Abstract:
A method and an apparatus for protecting a primary service as an unlicensed device in a regulatory domain where a licensed device and the unlicensed device are permitted to operate are disclosed. For protecting a primary service by a station as an unlicensed device in a regulatory domain where a licensed device and the unlicensed device are permitted to operate, the unlicensed device acquires a list of identified available channels for the operation of the unlicensed device and maximum allowed transmission powers of the identified available channels from a regulatory domain database system; generates a white space map (WSM) comprising the list of identified available channels and the maximum allowed transmission powers of the identified available channels; updates the WSM when the station acquires information that a primary service signal is detected on a specific channel which is indicated as available in the WSM; and transmits the updated WSM to another station such that the another station moves to another channel if the another station is operating on the specific channel.
Abstract:
Methods and apparatuses for communicating in a wireless local area network are provided. The method includes receiving, by a responding station, from a requesting station, a Modulation and Coding Scheme (MCS) feedback request frame to request the responding station to provide a MCS feedback, the MCS feedback request frame including a first MCS feedback sequence identifier identifying a MCS feedback request. The method also includes transmitting, by the responding station, to the requesting station, a MCS feedback frame as a response to the MCS feedback request frame, the MCS feedback frame including a MCS estimate and a second MCS feedback sequence identifier. An apparatus for performing the method is also provided.
Abstract:
A method and apparatus of transmitting a PPDU in a wireless communication system is provided. The method includes selecting a subchannel among a plurality of subchannels, wherein a PLCP preamble and a PLCP header in each PPDU are independently generated in each of the plurality of subchannels, and transmitting a PPDU in the selected subchannel.
Abstract:
A method for receiving data in a wireless local area network. The method includes establishing, by a destination station (STA), a direct link between a requesting STA and the destination STA; establishing, by the requesting STA, a relay link between the requesting STA and the destination STA; receiving, by the destination STA, data from the requesting STA through the direct link; and receiving, by the destination STA, the data from a relay STA of the relay link.
Abstract:
A method is provided for transmitting a data frame by a station in a wireless local area network. The station obtains a transmission opportunity (TXOP) for a bandwidth, the TXOP indicating an interval of time during which the station has a right to initiate frame exchange sequences onto wireless medium. The station sets a transmit bandwidth parameter of a non-initial physical layer protocol data unit (PPDU) of a plurality of PPDUs to be transmitted during the TXOP based on a transmit bandwidth parameter of a preceding PPDU of the plurality of PPDUs. The transmit bandwidth parameter of the non-initial PPDU is set to be same or narrower than the transmit bandwidth parameter of the preceding PPDU. A bandwidth indicated by the transmit bandwidth parameter of the non-initial PPDU or the preceding PPDU includes at least one of 20 MHz, 40 MHz and 80 MHz. The station transmits the non-initial PPDU during the TXOP.
Abstract:
A method for receiving data by a receiving station by using a multi-user multiple input multiple output (MU-MIMO) in a wireless local area network system, the method includes receiving, via a transceiver in the receiving station, a physical layer convergence procedure (PLCP) protocol data unit (PPDU) from a transmitting station, the PPDU including a bundled interface field, a modulation and coding scheme (MCS) index field and a data field, wherein the bundled interface field indicates a number of a plurality of spatial streams allocated to the receiving station among a plurality of receiving stations, and indicates a total number of spatial streams allocated to the plurality of receiving stations that receive the PPDU, and wherein the MCS index field indicates a same MCS index used for modulating and coding the plurality of spatial streams allocated to the receiving station; and demodulating and decoding, via a processor in the receiving station and by using an MCS scheme indicated by the MCS index field, the data field received via the plurality of spatial streams indicated by the bundled interface field.
Abstract:
According to one embodiment, a method for granting a transmission opportunity in a wireless local area network includes: transmitting a transmission opportunity (TXOP) granting frame to grant a TXOP to a plurality of target stations; and receiving a frame from each of the plurality of target stations that has acquired the TXOP upon receiving the TXOP granting frame.
Abstract:
A method and a device for transmitting data in a wireless communication system are discussed. The method according to an embodiment includes transmitting a plurality of request to send (RTS) frames through a plurality of subchannels, each of the plurality of subchannels having a 20 megahertz (MHz) bandwidth; receiving at least one clear to send (CTS) frame through at least one idle subchannel; and transmitting a data frame. If the at least one CTS frame includes channel information related to the at least one idle subchannel through which the CTS frame is transmitted by the station, the data frame is transmitted through the at least one idle subchannel indicated by the channel information. A number of the at least one idle subchannel through which the CTS frame is transmitted is less than a number of the plurality of subchannels through which the plurality of RTS frames are transmitted.
Abstract:
Disclosed are a method and apparatus for multi-channel operation, performed by an access point (AP), in a WLAN system, the method includes: transmitting channel assignment information to a plurality of stations (STAs), in which the channel assignment information is for assigning at least one of a first channel and a second channel to each of the plurality of STAs; transmitting channel activity information to the plurality of STAs, in which the channel activity information is for indicating an activity duration where the AP transmit or receive a frame through each of the first channel and the second channel; and transmitting or receiving a frame through the first channel or the second channel on the basis of the channel activity information.
Abstract:
A method and a transmitting station for transmitting data in a wireless local area network are discussed. The method according to an embodiment includes generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU), the PPDU including a Very High Throughput Signal (VHT-SIG) field and a PLCP Service Data Unit (PSDU); and transmitting the PPDU to a receiving station. The VHT-SIG field includes a class type and identification information, the class type indicates that the PPDU is transmitted by an access point (AP) or a non-AP station, the identification information includes a partial identifier formed from a Basic Service Set Identifier (BSSID), and the partial identifier has a length shorter than a length of the BSSID.