Electronics and Telecommunications Research Institute

Newracom, Inc.

Atlas Global Technologies LLC

Chung, Hyun Kyu

Hyoung Jin Kwon

Sok Kyu Lee

Jae Seung Lee

Min Ho Cheong

Woo Yong Lee

Yong Sun Kim

Kyeongpyo Kim

Hee Jung Yu

Seung Eun Hong

Jin Kyeong Kim

Jae Woo Park

Hyun Kyu Chung

Kap Seok Chang

Sung Geun Jin

Jee Yon Choi

Heejung Yu

Minho Cheong

Cheol Sig Pyo

Je Hun Lee

Wun Cheol Jeong

Chang Sub Shin

Nam Ho Hur

Kapseok Chang

Myung Sun Song

Kug Jin Yun

Gwang Soon Lee

Sung-Geun Jin

Jae Ick Choi

Gwang Zeen Ko

Jong-ee Oh

Hyun Duk Kang

Hyungu Park

Jin Hyung Oh

Yongjin Kwon

Hong Soog Kim

Hyun Jeong Yim

Jae Sup Lee

Je-Hun Lee

Dongyong Lee

Mln Ho Cheong

Soo In Lee

Min Taig Kim

Kwanghee Jung

Won Sik Cheong

Yoon Jin Lee

Young-Chai Ko

Seung Yong Hwang

Kyeong Pyo Kim

Kyeong-pyo Kim

Jong Hwa Choi

Seung Ku Hwang

Kwang Hee Jung

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

A method of transmitting a frame is provided by a device in a WLAN. The device sets as additional data subcarriers some of subcarriers which are not set as data subcarriers in at least part of fields included in a frame of a legacy frame format, and allocates information to the additional data subcarriers.

Frame transmitting method and frame receiving method

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 an apparatus and method for wideband short-range wireless communication using a directional antenna in a millimeter wave band, and the method for wideband short-range wireless communication according to an embodiment may determine a first time interval and a second time interval for a cooperated data frame transfer based on a packet transmission time at each transmission from a source node to a destination node, transmit a frame to a relay node through an antenna pattern directed towards the relay node at a start point of the first time interval, and transmit the frame to the destination node through an antenna pattern directed towards the destination node after a predetermined period of time from a start point of the second time interval.

Method for wideband short-range wireless communication using a directional antenna

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

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 determining at least one transmission station (STA), transmitting, to the transmission STA, an uplink multi-user poll (UL MU poll) frame requesting a data frame, receiving the data frame from the at least one transmission STA simultaneously, and transmitting an acknowledgement (ACK) frame to the at least one transmission STA in response to the receiving.

Method of transmitting and receiving frame for uplink multi-user multiple-input and multiple-output (UL MU-MIMO) communication

Disclosed is a communication method using interference alignment in a wireless local area network (WLAN). An access point (AP) according to one embodiment may receive first channel information between a station associated with the AP and the AP and second channel information between the station and a neighboring AP to perform interference alignment in cooperation with the AP from the station, and perform interference alignment based on the first channel information and the second channel information.

Communication method using interference alignment in wireless LAN

Growing community of inventors

Daejeon, South Korea

Hyoung Jin Kwon