Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIGfield.

Abstract: Disclosed herein are an apparatus and method for a multi-cloud service platform. The apparatus includes one or more processors and executable memory for storing at least one program executed by the one or more processors. The at least one program may receive a service request from a user client device, generate a multi-cloud infrastructure service using multiple clouds in response to the service request, make the multiple clouds interoperate with mufti-cloud infrastructure in order to provide the multi-cloud infrastructure service, and generate a multi-cloud application runtime environment corresponding to the multi-cloud infrastructure service.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method and device for transmitting a plurality of data units in a wireless local area network (WLAN) are discussed. The method includes obtaining by a station (STA) a transmission opportunity (TXOP), wherein the STA has a right to initiate frame exchange sequences during the TXOP; transmitting during the TXOP, a first data unit of the plurality of data units, wherein the first data unit comprises a signal field including information related to a bandwidth of the first data unit; selecting a bandwidth of a second data unit of the plurality of data units to be narrower than the bandwidth of the first data unit; and transmitting during the TXOP, the second data unit, wherein the second data unit comprises a signal field including information related to the bandwidth of the second data unit, wherein the first data unit is transmitted immediately before the second data unit.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method and device for transmitting a plurality of data units in a wireless local area network (WLAN) are discussed. The method includes obtaining by a station (STA) a transmission opportunity (TXOP), wherein the STA has a right to initiate frame exchange sequences during the TXOP; transmitting during the TXOP, a first data unit of the plurality of data units, wherein the first data unit comprises a signal field including information related to a bandwidth of the first data unit; selecting a bandwidth of a second data unit of the plurality of data units to be narrower than the bandwidth of the first data unit; and transmitting during the TXOP, the second data unit, wherein the second data unit comprises a signal field including information related to the bandwidth of the second data unit, wherein the first data unit is transmitted immediately before the second data unit.

Abstract: A method of transmitting a plurality of data units by a station in a wireless local area network (WLAN), includes performing, by the station, a clear channel assessment (CCA) on a bandwidth of an initial data unit of the plurality of data units; after performing the CCA, transmitting, by the station which has obtained a transmission opportunity (TXOP) for the plurality of data units, the initial data unit of the plurality of data units during the TXOP, wherein the initial data unit comprises a signal field including information on the bandwidth of the initial data unit; selecting, by the station, a bandwidth of a non-initial data unit of the plurality of data units to be narrower than the bandwidth of the initial data unit; and transmitting, by the station during the TXOP, the non-initial data unit, wherein the non-initial data unit comprises a signal field including information on the bandwidth of the non-initial data unit.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method of transmitting a training signal in a Wireless Local Area Network (WLAN) system includes generating one or more first training signals for a first destination station and one or more second training signals for a second destination station by applying a mapping matrix P to a training signal generation sequence, mapping the first training signals and the second training signals to a plurality of antennas according to an antenna mapping matrix, and performing Inverse Fast Fourier Transform (IFFT) on each of the first training signals and the second training signals mapped to the plurality of antennas and transmitting the training signals through the plurality of antennas.

Abstract: A method of transmitting a plurality of data units by a station in a wireless local area network (WLAN), includes performing, by the station, a clear channel assessment (CCA) on a bandwidth of an initial data unit of the plurality of data units; after performing the CCA, transmitting, by the station which has obtained a transmission opportunity (TXOP) for the plurality of data units, the initial data unit of the plurality of data units during the TXOP, wherein the initial data unit comprises a signal field including information on the bandwidth of the initial data unit; selecting, by the station, a bandwidth of a non-initial data unit of the plurality of data units to be narrower than the bandwidth of the initial data unit; and transmitting, by the station during the TXOP, the non-initial data unit, wherein the non-initial data unit comprises a signal field including information on the bandwidth of the non-initial data unit.

Abstract: According to one embodiment, a method for a wireless local area includes: generating a medium access control (MAC) protocol data unit (MPDU) to be transmitted to a target station; generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) by attaching a PLCP preamble to the MPDU; selecting a transmission channel; and transmitting the PPDU to the target station over the transmission channel. Selecting the transmission channel includes: performing clear channel assessment (CCA) on a first channel to determine whether the first channel is idle; and only after it is determined that the first channel is idle, selecting the first channel and at least one idle second channel as the transmission channel. The PLCP preamble includes channel allocation information indicating a bandwidth of the transmission channel.

Abstract: A method is provided for transmitting a signal by a station in a wireless local area network (WLAN). The station obtains a transmission opportunity (TXOP) indicating a time duration used for transmission of a plurality of data units. The station transmits, during the TXOP, an initial data unit of the plurality of data units. The initial data unit comprises a control field indicating a transmit bandwidth of the initial data unit. The station selects a transmit bandwidth of a non-initial data unit of the plurality of data units to be narrower than the transmit bandwidth of the initial data unit. The station transmits, during the TXOP, the non-initial data unit. The non-initial data unit comprises a control field indicating the transmit bandwidth of the non-initial data unit.

Abstract: A method of receiving a packet in a wireless local area network system includes receiving, from an access point (AP), a packet comprising a data field and a first signal field including a first field, a second field, and a third field, wherein the packet is generated for a single receiving station or a plurality of receiving stations; and processing the packet based on the first signal field, wherein the first field indicates a group ID of the single receiving station or the plurality of receiving stations and whether the packet is generated based on a single user transmission scheme or a multi user transmission scheme, wherein, for the single user transmission scheme, at least one pre-determined value of the first field is used to indicate that the packet is generated based on the single user transmission scheme.

Abstract: A method and apparatus for allowing a UE to transmit uplink signals using a MIMO scheme are disclosed. In order to maintain good Peak power to Average Power Ratio (PAPR) or Cubic Metric (CM) properties when the UE transmits uplink signals using the MIMO scheme, the UE uses a precoding scheme based on a precoding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method of transmitting information on a modulation and coding scheme (MCS) in a wireless local area network system is provided. A responding station receives a physical layer protocol data unit (PPDU) from a requesting station, configures a MCS feedback (MFB) based on the PPDU, and transmits feedback information to the requesting station. If the MFB is configured as a response to a MFB request (MRQ) of the requesting station, the feedback information includes the configured MFB and a MFB type field indicating that the MFB is configured as a response to the MRQ of the requesting station. If the MFB is not configured as a response to the MRQ of the requesting station, the feedback information includes the configured MFB, a MFB type field indicating that the MFB is not configured as a response to the MRQ of the requesting station, and coding information indicating a PPDU coding type.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method is provided for transmitting data in a wireless local area network. A transmitter generates an encoded data unit by performing a channel coding to transmission data to be included in a data field of a physical layer protocol data unit (PPDU). The transmitter generates at least one spatial block by re-arranging the encoded data unit, and divides each spatial block of at least one spatial block into two frequency segments. A bandwidth of each frequency segment is half of a bandwidth of the each spatial block. The transmitter interleaves the two frequency segments to generate a first interleaved segment and a second interleaved segment, respectively, and generates first and second mapped sequences by respectively mapping the first and second interleaved segments into a signal constellation. The transmitter performs an Inverse Discrete Fourier Transform (IDFT) on the first and second mapped sequences to generate and transmit a transmission signal.