Abstract: The objective of the present invention is to analyze a network topology in a wireless communication system. A method for operating a node performing wireless communication comprises the steps of: decoding a packet in order to acquire information on peripheral links, for transmitting the packet, from the packet that does not use the node as a source or a destination; and transmitting, to a control node for performing scheduling, a message including the information on the peripheral links. In addition, the present invention includes the above-mentioned embodiment and the other embodiments.

Abstract: Exemplary embodiments of the present disclosure suggest an apparatus and method for rapidly establishing an initial connection and exchanging data among wireless devices in a wireless communication system. According to the exemplary embodiments of the present disclosure, a certain wireless device for transmitting data may discover neighboring wireless devices and display locations of the discovered wireless devices as information in the form of a map. Then, a user can easily select a wireless device to transmit data to based on the information which is displayed in the form of the map as described above, and transmit desired data to the selected wireless device.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure relates to a method and apparatus for selecting a channel in a wireless communication system. A method of operating a terminal in a wireless communication system is provided. The method includes transmitting information regarding a second channel and information regarding a third channel to a peer terminal in a first channel. The method also includes transmitting a first request signal for connection with the peer terminal in the second channel. The method further includes if a response signal for the first request signal is not received in the second channel, transmitting a second request signal for connection with the peer terminal in the third channel. The first channel belongs to a first band, and the second channel belongs to a second band.

Abstract: A method and apparatus for beamforming in a wireless communication system are provided. The method of supporting beamforming in a wireless communication device includes detecting a direction change of the wireless communication device while communicating with a peer device. The method of supporting beamforming in a wireless communication device also includes adjusting a beam direction for communication with the peer device based on information indicating a direction change of the wireless communication device.

Abstract: Disclosed is a method and apparatus for searching a target cell for handover in a wireless communication system. The method includes determining a priority of at least one neighboring base station based on the reliability of a direction of a beam allocated to a mobile station, and transmitting a message informing the mobile station of the priority.

Abstract: A method of operating a terminal is provided. The method includes receiving resource allocation information for reporting a resource allocated by a target Access Point (AP) before accessing the target AP for a handover, and transmitting a signal for a registration to the target AP through a resource indicated by the resource allocation information.

Abstract: A cognitive radio communication system using a multiple input multiple output (MIMO) communication technology is provided. A cognitive radio base station includes a plurality of antennas, a group setting unit to set at least one sensing terminal group that includes at least one sensing terminal among a plurality of terminals, and a signal generator to generate a transmission signal to transmit the transmission signal using channels formed between the plurality antennas and the plurality of terminals, so that the at least one sensing terminal is accorded a sensing time.

Abstract: An apparatus and method for exchanging frequency bands used by a plurality of base stations are provided. A base station for exchanging frequency bands includes a receiving unit to receive first quiet time duration information of an adjacent base station, a frequency band measuring unit to determine first frequency band measuring information with respect to a first frequency band used by the adjacent base station based on the first quiet time duration information, a frequency band exchange-determining unit to determine whether to exchange frequency bands with each other based on the first frequency band measuring information, and a transmitting unit to transmit data to a terminal using the first frequency band according to the determined result.

Abstract: A wireless communication system, and more particularly, a base station apparatus to lend an idle resource to another base station or to borrow an idle resource from another base station is provided. A borrowing base station apparatus includes a transmitter to transmit an idle resource borrowing message to a lending base station, and a receiver to receive, from the lending base station in response to the idle resource borrowing message, an idle resource lending message including information regarding whether to lend an idle resource of the lending base station, such that the transmitter transmits data to a terminal using the idle resource. The borrowing base station may borrow an idle resource from the lending base station to use the borrowed idle resource to perform data transmission.

Abstract: An apparatus and method for exchanging frequency bands used by a plurality of base stations are provided. A base station for exchanging frequency bands includes a receiving unit to receive first quiet time duration information of an adjacent base station, a frequency band measuring unit to determine first frequency band measuring information with respect to a first frequency band used by the adjacent base station based on the first quiet time duration information, a frequency band exchange-determining unit to determine whether to exchange frequency bands with each other based on the first frequency band measuring information, and a transmitting unit to transmit data to a terminal using the first frequency band according to the determined result.

Abstract: A cognitive radio communication system using a multiple input multiple output (MIMO) communication technology is provided. A cognitive radio base station includes a plurality of antennas, a group setting unit to set at least one sensing terminal group that includes at least one sensing terminal among a plurality of terminals, and a signal generator to generate a transmission signal to transmit the transmission signal using channels formed between the plurality antennas and the plurality of terminals, so that the at least one sensing terminal is accorded a sensing time.