# US 2022/0286337 A1 · Method And Apparatus For Transmitting/Receiving Physical Layer Protocol Data Unit

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2022/0286337 A1
- Document ID: US20220286337A1
- Status: Published application
- Kind: A1
- Application number: 17/745,344
- Filed: 2022-05-16
- Published: 2022-09-08
- Earliest claimed: 2020-06-05
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Dandan LIANG; Ming GAN; Yang YANG; Xianfu LEI; Chenchen LIU; Zhengchun ZHOU; Wei LIN; Xiaohu TANG
- Web page: https://patentgrep.com/patent/US20220286337A1

## CPC

- H04L 27/2602: {Signal structure}
- H04L 27/2613: {Structure of the reference signals}
- H04L 27/2614: {Peak power aspects}
- H04L 27/262: {Reduction thereof by selection of pilot symbols}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04L 27/26132: {using repetition}
- H04W 80/02: Data link layer protocols
- H04W 84/12: WLAN [Wireless Local Area Networks]
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Example methods for transmitting a physical layer protocol data unit (PPDU) and apparatus are described. One example method includes generating and transmitting a PPDU that includes a long training field (LTF). A length of a frequency-domain sequence of the LTF is greater than a first length, and the first length is a length of a frequency-domain sequence of an LTF of a first PPDU transmitted over a channel whose bandwidth is 160 MHz.

## Claims

### Claim 1

A method for transmitting a physical layer protocol data unit, the method comprising:
generating a physical layer protocol data unit (PPDU), wherein the PPDU comprises a long training field, wherein a length of a frequency-domain sequence of the long training field is greater than a first length, and wherein the first length is a length of a frequency-domain sequence of a long training field of a first PPDU transmitted over a channel whose bandwidth is 160 MHz; and
sending the PPDU over a target channel, wherein a bandwidth of the target channel is greater than 160 MHz.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the bandwidth of the target channel is 240 MHz, and the frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M]; or
[LTF1×160M 023−LTF1×80M]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].

### Claim 3 (depends on 1)

The method according to claim 1, wherein the bandwidth of the target channel is 320 MHz, and the frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023−LTF1×80M]; or
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023 LTF1×80M]; or
[LTF1×160M 023−LTF1×160M]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].

### Claim 4

A method for receiving a physical layer protocol data unit, the method comprising:
receiving a physical layer protocol data unit (PPDU) over a target channel, wherein the PPDU comprises a long training field, wherein a length of a frequency-domain sequence of the long training field is greater than a first length, wherein the first length is a length of a frequency-domain sequence of a long training field of a first PPDU transmitted over a channel whose bandwidth is 160 MHz, and wherein a bandwidth of the target channel is greater than 160 MHz; and
parsing the PPDU.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the bandwidth of the target channel is 240 MHz, and the frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M]; or
[LTF1×160M 023−LTF1×80M]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].

### Claim 6 (depends on 5)

The method according to claim 5, wherein the bandwidth of the target channel is 320 MHz, and the frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023−LTF1×80M]; or
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023 LTF1×80M]; or
[LTF1×160M 023−LTF1×160M]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzright 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].

### Claim 7

An apparatus for transmitting a physical layer protocol data unit, the apparatus comprising:
at least one processor; and
one or more memories coupled to the at least one processor and storing program instructions for execution by the at least one processor to:
generate a physical layer protocol data unit (PPDU), wherein the PPDU comprises a long training field, wherein a length of a frequency-domain sequence of the long training field is greater than a first length, and wherein the first length is a length of a frequency-domain sequence of a long training field of a first PPDU transmitted over a channel whose bandwidth is 160 MHz; and
send the PPDU over a target channel, where a bandwidth of the target channel is greater than 160 MHz.

### Claim 8 (depends on 7)

The apparatus according to claim 7, wherein the bandwidth of the target channel is 240 MHz, and a frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M]; or
[LTF1×160M 023−LTF1×80M]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].

### Claim 9 (depends on 7)

The apparatus according to claim 7, wherein the bandwidth of the target channel is 320 MHz, and a frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023−LTF1×80M]; or
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023 LTF1×80M]; or
[LTF1×160M 023−LTF1×160M]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].

### Claim 10

An apparatus for receiving a physical layer protocol data unit, the apparatus comprising:
at least one processor; and
one or more memories coupled to the at least one processor and storing program instructions for execution by the at least one processor to:
receive a physical layer protocol data unit (PPDU) over a target channel, wherein the PPDU comprises a long training field, wherein a length of a frequency-domain sequence of the long training field is greater than a first length, wherein the first length is a length of a frequency-domain sequence of a long training field of a first PPDU transmitted over a channel whose bandwidth is 160 MHz, and wherein a bandwidth of the target channel is greater than 160 MHz; and
parse the PPDU.

### Claim 11 (depends on 10)

The apparatus according to claim 10, wherein the bandwidth of the target channel is 240 MHz, and a frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M]; or
[LTF1×160M 023−LTF1×80M]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].

### Claim 12 (depends on 10)

The apparatus according to claim 10, wherein the bandwidth of the target channel is 320 MHz, and a frequency-domain sequence of the long training field of the PPDU is one of the following:
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023−LTF1×80M]; or
[LTF1×80M 023 LTF1×80M 023−LTF1×80M 023 LTF1×80M]; or
[LTF1×160M 023−LTF1×160M]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023−LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright]; or
[LTF1×80 MHzleft 0−LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023 LTF1×80 MHzleft 0 LTF1×80 MHzright 023−LTF1×80 MHzleft 0−LTF1×80 MHzright].