Showing papers by "Minho Cheong published in 2014"

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

Abstract: 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.

Communication method using interference alignment in wireless lan

Abstract: 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.

Methods for channel sounding and scheduling for interference alignment in wireless local area network

Abstract: Provided are channel sounding and scheduling methods for interference alignment in a wireless LAN. The sounding method includes transmitting a RTS frame, the RTS frame including an OIA candidate AP list that includes identification information of a plurality of access points, transmitting a CTS-pole frame for triggering transmission of a CTS frame to a second access point which is a first access point in the OIA candidate AP list, and receiving a CTS frame which is a response to the CTS-pole frame from the second access point. Therefore, communication performance of the wireless LAN can be improved.

Method and system for managing channel in wireless local area network

Abstract: A method and system for managing a channel in a wireless local area network is disclosed. The method includes detecting adjacent access points, transmitting a resource allocation request frame including candidate channel information which the first access points wants to a master access point among the detected adjacent access points, receiving a resource allocation response frame which is a response with respect to the resource allocation request frame from the master access point, and configuring the BSS based on channel related information included in the resource allocation response frame. Accordingly, performance of the wireless local area network can be improved.

Method and apparatus for opportunistic interference alignment (oia) in single-user multiple-input multiple-output (su-mimo) transmission

Abstract: A method and apparatus for opportunistic interference alignment (OIA) in multi-user multiple-input multiple-output (MU-MIMO) transmission, the method including broadcasting a random beam, receiving, from a terminal, feedback information determined based on the random beam, selecting at least one terminal to which data is to be transmitted from among terminals based on the feedback information, adjusting a transmission power based on the feedback information, and transmitting data to the selected at least one terminal based on the adjusted transmission power.

Method of sharing channel information in wireless local area network (wlan) system

Abstract: Provided is a method of sharing channel information performed by an access point (AP), the method including setting a master AP among adjacent APs, adjusting time stamp information on a point in time for communication based on a beacon received from the adjacent APs, estimating a carrier frequency offset (CFO) using a packet received from the master AP, and readjusting the time stamp information based on the estimated CFO.

Method and apparatus for allocating channel in wireless local area network

Abstract: A method and apparatus for allocating a channel in a wireless local area network (WLAN) is disclosed. The method includes receiving a first frame including scheduling information with respect to a first interval from a second access point, generating a second frame including resource related information required for transmission and reception during a second interval which is continuous to the first interval, and transmitting the second frame to the second access point. Accordingly, performance of the WLAN can be improved.

Method and apparatus for controlling channel access in wireless local area network (wlan) system

Abstract: Disclosed are a method and apparatus for an access point (AP) to control channel access of a station in a wireless local area network (WLAN) system. An AP according to one embodiment may determine resource allocation information for protecting a resource for a station not referring to traffic indication map (TIM) information. The determined resource allocation information is transmitted to a station referring to the TIM information, and the station referring to the TIM information does not conduct channel access in a time period specified in the resource allocation information.

Channel access control method and apparatus in wireless lan system

Abstract: Disclosed is a method and apparatus for controlling channel access for a station by an access point in a wireless LAN system. An access point according to an embodiment may determine resource allocation information for protecting a resource of a station that does not refer to traffic indication map (TIM) information. The determined resource allocation information is transmitted to a station which refers to the TIM information, and the station which refers to the TIM information does not perform channel access during a certain time interval indicated in the resource allocation information.

Method for direct communication between stations in wireless local area system

Abstract: Disclosed is a method for direct communication between stations. The method for direct communication between stations may include: receiving scheduling information on a frequency selective transmission (FST) from an access point; setting up a link for communication with another station based on the scheduling information; and communicating with the other station using the link.

Terminal and base station in wireless communication system with multiple hierarchical cells and communication method of terminal in wireless communication system with multiple hierarchical cells

Abstract: Disclosed are handover and connection of a terminal and control of connection of a terminal by a base station in a communication environment including a plurality of communication cells having different ranges of communication coverage. According to an exemplary embodiment, a terminal of a wireless communication system including a plurality of hierarchical cells determines whether the terminal accesses a microcell in a macrocell as the terminal moves based on whether a control signal transmitted from a micro-base station managing the microcell is detected in a communication environment including a plurality of hierarchical cells divided according to communication coverage, determines whether the terminal connects to the microcell based on a connection criteria for the microcell, and connects to the microcell when the connection criteria for the microcell are satisfied and conducts communications using the macrocell when the connection criteria for the microcell are not satisfied.

Method for allocating channel in wireless local area network and apparatus for the same

Abstract: Disclosed are a method and an apparatus for allocating channels in a wireless local area network (LAN). The method includes the steps of: receiving a first frame, including scheduling information about a first interval, from a second access point; generating a second frame, including information related to resources required for transmission and reception through a second interval consecutive with the first interval; and transmitting the second frame to the second access point. Accordingly, performance of the LAN can be enhanced.

Communication based on frequency selective transmission in wireless local area network

Abstract: 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.