Abstract: In wireless communications for a 20 megahertz (MHz) channel bandwidth, a first device may determine a high efficiency long training field (HE-LTF) mode. The first device may generate an HE-LTF symbol by using a portion or an entirety of an HE-LTF sequence corresponding to the channel bandwidth and HE-LTF mode. The first device may transmit, in the channel bandwidth, a high efficiency physical layer protocol data unit (HE PPDU) that includes the HE-LTF symbol. A second device may receive, in the 20 MHz channel bandwidth, a downlink HE PPDU that includes an HE-LTF symbol. The second device may obtain, from the HE-LTF symbol, a portion or an entirety of an HE-LTF sequence corresponding to the channel bandwidth and an HE-LTF mode of the HE-LTF symbol. The downlink HE PPDU may be the HE PPDU from the first device. Other methods, apparatus, and computer-readable media are also disclosed.

Abstract: A station includes one or more memories and processors, configured to cause the processors to generate a first frame that includes a plurality of data units, where each of the plurality of data units is associated with traffic information, transmit the first frame to a wireless device in the wireless network, and receive a second frame that includes one or more per-station information fields. Each of the per-station information fields includes a first subfield that is set to a first predetermined value and a second subfield. The first subfield indicates whether the plurality of data units were received successfully and the first predetermined value indicates successful reception of all of the plurality of data units carried in the first frame that has elicited the second frame. The second subfield indicates whether the plurality of data units were received successfully when they are associated with different types of traffic information.

Abstract: A wireless device transmits a frame by determining a plurality of Resource Units (RUs) of the frame, providing pilots in a first RU of the frame at a first set of positions, providing pilots in a second RU of the frame at a second set of positions, and transmitting the frame. The first set of positions is different from the second set of positions. A wireless device receives a frame including an RU including pilots and processes the pilots. When an RU for the data symbol includes an odd-numbered lowest subcarrier, the pilots are included at a first set of positions in the resource unit. When the RU includes an even-numbered lowest subcarrier, the pilots are included at a second set of positions in the resource unit. The second set of positions is different from the first set of positions.

Abstract: A wireless device includes one or more memories and one or more processors, configured to cause the wireless device to process a downlink frame including a first address field that is eliciting a response from a plurality of stations, generate an uplink frame including a second address field in response to the downlink frame. The second address field is set to a value of the first address field when the downlink frame is of a first type or a value of an address associated with an access point when the downlink frame is of a second type. The uplink frame is transmitted on a resource allocated by resource allocation information included in the downlink frame for an uplink multi-user transmission. The plurality of stations simultaneously transmits uplink frames in response to the first type of downlink frame and the plurality of stations simultaneously transmits uplink data frames.

Abstract: A network device is provided. The network device includes one or more memories and one or more processors coupled to the one or more memories. The one or more processors are configured receive a DL MU PPDU, decode a data frame including a media access control (MAC) header from the DL MU PPDU, determine whether an acknowledgement (ACK) policy indicated in the MAC header signals a trigger-based immediate acknowledgement policy, and determine whether a trigger indication for an uplink (UL) MU transmission has been obtained from a payload of a data frame. Responsive to the processor determines that the trigger indication has not been obtained, the processor is configured to not transmit an immediate acknowledgement to the access point. In response to the trigger indication has not been obtained but the station has obtained a transmission opportunity, the station returns an ACK/Block ACK frame in an unsolicited manner.

Abstract: In wireless communications for multi-users, a station may generate a first frame and transmit the first frame to an access point. The first frame may include media access control protocol data units (MPDUs). Each MPDU is associated with a traffic identifier (TID). In one aspect, a TID of one of the MPDUs is different from a TID of another one of the MPDUs. In response to receiving the first frame, the access point may generate a second frame based on the first frame. The second frame may include an indication that all of the MPDUs having TIDs are received. The access point may transmit the second frame to the station. Other methods, apparatus, and computer-readable media are also disclosed.

Abstract: In wireless communications for multi-users, a station may receive a trigger frame including a transmitter address field. When the trigger frame is a multi-user request-to-send (MU-RTS) frame eliciting clear-to-send (CTS) frames from a plurality of stations, the station transmit a CTS frame including a first receiver address field in response to the trigger frame. The first receiver address field may be set equal to the transmitter address field. When the trigger frame elicits data frames from a plurality of stations, the station transmit a data frame including a second receiver address field in response to the trigger frame. The second receiver address field may be set to a destination address. Other methods, apparatus, and computer-readable media are also disclosed.

Abstract: A wireless device generating a High-Efficiency (HE) PHY Protocol Data Unit (PPDU) for transmission sets a Packet Extension Disambiguity bit of an HE Signal-A (HE-SIG-A) field of the HE PPDU based on respective durations of a packet extension of the HE PPDU and a signal extension of the HE PPDU. The wireless device may determine whether a relationship T P ? E + ( 4 × ? TXTIME - T S ? E - 2 ? 0 4 ? - ( TXTIME - T S ? E - 2 ? 0 ) ) ? T SYM ? is satisfied, where TPE is the duration of the packet extension, TXTIME is a transmission time of the HE PPDU, TSE is the duration of the signal extension, and TSYM is a duration of symbols in a data field of the HE PPDU. The wireless device may set the Packet Extension Disambiguity bit to one when the relationship is satisfied; and to zero when the relationship is not satisfied.

Abstract: An access point device coupled to a station through a wireless local area network to elicit a trigger-based immediate acknowledgement from the station is provided. The access point device is configured to one or more of generate trigger information for an uplink (UL) multiuser (MU) transmission, generate a frame, and transmit a downlink (DL) MU physical layer (PRY) Protocol Data Unit (PPDU) to the station. The DL MU PPDU includes the frame and the trigger information. An ACK policy field of the frame is set to a binary value of ‘01’ to request the station to provide a trigger-based immediate acknowledgement where the station is to transmit a trigger-based immediate acknowledgement frame to the access point device according to the trigger information if the trigger information is obtained by the station and the station is to refrain from transmitting the trigger-based immediate acknowledgement frame to the access point device if the trigger information is not obtained by the station.

Abstract: A wireless communication device in a wireless system may generate a High Efficiency Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (HE PPDU) frame including (i) an Orthogonal Frequency Division Multiplexing (OFDM) symbol including padding bits and (ii) an extension having a non-zero signal strength, and transmit the HE PPDU frame. A High Efficiency signal (HE-SIG) field of the transmitted HE PPDU frame may include an indication for a duration of the extension to avoid ambiguity of the extension. A communication device in a wireless system may receive an HE PPDU frame including (i) an OFDM symbol including padding bits, and (ii) an extension having a non-zero signal strength, and transmit an Acknowledgement frame a predetermined inter-frame space after an end of the HE PPDU frame. An HE-SIG field of the received HE PPDU may include an indication for duration of the extension to avoid ambiguity of the extension.

Abstract: A network device is provided. The network device includes one or more memories and one or more processors coupled to the one or more memories. The one or more processors are configured to one or more of receive the DL MU PPDU, decode a data frame from the DL MU PPDU, determine whether an acknowledgement (ACK) policy indicated in the MAC header signals a trigger-based immediate acknowledgement policy, and determine whether a trigger indication for an uplink (UL) MU transmission has been obtained from a payload of a data frame. In response to the processor determines that the ACK policy indication signals the trigger-based immediate acknowledgement policy and determines that the trigger indication has been obtained, the processor is configured to transmit a trigger-based immediate acknowledgement frame to the AP in an UL MU PPDU, based on the trigger indication.

Abstract: A multi-user uplink transmission is performed by analyzing, by a first wireless station, a spatial reuse field in a first frame, and generating, by the first wireless station, a second frame, wherein the second frame includes a spatial reuse field that is generated based on the spatial reuse field of the first frame. The first frame and the second frame are within the same transmission opportunity (TXOP) and the first frame is transmitted prior to the second frame during the TXOP.

Abstract: A network device functions as an access point in a wireless local area network. The network device includes one or more memories and one or more processors. The one or more processors are configured to generate a physical layer protocol data unit (PPDU) that includes a plurality of aggregated media access control protocol data units (A-MPDUs), set a length subfield in a common information field of the trigger frame in a first A-MPDU to a same value as corresponding subfields in common information fields of the trigger frames in each of the other A-MPDUs of the plurality of A-MPDUs, and transmit the PPDU through a wireless medium. Each of the plurality of A-MPDUs includes a trigger frame to schedule an uplink transmission.

Abstract: To receive data in data field of a PHY Protocol Data Unit (PPDU), wherein the data field includes mid-ambles, a number of mid-ambles and a number of data symbols included in the data field is determined. The number of mid-ambles is determined according to information in an HE-SIG-A field of the PPDU, information in an L-SIG field of the PPDU, and one or more predetermined values prescribed by a standard. The number of data symbols may be determined using the number of the mid-ambles, and the data received according to the number of mid-ambles and the number of data symbols.

Abstract: A wireless device transmits a frame by determining a plurality of Resource Units (RUs) of the frame, providing pilots in a first RU of the frame at a first set of positions, providing pilots in a second RU of the frame at a second set of positions, and transmitting the frame. The first set of positions is different from the second set of positions. A wireless device receives a frame including an RU including pilots and processes the pilots. When an RU for the data symbol includes an odd-numbered lowest subcarrier, the pilots are included at a first set of positions in the resource unit. When the RU includes an even-numbered lowest subcarrier, the pilots are included at a second set of positions in the resource unit. The second set of positions is different from the first set of positions.

Abstract: A method implemented by an access point (AP) in a wireless local area network (WLAN). The method includes generating a physical layer protocol data unit (PPDU) that includes a plurality of aggregated media access control protocol data units (A-MPDUs), where each of the plurality of A-MPDUs includes a trigger frame for scheduling an uplink transmission, setting each of one or more subfields in a common information field of the trigger frame in one of the plurality of A-MPDUs in the PPDU to the same values as corresponding subfields in common information fields of the trigger frames in each of the other A-MPDUs of the plurality of A-MPDUs, and transmitting the PPDU through a wireless medium.

Abstract: A wireless device generates a High Efficiency Signal B (HE-SIG-B) field by Block Convolution Code (BCC) encoding and rate-matching a BCC block of the HE-SIG-B field, generates a Physical Layer Protocol Data Unit (PPDU) including the HE-SIG-B field, and transmits the PPDU. A total number N is a total number of bits of the HE-SIG-B field that precede the BCC block, and is greater than 0. The BCC block has a puncturing pattern depending on the total number N. A wireless device receives a PPDU. The PPDU includes an HE-SIG-B field that includes an encoded BCC block. The wireless device de-rate-matches the encoded BCC block having a puncturing pattern depending on a total number N. The total number N is a total number of decoded bits of the HE-SIG-B field that preceded the BCC block, and the total number N is greater than 0.

Abstract: A station is provided. The station includes one or more memories and one or more processors. The one or more processors are configured to one or more of process a first request for buffer status received from an access point and transmit, during the first uplink multi-user transmission to the access point and in response to the first request for buffer status, a first uplink null data packet and that includes a signal that indicates existence of data to be sent from the station to the access point. The first request for buffer status schedules a first uplink multi-user transmission and indicates a plurality of resources that indicates existence of data to be sent to the access point. The one or more processors transmits the first uplink null data packet includes the one or more processors configured to transmit the signal on a first resource of the plurality of resources.

Abstract: An access point device coupled to a station through a wireless local area network to elicit a trigger-based immediate acknowledgement from the station is provided. The access point device is configured to one or more of generate trigger information for an uplink (UL) multiuser (MU) transmission, generate a frame, and transmit a downlink (DL) MU physical layer (PRY) Protocol Data Unit (PPDU) to the station. The DL MU PPDU includes the frame and the trigger information. An ACK policy field of the frame is set to a binary value of ‘01’ to request the station to provide a trigger-based immediate acknowledgement where the station is to transmit a trigger-based immediate acknowledgement frame to the access point device according to the trigger information if the trigger information is obtained by the station and the station is to refrain from transmitting the trigger-based immediate acknowledgement frame to the access point device if the trigger information is not obtained by the station.

Abstract: A network device is provided. The network device includes one or more memories and one or more processors coupled to the one or more memories. The one or more processors are configured to one or more of receive the DL MU PPDU, decode a data frame from the DL MU PPDU, determine whether an acknowledgement (ACK) policy indicated in the MAC header signals a trigger-based immediate acknowledgement policy, and determine whether a trigger indication for an uplink (UL) MU transmission has been obtained from a payload of a data frame. In response to the processor determines that the ACK policy indication signals the trigger-based immediate acknowledgement policy and determines that the trigger indication has been obtained, the processor is configured to transmit a trigger-based immediate acknowledgement frame to the AP in an UL MU PPDU, based on the trigger indication.