US-12627435-B2 - Method for sending data in wireless network, and related apparatus

Abstract

This application provides example methods for sending data in a wireless network, and example related apparatuses. One example method includes determining, by a first device, a distributed resource unit (RU) allocated to the first device, where the distributed RU includes data subcarriers and pilot subcarriers, all subcarriers of one distributed RU are distributed on a first frequency band, a size of the first frequency band is 20 MHz, the first frequency band includes a maximum of 18 pilot subcarriers that are disposed at an interval, a quantity of pilot subcarriers included in one distributed RU is greater than or equal to 2, and at least two pilot subcarriers included in one distributed RU are spaced by at least M pilot subcarriers. The first device sends a physical layer protocol data unit (PPDU) on the distributed RU.

Inventors

• Yuxin Lu
• Chenchen LIU
• Ming Gan
• Yunbo Li

Assignees

• HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date

20260512

Application Date

20231228

Priority Date

20210702

Claims (18)

1. 1 . A method for sending data in a wireless network, wherein the method comprises: determining, by a first device, a distributed resource unit (RU) allocated to the first device, wherein the distributed RU comprises data subcarriers and pilot subcarriers, all subcarriers of one distributed RU are distributed on a first frequency band, a size of the first frequency band is 20 MHz, and the first frequency band comprises a maximum of 18 pilot subcarriers that are disposed at an interval, wherein a quantity of pilot subcarriers comprised in one distributed RU is greater than or equal to 2, and at least two pilot subcarriers comprised in one distributed RU are spaced by at least M pilot subcarriers; and sending, by the first device, a physical layer protocol data unit (PPDU) on the distributed RU, wherein: the maximum of 18 pilot subcarriers that are disposed at an interval on the first frequency band are the same as pilot subcarriers in a continuous RU mode; and one distributed RU corresponds to one continuous RU, one continuous RU comprises at least two pilot subcarriers, and there is an intersection set between indexes of pilot subcarriers in the distributed RU and indexes of pilot subcarriers in the continuous RU.
2. 2 . The method according to claim 1 , wherein the distributed RU is a distributed 26-tone RU, the distributed 26-tone RU comprises 24 data subcarriers and two pilot subcarriers, and the two pilot subcarriers are spaced by at least nine pilot subcarriers.
3. 3 . The method according to claim 1 , wherein the distributed RU is a distributed 52-tone RU, the distributed 52-tone RU comprises two distributed 26-tone RUs, and pilot subcarriers of the distributed 52-tone RU comprise a part or all of pilot subcarriers in the two distributed 26-tone RUs.
4. 4 . The method according to claim 1 , wherein the distributed RU is a distributed 52-tone RU, the distributed 52-tone RU comprises at least 48 data subcarriers, a quantity of pilot subcarriers comprised in the distributed 52-tone RU is greater than or equal to 2 and is less than or equal to 4, and at least two pilot subcarriers in the maximum of four pilot subcarriers are spaced by at least nine pilot subcarriers.
5. 5 . The method according to claim 1 , wherein the distributed RU is a distributed 106-tone RU, the distributed 106-tone RU comprises two distributed 52-tone RUs, and pilot subcarriers of the distributed 106-tone RU comprise a part or all of pilot subcarriers in the two distributed 52-tone RUs.
6. 6 . The method according to claim 1 , wherein the distributed RU is a distributed 106-tone RU, a quantity of data subcarriers comprised in the distributed 106-tone RU is greater than or equal to 98, a quantity of pilot subcarriers comprised in the distributed 106-tone RU is greater than or equal to 2 and is less than or equal to 8, and at least two pilot subcarriers in the maximum of eight pilot subcarriers are spaced by at least nine pilot subcarriers.
7. 7 . A communication apparatus, wherein the apparatus comprises: at least one processor; a transceiver; and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to: determine a distributed resource unit (RU) allocated to the communication apparatus, wherein the distributed RU comprises data subcarriers and pilot subcarriers, all subcarriers of one distributed RU are distributed on a first frequency band, a size of the first frequency band is 20 MHz, and the first frequency band comprises a maximum of 18 pilot subcarriers that are disposed at an interval, wherein a quantity of pilot subcarriers comprised in one distributed RU is greater than or equal to 2, and at least two pilot subcarriers comprised in one distributed RU are spaced by at least M pilot subcarriers; and send, by the transceiver, a physical layer protocol data unit (PPDU) on the distributed RU, wherein: the maximum of 18 pilot subcarriers that are disposed at an interval on the first frequency band are the same as pilot subcarriers in a continuous RU mode; and one distributed RU corresponds to one continuous RU, one continuous RU comprises at least two pilot subcarriers, and there is an intersection set between indexes of pilot subcarriers in the distributed RU and indexes of pilot subcarriers in the continuous RU.
8. 8 . The communication apparatus according to claim 7 , wherein the distributed RU is a distributed 26-tone RU, the distributed 26-tone RU comprises 24 data subcarriers and two pilot subcarriers, and the two pilot subcarriers are spaced by at least nine pilot subcarriers.
9. 9 . The communication apparatus according to claim 7 , wherein the distributed RU is a distributed 52-tone RU, the distributed 52-tone RU comprises two distributed 26-tone RUs, and pilot subcarriers of the distributed 52-tone RU comprise a part or all of pilot subcarriers in the two distributed 26-tone RUs.
10. 10 . The communication apparatus according to claim 7 , wherein the distributed RU is a distributed 52-tone RU, the distributed 52-tone RU comprises at least 48 data subcarriers, a quantity of pilot subcarriers comprised in the distributed 52-tone RU is greater than or equal to 2 and is less than or equal to 4, and at least two pilot subcarriers in the maximum of four pilot subcarriers are spaced by at least nine pilot subcarriers.
11. 11 . The communication apparatus according to claim 7 , wherein the distributed RU is a distributed 106-tone RU, the distributed 106-tone RU comprises two distributed 52-tone RUs, and pilot subcarriers of the distributed 106-tone RU comprise a part or all of pilot subcarriers in the two distributed 52-tone RUs.
12. 12 . The communication apparatus according to claim 7 , wherein the distributed RU is a distributed 106-tone RU, a quantity of data subcarriers comprised in the distributed 106-tone RU is greater than or equal to 98, a quantity of pilot subcarriers comprised in the distributed 106-tone RU is greater than or equal to 2 and is less than or equal to 8, and at least two pilot subcarriers in the maximum of eight pilot subcarriers are spaced by at least nine pilot subcarriers.
13. 13 . A chip, wherein the chip comprises at least one processor and an interface, the processor is configured to read and execute instructions stored in a memory, and when the instructions are run, the chip is enabled to perform a method comprises: determining a distributed resource unit (RU) allocated to a first device, wherein the distributed RU comprises data subcarriers and pilot subcarriers, all subcarriers of one distributed RU are distributed on a first frequency band, a size of the first frequency band is 20 MHz, and the first frequency band comprises a maximum of 18 pilot subcarriers that are disposed at an interval, wherein a quantity of pilot subcarriers comprised in one distributed RU is greater than or equal to 2, and at least two pilot subcarriers comprised in one distributed RU are spaced by at least M pilot subcarriers; and sending a physical layer protocol data unit (PPDU) on the distributed RU, wherein: the maximum of 18 pilot subcarriers that are disposed at an interval on the first frequency band are the same as pilot subcarriers in a continuous RU mode; and one distributed RU corresponds to one continuous RU, one continuous RU comprises at least two pilot subcarriers, and there is an intersection set between indexes of pilot subcarriers in the distributed RU and indexes of pilot subcarriers in the continuous RU.
14. 14 . The chip according to claim 13 , wherein the distributed RU is a distributed 26-tone RU, the distributed 26-tone RU comprises 24 data subcarriers and two pilot subcarriers, and the two pilot subcarriers are spaced by at least nine pilot subcarriers.
15. 15 . The chip according to claim 13 , wherein the distributed RU is a distributed 52-tone RU, the distributed 52-tone RU comprises two distributed 26-tone RUs, and pilot subcarriers of the distributed 52-tone RU comprise a part or all of pilot subcarriers in the two distributed 26-tone RUs.
16. 16 . The chip according to claim 13 , wherein the distributed RU is a distributed 52-tone RU, the distributed 52-tone RU comprises at least 48 data subcarriers, a quantity of pilot subcarriers comprised in the distributed 52-tone RU is greater than or equal to 2 and is less than or equal to 4, and at least two pilot subcarriers in the maximum of four pilot subcarriers are spaced by at least nine pilot subcarriers.
17. 17 . The chip according to claim 13 , wherein the distributed RU is a distributed 106-tone RU, the distributed 106-tone RU comprises two distributed 52-tone RUs, and pilot subcarriers of the distributed 106-tone RU comprise a part or all of pilot subcarriers in the two distributed 52-tone RUs.
18. 18 . The chip according to claim 13 , wherein the distributed RU is a distributed 106-tone RU, a quantity of data subcarriers comprised in the distributed 106-tone RU is greater than or equal to 98, a quantity of pilot subcarriers comprised in the distributed 106-tone RU is greater than or equal to 2 and is less than or equal to 8, and at least two pilot subcarriers in the maximum of eight pilot subcarriers are spaced by at least nine pilot subcarriers.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2022/102493, filed on Jun. 29, 2022, which claims priority to Chinese Patent Application No. 202110753768.6, filed on Jul. 2, 2021. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to a method for sending data in a wireless network, and a related apparatus. BACKGROUND A transmit power of a device is limited by both a maximum power and a maximum power spectral density. To be specific, the transmit power of the device cannot exceed the maximum power value, and cannot exceed the maximum power spectral density, either. To enable the transmit power of the device to be larger, a corresponding transmit bandwidth may be expanded, to be specific, subcarriers allocated to the device become more discrete in frequency domain, that is, a quantity of subcarriers per MHz is reduced. For example, FIG. 1 is a schematic diagram of mapping a virtual resource unit (virtual resource unit, VRU) to a physical resource unit (physical RU, PRU). In FIG. 1, the following two manners are used to implement that all subcarriers of a 26-tone VRU are distributed to a PRU on a frequency band with a bandwidth of 20 MHz. Manner 1: Two pilot subcarriers in FIG. 1 participate in mapping. Manner 2: Two pilot subcarriers in FIG. 1 do not participate in mapping. It may be understood that, in FIG. 1, a frequency band with a bandwidth of 2 MHz includes one 26-tone VRU, that is, a VRU on a frequency band with a bandwidth of about 2 MHz includes 26 subcarriers, and the 26 subcarriers include two pilot subcarriers. With reference to FIG. 1, it can be learned that, because the 26-tone VRU on the frequency band with a bandwidth of about 2 MHz is distributed to a 26-tone PRU on the frequency band with a bandwidth of 20 MHz, a quantity of subcarriers per MHz can be reduced in both the two manners. However, pilot subcarriers in the two manners are sparsely distributed on the frequency band with a bandwidth of 20 MHz, that is, the pilot subcarriers cannot evenly cover the entire frequency band. When a pilot signal is sent by using a pilot subcarrier included in the 26-tone PRU, problems such as narrowband interference and frequency selective fading may occur, and consequently, transmission of the pilot signal may be greatly affected. Therefore, how to avoid the problems such as narrowband interference and frequency selective fading and improve pilot signal transmission reliability becomes an urgent technical problem to be resolved in a current phase. SUMMARY This application provides a method for sending data in a wireless network, and a related apparatus, to avoid problems such as narrowband interference and frequency selective fading, and improve pilot signal transmission reliability. According to a first aspect, a pilot signal transmission method is provided. The method includes: A first device determines a first frequency band to which a discrete RU allocated to the first device belongs; and the first device sends first pilot signals of the first device to a second device on all pilot subcarriers included on the first frequency band. It can be learned that, in the foregoing technical solution, a first frequency band that includes a discrete RU allocated to a STA is determined, so that the STA may send first pilot signals of the STA to an AP on all pilot subcarriers included on the first frequency band. In this way, the first pilot signals can be transmitted by using fixed and evenly distributed pilot subcarriers on the first frequency band, so that problems such as narrowband interference and frequency selective fading that are caused by sparse distribution of pilot subcarriers on a frequency band are avoided, and pilot signal transmission reliability is improved. In addition, a linear difference result is more accurate, so that a problem that a linear difference result is incorrect when pilot phases are not in a same period is avoided, and a linear difference implemented by using pilot subcarriers can accurately cover the entire frequency band. According to a second aspect, a pilot signal transmission method is provided. The method includes: A first device determines a first frequency band to which a discrete RU allocated to the first device belongs, where the first frequency band includes pilot subcarriers of a first discrete RU group and pilot subcarriers of a second discrete RU group, and the pilot subcarriers of the first discrete RU group and the pilot subcarriers of the second discrete RU group do not overlap; and the first device sends first pilot signals of the first device to a second device on all pilot subcarriers of the first discrete RU group or the second discrete RU group. It can be learned that, in the foregoing technical solution, a first frequency band that incl