# US 10,375,708 B2 · Method and apparatus for transmitting data on resource unit including pilot tone in WLAN

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- Number: US 10,375,708 B2
- Document ID: US10375708B2
- Status: Granted
- Kind: B2
- Application number: 15/517,507
- Filed: 2015-10-06
- Published: 2017-08-03
- Granted: 2019-08-06
- Earliest claimed: 2014-10-06
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jinsoo Choi; Hangyu Cho; Wookbong Lee
- Web page: https://patentgrep.com/patent/US10375708B2

## CPC

- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 5/00: Arrangements affording multiple use of the transmission path
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04L 27/2602: {Signal structure}
- H04W 72/12: Wireless traffic scheduling
- H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)}
- H04L 27/2603: {Signal structure ensuring backward compatibility with legacy system}
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W 88/08: Access point devices
- 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)

## Abstract

An access point device and method for: generating and transmitting a physical layer protocol data unit (PPDU) including a plurality of resource units on a bandwidth, where the plurality of resource units includes a first tone unit and a second tone unit. The first tone unit includes a total of 26 tones, where 2 pilot tones for the first tone unit are included in the total of 26 tones. The second tone unit includes a plurality of tones being greater than the total of 26 tones. The 4 pilot tones for the second tone unit are included in the plurality of tones. The locations of a plurality of pilot tones for the plurality of resource units are fixed when two first tone units are included in the plurality of resource units in place of the second tone unit.

## Claims

### Claim 1

A method for supporting operations of a wireless device in a wireless local area network (WLAN), the method comprising:
generating, by an access point (AP), a physical layer protocol data unit (PPDU) including a plurality of resource units on a bandwidth,
wherein the plurality of resource units include a first tone unit related to a second tone unit,
wherein the first tone unit includes a total of 26 tones,
wherein 2 pilot tones are included in the total of 26 tones for the first tone unit,
wherein the second tone unit includes a plurality of tones being greater than the first tone unit, and
wherein 4 pilot tones are included in the plurality of tones for the second tone unit, and
wherein the 2 pilot tones are aligned on a frequency location with a portion of the 4 pilot tones; and
transmitting, by the AP, the PPDU based on the plurality of resource units.

### Claim 2 (depends on 1)

The method of claim 1, wherein allocation information for the plurality of resource units is included in a header of the PPDU.

### Claim 3

An access point (AP) for supporting operations of a wireless device in a wireless local area network (WLAN), the AP comprising:
a radio frequency (RF) unit for transmitting and receiving a radio signal; and
a processor operatively coupled to the RF unit,
wherein the processor is configured for:
generating a physical layer protocol data unit (PPDU) including a plurality of resource units on a bandwidth,
wherein the plurality of resource units include a first tone unit related to a second tone unit,
wherein the first tone unit includes a total of 26 tones,
wherein 2 pilot tones for the STU are included in the total of 26 tones for the first tone unit,
wherein the second tone unit includes a plurality of tones being greater than the first tone unit, and
wherein 4 pilot tones are included in the plurality of tones for the second tone unit, and
wherein the 2 pilot tones are aligned on a frequency location with a portion of the 4 pilot tones; and
transmitting the PPDU based on the plurality of resource units.

### Claim 4 (depends on 3)

The method of claim 3, wherein allocation information for the plurality of resource units is included in a header of the PPDU.