Electronics and Telecommunications Research Institute

Sok Kyu Lee

Min Ho Cheong

Hyoung Jin Kwon

Jae Seung Lee

Hee Jung Yu

Jae Woo Park

Je Hun Lee

Jong Ee Oh

Jee Yon Choi

Hee Soo Lee

Il Gu Lee

Hun Sik Kang

Cheol Sig Pyo

Wun Cheol Jeong

Chang Sub Shin

Jung Bo Son

Ja Beom Gu

Myung Sun Song

Heejung Yu

Jae Ick Choi

Gwang Zeen Ko

Hyun Duk Kang

Jin Hyung Oh

Hong Soog Kim

Joon Soo Lee

Mln Ho Cheong

Yu Ro Lee

Hyun Gu Park

Seung Chan Bang

Eun Young Choi

Yun Joo Kim

Yong Jin Kwon

Chang Wahn Yu

In Kyeong Choi

Deuk Su Lyu

Sae Hun Oh

Jeong Chul Shin

A scanning method in a wireless local area network (WLAN) system is provided. The scanning method includes transmitting, by a station, a probe request frame and receiving, by the station, a probe response frame from an access point (AP). The AP determines whether to transmit the probe response frame in response to the probe request frame using information indicated by the probe request frame.

Method and apparatus of scanning in wireless local area network system

A method and an apparatus for allocating a flexible transmission slot in a wireless local area network (LAN) system are disclosed. A flexible transmission slot allocation method of an access point (AP) in a wireless local area network (WLAN) system according to an exemplary embodiment includes transmitting a beacon including a traffic indication map (TIM) bit to a station, receiving a power save poll (PS-Poll) from the station in a slot implicitly allocated by the TIM bit, and transmitting an acknowledgement (ACK) including transmission slot allocation information on downlink data to the station.

Method and apparatus for allocating flexible transmission slot in wireless LAN system

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 (N) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the Nand generating a coded block; parsing the coded block based on the s and the Nand generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.

Transmitter and method for transmitting data block in wireless communication system

An apparatus and method for orthogonal frequency division multiplexing (OFDM) transmission in a wireless local area network (WLAN) system is disclosed, in which the apparatus for OFDM transmission in the WLAN system includes a signal repetition unit to repeat an encoded signal based on a block unit and output the encoded signal and a repeated signal, an interleaver to interleave the encoded signal and the repeated signal and output an interleaved signal, a modulator to modulate the interleaved signal and output modulated symbols, and a phase rotation unit to phase shift the modulated symbol.

OFDM transmission method and device in wireless LAN system

Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including transmitting, to each of a plurality of stations (STAs), an uplink multi-user request (UL MU request) frame requesting transmission of a data frame, and receiving, from each of the plurality of STAs, the data frame during an identical period of time based on an identical reception intensity, wherein the UL MU request frame includes at least one of information on a transmission time of the data frame and information on a reception intensity of the data frame in the AP.

Uplink multi-user multiple-input and multiple-output (UL MU-MIMO) transmission request method in UL MU-MIMO communication

A method for channel sounding in a wireless local area network (WLAN) system and apparatus for the same is disclosed. An access point (AP) to perform the method for channel sounding broadcasts information on a restricted access window (RAW) for channel sounding included in a beacon, and transmits null data packets (NDP) for channel estimation in the RAW to a station (STA). The STA estimates channel information based on the NDPs, and transmits the estimated channel information to the AP.

Channel sounding method in wireless LAN system and device for supporting same

An operating mode change method of a wireless local area network (WLAN) system according to an exemplary embodiment includes transmitting, by a station (STA) to an access point (AP), an operating mode change request frame comprising at least one of information on a change of a traffic indication map (TIM) mode, a request for a change of a power save parameter, and information on a change of a service type of the STA, receiving, from the AP, an operating mode change response frame comprising at least one of a TIM mode allowed by the AP, a reallocated association identification (AID), and information on a changed power save parameter, and performing at least one of the change of the TIM mode and the change of the power save parameter based on the information included in the operating mode change.

Method for changing operating mode of wireless LAN system and wireless LAN system

Disclosed are a wireless communication method, and an access point and a station which perform the wireless communication method. A wireless communication method performed by an access point according to an embodiment may include performing channel sounding on a plurality of subchannels, identifying subchannels selected by stations among the subchannels, scheduling communications between the AP and the stations based on the selected subchannels, and transmitting a data frame to the stations through the subchannels based on a scheduling result.

Method and apparatus for wireless communication based on frequency selective transmission in wireless local area network

The present invention relates to a terminal for requesting and acquiring information relating to channel access in a wireless LAN, and to an apparatus for providing information relating to channel access in a wireless LAN. The terminal for requesting and acquiring information relating to channel access in a wireless LAN according to one embodiment of the invention verifies the reception of a beacon during a preset beacon interval, if it is verified that the beacon has not been received, transmits a group and slot information request signal, and receives, from an access point, a group and slot information response signal as a response to the group and slot information request signal.

Method and terminal for requesting and acquiring information relating to channel access in wireless LAN, and apparatus for providing information relating to channel access in wireless LAN

A scanning method performed by a station (STA) in a wireless LAN system is provided. The method comprises: transmitting a probe request frame; and receiving a short probe response frame from an access point (AP) as a response to the probe request frame. The short probe response frame includes service set ID (SSID) information or compressed SSID information of the AP.

Scanning method in wireless LAN system and supporting device therefor

Provided is slot use control apparatus and method, including an access point (AP) to control a slotted channel access of a station (STA) in a wireless local area network (WLAN) includes generating a synchronization (synch) frame including an identification value indicating an STA allocated to a slot, and broadcasting the generated synch frame when a channel is in an idle state at a start point of the slot.

Apparatus and method for controlling slot usage

Growing community of inventors

Daejeon, South Korea

Sok Kyu Lee