Abstract: The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal.

Abstract: A method by a first wireless device in a wireless network to support simultaneous transmit-receive with a second wireless device in the wireless network using a first wireless link and a second wireless link. The method includes transmitting multi-link operation information to the second wireless device, wherein the multi-link operation information indicates a frequency separation that is to be maintained between the first wireless link and the second wireless link and transmitting a first frame to the second wireless device using the first wireless link while simultaneously receiving a second frame from the second wireless device using the second wireless link, wherein the frequency separation is maintained between the first wireless link and the second wireless link when transmitting the first frame and receiving the second frame simultaneously.

Abstract: A method by a wireless device functioning as a beamformer station in a wireless network to perform a sounding procedure. The method includes generating a NDPA frame, wherein the NDPA frame includes a sounding dialog token field, wherein bit B0 of the sounding dialog token field is set to binary ‘1’ and bit B1 of the sounding dialog token field is set to binary ‘1’ to indicate that the NDPA frame is an extremely high throughput (EHT) NDPA frame and wirelessly transmitting the NDPA frame to one or more beamformee stations. The NDPA frame may include an indication of whether a beamformee station should acknowledge the NDP announcement frame or not. The NDPA frame may be transmitted in a first frequency band, while a beamformed data frame is transmitted in a second frequency band that is a higher frequency band than the first frequency band.

Abstract: A method is described for a wireless device, which includes determining padding for a sub-physical layer (PHY) protocol data unit (sub-PPDU) in an aggregated PPDU (APPDU). The method includes generating the sub-PPDU that includes a preamble portion and a data portion, determining a longest sub-PPDU for the APPDU to be transmitted, determining an amount and type of padding for the sub-PPDU where the sub-PPDU in not the longest sub-PPDU in the APPDU, adding padding to the sub-PPDU to align the end of the sub-PPDU with the end of the longest sub-PPUD, and transmitting the sub-PPDU through a wireless medium on a transmission channel to a receiving device as part of the APPDU.

Abstract: A method by a wireless device to extend communication range when operating in a 6 Gigahertz (GHz) band of a wireless network is described. The method includes generating a physical layer protocol data unit (PPDU) that includes a preamble portion and a data portion that includes first data and transmitting the PPDU through a wireless medium on a transmission channel that is subdivided into a plurality of resource units (RUs), wherein the first data is duplicated in the data portion in a frequency domain in units of RUs.

Abstract: A method is described for communicating in a network. The method includes setting a type bit in a frame to indicate whether the frame is scheduling an uplink transmission for a first set of stations or a first and second set of stations; configuring a common information field of the frame for (1) the first set of stations for the transmission and (2) when the type bit indicates, the second set of stations for the transmission; configuring a set of user information fields of the frame for (1) the first set of stations for the transmission and (2) when the type bit indicates, the second set of stations for the transmission; and transmitting the frame to (1) the first set of stations and (2) the second set of stations when the type bit indicates that the frame is scheduling for the first and second set of stations.

Abstract: A method is described, which includes receiving, by a wireless station from a first access point, an overlapping basic service set (OBSS) status report request, which requests information from the station regarding a set of neighboring access points; transmitting, by the wireless station to the first access point, an OBSS status report that indicates path-loss characteristics of channels between the set of neighboring access points and the wireless station; receiving, by the wireless station from the first access point, an access point cooperation null data packet announcement frame, which indicates a cooperative transmission between the first access point and the second access point to the wireless station; receiving, by the wireless station from the first access point, a first null data packet and a second null data packet from the second access point, wherein the first and second null data packets are transmitted as part of the cooperative transmission.

Abstract: A method for encoding a bitstream is described. The method includes receiving, by an error correction unit, the bitstream; performing, by the error correction unit, encoding on the bitstream to generate an encoded bit stream that includes the bitstream and parity bits; processing, by a constellation unit, the encoded bitstream to generate constellation points in one or more encoded streams; determining, by a low-density parity-check (LDPC) tone mapper, a distance between subcarriers in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of the frame; and performing, by the LDPC tone mapper, LDPC tone mapping based on the one or more encoded streams and on the determined distance to generate a permuted stream of complex numbers, wherein the distance between subcarriers is determined to be either (1) 18 for a first resource unit size used in the frame and (2) 20 for a second resource unit size used in the frame.

Abstract: A method includes determining, by a Media Access Control (MAC) layer of a first wireless station, a total length of user data in a first Physical Layer (PHY) Protocol Data Unit (PPDU); determining, by the MAC layer, a Hybrid Automatic Repeat Request (HARQ) block size; adding a first indication to a transmission vector, wherein the first indication indicates the total length of user data in the first PPDU; adding a second indication to the transmission vector, wherein the second indication indicates the HARQ block size; passing the transmission vector to a PHY layer of the first wireless station; generating, by the PHY layer, the first PPDU based on the first indication and the second indication, wherein the first PPDU includes a first set of HARQ blocks that each have a size equal to the HARQ block size; and transmitting the first PPDU to a second wireless station.

Abstract: A process for receiving a Physical Layer Protocol Data Unit (PPDU) may include receiving a first portion of the PPDU. The first portion including a Legacy Signal (L-SIG) field and a second signal field that is received after the reception of the L-SIG field. The process further includes decoding, using first information in the L-SIG field, the second signal field, and determining, using second information included in the second signal field, that the PPDU includes midambles. In response to determining that the PPDU includes midambles, the process determines, using a midamble periodicity M, a number of midambles NMA in the PPDU, determines, using the number of midambles, a number of data symbols in a data field of the PPDU, and processes, using the number of midambles and the number of data symbols, the data field of the PPDU. The process may be performed by a wireless device.

Abstract: A method for encoding a bitstream is described. The method includes receiving, by an error correction unit, the bitstream; performing, by the error correction unit, encoding on the bitstream to generate an encoded bit stream that includes the bitstream and parity bits; processing, by a constellation unit, the encoded bitstream to generate constellation points in one or more encoded streams; determining, by a low-density parity-check (LDPC) tone mapper, a distance between subcarriers in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of the frame; and performing, by the LDPC tone mapper, LDPC tone mapping based on the one or more encoded streams and on the determined distance to generate a permuted stream of complex numbers, wherein the distance between subcarriers is determined to be either (1) 18 for a first resource unit size used in the frame and (2) 20 for a second resource unit size used in the frame.

Abstract: A method is described for transmitting a frame in a wireless network. The method includes setting, by a wireless device, a first field of the frame according to a first characteristic of the frame; setting, by the wireless device, a second field of the frame according to a second characteristic of the frame; setting, by the wireless device, a puncturing field of the frame in response to the first field of the frame meeting a first criteria and the second field of the frame meeting a second criteria, wherein the puncturing field is associated with puncturing a set of sub-channels of a transmission bandwidth of the frame; and transmitting, by the wireless device, the frame based on the transmission bandwidth and according to the set of sub-channels.

Abstract: Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.

Abstract: The present invention relates to a method and apparatus for transmitting and receiving data. A data transmission method from a sender terminal to a receiver terminal in a MIMO system using a variable frequency band according to one embodiment of the present invention comprises: repeatedly generating a signal field depending on a frequency band that is applied to the transmission of a data frame; generating a data field including the data; generating a data frame including the signal field and the data field; and transmitting the data frame to the receiver terminal. The present invention is advantageous in that a signal field which is transmitted together with the data being transmitted from the sender terminal to the receiver terminal in the MIMO system can be sent more efficiently.

Abstract: The present invention relates to a method and apparatus for transmitting and receiving data. A data transmission method from a sender terminal to a receiver terminal in a MIMO system using a variable frequency band according to one embodiment of the present invention comprises: repeatedly generating a signal field depending on a frequency band that is applied to the transmission of a data frame; generating a data field including the data; generating a data frame including the signal field and the data field; and transmitting the data frame to the receiver terminal. The present invention is advantageous in that a signal field which is transmitted together with the data being transmitted from the sender terminal to the receiver terminal in the MIMO system can be sent more efficiently.

Abstract: A method includes determining, by a Media Access Control (MAC) layer of a first wireless station, a total length of user data in a first Physical Layer (PHY) Protocol Data Unit (PPDU); determining, by the MAC layer, a Hybrid Automatic Repeat Request (HARQ) block size; adding a first indication to a transmission vector, wherein the first indication indicates the total length of user data in the first PPDU; adding a second indication to the transmission vector, wherein the second indication indicates the HARQ block size; passing the transmission vector to a PHY layer of the first wireless station; generating, by the PHY layer, the first PPDU based on the first indication and the second indication, wherein the first PPDU includes a first set of HARQ blocks that each have a size equal to the HARQ block size; and transmitting the first PPDU to a second wireless station.

Abstract: A method for encoding a bitstream is described. The method includes receiving, by an error correction unit, the bitstream; performing, by the error correction unit, encoding on the bitstream to generate an encoded bit stream that includes the bitstream and parity bits; processing, by a constellation unit, the encoded bitstream to generate constellation points in one or more encoded streams; determining, by a low-density parity-check (LDPC) tone mapper, a distance between subcarriers in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of the frame; and performing, by the LDPC tone mapper, LDPC tone mapping based on the one or more encoded streams and on the determined distance to generate a permuted stream of complex numbers, wherein the distance between subcarriers is determined to be either (1) 18 for a first resource unit size used in the frame and (2) 20 for a second resource unit size used in the frame.

Abstract: A method is described for generating and transmitting a frame by a station. The method includes determining a bandwidth of a frame to be transmitted by the station; generating a long training field for the frame, wherein the long training field includes a set of pilot tones located at a set of subcarrier positions, wherein when the bandwidth of the frame is 10 MHz, the set of subcarrier positions include four subcarrier positions and the four subcarrier positions are set as {?21-?1,?7-?2,7+?3,21+?4} where ?1, ?2, ?3, and ?4 are odd values, and wherein when the bandwidth of the frame is 20 MHz, the set of subcarrier positions include six sub carrier positions, including {?53-?1,?25-?2,?11-?3, 11+?4,25+?5,53+?6} where ?1, ?2, ?3, ?4, ?5, and ?6 are odd values.

Abstract: Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.

Abstract: A method for encoding a bitstream for a frame in a wireless transmission is described. The method includes receiving, by an error correction unit of the wireless device, the bitstream; performing, by the error correction unit, forward error correction on the bitstream to generate an error corrected bitstream; determining, by a dual sub-carrier modulation (DCM) mapper of the first wireless device, a number of data subcarriers for modulating the error corrected bitstream to subcarriers in each half of an orthogonal frequency-division multiplexing (OFDM) symbol, wherein the number of data subcarriers is determined to be (1) 26 for a first bandwidth of the frame, (2) 54 for a second bandwidth and performing, by the DCM mapper, DCM on the error corrected bitstream based on the determined number of data subcarriers to generate a stream of complex numbers corresponding to the number of data subcarriers.