# US 12,114,261 B2 · Method and apparatus for allocating flexible transmission slot in wireless LAN system

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- Number: US 12,114,261 B2
- Document ID: US12114261B2
- Status: Granted
- Kind: B2
- Application number: 18/348,240
- Filed: 2023-07-06
- Published: 2023-11-02
- Granted: 2024-10-08
- Earliest claimed: 2012-07-10
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Electronics and Telecommunications Research Institute
- Inventors: Jae Seung Lee; Mln Ho Cheong; Hyoung Jin Kwon; Hee Jung Yu; Jae Woo Park; Sok Kyu Lee
- Web page: https://patentgrep.com/patent/US12114261B2

## CPC

- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 72/04: Wireless resource allocation
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04W 72/52: based on load
- H04W 74/002: {Transmission of channel access control information}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 72/1268: of uplink data flows
- H04W 72/20: Control channels or signalling for resource management
- H04W 84/12: WLAN [Wireless Local Area Networks]
- 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

A method and an apparatus for allocating a flexible transmission slot in a wireless local area network (LAN) system are disclosed. A flexible transmission slot allocation method of an access point (AP) in a wireless local area network (WLAN) system according to an exemplary embodiment includes transmitting a beacon including a traffic indication map (TIM) bit to a station, receiving a power save poll (PS-Poll) from the station in a slot implicitly allocated by the TIM bit, and transmitting an acknowledgement (ACK) including transmission slot allocation information on downlink data to the station.

## Claims

### Claim 1

A method of uplink transmission by a station (STA) in a wireless local area network, the method comprising:
receiving, from an access point (AP), an uplink soliciting frame including information on a plurality of an association identifier (AID) and information on resource allocation based on the AID, wherein each STA has its own AID and information on resource allocation includes information of each STA's resource allocation based on AID,
wherein the uplink soliciting frame is transmitted by the AP without a request from the STA, and the uplink soliciting frame solicits the STA to report an amount of uplink data buffered at the STA, wherein the information indicating an amount of uplink data buffered at the STA is included in medium access control (MAC) header of the frame transmitted to the AP;
in response to the uplink soliciting frame, transmitting, through an allocated resource based on the resource allocation included in the uplink soliciting frame, a first uplink transmission frame including the information indicating an amount of uplink data buffered at the STA,
receiving a data soliciting frame including information on the data transmission resource for the next transmission of the STA based on the information indicating an amount of uplink data buffered at the STA; and
transmitting, using the data transmission resource indicated by the data soliciting frame for the next transmission of the STA, a second uplink transmission frame including data to the AP.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the first uplink transmission frame includes data and information indicating the amount of uplink data buffered at the STA based on the AID to assist the AP in allocating a data transmission resource for the next transmission of the STA.

### Claim 3

A method of uplink reception by an access point (AP) in a wireless local area network, the method comprising:
transmitting, to a station (STA), an uplink soliciting frame including information on a plurality of an association identifier (AID) and information on resource allocation based on the AID, wherein each STA has its own AID and information on resource allocation includes information of each STA's resource allocation based on AID,
wherein the uplink soliciting frame is transmitted by the AP without a request from the STA and the uplink soliciting frame solicits the STA to report an amount of uplink data buffered at the STA, wherein the information indicating an amount of uplink data buffered at the STA is included in medium access control (MAC) header of the frame transmitted to the AP;
in response to the uplink soliciting frame, receiving, through an allocated resource based on the resource allocation included in the uplink soliciting frame, a first uplink transmission frame including the information indicating an amount of uplink data buffered at the STA,
transmitting a data soliciting frame including information on the data transmission resource for the next transmission of the STA based on the information indicating an amount of uplink data buffered at the STA; and
receiving, using the data transmission resource indicated by the data soliciting frame for the next transmission of the STA, a second uplink transmission frame including data from the STA.

### Claim 4 (depends on 3)

The method of claim 3,
wherein the first uplink transmission frame includes data and information indicating the amount of uplink data buffered at the STA based on the AID to assist the AP in allocating a data transmission resource for the next transmission of the STA.

### Claim 5

An apparatus of a station (STA) performing uplink transmission in a wireless local area network, the apparatus comprising:
a receiver;
a transmitter; and
a controller,
wherein the controller is configured to:
receive, using the receiver, from an access point (AP), an uplink soliciting frame including information on a plurality of an association identifier (AID) and information on resource allocation based on the AID,
wherein each STA has its own AID and information on resource allocation includes information of each STA's resource allocation based on AID,
wherein the uplink soliciting frame is transmitted by the AP without a request from the STA, and the uplink soliciting frame solicits the STA to report an amount of uplink data buffered at the STA, wherein the information indicating an amount of uplink data buffered at the STA is included in medium access control (MAC) header of the frame transmitted to the AP,
in response to the uplink soliciting frame, transmit, using the transmitter, through an allocated resource based on the resource allocation included in the uplink soliciting frame, a first uplink transmission frame including the information indicating an amount of uplink data buffered at the STA,
receive a data soliciting frame including information on the data transmission resource for the next transmission of the STA based on the information indicating an amount of uplink data buffered at the STA, and
transmit, using the data transmission resource for the of transmission from the STA, a second uplink transmission frame including data to the AP.

### Claim 6 (depends on 5)

The method of claim 5,
wherein the first uplink transmission frame includes data and information indicating the amount of uplink data buffered at the STA based on the AID to assist the AP in allocating a data transmission resource for the next transmission of the STA.