Abstract:
Disclosed is a protocol for transmitting data through cooperation between access points in an overlapped basic service set (OBSS) environment. A cooperative beamforming communication method may include negotiating, by a first access point, a cooperative transmit beamforming with a second access point having an OBSS area with the first access point; transmitting, by the first access point, a clear-to-send (CTS) to the second access point; and performing, by the first access point, the cooperative transmit beamforming with the second access point during a cooperative transmit beamforming duration determined through the negotiation after a predetermined time interval is elapsed, when transmission of the CTS is completed.
Abstract:
Disclosed are a frame transmission method and a communication device performing the same. The communication device may transmit a null data packet (NDP)-announcement (NDP-A) including information on a plurality of communication devices participating in interference alignment and transmit an NDP including a common signal field and a common training field commonly applied to the plurality of communication devices.
Abstract:
A base station allocates a first frequency resource and a first time resource for first information that is included in a first physical channel and second information that is included in a second physical channel. The base station multi-transmits the first physical channel and the second physical channel through spatial multiplexing.
Abstract:
A method for a communication link establishing device to establish a communication link in a targeted communication system is provided. A source terminal transmits a source terminal's identification information and threshold value information for selecting a relative angle measurement target to neighboring terminals including a target terminal, and transmits a relative angle measurement request signal to the target terminal and the neighboring terminals. Upon receipt of a response signal for the relative angle measurement request signal from at least one of the neighboring terminals including the target terminal, a communication link with the selected communication target's terminal is established based on the information contained in the response signal.
Abstract:
Disclosed is a method and apparatus for communication in a millimeter band communication system. In a case in which a first terminal obtains a list including members of a cooperative group in which terminals receive a service with the same beam as a first terminal's beam, the first terminal informs a second terminal, corresponding to a member of the list, of communication link failure when the failure occurs, and requests a cooperative service. After that, the first terminal receives information on the service from a base station through the second terminal.
Abstract:
A method for transmitting a control channel including: receiving information regarding a format of the control channel from a base station (BS) through higher layer signaling; and transmitting a control channel mapped to at least one of a plurality of resource blocks positioned at both end portions of a system band to the BS through one slot on the basis of the information regarding the format of the control channel, and a method for performing a shortened hybrid automatic repeat request (HARQ) process, are provided.
Abstract:
A method of sending control information including selecting an available physical resource block (PRB) in a control subframe included in a D2D frame and sending the control information using the available PRB, and a terminal for realizing the method, are provided.
Abstract:
For a transmitting terminal which is connected to a small base station of a small cell to transmit data to a receiving terminal belonging to another small cell, information of the receiving terminal to a target small base station to which the receiving terminal is connected is received from a small base station; when handover to the target small base station may be made, the handover to the target small base station is made depending on a handover instruction from the small base station and then data are transmitted to the receiving terminal through the target small base station.
Abstract:
Disclosed is a protocol for transmitting data through cooperation between access points in an overlapped basic service set (OBSS) environment. A cooperative beamforming communication method may include negotiating, by a first access point, a cooperative transmit beamforming with a second access point having an OBSS area with the first access point; transmitting, by the first access point, a clear-to-send (CTS) to the second access point; and performing, by the first access point, the cooperative transmit beamforming with the second access point during a cooperative transmit beamforming duration determined through the negotiation after a predetermined time interval is elapsed, when transmission of the CTS is completed.
Abstract:
The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.