Abstract:
A method and apparatus of controlling a transmit power in a wireless local area network is provided. A wireless device operated in a TV White Space transmits a white space map indicating a list of available channels, and transmits an extended power constraint indicating a plurality of transmission channels and a plurality of maximum transmit powers, wherein the plurality of transmission channels are selected among the list of available channels and each of the plurality of maximum transmit powers corresponds to a maximum transmit power for each of the plurality of transmission channels. Interference can be mitigated between wireless devices operated in the TV White Space.
Abstract:
A method for reporting load information in a wireless local area network system, and a device therefore are discussed. The method according to one embodiment includes transmitting basic service set (BSS) load information, the BSS load information including a multi user (MU) multiple input multiple output (MIMO) capable station count field, a first utilization field and a second utilization field. In addition, the MU-MIMO capable station count field indicates a total number of stations with MU reception capability currently associated with a BSS managed by the AP. Additionally, the first utilization field includes information about an interval during which a 40 MHz channel width is busy. Lastly, the second utilization field include information about an interval during which a 80 MHz channel width is busy.
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:
A communication method performed by a station (STA) in a Wireless Local Area Network (WLAN) system is provided. The method includes: broadcasting a Direct Link Setup (DLS) discovery request frame for discovering a destination STA with which a direct link will be set up; receiving a DLS discovery response frame from the destination STA in response to the DLS discovery request frame; setting up the direct link with the destination STA; and transmitting a data frame to an Access Point (AP). The step of transmitting the data frame comprises transmitting the data frame to the destination STA through the direct link. The data frame received by the destination STA is relayed to the AP.
Abstract:
A method and apparatus for signal transmission in a Wireless Local Area Network (WLAN) system. The method according to one embodiment includes generating a first very high throughput (VHT) signal, generating a second VHT signal, and transmitting the first VHT signal and the second VHT signal. The first VHT signal includes an indicator indicating that the second VHT signal is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme. The first VHT signal and the second VHT signal are used to transmit control information, and the control information includes a modulation and coding scheme (MCS) index indicating an MCS used in the step of transmitting and further includes a spatial stream identifier indicating a number of spatial streams.
Abstract:
A channel access method for a very high throughput (VHT) system using a bonding channel having a plurality of subchannels is provided. The method includes receiving training information comprising a training offset value through a subchannel, performing channel estimation on a full channel bandwidth comprising all subchannels when a time corresponding to the training offset value is elapsed after the training information is received, transmitting a request to send (RTS) frame to a destination station through some subchannels selected from the plurality of subchannels by one or a plurality of source stations according to a result of the channel estimation, and transmitting a clear to send (CTS) frame to one source station selected from the plurality of source stations by the destination station in response to the received RTS frame. Accordingly, an effective channel access mechanism is provided for the VHT system, and collision among stations can be avoided.
Abstract:
A method of transmitting data by a multi-user multiple input multiple output (MU-MIMO) transmitter in a wireless local area network system. The method includes transmitting by the MU-MIMO transmitter, a physical layer convergence procedure (PLCP) protocol data unit (PPDU), the PPDU including a bundled interface field, a modulation and coding scheme (MCS) index field and a data field; and transmitting, by the MU-MIMO transmitter, the PPDU to a receiving station. The bundled interface field indicates a number of a plurality of spatial streams allocated to the receiving station. The MCS index field indicates a same MCS index used for modulating and coding all of the plurality of spatial streams indicated by the bundled interface field. The data field is modulated and coded by an MCS scheme indicated by the MCS index field and transmitted via the plurality of spatial streams indicated by the bundled interface field.
Abstract:
A method for transmitting a data unit, performed by a transmitting station, in a wireless local area network system is provided. The method includes generating a repeated bit sequence, generating an interleaved bit sequence by interleaving the repeated bit sequence, generating at least one symbol by modulating the interleaved bit sequence, generating at least one OFDM symbol by performing IDFT (Inverse Discrete Fourier Transform) on the at least one symbol and transmitting the at least one OFDM symbol.
Abstract:
A method of transmitting a frame in a Wireless Local Area Network (WLAN) system is provided. The method includes receiving, by a first station, information about an association identifier (AID) from an access point, the AID identifying the first station in the WLAN system; transmitting, by the first station, a Direct Link Setup (DLS) request frame to a second station to request a setup for a direct link with the second station, the DLS request frame including the AID of the first station; receiving, by the first station, a DLS response frame from the second station in response to the DLS request frame, the DLS response frame including an AID of the second station; and transmitting, by the first station, a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) to the second station or the access point.
Abstract:
A method and apparatus for switching a band in a wireless local access network (WLAN) is provided. The method includes transmitting a multi-band switch request message to request switching from a first frequency band to a second frequency band, and receiving a multi-band switch response message in response to the multi-band switch request message. The multi-band switch request message includes a multi-band switch schedule to operate in the second frequency band. Wider coverage can be supported by using multi-band.