly changing in the time domain. Therefore, the transmission power of a wireless signal is not constant. Peak to average power ratio (PAPR) is short for peak to average ratio. The peak to average power ratio can be the ratio of the instantaneous power peak value of a continuous signal to the average signal power value in one symbol. The peak to average power ratio can be expressed using the following formula:

[0138]

number

[0139] X irepresents the time-domain discrete values ​​of a set of sequences, max(X i 2 ) represents the maximum square of the time-domain discrete values, mean(X i 2 ) represents the mean value of the square of the time domain discrete values.

[0140] An OFDM symbol is obtained by superimposing multiple independently modulated tone signals. If the tone phases are identical or similar, the superimposed signals are modulated by the same initial phase signal, resulting in a relatively large instantaneous power peak value. This leads to a relatively large PAPR. OFDM systems have the disadvantage of high PAPR, and the more tones they use, the more severe the PAPR becomes, especially in high bandwidths. Due to the limited dynamic range of typical power amplifiers, MIMO-OFDM signals with relatively large peak-to-average ratios are likely to enter the power amplifier's nonlinear region. A high PAPR causes nonlinear signal distortion, resulting in obvious spread-spectrum interference and in-band signal distortion. This degrades system performance. Therefore, when designing sequences, the smaller the PAPR of the sequence, the better.

[0141] OFDM uses frequency domain equalization technology. Therefore, the accuracy of channel estimation has a significant impact on communication performance. However, OFDM systems suffer from a high PAPR, especially in high bandwidths. The more tones there are, the more severe the PAPR becomes. The higher the PAPR becomes, leading to nonlinear signal distortion and degrading system performance.

[0142] From the above, it can be seen that the tones included in a resource unit are discretely allocated to a larger bandwidth (larger than the bandwidth occupied by consecutive RUs), thereby improving the transmission power. In addition, in a scenario where communication is performed based on DRUs, how to reduce the PAPR to improve system performance is an urgent technical problem to be solved.

[0143] For example, if the EHT-LTF4x sequence determined by 11be generation is still used, for the DRU, the tone corresponding to the DRU is selected to transmit the LTF, and the obtained PAPR data is shown in Table 4.

[0144] [Table 4]

[0145] From Table 4, it can be seen that if the EHT-LTF4x sequence is used directly in the DRU, it will cause an excessively large PAPR, leading to inaccurate channel estimation and degraded system performance.

[0146] Therefore, the present application provides a communication method and apparatus for not only improving transmission efficiency in DRU transmission mode, but also improving system performance due to the relatively low PAPR of the LTF included in the TB PPDU.

[0147] Below, the technical solutions provided in this application will be described in detail with reference to more accompanying drawings.

[0148] Optionally, a station in this application may be any STA shown in FIG. 1 , for example, STA 200. An access point in this application may be any AP shown in FIG. 1 , for example, AP 100. Both the station and the access point in this application support the 802.11be protocol and may further support other WLAN communication protocols, such as 802.11ax and 802.11ac. It should be understood that the station and the access point in this application may further support a next-generation protocol of 802.11be. In other words, the method provided in this application is applicable not only to the 802.11be protocol but also to a next-generation protocol of 802.11be.

[0149] 8 is a schematic diagram illustrating a communication method according to the present application. The method includes the following steps:

[0150] S101: The AP transmits a trigger frame.

[0151] In this embodiment, the AP transmits a trigger frame in step S101, and the STA receives the trigger frame in response in step S101. The trigger frame includes DRU indication information, which indicates the DRU used by the STA to transmit the TB PPDU.

[0152] It can be understood that the trigger frame described in this embodiment and the following embodiments may be in various possible frame formats, may be a control frame type of MAC frame defined in a standard, may be called a trigger frame, for example, a trigger frame in the above-mentioned 802.11be, or may be another MAC frame with a trigger function. The other MAC frame with a trigger function may also be called a MAC frame with a TRS (triggered response scheduling) function, and the function is usually implemented by including a TRS control subfield in the MAC frame. In a specific example, the DRU indication information described in step S101 may be carried in an RU allocation field in a user information field in the trigger frame, or may be carried in an RU allocation field in a TRS control subfield in another MAC frame.

[0153] Optionally, the DRU indication information indicates the size and location of the DRU allocated to the station. The DRU size is the number of tones of the DRU, and the DRU location is the location of the tones of the DRU in the frequency domain. Typically, the tone index range (subcarrier index range) indicates the location of the tones of the DRU in the frequency domain. The size and location of the DRU follow the size and location predefined in the standard. Optionally, the DRU indication information in the trigger frame may reuse the continuous RU signaling indication method to reduce complexity. In other words, the DRU indication information in the trigger frame may be a predefined RU allocation subfield. See Table 2.

[0154] It should be noted that the DRU indication information indicating the DRU to be used by the STA to transmit the TB PPDU may be expressed as the DRU indication information indicating the DRU assigned to the STA, or the DRU indication information may be expressed as indicating the DRU assigned to the STA by the AP, and the DRU to be used to transport the TB PPDU.

[0155] Optionally, the AP determines DRUs to be assigned to one or more stations based on the DRU's tone plan and the signal quality of each tone, for example, assigning a DRU including a tone with relatively good quality to the station. In step S101, the AP transmits a trigger frame to trigger uplink multi-user transmission, where the trigger frame includes DRU instruction information for the one or more stations. In response, in step S101, the AP schedules each station for uplink multi-user transmission to receive the trigger frame.

[0156] For ease of understanding, one station is used as an example for explanation in this embodiment of the present application. The frame format of the trigger frame can be shown in Figures 7A and 7B, and the details will not be described again in this specification. The DRU indication information included in the trigger frame indicates the DRU (including size and location) allocated to the station. The DRU indication information includes an RU allocation subfield, an uplink bandwidth subfield, an uplink bandwidth extension subfield, and a primary / secondary 160 subfield. For the indication method of the DRU indication information, please refer to Table 5 below. Table 5 is similar to Table 2, except that the RU in Table 2 is replaced by the DRU in Table 5. The MDRU in Table 5 is a larger DRU combined by the corresponding DRU. The principle of combination is consistent with the principle of combining consecutive RUs into an MRU, and the details will not be described again. That is, the AP may allocate resource units to STAs in the manner described in Table 2. In other words, in this embodiment of the present application, the indication method of continuous RUs can be reused to allocate discrete resource units to STAs, which can improve compatibility and reduce the complexity of product implementation.

[0157] [Table 5-1]

[0158] [Table 5-2]

[0159] [Table 5-3]

[0160] [Table 5-4]

[0161] [Table 5-5]

[0162] It should be understood that since the AP may simultaneously schedule multiple STAs to perform uplink transmissions, the AP may determine which tones of data belong to the same STA based on the resource units assigned to each STA and the tone plan for distributed RUs in a 20 MHz bandwidth, thereby allowing the AP to distinguish between uplink data from various STAs.

[0163] Optionally, the trigger frame may include indication information indicating whether the station uses a DRU or a continuous RU. Based on the indication of the indication information, after receiving the trigger frame, the station may know the type of the scheduled RU, i.e., whether the RU is a DRU or a continuous RU, thereby enabling the compatible use of the DRU and the continuous RU to be implemented without increasing signaling overhead.

[0164] For example, the indication information may be carried in a sub-field of the common information field of the trigger frame. The sub-field in the common information field may be a reserved field in the common information field of the trigger frame (a reserved field in 11be) or a separate field. This is not specifically limited in the present application. In addition, when a reserved field in the common information field of the trigger frame is used to carry the indication information, the reserved field is used and is no longer considered as a reserved field. It should be understood that the trigger frame in this specification may be replaced by a MAC frame with a TRS function, and the indication information indicating whether a station uses distributed RUs or continuous RUs may be placed in a reserved bit of the TRS sub-field or a newly added sub-field. Similarly, when a reserved bit is used, the reserved bit is no longer considered as a reserved bit.

[0165] S102: The AP and the STA transmit and receive TB PPDUs on the DRU.

[0166] In this embodiment, in step S102, the STA transmits a TB PPDU on the DRU, and in response, in step S102, the AP receives the TB PPDU on the DRU.

[0167] It can be understood that in step S101, after the STA receives the trigger frame transmitted by the AP, the STA can determine the DRU assigned to the station based on the indication of the DRU indication information in the trigger frame, and in step S102, the STA transmits a TB PPDU on the DRU.

[0168] The specific tones included in the DRU may be determined by the DRU's tone plan. Several implementations in the present application provide several DRU tone plans. For details, please refer to the following embodiments. It should be noted that the communication bandwidth between the STA and the AP provided in this embodiment of the present application may include 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. The following description will be given by using a tone plan for 20 MHz as an example. Obviously, referring to this example, a tone plan for 40 MHz, 80 MHz, 160 MHz, or 320 MHz may be implemented.

[0169] In the distributed RU tone plan, a 20 MHz bandwidth contains nine 26-tone DRUs, each containing 24 data tones and two pilot tones.

[0170] In a distributed RU tone plan, the 20 MHz bandwidth may further include four 52-tone DRUs, each of which may be considered as a splicing of two 26-tone DRUs, i.e., each 52-tone DRU includes 48 data tones and 4 pilot tones.

[0171] In a distributed RU tone plan, the 20 MHz bandwidth may further include two 106-tone DRUs, and each 106-tone DRU may be considered as a splicing of two 52-tone DRUs and two auxiliary tones.

[0172] Optionally, two 52-tone DRUs include eight pilot tones, and one 106-tone DRU requires only four pilot tones, so four pilot tones are selected from the eight pilot tones as pilot tones for the 106-tone DRU, and the other four pilot tones are used as data tones for the 106-tone DRU. In other words, each 106-tone DRU includes 100 data tones, two auxiliary tones, and four pilot tones. Because the auxiliary tones are also data tones, each 106-tone DRU is equivalent to including 102 data tones and four pilot tones. A 26-tone DRU may be understood as a distributed RU including 26 tones and may be abbreviated as DRU26. Similarly, a 52-tone DRU may be understood as a distributed RU including 52 tones and may be abbreviated as DRU52, and a 106-tone DRU may be understood as a distributed RU including 106 tones and may be abbreviated as DRU106. It should further be understood that other dimensions / sizes of DRUs have a similar understanding and may have corresponding short names, but are not listed one by one herein.

[0173] Specifically, see the following description for the tones included in the 26-tone DRU, 52-tone DRU, and 106-tone DRU in the implementations described above.

[0174] It should be understood that there are a total of 256 tones in a 20 MHz bandwidth, and the indices of the 256 tones can be expressed as [-128:127], i.e., -128, -127, -126, ..., -1, 0, 1, ..., 125, 126, and 127. Tone indices in this application can be numbered in ascending order of frequency. Specifically, the tone with the smallest index value has the lowest frequency, and the tone with the largest index value has the highest frequency. The indices of guard tones in a 20 MHz bandwidth are [-128:-123, 123:127], and the indices of DC tones are [-3:3]. The data and pilot tone indices are [-122:-4, 4:122]. Specifically, the total number of data tones and the total number of pilot tones corresponding to resource units of various sizes / dimensions in a 20 MHz bandwidth are described below. Further details will not be provided herein.

[0175] It should be noted that during tone plan design for a distributed RU in a 20 MHz bandwidth, data tones and pilot tones with indices [-122:-4, 4:122] may be used as an initial tone set, and a data tone set and pilot tone set that fit a distributed RU of corresponding size may be selected from the initial tone set. For example, for a DRU with a distributed RU size of 26 tones, the 20 MHz bandwidth may include nine 26-tone DRUs, each containing 24 data tones and two pilot tones. For example, 24*9 data tones in [-122:-4, 4:122] may be used as the data tone set, and then a portion of the initial tone set [-122:-4, 4:122] excluding the data tone set may be used as the pilot tone set. Based on the data tone set and pilot tone set of the 26-tone DRU, the data tone set and pilot tone set of the larger distributed RU may be adjusted, or the corresponding data tone set and corresponding pilot tone set may be redetermined based on the corresponding size of the DRU (e.g., 52-tone RU, 106-tone RU, or 242-tone RU, etc.). This is not limited in the present application. Furthermore, under the condition that the transmission power of the STA may be increased, the tones specifically used as the data tone set and the pilot tone set are not limited in the present application. For example, a 26-tone DRU is used as an example. The middle part with indexes [-122:-4, 4:122] may be used as the data tone set in a 20 MHz bandwidth, and a part of the tone set [-122:-4, 4:122] excluding the data tone set may be used as the pilot tone set. In this specification, the middle part may be understood as the symmetrical positive and negative frequencies (positive and negative tone indexes) with respect to the center frequency (tone with index 0) as the boundary. Alternatively, the data tone set may not be exactly in the middle of [-122:-4, 4:122]. Instead, it could be in the middle with some tones translating either leftward or rightward.In other words, the negative and positive tone indices of the data tone set are not perfectly symmetrical.

[0176] In this embodiment of the present application, a concrete explanation is given by using an example in which some of the tones on the positive and negative frequency bands (i.e., tones with indices [-122:-4, 4:122]) are used as a data tone set in a 20 MHz bandwidth, and some of the tone set [-122:-4, 4:122] excluding the data tone set is used as a pilot tone set.

[0177] Optionally, in a tone plan for distributed RUs on a 20 MHz bandwidth (20 MHz tone plan), 216 tones with indices [-115:-8, 8:115] are used as a data tone set in the 20 MHz bandwidth, 18 of the 22 tones with a tone range [-122:-116, -7:-4, 4:7, 114:122] are used as pilot tones, and the other 4 tones are used as null tones (for the 26-tone RU and 52-tone RU) or auxiliary tones for the two 106-tone RUs.

[0178] It should be noted that in another 20 MHz tone plan, 216 tones with indices [-117:-10,10:117] (or [-113:-6,6:113]) can be used as a data tone set in a 20 MHz bandwidth, and 18 of 22 tones with a tone range [-122:-118,-9:-4,4:9,118:122] (or [-122:-114,-5:-4,4:5,114:122]) are used as pilot tones, and the other 4 tones are used as null tones (for 26-tone RUs and 52-tone RUs) or auxiliary tones for two 106-tone RUs. In the following embodiment, only the implementation process of "using 216 tones with indices [-115:-8,8:115] as a data tone set in a 20 MHz bandwidth" is used as an example for explanation.

[0179] For example, two principles are used to design a tone plan for a DRU. One is to increase the amplification factor as much as possible. That is, for a DRU of any size in any bandwidth, the number of tones carrying signals within any 13 consecutive tones in the DRU is minimized as much as possible (in other words, the tones contained in the DRU are spread out as much as possible). The other is to reuse existing signaling. The relative relationships between RUs must be maintained. That is, a DRU-52 is obtained by splicing two DRU-26s, a DRU 106 contains two DRU-52s, and so on.

[0180] In the design process, for a 20MHz bandwidth, the tones in the central regions of the positive and negative frequency parts are first grouped evenly to increase the amplification factor. In the 20MHz tone plan, the tone indexes included in the 26-tone DRU in the 20MHz bandwidth are shown in the following data rows numbered (1) to (36), including: (1)-115 -79 -43 8 44 80 (2)-114 -78 -42 9 45 81 (3)-113 -77 -41 10 46 82 (4)-112 -76 -40 11 47 83 (5)-111 -75 -39 12 48 84 (6)-110 -74 -38 13 49 85 (7)-109 -73 -37 14 50 86 (8)-108 -72 -36 15 51 87 (9)-107 -71 -35 16 52 88 (10)-106 -70 -34 17 53 89 (11)-105 -69 -33 18 54 90 (12)-104 -68 -32 19 55 91 (13)-103 -67 -31 20 56 92 (14)-102 -66 -30 21 57 93 (15)-101 -65 -29 22 58 94 (16)-100 -64 -28 23 59 95 (17)-99 -63 -27 24 60 96 (18)-98 -62 -26 25 61 97 (19)-97 -61 -25 26 62 98 (20)-96 -60 -24 27 63 99 (21)-95 -59 -23 28 64 100 (22)-94 -58 -22 29 65 101 (23)-93 -57 -21 30 66 102 (24)-92 -56 -20 31 67 103 (25)-91 -55 -19 32 68 104 (26)-90 -54 -18 33 69 105 (27)-89 -53 -17 34 70 106 (28)-88 -52 -16 35 71 107 (29)-87 -51 -15 36 72 108 (30)-86 -50 -14 37 73 109 (31)-85 -49 -13 38 74 110 (32)-84 -48 -12 39 75 111 (33)-83 -47 -11 40 76 112 (34)-82 -46 -10 41 77 113 (35)-81 -45 -9 42 78 114 (36)-80 -44 -8 43 79 115

[0181] Optionally, in the configuration process of the DRU-26, the 24 tones included in each DRU-26 may be called grouped tones (grouped subcarriers), and the other two tones are called ungrouped tones (ungrouped subcarriers). In the configuration process of the DRU-26, a symmetric splicing principle is used to increase the amplification factor, so that the grouped subcarriers of each DRU-26 form an overall conversion relationship. For detailed design, please refer to Table 6, which shows a 26-tone DRU in a 20M bandwidth.

[0182] As shown in Table 6, in the aforementioned rows of data numbered (1) through (36), the tones with row numbers 1, 10, 19, and 28 may be the first DRU-26 and may be designated as DRU26-1, which further includes tones with tone indices −7 and 118. The tones with row numbers 2, 11, 20, and 29 may be the second DRU-26 and may be designated as DRU26-2, which further includes tones with tone indices −6 and 119. By analogy, the tones with row numbers 9, 18, 27, and 36 may be the ninth DRU-26 and may be designated as DRU26-9, which further includes tones with tone indices −118 and 7.

[0183] [Table 6]

[0184] Optionally, the DRU-52 is obtained by symmetrically splicing the DRU-26 shown in Table 6. For detailed design, see Table 7. The grouped subcarriers of the DRU-52 also form an overall transformation relationship.

[0185] [Table 7]

[0186] Optionally, the two DRU-52s included in the DRU-106 are obtained by symmetrically splicing the DRU-52s shown in Table 7. For detailed design, see Table 8. The grouped subcarriers of the DRU-106 also form an overall conversion relationship.

[0187] [Table 8]

[0188] In addition, for other bandwidths (40M, 80M, 160M, and 320M), data tone groups of other bandwidths can be obtained by converting the groups in the 20M bandwidth, and DRUs of various sizes can also be constructed by using the symmetric splicing principle, so that the overall conversion relationship of the grouped subcarriers can be maintained.

[0189] Based on the 20 MHz tone plan used in the above-mentioned standard, it can be understood that an access point may schedule any DRU in the 20 MHz tone plan used in the standard, or may schedule multiple DRUs that do not conflict with each other, and the DRUs are assigned to one or more different stations. Non-conflicting with each other means that there are no identical tones or no overlapping (overlapping). For example, DRU 106 with index 1 (i.e., DRU 106-1) is assigned to one or more stations, DRU 52 with index 2 (i.e., DRU 52-2) is assigned to one or more other stations, DRU 26 with index 4 (i.e., DRU 26-4) is assigned to one or more other stations, and DRU 26 with index 9 (i.e., DRU 26-9) is assigned to one or more other stations. Other embodiments are similar and will not be described in detail again.

[0190] Specifically, one uplink scheduling uses either continuous or discrete RUs. Normally, continuous and discrete RUs are not allocated simultaneously. Therefore, only one resource unit allocation signaling may be required in the scheduling information, provided that the current RU indicates in some way whether it is a continuous or discrete RU. Those skilled in the art will understand that in the above implementation, the existing continuous RU allocation signaling indication field may be reused for DRU allocation, but the meaning of the field may be replaced with an indication for the DRU, such as the indication scheme shown in Table 5 above. In this way, additional signaling overhead is reduced overall, thereby reducing complexity. The DRU allocation signaling may be an uplink RU allocation indication in a trigger frame or another MAC frame (e.g., a Triggered Response Scheduling (TRS) field, etc.).

[0191] As described above, the communication bandwidth between the STA and the AP may include 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. After the STA determines the DRU assigned to the STA based on the DRU indication information included in the trigger frame received in step S101, the STA transmits a TB PPDU on the DRU in step S102. The TB PPDU includes an LTF. The LTF included in the TB PPDU is described below.

[0192] In possible implementations, the bandwidth occupied by the DRU is 20 megahertz (MHz), 40 MHz, 80 MHz, 160 MHz, or 320 MHz. The LTF included in the TB PPDU is determined based on the bandwidth occupied by the DRU.

[0193] Specifically, because different channel bandwidths occupy different tone indices, the PAPR of a wireless signal is associated with the index of the tone carrying the wireless signal. In other words, for different channel bandwidths, the tone plan for the DRU may be different. That is, the number of tones included in each DRU and the position of the tones may be different. The PAPR of an LTF is associated with the index of the tone carrying the LTF and the sequence value of the LTF. In the process of a STA generating and transmitting a TB PPDU, the STA may determine an LTF with a relatively low PAPR within the bandwidth based on the bandwidth occupied by the DRU, thereby allowing the STA to obtain the benefit of a relatively low PAPR in various bandwidth communication scenarios and improve system performance.

[0194] Optionally, the STA and AP may pre-configure (or pre-define in a standard or pre-store) LTFs corresponding to various bandwidths, so that in step S102, the STA generates and transmits a TB PPDU based on the LTF. Accordingly, after the AP receives the TB PPDU in step S102, the AP may perform channel estimation for one or more STAs based on the received TB PPDUs transmitted by one or more STAs and the LFTs included in the TB PPDUs.

[0195] In a possible implementation, the bandwidth occupied by the DRU includes k distributed resource units, each of the k distributed resource units includes x data tones, and the absolute value of the index difference between every two data tones in y data tones of the x data tones is greater than or equal to 2, where k, x, and y are all positive integers and y≦x.

[0196] The indices of the y data tones in different distributed resource units in the k distributed resource units form an overall conversion relationship.

[0197] Optionally, if y data tones in different distributed resource units in the k distributed resource units carry the same LTF sequence, the peak-to-average power ratio PAPR of the y data tones in different distributed resource units in the k distributed resource units is the same.

[0198] Optionally, each of the k distributed resource units further includes z pilot tones, and the number of tones included in each of the k distributed resource units is the sum of x and z.

[0199] Specifically, among the k distributed resource units included in the bandwidth occupied by the DRU, each distributed resource unit includes x data tones. The absolute value of the index difference between any two data tones among y data tones among the x data tones is greater than or equal to 2. This allows for a large spacing between the tones included in each of the k distributed resource units, thereby achieving sufficient discretization of the tones included in the DRU. Therefore, at the same power spectral density, the maximum power amplification factor can be achieved compared to a contiguous RU, thereby improving transmission efficiency.

[0200] In addition, the indices of the y data tones in different distributed resource units in the k distributed resource units form an overall conversion relationship. Therefore, if the y data tones in different distributed resource units in the k distributed resource units carry the same LTF sequence, the peak-to-average power ratios (PAPRs) of the y data tones in different distributed resource units in the k distributed resource units are the same. Therefore, in the process of configuring an LTF corresponding to the bandwidth occupied by the DRU, a sequence set including multiple LTF base sequences with relatively low PAPR characteristics can be determined for the y data tones included in a distributed resource unit in the k distributed resource units, and the LTF corresponding to the y data tones included in another distributed resource unit in the k distributed resource units is determined based on the sequence set, so as to simplify the LTF configuration process.

[0201] Below, the LTF for different bandwidths is explained by using examples.

[0202] In one implementation, if the STA determines that the DRU indication information included in the trigger frame indicates that the bandwidth occupied by the STA's (allocated) DRU is 20 MHz, the following condition is met: If the value of k is 9, then the value of x is 24 and the value of y is 24, or If the value of k is 4, then the value of x is 48 and the value of y is 48, or If the value of k is 2, the value of x is 102 and the value of y is 96.

[0203] Specifically, if the bandwidth occupied by a DRU is 20 MHz, the bandwidth may include 256 tones with a tone spacing of 78.125 kilohertz (kHz). If a 26-tone DRU is used as the smallest DRU, the 256 tones may be divided into nine 26-tone DRUs (i.e., the value of k is 9). In addition, each 26-tone DRU includes 24 data tones, and the spacing between any two of the 24 tones is 2 or greater to improve the discreteness of the tones.

[0204] Optionally, each 26-tone DRU further includes two pilot tones.

[0205] Similarly, if the bandwidth occupied by the DRU is 20 MHz, a 52-tone DRU (i.e., if k is 4, x is 48 and y is 48) and a 106-tone DRU (i.e., if k is 2, x is 102 and y is 96) may be further included.

[0206] Optionally, each 52-tone DRU further includes four pilot tones, and each 106-tone DRU further includes four pilot tones.

[0207] Optionally, the LTF corresponding to the 20 MHz bandwidth includes 256 elements, and the values ​​of the LTF (denoted as the sequence 20 MHz proposal) corresponding to the lowest to highest frequency tones are as follows: {0 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 -1 -1 1 1 1 -1 -1 1 1 0 0 0 0 0} is.

[0208] For example, in a 20M bandwidth, there are a total of two 106-tone DRUs. The two 106-tone DRUs do not form an overall conversion relationship. Therefore, for the same sequence of length 106, the PAPRs of the two 106-tone DRUs are different. However, each of the two 106-tone DRUs contains a 96-tone portion, and the two 96-tone portions form an overall conversion relationship. Therefore, for the same sequence of length 96, the PAPRs of the two 96-tone portions are the same. Each 96-tone portion is formed by splicing two 48-tone portions, and the two 48-tone portions form an overall conversion relationship. For the same sequence of length 48, the PAPRs of the two 48-tone portions are the same. It is easy to understand that the four 48-tone portions included in the two 96-tone portions form an overall conversion relationship. For the same sequence of length 48, the PAPRs of the four 48-tone portions are the same. Each 48-tone portion is formed by splicing two 24-tone portions, and the two 24-tone portions form an overall transfer relationship. For the same sequence of length 24, the PAPR of two 24-tone portions is the same. It is easy to see that all eight 24-tone portions form an overall transfer relationship. For the same sequence of length 24, the PAPR of eight 24-tone portions is the same.

[0209] Therefore, in the 20M bandwidth, the sequence design process of the LTF includes the following processes:

[0210] Step 1: First, a sequence set Seq_24 having a length of 24, which contains 1 and −1 and has a relatively low PAPR when located in the 24-tone portion, is obtained through search.

[0211] Step 2: There are M items in Seq_24 (M is greater than 0 and 2 24 Consider the case where there exists a sequence of M (all integers less than 48) with length 48. 2This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_48 that has a relatively low PAPR when its position is in the 48-tone portion.

[0212] Step 3: N items in Seq_48 (N is greater than 0 and 2 48 Consider the case where there exists a sequence of N (all integers less than 96) with length 96. 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_96 that has a relatively low PAPR when its position is in the 96-tone part.

[0213] Step 4: Q items in Seq_96 (Q is greater than 0 and 2 96 There exists a sequence of 2 (all integers less than 10) whose length is 10. 10 Consider the case where sequences are generated, through splicing, Q*2 sequences of length 106 are generated. 10 sequences may be obtained. For the first 106-tone DRU, a sequence S106-1 having the lowest PAPR and a length of 106 is selected from the first 106-tone DRU. For the second 106-tone DRU, a sequence S106-2 having the lowest PAPR and a length of 106 is selected from the second 106-tone DRU. In this specification, the screening criterion is to minimize the maximum value of the PAPR of the eight DRU-26s, four DRU-52s, and two DRU-106s.

[0214] Step 5: For DRU26-5, consider the case where there are M sequences in Seq_24, and four sequences of length 2 are generated. 2= 4, and 4*M sequences whose length is 26 can be obtained through splicing, and the sequence with the lowest PAPR is selected as S26-5. S106-1 is located on the first 106-tone DRU, S106-2 is located on the second 106-tone DRU, S26-5 is located on the fifth 26-tone DRU, and the remaining positions are padded with zeros to obtain an LTF sequence with a length of 256 for a 20M bandwidth.

[0215] It should be noted that in practical applications, M, N, and Q in the above process can be set to relatively small values, for example, integers equal to or less than 100, 1000, or 10000, to reduce complexity. In addition, if the corresponding LTFs are determined in an exhaustive manner for 256 tones contained in a 20 MHz bandwidth, the magnitude of the computational complexity of the determination process will be at least 2. 256 It can be seen from the above process that this is far beyond the computational capabilities of existing computers and cannot be implemented. However, in the above sequence-related process, when the same LTF sequence is carried between multiple DRUs that form a "global transformation relationship," taking into consideration the feature that the PAPRs of the multiple DRUs are the same, by selecting relatively small values ​​for M, N, and Q, the magnitude of the computational complexity of the above implementation process can be reduced to 2 24 This reduces the amount of calculation and greatly improves the calculation efficiency.

[0216] Also, compared to the EHT-LTF4x sequence, an LTF with 256 elements corresponding to a 20 MHz bandwidth and obtained based on the design process described above can reduce the PAPR by about 2 dB, as shown in Table 9.

[0217] [Table 9]

[0218] In one implementation, if a STA determines that the DRU indication information included in the trigger frame indicates that the bandwidth occupied by the STA's (allocated) DRU is 40 MHz, the following condition is met: If the value of k is 18, then the value of x is 24 and the value of y is 24, or If the value of k is 8, then the value of x is 48 and the value of y is 48, or If the value of k is 4, the value of x is 102 and the value of y is 96.

[0219] Specifically, if the bandwidth occupied by the DRU is 40 MHz, the bandwidth may contain 512 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the minimum DRU, 512 The tones may be divided into 18 (i.e., the value of k is 18) 26-tone DRUs (i.e., each DRU contains 26 tones). In addition, each 26-tone DRU contains 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0220] Optionally, each 26-tone DRU further includes two pilot tones.

[0221] Similarly, if the bandwidth occupied by the DRU is 40 MHz, a 52-tone DRU (i.e., if the value of k is 8, the value of x is 48 and the value of y is 48) and a 106-tone DRU (i.e., if the value of k is 4, the value of x is 102 and the value of y is 96) may be further included.

[0222] Optionally, each 52-tone DRU further includes four pilot tones, and each 106-tone DRU further includes four pilot tones.

[0223] Optionally, the bandwidth occupied by the DRU is 40 MHz, the LTF corresponding to the 40 MHz bandwidth includes 512 elements, and the values ​​of the LTF (denoted as the sequence 40 MHz proposal) corresponding to the tones from lowest frequency to highest frequency are as follows: {0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 -1 -1 -1 1 -1 1 1 1 1 0 0 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 0 0 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1-1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0} is.

[0224] For example, in a 40M bandwidth, there are a total of four 106-tone DRUs. The four 106-tone DRUs do not form an overall conversion relationship. Therefore, for the same sequence of length 106, the PAPRs of the four 106-tone DRUs are different. However, each of the four 106-tone DRUs contains a 96-tone portion, and the four 96-tone portions form an overall conversion relationship. Therefore, for the same sequence of length 96, the PAPRs of the four 96-tone portions are the same. Each 96-tone portion is formed by splicing two 48-tone portions, and the two 48-tone portions form an overall conversion relationship. For the same sequence of length 48, the PAPRs of the two 48-tone portions are the same. It is easy to understand that the eight 48-tone portions included in the four 96-tone portions form an overall conversion relationship. For the same sequence of length 48, the PAPRs of the eight 48-tone portions are the same. Each 48-tone portion is formed by splicing two 24-tone portions, and the two 24-tone portions form an overall transfer relationship. For the same sequence of length 24, the PAPR of the two 24-tone portions is the same. It is easy to see that all 16 24-tone portions form an overall transfer relationship. For the same sequence of length 24, the PAPR of the 16 24-tone portions is the same.

[0225] Therefore, in a 40 MHz bandwidth, the sequence design process of the LTF includes the following processes:

[0226] Step 1: First, obtain a sequence set Seq_24 with a length of 24 through search, which contains 1 and -1 and has a relatively low PAPR when its position is in the 24-tone part. It should be noted that the positions of the 24 tones in 40M are different from those in 20M, and the search needs to be performed again for each bandwidth.

[0227] Step 2: Consider the case where there are M sequences in Seq_24. M are of length 48. 2This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_48 that has a relatively low PAPR when its position is in the 48-tone portion.

[0228] Step 3: Consider the case where there are N sequences in Seq_48. Let N be the length 96. 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_96 that has a relatively low PAPR when its position is in the 96-tone portion.

[0229] Step 4: There are Q sequences in Seq_96, each of length 10. 10 Considering the case where sequences of length 106 are generated, * 2 10 Sequences can be obtained through splicing. For the first 106-tone DRU, a sequence S106-1 having the lowest PAPR and a length of 106 is selected from the first 106-tone DRU. For the second 106-tone DRU, a sequence S106-2 having the lowest PAPR and a length of 106 is selected from the second 106-tone DRU. For the third 106-tone DRU, a sequence S106-3 having the lowest PAPR and a length of 106 is selected from the third 106-tone DRU. For the fourth 106-tone DRU, a sequence S106-4 having the lowest PAPR and a length of 106 is selected from the fourth 106-tone DRU. In this specification, the screening criterion is to minimize the maximum value of the PAPR of 16 DRU-26s, 8 DRU-52s, and 4 DRU-106s.

[0230] Step 5: For DRU26-5 and DRU26-14, consider the case where there are M sequences contained in Seq_24, and 4 sequences of length 2 are generated. 2= 4, and 4*M sequences of length 26 can be obtained through splicing. For DRU26-5, the sequence with the lowest PAPR is selected as S26-5. For DRU26-14, the sequence with the lowest PAPR is selected as S26-14. S106-1 is located on the first 106-tone DRU, S106-2 is located on the second 106-tone DRU, S106-3 is located on the third 106-tone DRU, and S106-4 is located on the fourth 106-tone DRU. S26-5 is located on the fifth 26-tone DRU, and S26-14 is located on the fourteenth 26-tone DRU, and the remaining positions are padded with zeros to obtain an LTF sequence with a length of 512 for a 40M bandwidth.

[0231] It should be noted that in practical applications, M, N, and Q in the above process can be set to relatively small values, for example, integers below 100, 1000, or 10000, to reduce complexity. In addition, the corresponding LTFs are included in the 40 MHz bandwidth. 512 If the tones are determined in an exhaustive manner, the computational complexity of the decision process is at least 2 512 This is far beyond the computational capabilities of existing computers and cannot be implemented, but it can be seen from the above process. However, in the above sequence relationship process, when the same LTF sequence is transmitted between multiple DRUs forming an "overall transformation relationship," the PAPR of the multiple DRUs is the same. Considering this feature, by selecting relatively small values ​​for M, N, and Q, the amount of calculation required for the above implementation process can be reduced to 2 24 This reduces the amount of calculation and greatly improves the calculation efficiency.

[0232] Also, compared to the EHT-LTF4x sequence, an LTF with 512 elements corresponding to a 40 MHz bandwidth and obtained based on the design process described above can reduce the PAPR by about 1 dB, as shown in Table 10.

[0233] [Table 10]

[0234] In one implementation, if a STA determines that the DRU indication information included in the trigger frame indicates that the bandwidth occupied by the STA's (allocated) DRU is 80 MHz, the following conditions are met: If the value of k is 36, then the value of x is 24 and the value of y is 24, or If the value of k is 16, then the value of x is 48 and the value of y is 48, or If k is 8, then x is 102 and y is 96, or If the value of k is 4, the value of x is 234 and the value of y is 192.

[0235] Specifically, if the bandwidth occupied by the DRU is 80 MHz, the bandwidth may contain 1,024 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the minimum DRU, 1024 The tones may be divided into 36 (i.e., the value of k is 36) 26-tone DRUs (i.e., each DRU contains 26 tones). In addition, each 26-tone DRU contains 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0236] Optionally, each 26-tone DRU further includes two pilot tones.

[0237] Similarly, if the bandwidth occupied by the DRU is 80 MHz, a 52-tone DRU (i.e., if k is 16, x is 48 and y is 48), a 106-tone DRU (i.e., if k is 8, x is 102 and y is 96), and a 242-tone DRU (i.e., if k is 4, x is 234 and y is 192) may be further included.

[0238] Optionally, each 52-tone DRU further includes four pilot tones, each 106-tone DRU further includes four pilot tones, and each 242-tone DRU further includes eight pilot tones.

[0239] Optionally, the bandwidth occupied by the DRU is 80 MHz, the LTF corresponding to the 80 MHz bandwidth includes 1,024 elements (denoted as the sequence 80 MHz proposal), and the values ​​of the LTF carried by the tones from lowest frequency to highest frequency are as follows: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 ... 0 0 0 0 0 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 1 - ... 1 -1 1 0 0 0 0 0 -1 -1 -1 -1 1 -1 -1 1 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 1 1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 0 0 0 1 -1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 -1 -1 0 0 -1 -1 -1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 0 0 0 0 0 0 0 0 0 0 0 0} is.

[0240] For example, in an 80M bandwidth, there are a total of four 242-tone DRUs. The four 242-tone DRUs do not form an overall conversion relationship. Therefore, for the same sequence of length 242, the PAPRs of the four 242-tone DRUs are different. However, each of the four 242-tone DRUs contains a 192-tone portion, and the four 192-tone portions form an overall conversion relationship. Therefore, for the same sequence of length 192, the PAPRs of the four 192-tone portions are the same. Each of the four 242-tone DRUs further contains a 24-tone portion, and the four 24-tone portions form an overall conversion relationship. Therefore, for the same sequence of length 24, the PAPRs of the four 24-tone portions are the same. Each 192-tone portion is formed by splicing two 96-tone portions, and the two 96-tone portions form an overall conversion relationship. For the same sequence of length 96, the PAPRs of the two 96-tone portions are the same. It is easy to see that eight 96-tone segments within four 192-tone segments form an overall transfer relationship. For the same sequence of length 96, the PAPR of the eight 96-tone segments is the same. Each 96-tone segment is formed by splicing two 48-tone segments, and the two 48-tone segments form the overall transfer relationship. For the same sequence of length 48, the PAPR of the two 48-tone segments is the same. It is easy to see that sixteen 48-tone segments within eight 96-tone segments form the overall transfer relationship. For the same sequence of length 48, the PAPR of the sixteen 48-tone segments is the same. Each 48-tone segment is formed by splicing two 24-tone segments, and the two 24-tone segments form the overall transfer relationship. For the same sequence of length 24, the PAPR of the two 24-tone segments is the same. It is easy to see that all 32 24-tone segments form the overall transfer relationship. For the same sequence of length 24, the PAPR of the 32 24-tone portions is the same.

[0241] Therefore, in the 80 MHz bandwidth, the sequence design process of the LTF includes the following processes:

[0242] Step 1: First, a sequence set Seq_24 having a length of 24, which contains 1 and −1 and has a relatively low PAPR when its position is in the 24-tone portion, is obtained through search.

[0243] Step 2: Consider that there are M sequences in Seq_24. M has length 48. 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_48 that has a relatively low PAPR when its position is in the 48-tone portion.

[0244] Step 3: Consider that there are N sequences in Seq_48, N of length 96 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_96 that has a relatively low PAPR when its position is in the 96-tone portion.

[0245] Step 4: Consider that there are T sequences in Seq_96. Let T be the length of 192. 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_192 that has a relatively low PAPR when its position is in the 192-tone part.

[0246] Step 5: Considering that there are Q sequences in Seq_192 and M sequences in Seq_24, Q·M sequences of length 216 can be obtained through splicing. For the first 216 tones, select a sequence set Seq_216_1 from the first 216 tones, which has a relatively low PAPR and a length of 216. For the second 216 tones, select a sequence set Seq_216_2 from the second 216 tones, which has a relatively low PAPR and a length of 216. For the third 216 tones, select a sequence set Seq_216_3 from the third 216 tones, which has a relatively low PAPR and a length of 216. For the fourth 216 tones, select a sequence set Seq_216_4 from the fourth 216 tones, which has a length of 216 and a relatively low PAPR.

[0247] Step 6: For DRU242-1, consider the case where there are U sequences included in Seq_216_1 and V sequences of length 26 are generated. U*V sequences of length 242 can be obtained through splicing, and the sequence with the lowest PAPR is obtained through screening and used as S242-1. In this specification, the screening criterion is to minimize the maximum value of PAPR of 36 DRU-26, 16 DRU-52, 8 DRU-106, and 4 DRU-242. Similarly, S242-2, S242-3, and S242-4 can be obtained. S242-1 is located on the first 242-tone DRU, S242-2 is located on the second 242-tone DRU, S242-3 is located on the third 242-tone DRU, S242-4 is located on the fourth 242-tone DRU, and the remaining positions are padded with zeros to obtain an LTF sequence with a length of 1024 for an 80M bandwidth.

[0248] It should be noted that in practical applications, M, N, Q, U, and V in the above process may be set to relatively small values, for example, integers equal to or less than 100, 1000, or 10000, in order to reduce complexity. In addition, if the corresponding LTFs are determined in an exhaustive manner for 1,024 tones contained in an 80 MHz bandwidth, the magnitude of the computational complexity of the determination process will be at least 2. 1024 It can be seen from the above process that this is far beyond the computational capabilities of existing computers and cannot be implemented. However, in the above sequence relationship process, when the same LTF sequence is carried between multiple DRUs forming an "overall transformation relationship," taking into consideration the feature that the PAPRs of the multiple DRUs are the same, by selecting relatively small values ​​for M, N, Q, U, and V, the magnitude of the computational complexity of the above implementation process can be reduced to 2 24 This reduces the amount of calculation and greatly improves the calculation efficiency.

[0249] Also, compared to the EHT-LTF4x sequence, an LTF with 1,024 elements corresponding to an 80 MHz bandwidth and obtained based on the design process described above can reduce the PAPR by about 2 dB, as shown in Table 11.

[0250] [Table 11]

[0251] In one implementation, if a STA determines that the DRU indication information included in the trigger frame indicates that the bandwidth occupied by the STA's (allocated) DRU is 160 MHz, the following conditions are met: If the value of k is 72, then the value of x is 24 and the value of y is 24, or If the value of k is 32, then the value of x is 48 and the value of y is 48, or If k is 16, then x is 102 and y is 96, or If k is 8, then x is 234 and y is 192, or If the value of k is 4, the value of x is 468 and the value of y is 384.

[0252] Specifically, if the bandwidth occupied by a DRU is 160 MHz, the bandwidth may include 2,048 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the smallest DRU, the 2,048 tones may be divided into 72 (i.e., the value of k is 72) 26-tone DRUs (i.e., each DRU includes 26 tones). In addition, each 26-tone DRU includes 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0253] Optionally, each 26-tone DRU further includes two pilot tones.

[0254] Similarly, if the bandwidth occupied by the DRU is 160 MHz, a 52-tone DRU (i.e., when k is 32, x is 48 and y is 48), a 106-tone DRU (i.e., when k is 16, x is 102 and y is 96), a 242-tone DRU (i.e., when k is 8, x is 234 and y is 192), and a 484-tone DRU (i.e., when k is 4, x is 468 and y is 384) may be further included.

[0255] Optionally, each 52-tone DRU further includes 4 pilot tones, each 106-tone DRU further includes 4 pilot tones, each 242-tone DRU further includes 8 pilot tones, and each 484-tone DRU further includes 16 pilot tones.

[0256] Optionally, the bandwidth occupied by the DRU is 160 MHz, and the corresponding LTF sequence is denoted as proposed sequence 160 MHz. For the 80 MHz portion with lower frequencies within 160 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are as follows: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 1 - ... 1 1 -1 1 0 -1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 ... -1 -1 1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 0 0 0 0 0 -1 1 1 -1 1 1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 1 -1 0 0 1 1 -1 -1 1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 -1 1 1 1 1 0 0 0 0 0 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 0 0 0 0 0 0 0 0 0 0 0 0} is.

[0257] For the 80 MHz portion with higher frequencies within 160 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to highest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 1 0 0 0 0 0 1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 0 0 1 1 -1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 0 0 0 0 0 -1 -1 -1 1 -1 1 1 -1 0 0 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 0 0 0 0 0 0 0 -1 -1 1 -1 1 -1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 0 0 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0} is.

[0258] For example, in a 160M bandwidth, there are a total of four 484-tone DRUs. The four 484-tone DRUs do not form an overall conversion relationship. Therefore, for the same sequence of length 484, the PAPRs of the four 484-tone DRUs are different. However, each of the four 484-tone DRUs contains a 384-tone portion, and the four 384-tone portions form an overall conversion relationship. Therefore, for the same sequence of length 384, the PAPRs of the four 384-tone portions are the same. Each of the four 484-tone DRUs further contains a 48-tone portion, and the four 48-tone portions form an overall conversion relationship. Therefore, for the same sequence of length 48, the PAPRs of the four 48-tone portions are the same. Each 384-tone portion is formed by splicing two 192-tone portions, and the two 192-tone portions form an overall conversion relationship. For the same sequence of length 192, the PAPRs of the two 192-tone portions are the same. It is easy to see that eight 192-tone segments within four 384-tone segments form an overall transfer relationship. For the same sequence of length 192, the PAPR of eight 192-tone segments is the same. Each 192-tone segment is formed by splicing two 96-tone segments, and the two 96-tone segments form the overall transfer relationship. For the same sequence of length 96, the PAPR of two 96-tone segments is the same. It is easy to see that sixteen 96-tone segments within eight 192-tone segments form an overall transfer relationship. For the same sequence of length 96, the PAPR of sixteen 96-tone segments is the same. Each 96-tone segment is formed by splicing two 48-tone segments, and the two 48-tone segments form the overall transfer relationship. For the same sequence of length 48, the PAPR of two 48-tone segments is the same. It is easy to see that thirty-two 48-tone segments within sixteen 96-tone segments form an overall transfer relationship. For the same sequence of length 48, the PAPR of the 32 48-tone portions is the same.Each 48-tone portion is formed by splicing two 24-tone portions, and the two 24-tone portions form an overall transfer relationship. For the same sequence of length 24, the PAPR of two 24-tone portions is the same. It is easy to see that all 64 24-tone portions form an overall transfer relationship. For the same sequence of length 24, the PAPR of all 64 24-tone portions is the same.

[0259] therefore, 160 In MHz bandwidth, the sequence design process of LTF includes the following processes:

[0260] Step 1: First, a sequence set Seq_24 having a length of 24, which contains 1 and −1 and has a relatively low PAPR when located in the 24-tone portion, is obtained through search.

[0261] Step 2: Consider that there are M sequences in Seq_24. M has length 48. 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_48 that has a relatively low PAPR when its position is in the 48-tone portion.

[0262] Step 3: Consider that there are N sequences in Seq_48, N of length 96 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_96 that has a relatively low PAPR when its position is in the 96-tone portion.

[0263] Step 4: Consider that there are T sequences in Seq_96. Let T be the length of 192. 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_192 that has a relatively low PAPR when its position is in the 192-tone part.

[0264] Step 5: Considering that there are R sequences in Seq_192, we find R, which has length 384. 2 This sequence can be obtained by splicing any two sequences, and a sequence set Seq_384 is selected that has a relatively low PAPR when its position is in the 384-tone portion.

[0265] Step 6: Considering that there are Q sequences in Seq_384 and N sequences in Seq_48, Q·N sequences of length 432 can be obtained through splicing. For the first 432 tones, select a sequence set Seq_432_1 from the first 432 tones, which has a relatively low PAPR and a length of 432. For the second 432 tones, select a sequence set Seq_432_2 from the second 432 tones, which has a relatively low PAPR and a length of 432. For the third 432 tones, select a sequence set Seq_432_3 from the third 432 tones, which has a relatively low PAPR and a length of 432. For the fourth 432 tones, select a sequence set Seq_432_4 from the fourth 432 tones, which has a length of 432 and a relatively low PAPR.

[0266] Step 7: For DRU484-1, consider the case where A sequences included in Seq_432_1 exist and B sequences with a length of 52 are generated. A*B sequences with a length of 484 can be obtained through splicing, and the sequence with the lowest PAPR is obtained through screening and used as S484-1. In this specification, the screening criterion is to minimize the maximum value of PAPR of 72 DRU-26, 32 DRU-52, 16 DRU-106, 8 DRU-242, and 4 DRU-484. Similarly, S484-2, S484-3, and S484-4 can be obtained. S484-1 is located on the first 484-tone DRU, S484-2 is located on the second 484-tone DRU, S484-3 is located on the third 484-tone DRU, S484-4 is located on the fourth 484-tone DRU, and the remaining positions are padded with zeros to obtain an LTF sequence with a length of 2048 for a 160M bandwidth.

[0267] It should be noted that in practical applications, M, N, Q, T, R, A, and B in the above process may be set to relatively small values, for example, integers equal to or less than 100, 1000, or 10000, in order to reduce complexity. In addition, if the corresponding LTFs are determined in an exhaustive manner for the 2,048 tones contained in the 160 MHz bandwidth, the magnitude of the computational complexity of the determination process will be at least 2. 2048 It can be seen from the above process that this is far beyond the computational capabilities of existing computers and cannot be implemented. However, in the above sequence relationship process, when the same LTF sequence is carried between multiple DRUs forming an "overall conversion relationship," taking into consideration the feature that the PAPRs of the multiple DRUs are the same, by selecting relatively small values ​​for M, N, Q, T, R, A, and B, the magnitude of the computational complexity of the above implementation process can be reduced to 2 24 This reduces the amount of calculation and greatly improves the calculation efficiency.

[0268] Also, compared to the EHT-LTF4x sequence, an LTF with 2,048 elements corresponding to a 160 MHz bandwidth and obtained based on the design process described above can reduce the PAPR by approximately 2 dB, as shown in Table 12.

[0269] [Table 12]

[0270] In one implementation, if a STA determines that the DRU indication information included in the trigger frame indicates that the bandwidth occupied by the STA's (allocated) DRU is 320 MHz, the following conditions are met: If the value of k is 144, then the value of x is 24 and the value of y is 24, or If k is 64, then x is 48 and y is 48, or If k is 32, then x is 102 and y is 96, or If k is 16, then x is 234 and y is 192, or If k is 8, then x is 468 and y is 384, or If the value of k is 4, the value of x is 980 and the value of y is 768.

[0271] Specifically, if the bandwidth occupied by a DRU is 320 MHz, the bandwidth may include 4,096 tones with a tone spacing of 78.125 kHz. If a 26-tone DRU is used as the smallest DRU, the 4,096 tones may be divided into 144 (i.e., the value of k is 144) 26-tone DRUs (i.e., each DRU includes 26 tones). In addition, each 26-tone DRU includes 24 data tones, and the spacing between any two of the 24 tones is 2 or more to improve the discreteness of the tones.

[0272] Optionally, each 26-tone DRU further includes two pilot tones.

[0273] Similarly, if the bandwidth occupied by the DRU is 320 MHz, then there are a 52-tone DRU (i.e., when k is 64, x is 48 and y is 48), a 106-tone DRU (i.e., when k is 32, x is 102 and y is 96), a 242-tone DRU (i.e., when k is 16, x is 234 and y is 192), a 484-tone DRU (i.e., when k is 8, x is 468 and y is 384), and a 996-tone DRU (i.e., when k is 8, x is 980 and y is 768). )but It may further include:

[0274] Optionally, each 52-tone DRU further includes four pilot tones, each 106-tone DRU further includes four pilot tones, each 242-tone DRU further includes eight pilot tones, each 484-tone DRU further includes 16 pilot tones, and each 996-tone DRU further includes 16 pilot tones.

[0275] Optionally, the bandwidth occupied by the DRU is 320 MHz, and the corresponding LTF is denoted as the sequence 320 MHz proposal. For the 80 MHz portion with the lowest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest frequency to lowest frequency are as follows: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 1 1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 1 1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 1 1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 ... -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0} is.

[0276] For the 80 MHz portion with the second lowest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest frequency to lowest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 1 1 -1 -1 -1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 0 0 0 0 0 -1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0} is.

[0277] For the 80 MHz portion with the second highest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to lowest frequency are: {0 0 0 0 0 0 0 0 0 0 0 0 -1 1 -1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 ... -1 -1 -1 1 1 1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 1 1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 1 1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 -1 1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 0 0 0 0 0 0 0 0 0 0 0} is.

[0278] For an 80 MHz portion with a highest frequency within 320 MHz, the corresponding LTF contains 1,024 elements, and the values ​​of the LTF carried by the tones from lowest to lowest frequency are: {0 0 0 0 0 0 0 0 0 0 0 -1 1 1 1 1 -1 1 1 1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 1 1 1 - ... -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 -1 1 -1 1 -1 1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 1 -1 1 1 1 1 -1 1 1 1 -1 -1 -1 1 -1 1 -1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 1 1 -1 1 1 1 1 1 1 1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 1 1 -1 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 ...0 0 0 0 0 0 0 0 0 0 0} is.

[0279] For example, in a 320M bandwidth, there are a total of four 996-tone DRUs. The four 996-tone DRUs do not form an overall conversion relationship. Therefore, for the same sequence of length 996, the PAPRs of the four 996-tone DRUs are different. However, each of the four 996-tone DRUs contains a 768-tone portion, and the four 768-tone portions form an overall conversion relationship. Therefore, for the same sequence of length 768, the PAPRs of the four 768-tone portions are the same. Each 768-tone portion is formed by splicing two 384-tone portions, and the two 384-tone portions form an overall conversion relationship. For the same sequence of length 384, the PAPRs of the two 384-tone portions are the same. It is easy to understand that the eight 384-tone portions included in the four 768-tone portions form an overall conversion relationship. For the same sequence of length 384, the PAPRs of the eight 384-tone portions are the same. Each 384-tone portion is formed by splicing two 192-tone portions, and the two 192-tone portions form an overall transfer relationship. For the same sequence of length 192, the PAPR of the two 192-tone portions is the same. It is easy to see that the 16 192-tone portions contained in the eight 384-tone portions form an overall transfer relationship. For the same sequence of length 192, the PAPR of the 16 192-tone portions is the same. For the same sequence of length 192, the PAPR of the 16 192-tone portions is the same. Each 192-tone portion is formed by splicing two 96-tone portions, and the two 96-tone portions form an overall transfer relationship. For the same sequence of length 96, the PAPR of the two 96-tone portions is the same. It is easy to see that the 32 96-tone portions contained in the 16 192-tone portions form an overall transfer relationship. For the same sequence of length 96, the PAPR of the 32 96-tone portions is the same. Each 96-tone portion is formed by splicing two 48-tone portions, and the two 48-tone portions form an overall transfer relationship: for the same sequence of length 48, the PAPR of the two 48-tone portions is the same.It is easy to see that 64 of the 48-tone segments within 32 of the 96-tone segments form an overall transfer relationship. For the same sequence of length 48, the PAPR of all 64 of the 48-tone segments is the same. Each 48-tone segment is formed by splicing two 24-tone segments, and the two 24-tone segments form an overall transfer relationship. For the same sequence of length 24, the PAPR of all two 24-tone segments is the same. It is easy to see that all 128 of the 24-tone segments form an overall transfer relationship. For the same sequence of length 24, the PAPR of all 128 of the 24-tone segments is the same.

[0280] therefore, 320 In MHz bandwidth, the sequence design process of LTF includes the following processes:

[0281] Step 1: First, a sequence set Seq_24 having a length of 24, which contains 1 and −1 and has a relatively low PAPR when located in the 24-tone portion, is obtained through search.

[0282] Step 2: Consider that there are M sequences in Seq_24. M has length 48. 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_48 that has a relatively low PAPR when its position is in the 48-tone portion.

[0283] Step 3: Consider that there are N sequences in Seq_48, N of length 96 2 This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_96 that has a relatively low PAPR when its position is in the 96-tone portion.

[0284] Step 4: Consider that there are T sequences in Seq_96. Let T be the length of 192. 2This sequence can be obtained by splicing any two sequences, and we select a sequence set Seq_192 that has a relatively low PAPR when its position is in the 192-tone part.

[0285] Step 5: Considering that there are R sequences in Seq_192, we find R, which has length 384. 2 This sequence can be obtained by splicing any two sequences, and a sequence set Seq_384 is selected that has a relatively low PAPR when its position is in the 384-tone portion.

[0286] Step 6: Considering that there are W sequences in Seq_384, we find W, which has length 768. 2 This sequence can be obtained by splicing any two sequences, and a sequence set Seq_768 is selected that has a relatively low PAPR when its position is in the 768-tone portion.

[0287] Step 7: Considering that there are A sequences in Seq_768 and T sequences in Seq_96, the length is 864. A T sequences can be obtained through splicing. For the first 864 tones, a sequence set Seq_864_1 having a relatively low PAPR and a length of 864 is selected from the first 864 tones. For the second 864 tones, a sequence set Seq_864_2 having a relatively low PAPR and a length of 864 is selected from the second 864 tones. For the third 864 tones, a sequence set Seq_864_3 having a relatively low PAPR and a length of 864 is selected from the third 864 tones. For the fourth 864 tones, a sequence set Seq_864_4 having a length of 864 and a relatively low PAPR is selected from the fourth 864 tones.

[0288] Step 8: For DRU996-1, consider the case where Z sequences included in Seq_864_1 exist and B sequences of length 132 are generated. Z*B sequences of length 996 can be obtained through splicing, and the sequence with the lowest PAPR is obtained through screening and used as S996-1. In this specification, the screening criterion is to minimize the maximum PAPR of 144 DRU-26, 64 DRU-52, 32 DRU-106, 16 DRU-242, 8 DRU-484, and 4 DRU-996. Similarly, S996-2, S996-3, and S996-4 can be obtained.

[0289] S996-1 is located on the first 996-tone DRU, S996-2 is located on the second 996-tone DRU, S996-3 is located on the third 996-tone DRU, S996-4 is located on the fourth 996-tone DRU, and the remaining positions are padded with zeros to obtain an LTF sequence with a length of 4096 for a 320M bandwidth.

[0290] It should be noted that in practical applications, M, N, Q, T, R, A, B, W, and Z in the above process can be set to relatively small values, for example, integers below 100, 1000, or 10000, to reduce complexity. In addition, the corresponding LTF 3 When the 4,096 tones contained in a 20 MHz bandwidth are determined in an exhaustive manner, the computational complexity of the decision process is at least 2 4096 It can be seen from the above process that this is far beyond the computational capabilities of existing computers and cannot be implemented. However, in the above sequence relationship process, when the same LTF sequence is carried between multiple DRUs forming an "overall transformation relationship," taking into consideration the feature that the PAPRs of the multiple DRUs are the same, by selecting relatively small values ​​for M, N, Q, T, R, A, B, W, and Z, the magnitude of the computational complexity of the above implementation process can be reduced to 2 24This reduces the amount of calculation and greatly improves the calculation efficiency.

[0291] Also, compared to the EHT-LTF4x sequence, 320 An LTF with 4,096 elements corresponding to a MHz bandwidth and obtained based on the design process described above can reduce the PAPR by approximately 2 to 4 dB, as shown in Table 13.

[0292] [Table 13]

[0293] In a possible implementation, it can be seen from the LTF provided in any one of the above-mentioned embodiments that in the LTF included in the TB PPDU, the value in the x data tones of each of the k distributed resource units is 1 or −1. In other words, the LTF included in the TB PPDU includes a portion with a value of 0 and a portion with a value that is not 0 (i.e., 1 or −1).

[0294] Optionally, if a tone is included outside any distributed resource unit or is not allocated to any distributed resource unit, the value of the LTF corresponding to the tone is 0. For example, in the above-mentioned LTF sequence, a tone occupied by an LTF with a value of 0 is a tone that does not belong to any distributed resource unit.

[0295] Optionally, if a tone is included in or allocated to any distributed resource unit, the value of the LTF corresponding to the tone is not 0 (i.e., 1 or −1). For example, in the above-mentioned LTF sequence, a tone occupied by an LTF with a value not 0 (i.e., 1 or −1) is a tone that belongs to one or more distributed resource units.

[0296] While the present application has been described above in terms of a method, the present application will now be further described in terms of an apparatus.

[0297] 9 is a schematic diagram illustrating a communication device 900 according to an embodiment of the present application. The communication device 900 includes: a transmitting unit 901 and a receiving unit 902.

[0298] In one implementation, the communication device 900 may be specifically applied to WLAN communication. This device may be an STA, or may be some components (such as a processor, a chip, or a chip system) in the STA, and is configured to implement the communication method in the embodiment shown in Figure 8. Accordingly, the sending unit 901 and the receiving unit 902 include the following processes: The receiving unit 902 is configured to receive a trigger frame, where the trigger frame includes DRU indication information, and the DRU indication information indicates a DRU used by the STA to transmit a TB PPDU; The transmitting unit 901 is configured to transmit a trigger-based physical layer protocol data unit (TB PPDU) on the DRU, where the TB PPDU includes a long training field (LFT). ( LTF ) Includes:

[0299] In one implementation, the communication device 900 may be specifically applied to WLAN communication. The device may be an AP, or may be some components (such as a processor, a chip, or a chip system) in the AP, and is configured to implement the communication method in the embodiment shown in Figure 8. Accordingly, the sending unit 901 and the receiving unit 902 include the following processes: The sending unit 901 is configured to send a trigger frame, where the trigger frame includes DRU indication information, and the DRU indication information indicates a DRU used by the STA to send a TB PPDU; The receiving unit 902 is configured to receive a trigger-based physical layer protocol data unit (TB PPDU) on the DRU, where the TB PPDU includes a long training field (LFT). ( LTF) Includes:

[0300] A possible implementation would be The bandwidth occupied by the DRU is 20 MHz. ( MHz ) , 40 MHz, 80 MHz, 160 MHz, or 320 MHz, and the LTF included in the TB PPDU is determined based on the bandwidth occupied by the DRU.

[0301] A possible implementation would be The bandwidth occupied by the DRU includes k distributed resource units, each of which includes x data tones, and the absolute value of the index difference between every two data tones among y data tones among the x data tones is greater than or equal to 2, where k, x, and y are all positive integers and y≦x.

[0302] The indices of the y data tones in different distributed resource units in the k distributed resource units form an overall conversion relationship.

[0303] Optionally, if y data tones in different distributed resource units in the k distributed resource units carry the same LTF sequence, the peak-to-average power ratio PAPR of the y data tones in different distributed resource units in the k distributed resource units is the same.

[0304] In a possible implementation, the bandwidth occupied by the DRU is 20 MHz, If the value of k is 9, then the value of x is 24 and the value of y is 24, or If the value of k is 4, then the value of x is 48 and the value of y is 48, or If the value of k is 2, the value of x is 102 and the value of y is 96.

[0305] In a possible implementation, the bandwidth occupied by the DRU is 40 MHz, If the value of k is 18, then the value of x is 24 and the value of y is 24, or If the value of k is 8, then the value of x is 48 and the value of y is 48, or If the value of k is 4, the value of x is 102 and the value of y is 96.

[0306] In a possible implementation, the bandwidth occupied by the DRU is 80 MHz, If the value of k is 36, then the value of x is 24 and the value of y is 24, or If the value of k is 16, then the value of x is 48 and the value of y is 48, or If k is 8, then x is 102 and y is 96, or If the value of k is 4, the value of x is 234 and the value of y is 192.

[0307] In a possible implementation, the bandwidth occupied by the DRU is 160 MHz, If the value of k is 72, then the value of x is 24 and the value of y is 24, or If the value of k is 32, then the value of x is 48 and the value of y is 48, or If k is 16, then x is 102 and y is 96, or If k is 8, then x is 234 and y is 192, or If the value of k is 4, the value of x is 468 and the value of y is 384.

[0308] In a possible implementation, the bandwidth occupied by the DRU is 320 MHz, If the value of k is 144, then the value of x is 24 and the value of y is 24, or If k is 64, then x is 48 and y is 48, or If k is 32, then x is 102 and y is 96, or If k is 16, then x is 234 and y is 192, or If k is 8, then x is 468 and y is 384, or If the value of k is 4, the value of x is 980 and the value of y is 768.

[0309] In a possible implementation, the DRU indication information includes at least one of the following: Resource unit RU allocation subfield, uplink bandwidth subfield, uplink bandwidth extension subfield, or primary / secondary 160 subfield.

[0310] A possible implementation would be In the LTF included in the TB PPDU, the value of the x data tones in each of the k distributed resource units is 1 or −1.

[0311] It should be noted that the communication device 900 can be further configured to perform other embodiments described above and implement corresponding beneficial effects. For details, please refer to the descriptions in the above embodiments. The details will not be described again in this specification.

[0312] 10 is a schematic diagram illustrating the structure of a communication device 1000 according to an embodiment of the present application. The communication device 1000 includes: a processor 1001 and a transceiver 1002.

[0313] The communication device 1000 may be a wireless frame transmitting device, a wireless frame receiving device, or a chip within the wireless frame transmitting device or the wireless frame receiving device.

[0314] 10 shows only the main components within the communication device 1000. In addition to the processor 1001 and the transceiver 1002, the communication device may further include a memory 1003 and input / output devices (not shown).

[0315] The processor 1001 is mainly configured to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs. The memory 1003 is mainly configured to store software programs and data. The transceiver 1002 may include a radio frequency circuit and an antenna. The radio frequency circuit is mainly configured to convert between baseband signals and radio frequency signals and process the radio frequency signals. The antenna is mainly configured to transmit and receive radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, display, or keyboard, is mainly configured to receive data input by a user and output data to a user.

[0316] The processor 1001, the transceiver 1002, and the memory 1003 may be connected via a communication bus.

[0317] After the communication device is powered on, the processor 1001 can read the software program in the memory 1003, 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 1001 performs baseband processing on the data to be transmitted and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal in the form of electromagnetic waves by using an antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal by using an antenna, converts the radio frequency signal to a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal to data and processes the data.

[0318] In any one of the above designs, the processor 1001 may include a communication interface for implementing transmitting and receiving functions. For example, the communication interface may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, the interface, or the interface circuit configured to implement the transmitting and receiving functions may be separate or integrated with each other. The transceiver circuit, the interface, or the interface circuit may be configured to read and write code / data. Alternatively, the transceiver circuit, the interface, or the interface circuit may be configured to transmit or forward signals.

[0319] In any one of the above designs, the processor 1001 may store instructions, which may be computer programs. The computer programs execute on the processor 1001, thereby enabling the communication device 1000 to perform the method described in any one of the above embodiments. The computer programs may be retained on the processor 1001, in which case the processor 1001 may be implemented in hardware.

[0320] In one implementation, the communication device 1000 may include a circuit. This circuit may implement the transmitting function, receiving function, or communication function of any one of the above-described embodiments. The processor and communication interface described herein may be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed-signal IC, an application-specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, or the like. The processor and communication interface may be fabricated using various IC technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), and gallium arsenide (GaAs).

[0321] In another implementation, the radio frequency circuitry and antenna may be located independently of the processor for baseband processing, for example, in a distributed scenario, the radio frequency circuitry and antenna may be located independently and remotely from the communication device.

[0322] The communication device may be a standalone device or may be part of a larger device. For example, the communication device may be: (1) A standalone integrated circuit IC, chip, or chip system or subsystem; (2) a set having one or more ICs, optionally the IC set may alternatively include a storage component configured to store data and instructions; (3) ASIC, e.g., modem, (4) a module that can be embedded in another device; (5) A receiver, intelligent terminal, wireless device, handset, mobile unit, in-vehicle device, cloud device, artificial intelligence device, or the like; or (6) Other things.

[0323] Furthermore, the processor 1001 may be configured to perform, for example, but not limited to, baseband-related processing, and the transceiver 1002 may be configured to perform, for example, but not limited to, radio frequency transmission and reception. The above-mentioned components may be separately disposed on independent chips, or at least some or all of the components may be disposed on the same chip. For example, the processor may be further divided into an analog baseband processor and a digital baseband processor. The analog baseband processor and the transceiver may be integrated on the same chip, and the digital baseband processor may be disposed on a separate chip. With the continuous development of integrated circuit technology, the number of components that can be integrated on a single chip is increasing. For example, a digital baseband processor and multiple application processors (such as, but not limited to, a graphics processing unit and a multimedia processor) may be integrated on a single chip. This chip may be referred to as a system on chip. Whether all components are separately disposed on different chips or integrated and disposed on one or more chips typically depends on the specific requirements of the product design. The embodiments of the present application do not impose any limitations on the specific implementation of the components described above.

[0324] An embodiment of the present application further provides a computer-readable storage medium, which stores computer program code, and when the processor executes the computer program code, the electronic device performs the method according to any one of the embodiments.

[0325] An embodiment of the present application further provides a computer program product, which, when executed on a computer, enables the computer to perform the method in any one of the above-mentioned embodiments.

[0326] An embodiment of the present application further provides a communication device, which may exist in the form of a chip product, and the structure of the device includes a processor and an interface circuit, which is configured to communicate with another device via a receiving circuit, so that the device performs the method in any one of the above-mentioned embodiments.

[0327] An embodiment of the present application further provides a WLAN communication system, including a STA and an AP, wherein the STA and the AP can perform the method in any one of the above-mentioned embodiments.

[0328] The methods or algorithmic procedures described in connection with the contents disclosed in this application may be implemented by hardware or by a processor executing software instructions. The software instructions may include corresponding software modules. The software modules may be stored in a random access memory (RAM), flash memory, erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, a hard disk, a removable hard disk, a compact disk read-only memory (CD-ROM), or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such that the processor can read information from or write information to the storage medium. Indeed, the storage medium may be a component of the processor. The processor and the storage medium may reside in an ASIC.

[0329] Those skilled in the art will recognize that the functions described in this application, in one or more examples above, can be implemented by hardware, software, firmware, or any combination thereof. If these functions are implemented by software, the functions described above may be stored on or transmitted as one or more instructions or code in a computer-readable medium. Computer-readable media include computer-readable storage media and communication media, and communication media include any medium that allows a computer program to be transmitted from one place to another. Storage media may be any available medium that can be accessed by a general-purpose computer or a special-purpose computer.

[0330] Although the present application is described with reference to embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by studying the accompanying drawings, the disclosed content, and the appended claims. In the claims, "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit may implement several functions recited in the claims. Although some measures are recited in mutually different dependent claims, this does not mean that these measures cannot be combined to produce better effects.

[0331] The objectives, technical solutions, and beneficial effects of the present application will be further described in detail in the above-mentioned specific implementations. It should be understood that the above description is only a specific implementation of the present application, but is not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, or improvements made based on the technical solutions of the present application shall fall within the protection scope of the present application.

Claims

1. 1. A communication method comprising: receiving, by a station (STA), a trigger frame, the trigger frame including distributed resource unit (DRU) indication information, the DRU indication information indicating a DRU to be used by the STA to transmit a trigger-based physical layer protocol data unit (TB PPDU); transmitting, by the STA, the TB PPDU on the DRU, wherein the TB PPDU includes a long training field (LTF); Equipped with the bandwidth occupied by the DRU includes k distributed resource units, each of the k distributed resource units includes x data tones, the absolute value of an index difference between every two data tones among y data tones within the x data tones is greater than or equal to 2, k, x, and y are all positive integers, and y≦x; Indices of y data tones in different distributed resource units among the k distributed resource units form an overall conversion relationship, and the overall conversion relationship refers to generating a tone plan for the DRU, including discretization corresponding to the spacing of the data tones, by evenly grouping the data tones included in the bandwidth occupied by the DRU through splicing of the data tones across the entire bandwidth based on a symmetric splicing principle relative to the center frequency of the bandwidth occupied by the DRU. Communication method.

2. The bandwidth occupied by the DRU is 20 megahertz (MHz), 40 MHz, 80 MHz, 160 MHz, or 320 MHz, and the LTF included in the TB PPDU is determined based on the bandwidth occupied by the DRU. The method of claim 1.

3. the bandwidth occupied by the DRU is 20 MHz; If the value of k is 9, then the value of x is 24 and the value of y is 24; or If the value of k is 4, then the value of x is 48 and the value of y is 48; or If the value of k is 2, the value of x is 102 and the value of y is 96. The method of claim 1.

4. the bandwidth occupied by the DRU is 40 MHz; If the value of k is 18, then the value of x is 24 and the value of y is 24; or If the value of k is 8, then the value of x is 48 and the value of y is 48; or If the value of k is 4, the value of x is 102 and the value of y is 96. The method of claim 1.

5. the bandwidth occupied by the DRU is 80 MHz; If the value of k is 36, then the value of x is 24 and the value of y is 24; or If the value of k is 16, then the value of x is 48 and the value of y is 48; or If the value of k is 8, then the value of x is 102 and the value of y is 96; or If the value of k is 4, the value of x is 234 and the value of y is 192. The method of claim 1.

6. the bandwidth occupied by the DRU is 160 MHz; If the value of k is 72, then the value of x is 24 and the value of y is 24; or If the value of k is 32, then the value of x is 48 and the value of y is 48; or If the value of k is 16, then the value of x is 102 and the value of y is 96, or If the value of k is 8, then the value of x is 234 and the value of y is 192; or If the value of k is 4, the value of x is 468 and the value of y is 384. The method of claim 1.

7. the bandwidth occupied by the DRU is 320 MHz; If the value of k is 144, then the value of x is 24 and the value of y is 24; or If the value of k is 64, then the value of x is 48 and the value of y is 48, or If the value of k is 32, then the value of x is 102 and the value of y is 96, or If the value of k is 16, then the value of x is 234 and the value of y is 192; or If the value of k is 8, then the value of x is 468 and the value of y is 384; or If the value of k is 4, the value of x is 980 and the value of y is 768. The method of claim 1.

8. The DRU instruction information is Resource Unit (RU) Allocation subfield, Uplink Bandwidth subfield, Uplink Bandwidth Extension subfield, or Primary / Secondary 160 subfield The method of claim 1 , comprising at least one of:

9. In the LTF included in the TB PPDU, the value of the x data tones of each of the k distributed resource units is 1 or −1. The method of claim 1.

10. 1. A communication method comprising: transmitting, by an access point (AP), a trigger frame, the trigger frame including distributed resource unit (DRU) indication information, the DRU indication information indicating a DRU to be used by a station (STA) to transmit a trigger-based physical layer protocol data unit (TB PPDU); receiving, by the AP on the DRU, the TB PPDU transmitted by the STA, the TB PPDU including a long training field (LTF); Equipped with the bandwidth occupied by the DRU includes k distributed resource units, each of the k distributed resource units includes x data tones, the absolute value of an index difference between every two data tones among y data tones within the x data tones is greater than or equal to 2, k, x, and y are all positive integers, and y≦x; Indices of y data tones in different distributed resource units among the k distributed resource units form an overall conversion relationship, and the overall conversion relationship refers to generating a tone plan for the DRU, including discretization corresponding to the spacing of the data tones, by evenly grouping the data tones included in the bandwidth occupied by the DRU through splicing of the data tones across the entire bandwidth based on a symmetric splicing principle relative to the center frequency of the bandwidth occupied by the DRU. Communication method.

11. The bandwidth occupied by the DRU is 20 megahertz (MHz), 40 MHz, 80 MHz, 160 MHz, or 320 MHz, and the LTF included in the TB PPDU is determined based on the bandwidth occupied by the DRU. The method of claim 10.

12. the bandwidth occupied by the DRU is 20 MHz; If the value of k is 9, then the value of x is 24 and the value of y is 24; or If the value of k is 4, then the value of x is 48 and the value of y is 48; or If the value of k is 2, the value of x is 102 and the value of y is 96. The method of claim 10.

13. the bandwidth occupied by the DRU is 40 MHz; If the value of k is 18, then the value of x is 24 and the value of y is 24; or If the value of k is 8, then the value of x is 48 and the value of y is 48; or If the value of k is 4, the value of x is 102 and the value of y is 96. The method of claim 10.

14. the bandwidth occupied by the DRU is 80 MHz; If the value of k is 36, then the value of x is 24 and the value of y is 24; or If the value of k is 16, then the value of x is 48 and the value of y is 48; or If the value of k is 8, then the value of x is 102 and the value of y is 96; or If the value of k is 4, the value of x is 234 and the value of y is 192. The method of claim 10.

15. the bandwidth occupied by the DRU is 160 MHz; If the value of k is 72, then the value of x is 24 and the value of y is 24; or If the value of k is 32, then the value of x is 48 and the value of y is 48; or If the value of k is 16, then the value of x is 102 and the value of y is 96, or If the value of k is 8, then the value of x is 234 and the value of y is 192; or If the value of k is 4, the value of x is 468 and the value of y is 384. The method of claim 10.

16. the bandwidth occupied by the DRU is 320 MHz; If the value of k is 144, then the value of x is 24 and the value of y is 24; or If the value of k is 64, then the value of x is 48 and the value of y is 48, or If the value of k is 32, then the value of x is 102 and the value of y is 96, or If the value of k is 16, then the value of x is 234 and the value of y is 192; or If the value of k is 8, then the value of x is 468 and the value of y is 384; or If the value of k is 4, the value of x is 980 and the value of y is 768. The method of claim 10.

17. The DRU instruction information is Resource Unit (RU) Allocation subfield, Uplink Bandwidth subfield, Uplink Bandwidth Extension subfield, or Primary / Secondary 160 subfield The method of claim 10, comprising at least one of:

18. In the LTF included in the TB PPDU, the value of the x data tones of each of the k distributed resource units is 1 or −1. The method of claim 10.

19. A communication device comprising a receiving unit and a transmitting unit, A communication device, wherein the receiving unit and the transmitting unit are configured to perform the method according to any one of claims 1 to 9.

20. A communication device comprising a receiving unit and a transmitting unit, A communication device, wherein the receiving unit and the transmitting unit are configured to perform the method according to any one of claims 10 to 18.

21. 19. A computer-readable storage medium, the computer-readable storage medium storing program instructions that, when executed on a computer, enable the computer to perform a method according to any one of claims 1 to 9, or enable the computer to perform a method according to any one of claims 10 to 18.

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