# US 12,016,003 B2 · Method and device for transmitting feedback frame in wide band in wireless LAN system

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- Number: US 12,016,003 B2
- Document ID: US12016003B2
- Status: Granted
- Kind: B2
- Application number: 17/597,318
- Filed: 2020-06-16
- Published: 2022-10-06
- Granted: 2024-06-18
- Earliest claimed: 2019-07-08
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Eunsung Park; Jinsoo Choi; Dongguk Lim
- Web page: https://patentgrep.com/patent/US12016003B2

## CPC

- H04B 7/0452: Multi-user MIMO systems
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04B 7/0617: {for beam forming}
- H04L 1/1621: {Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers}
- H04L 1/1635: {Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages}
- H04L 1/1685: {the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal}
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04W 72/02: Selection of wireless resources by user or terminal
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Proposed are a method and device for receiving a feedback frame for MIMO beamforming in a wide band in a wireless LAN system. Specifically, a reception STA receives an NDPA frame from a transmission STA. The reception STA receives an NDP frame from the transmission STA. The reception STA transmits a feedback frame to the transmission STA on the basis of the NDP frame. The feedback frame includes information about a feedback subcarrier for the wide band. When the wide band is a continuous 320 MHz band and the grouping value is Ng, the indexes of the feedback subcarrier are set to [−2036:Ng:−1540], [−1532:Ng:−1036], [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], [516:Ng:1012], [1036:Ng:1532] and [1540:Ng:2036].

## Claims

### Claim 1

A method in a wireless local area network (WLAN) system, the method comprising:
receiving, by a receiving station (STA), a Null Data Packet Announcement (NDPA) frame from a transmitting STA;
receiving, by the receiving STA, a Null Data Packet (NDP) frame from the transmitting STA; and
transmitting, by the receiving STA, a feedback frame to the transmitting STA based on the NDP frame,
wherein the feedback frame includes information on a feedback subcarrier for a wideband,
wherein, when the wideband is a contiguous 320 MHz band and a grouping value is equal to Ng, indexes of the feedback subcarrier are set to [−2036:Ng:−1540], [−1532:Ng:−1036], [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], [516:Ng:1012], [1036:Ng:1532], and [1540:Ng:2036], and
wherein [A:Ng:B] indicates that indexes of the feedback subcarrier are set from A to B at a spacing of Ng.

### Claim 2 (depends on 1)

The method of claim 1, wherein the grouping value is equal to an index spacing between the feedback subcarriers.

### Claim 3 (depends on 1)

The method of claim 1, wherein, when the grouping value is equal to 4, indexes of the feedback subcarrier are set to [−2036:4:−1540], [4532:4:4036], [−1012:4:−516], [−508:4:−12], [12:4:508], [516:4:1012], [1036:4:1532], and [1540:4:2036], and wherein, when the grouping value is equal to 16, indexes of the feedback subcarrier are set to [−2036:16:−1540], [4532:16:4036], [−1012:16:−516], [−508:16:−12], [12:16:508], [516:16:1012], [1036:16:1532], and [1540:16:2036].

### Claim 4 (depends on 1)

The method of claim 1, wherein, when the wideband is configured of a non-contiguous first 160 MHz band and second 160 MHz band, and when the grouping value is equal to Ng, indexes of a feedback subcarrier for the first 160 MHz band are set to [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], and [516:Ng:1012], and indexes of a feedback subcarrier for the second 160 MHz band are set to [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], and [516:Ng:1012].

### Claim 5 (depends on 4)

The method of claim 4, wherein, when the grouping value is equal to 4, indexes of the feedback subcarrier for the first and second 160 MHz bands are set to [−1012:4:−516], [−508:4:−12], [12:4:508], and [516:4:1012], and
wherein, when the grouping value is equal to 16, indexes of the feedback subcarrier for the first and second 160 MHz bands are set to [−1012:16:−516], [−508:16:−12], [12:16:508], and [516:16:1012].

### Claim 6 (depends on 1)

The method of claim 1, further comprising:
receiving, by the receiving STA, information on a tone plan from the transmitting STA,
wherein the information on the tone plan includes allocation information on that a tone plan for the wideband is configured by repeating a tone plan for an 80 MHz band,
wherein the tone plan for the 80 MHz band is set as one of a first tone plan or a second tone plan,
wherein the first tone plan is a tone plan for an 80 MHz band being defined in an 802.11ax WLAN system, and
wherein the second tone plan is a tone plan that is configured by repeating 2 times a tone plan for a 40 MHz band being defined in an 802.11ax WLAN system.

### Claim 7

A receiving station (STA) in a wireless local area network (WLAN) system, the receiving STA comprising:
a memory;
a transceiver; and
a processor being operatively connected to the memory and the transceiver,
wherein the processor is configured to:
receive a Null Data Packet Announcement (NDPA) frame from a transmitting STA,
receive a Null Data Packet (NDP) frame from the transmitting STA, and
transmit a feedback frame to the transmitting STA based on the NDP frame,
wherein the feedback frame includes information on a feedback subcarrier for a wideband,
wherein, when the wideband is a contiguous 320 MHz band and a grouping value is equal to Ng, indexes of the feedback subcarrier are set to [−2036:Ng:−1540], [−1532:Ng:−1036], [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], [516:Ng:1012], [1036:Ng:1532], and [1540:Ng:2036], and
wherein [A:Ng:B] indicates that indexes of the feedback subcarrier are set from A to B at a spacing of Ng.

### Claim 8

A method in a wireless local area network (WLAN) system, the method comprising:
transmitting, by a transmitting station (STA), a Null Data Packet Announcement (NDPA) frame to a receiving STA;
transmitting, by the transmitting STA, a Null Data Packet (NDP) frame to the receiving STA; and
receiving, by the transmitting STA, a feedback frame from the receiving STA based on the NDP frame,
wherein the feedback frame includes information on a feedback subcarrier for a wideband,
wherein, when the wideband is a contiguous 320 MHz band and a grouping value is equal to Ng, indexes of the feedback subcarrier are set to [−2036:Ng:−1540], [−1532:Ng:−1036], [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], [516:Ng:1012], [1036:Ng:1532], and [1540:Ng:2036], and
wherein [A:Ng:B] indicates that indexes of the feedback subcarrier are set from A to B at a spacing of Ng.

### Claim 9 (depends on 8)

The method of claim 8, wherein the grouping value is equal to an index spacing between the feedback subcarriers.

### Claim 10 (depends on 8)

The method of claim 8, wherein, when the grouping value is equal to 4, indexes of the feedback subcarrier are set to [−2036:4:−1540], [4532:4:4036], [4012:4:−516], [−508:4:−12], [12:4:508], [516:4:1012], [1036:4:1532], and [1540:4:2036], and wherein, when the grouping value is equal to 16, indexes of the feedback subcarrier are set to [−2036:16:−1540], [4532:16:4036], [−1012:16:−516], [−508:16:−12], [12:16:508], [516:16:1012], [1036:16:1532], and [1540:16:2036].

### Claim 11 (depends on 8)

The method of claim 8, wherein, when the wideband is configured of a non-contiguous first 160 MHz band and second 160 MHz band, and when the grouping value is equal to Ng, indexes of a feedback subcarrier for the first 160 MHz band are set to [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], and [516:Ng:1012], and indexes of a feedback subcarrier for the second 160 MHz band are set to [−1012:Ng:−516], [−508:Ng:−12], [12:Ng:508], and [516:Ng:1012].

### Claim 12 (depends on 11)

The method of claim 11, wherein, when the grouping value is equal to 4, indexes of the feedback subcarrier for the first and second 160 MHz bands are set to [−1012:4:−516], [−508:4:−12], [12:4:508], and [516:4:1012], and wherein, when the grouping value is equal to 16, indexes of the feedback subcarrier for the first and second 160 MHz bands are set to [−1012:16:−516], [−508:16:−12], [12:16:508], and [516:16:1012].

### Claim 13 (depends on 8)

The method of claim 8, further comprising:
transmitting, by the transmitting STA, information on a tone plan to the receiving STA,
wherein the information on the tone plan includes allocation information on that a tone plan for the wideband is configured by repeating a tone plan for an 80 MHz band,
wherein the tone plan for the 80 MHz band is set as one of a first tone plan or a second tone plan,
wherein the first tone plan is a tone plan for an 80 MHz band being defined in an 802.11ax WLAN system, and
wherein the second tone plan is a tone plan that is configured by repeating 2 times a tone plan for a 40 MHz band being defined in an 802.11ax WLAN system.