Method and apparatus for ack transmission in a wlan
AssigneeLG Electronics Inc.
InventorsYu Jin NOH, Dae Won LEE, Yong Ho SEOK
Life of this patent
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Abstract
The present invention relates to a method and apparatus for acknowledgement (ACK) transmission in a WLAN. A station receives a plurality of data frames from a plurality of other stations and then transmits an ACK for the plurality of data frames to the plurality of stations. The ACK is a multi-user (MU) block ACK frame which includes a plurality of block ACKs for the plurality of stations. One block ACK includes at least one ACK for at least one data frame that is received from one station.
Claims8
A method of receiving acknowledgement (ACK) from an Access Point (AP) in a Wireless Local Area Network (WLAN), the method performed by a receiving station and comprising:
- receiving a control frame used for uplink (UL) multi-user (MU) transmission, wherein the control frame indicates a plurality of stations participating the UL MU transmission and indicates a time duration for the UL MU transmission;
- in response to the control frame, transmitting a response frame during the time duration, wherein the receiving station belongs to the plurality of stations;
- and
- receiving a single frame including an MU ACK frame which is used for a plurality of response frames of the plurality of stations,
- wherein the MU ACK frame comprises a Medium Access Control (MAC) header followed by a Block ACK (BA) control field followed by a plurality of BA information fields,
- wherein the MAC header includes a frame control field, a duration/ID field, a receiver address (RA) field, and a transmitter address (TA) field which are used for the MU ACK frame,
- wherein the BA control field is common to the plurality of stations, and the BA information fields are corresponding to the plurality of stations, respectively, wherein the BA control field includes an ACK type field indicating that the MU ACK frame is used for the plurality of stations,
- wherein each BA information field includes an association ID (AID) field indicating a corresponding station, a traffic ID (TID) field used for the corresponding station, and a BA bitmap field indicating least one ACK for a corresponding response frames of the corresponding station.
A receiving station in a Wireless Local Area Network (WLAN), comprising
- a transceiver receiving a control frame used for uplink (UL) multi-user (MU) transmission, wherein the control frame indicates a plurality of stations participating the UL MU transmission and indicates a time duration for the UL MU transmission, transmitting a response frame during the time duration in response to the control frame, wherein the receiving station belongs to the plurality of stations, and receiving a single frame including an MU acknowledgement (ACK) frame which is used for a plurality of response frames of the plurality of stations;
- and
- a data processor processing the control frame and controlling the transceiver,
- wherein the MU ACK frame comprises a Medium Access Control (MAC) header followed by a Block ACK (BA) control field followed by a plurality of BA information fields,
- wherein the MAC header includes a frame control field, a duration/ID field, a receiver address (RA) field, and a transmitter address (TA) field which are used for the MU ACK frame,
- wherein the BA control field is common to the plurality of stations, and the BA information fields are corresponding to the plurality of stations, respectively, wherein the BA control field includes an ACK type field indicating that the MU ACK frame is used for the plurality of stations,
- wherein each BA information field includes an association ID (AID) field indicating a corresponding station, a traffic ID (TID) field used for the corresponding station, and a BA bitmap field indicating least one ACK for a corresponding response frames of the corresponding station.
Dependencies are inferred from the claim text.