Downlink acknowledgment in response to uplink multiple user transmission
AssigneeNewracom, Inc.
InventorYongho Seok
Life of this patent
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Abstract
The present invention provides a method and apparatus for transmitting a downlink ACK in response to an uplink multi-user transmission in a HE WLAN. In an aspect of the present invention, a method for transmitting an ACK in response to uplink data received from a plurality of STAs by an AP in a WLAN may be provided. The method may include transmitting a frame triggering transmission of a plurality of uplink data units from the plurality of STAs to the plurality of STAs, receiving a PPDU frame including a plurality of uplink data units from the plurality of STAs a predetermined IFS after transmitting the trigger frame, and transmitting an ACK frame including ACKs for the plurality of data units from the plurality of STAs.
Claims15
A method for transmitting an ACKnowledgement (ACK) in response to uplink data received from a plurality of Stations (STAs) by an Access Point (AP) in a Wireless Local Area Network (WLAN), the method comprising:
- transmitting, to the plurality of STAs, a frame triggering transmission of a plurality of uplink data units from the plurality of STAs;
- receiving a Physical layer Protocol Data Unit (PPDU) frame including a plurality of uplink data units from the plurality of STAs a predetermined Inter-Frame Space (IFS) after transmitting the trigger frame;
- and
- transmitting an ACK frame including ACKs for the plurality of data units from the plurality of STAs,
- wherein the ACK frame includes one or more ACK fields respectively corresponding to one or more of the plurality of STAs,
- wherein each of the one or more ACK fields includes a first subfield including identification information about a STA, a second subfield indicating block ACK or ACK, and a third subfield indicating a Traffic Identifier (TID),
- wherein when the second subfield included in the ACK field indicates block ACK, the ACK field includes block ACK bitmap information and block ACK starting sequence control information, and
- wherein when the second subfield included in the ACK field indicates ACK, the ACK field does not include the block ACK bitmap information and the block ACK starting sequence control information.
A method for receiving an ACKnowledgement (ACK) in response to uplink data transmitted to an Access Point (AP) by a Station (STA) in a Wireless Local Area Network (WLAN), the method comprising:
- receiving, from the AP, a frame triggering transmission of a plurality of uplink data units from the STA and one or more other STAs;
- transmitting a Physical layer Protocol Data Unit (PPDU) frame including an uplink data unit of the STA a predetermined Inter-Frame Space (IFS) after receiving the trigger frame, when the other one or more STAs transmit one or more data units;
- and
- receiving an ACK frame including ACKs for the plurality of data units from the plurality of STAs,
- wherein the ACK frame includes one or more ACK fields corresponding to one or more of the plurality of STAs, respectively,
- wherein each of the one or more ACK fields includes a first subfield including identification information about a STA, a second subfield indicating block ACK or ACK, and a third subfield indicating a Traffic Identifier (TID),
- wherein when the second subfield included in the ACK field indicates block ACK, the ACK field includes block ACK bitmap information and block ACK starting sequence control information, and
- wherein when the second subfield included in the ACK field indicates ACK, the ACK field does not include the block ACK bitmap information and the block ACK starting sequence control information.
Dependencies are inferred from the claim text.