# US 12,114,349 B2 · Wireless communication method for saving power and wireless communication terminal using same

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- Number: US 12,114,349 B2
- Document ID: US12114349B2
- Status: Granted
- Kind: B2
- Application number: 16/856,040
- Filed: 2020-04-23
- Published: 2020-08-06
- Granted: 2024-10-08
- Earliest claimed: 2014-10-31
- 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: Yongho Kim; Jinsam Kwak; Juhyung Son
- Web page: https://patentgrep.com/patent/US12114349B2

## CPC

- H04W 74/004: {in the uplink, i.e. towards network}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information}
- H04W 52/02: Power saving arrangements
- H04W 72/04: Wireless resource allocation
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 74/0816: with collision avoidance
- Y02D 30/70: in wireless communication networks
- 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)
- 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

The present invention relates to a wireless communication method for power saving and a wireless communication terminal using the same, and more particularly, to a wireless communication method for efficiently operating data transmission/reception of each terminal in a high-density environment and a wireless communication terminal using the same. To this end, provided are a base wireless communication terminal, including: a transceiver configured to transmit and receive a wireless signal; and a processor configured to control an operation of the base wireless communication terminal, wherein the processor is configured to: transmit a traffic indicator map (TIM) including identifier information of at least one station which is to receive downlink data, transmit a trigger frame triggering a PS-Poll transmission of the at least one station indicated by the TIM, receive at least one PS-Poll transmitted in response to the trigger frame, and transmit downlink data to a station that transmitted the PS-Poll and a wireless communication method using the same.

## Claims

### Claim 1

A wireless communication terminal, the terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
receive a preamble of a wireless frame through the transceiver,
wherein the preamble comprises a L-STF(Legacy Short Training Filed), a L-LTF(Legacy Long Training Field), a L-SIG(Legacy Signal Field) and a specific SIG field,
wherein the specific SIG field includes a specific index among a plurality of indices,
wherein each of the plurality of indices corresponds to each of pre-configured resource unit sets including a plurality of resource units and a pre-configured number of at least one terminal for each of the pre-configured resource unit sets,
wherein sizes of two or more resource units among the plurality of resource units included in a specific resource unit set are different from each other when the specific resource set among the pre-configured resource unit sets is indicated by the specific index among the plurality of indices, and
wherein each of two or more terminals is allocated to the plurality of resource units indicated by the specific index when the two or more terminals are indicated by the specific index among the plurality of indices, and
receive a data based on a pre-configured resource unit set for the plurality of resource units and the pre-configured number of the at least one terminal indicated by the specific index.

### Claim 2 (depends on 1)

The wireless communication terminal of claim 1,
wherein the specific index indicates whether a transmission of the data is performed in the plurality of resource units less than a 20 MHz channel.

### Claim 3 (depends on 1)

The wireless communication terminal of claim 1,
wherein the preamble is received in units of a 20 MHz channel.

### Claim 4 (depends on 1)

The wireless communication terminal of claim 1,
wherein each of the pre-configured resource unit sets is related to a size of each of the plurality of resource units and an arrangement of the plurality of resource units.

### Claim 5

A wireless communication method of a wireless communication terminal, the method comprising:
receiving a preamble of a wireless frame,
wherein the preamble comprises a L-STF(Legacy Short Training Filed), a L-LTF(Legacy Long Training Field), a L-SIG(Legacy Signal Field) and a specific SIG field,
wherein the specific SIG field includes a specific index among a plurality of indices,
wherein each of the plurality of indices corresponds to each of pre-configured resource unit sets including a plurality of resource units and a pre-configured number of at least one terminal for each of the pre-configured resource unit sets,
wherein sizes of two or more resource units among the plurality of resource units included in a specific resource unit set are different from each other when the specific resource set among the pre-configured resource unit sets is indicated by the specific index among the plurality of indices, and
wherein each of two or more terminals is allocated to the plurality of resource units indicated by the specific index when the two or more terminals are indicated by the specific index among the plurality of indices; and
receiving a data based on a pre-configured resource unit set for the plurality of resource units and the pre-configured number of the at least one terminal indicated by the specific index.

### Claim 6 (depends on 5)

The method of claim 5,
wherein the specific index indicates whether a transmission of the data is performed in the plurality of resource units less than a 20 MHz channel.

### Claim 7 (depends on 5)

The method of claim 5,
wherein the preamble is received in units of a 20 MHz channel.

### Claim 8 (depends on 5)

The method of claim 5,
wherein each of the pre-configured resource unit sets is related to a size of each of the plurality of resource units and an arrangement of the plurality of resource units.