# US 11,910,436 B2 · Wireless communication method and wireless communication terminal

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- Number: US 11,910,436 B2
- Document ID: US11910436B2
- Status: Granted
- Kind: B2
- Application number: 16/928,156
- Filed: 2020-07-14
- Published: 2020-10-29
- Granted: 2024-02-20
- Earliest claimed: 2014-08-07
- Assignees: Wilus Institute of Standards and Technology Inc.; SK Telecom Co., Ltd.
- Applicants: Wilus Institute of Standards and Technology Inc.; SK Telecom Co., Ltd.
- Inventors: Jinsoo Ahn; Yongho Kim; Jinsam Kwak; Juhyung Son
- Web page: https://patentgrep.com/patent/US11910436B2

## CPC

- H04W 74/0816: with collision avoidance
- H04W 56/0015: {one node acting as a reference for the others}
- H04W 74/006: {in the downlink, i.e. towards the terminal}
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Provided is a wireless communication terminal. The wireless communication terminal includes a transceiver configured to transmit/receive a wireless signal, and a processor configured to control an operation of the wireless communication terminal. The transceiver receives a trigger frame including information on a channel to be used, by a plurality of wireless communication terminals including the wireless communication terminal, in communication with a base wireless communication terminal that is any one wireless communication terminal different from the plurality of wireless communication terminals.

## Claims

### Claim 1

A base wireless communication terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
transmit, by using the transceiver, a first non-data frame, wherein the first non-data frame reserves a Transmit Opportunity (TXOP), and allocates a first channel for a second non-data frame which is a response to the first non-data frame to each of a first plurality of wireless communication terminals using a plurality of channel fields of the first non-data frame, wherein each of the plurality of channel fields includes a first subfield for an association identifier (AID) and a second subfield for an index indicating predetermined channel usage pattern for a frequency band range, wherein the first subfield indicates a wireless communication terminal to which a channel indicated by the second subfield is allocated, wherein the AID identifies an association between a wireless communication terminal corresponding to the AID and the base wireless communication terminal, and
receive, by using the transceiver, at least one second non-data frame through the first channel from at least one of the first plurality of wireless communication terminals.

### Claim 2 (depends on 1)

The base wireless communication terminal of claim 1, wherein the processor is configured to simultaneously transmit, by using the transceiver, a plurality of data frames to a second plurality of wireless communication terminals and synchronize airtimes of the plurality of data frames.

### Claim 3 (depends on 2)

The base wireless communication terminal of claim 2, wherein the processor is configured to pad at least one of the plurality of data frames to synchronize the airtimes of the plurality of data frames.

### Claim 4

A wireless communication terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
receive, by using the transceiver, a first non-data frame from a base wireless communication terminal, simultaneously with at least one of a first plurality of wireless communication terminals, wherein the first non-data frame reserves a Transmit Opportunity (TXOP), and allocates a channel for a second non-data frame which is a response to the first non-data frame to each of the wireless communication terminal and the first plurality of wireless communication terminals using a plurality of channel fields of the first non-data frame, wherein each of the plurality of channel fields includes a first subfield for an association identifier (AID) and a second subfield for an index indicating predetermined channel usage pattern for a frequency band range, wherein the first subfield indicates a wireless communication terminal to which a channel indicated by the second subfield is allocated, and
transmit, by using the transceiver, a second non-data frame through the channel indicated by the second subfield of the channel field to the base wireless communication terminal when the first subfield of the channel field indicates an AID of the wireless communication terminal,
wherein the AID of the wireless communication terminal identifies an association between the wireless communication terminal and the base wireless communication terminal.

### Claim 5 (depends on 4)

The wireless communication terminal of claim 4, wherein the processor is configured to receive, by using the transceiver, a first data frame from the base wireless communication terminal, simultaneously with receiving a second data frame by a second wireless communication terminal,
wherein an airtime of the first data frame is synchronized with an airtime of the second data frame.

### Claim 6 (depends on 5)

The wireless communication terminal of claim 5, wherein padding is used for the synchronization of the airtime of the first data frame with the airtime of the second data frame.

### Claim 7

A method of operating a wireless communication terminal, the method comprising:
receiving a first non-data frame from a base wireless communication terminal, wherein the first non-data frame reserves a Transmit Opportunity (TXOP), and allocates a channel for a second non-data frame which is a response to the first non-data frame to the wireless communication terminal and each of a first plurality of wireless communication terminals using a plurality of channel fields of the first non-data frame, wherein each of the plurality of channel fields includes a first subfield for an association identifier (AID) and a second subfield for an index indicating predetermined channel usage pattern for a frequency band range, wherein the first subfield indicates a wireless communication terminal to which a channel indicated by the second subfield is allocated, and
transmitting a second non-data frame through the channel indicated by the second subfield of the channel field to the base wireless communication terminal when the first subfield of the channel field indicates an AID of the wireless communication terminal,
wherein the AID of the wireless communication terminal identifies an association between the wireless communication terminal and the base wireless communication terminal.

### Claim 8 (depends on 7)

The method of claim 7, further comprising receiving a first data frame from the base wireless communication terminal, simultaneously with receiving a second data frame by a second wireless communication terminal,
wherein an airtime of the first data frame is synchronized with an airtime of the second data frame.

### Claim 9 (depends on 8)

The method of claim 8, wherein padding is used for the synchronization of the airtime of the first data frame with the airtime of the second data frame.