Abstract:
A transceiving apparatus may comprise a radiator emitting a beam; a receiver receiving a beam; a first sub-reflector which is provided to face the radiator and changes an orbital angular momentum (OAM) mode order of a beam; a second sub-reflector which is provided to face the receiver and changes an OAM mode order of a beam differently from the first sub-reflector; and a main reflector which is provided to face the first sub-reflector and the second sub-reflector.
Abstract:
Provided are a technique for providing focused Bessel beams having orbital angular momentum (OAM) to a plane to solve a problem of the related art in which Laguerre-Gaussian (LG) beams having OAM and used for multiplexing of a microwave transmission system are dispersed, and an electromagnetic wave generation apparatus and method for implementing the technique.
Abstract:
A method for operating a station in a wireless LAN is disclosed. An OFDMA-based communication method comprises the steps of: receiving, from an access point, a first frame including time resource information and frequency resource information indicating a resource occupied for an OFDMA-based communication; and receiving, from the access point, a data frame through the resource indicated by the time resource information and frequency resource information. Therefore, performance of the wireless LAN system can be improved.
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.
Abstract:
An apparatus for controlling a near field wireless network, includes a wireless network controller included in a management plane of a wireless access point and configured to observe wireless physical layer/media access controller layer (PHY/MAC) protocols and perform a management procedure on wired MAC/PHY protocols within the wireless access point. Further, the apparatus includes a wireless network central management unit included in a management plane of a switch and configured to perform a management procedure on the wired MAC/PHY protocols within the switch.
Abstract:
The present invention relates to an apparatus and a method for avoiding signal interference between access points (APs) in a non-license band, and more particularly, an interference avoidance apparatus and method between access points (APs) that avoid interference based on whether an overlapping basic service set (OBSS) is present, whether an overlapping operation channel between adjacent APs is used, whether it is possible to select a non-overlapping operation channel between adjacent APs, and the like.
Abstract:
Provided is a reflector/scatterer arranged around a side lobe beam which is generated from a transmission antenna, in a radiation direction of the side lobe beam, for use in expanding a communication service coverage area.
Abstract:
Provided are a frame transmission method performed in an access point (AP), a frame reception method performed in a terminal, and an AP. The frame transmission method performed in an AP includes acquiring a channel for transmitting a first data unit of a first terminal, when a data unit to be transmitted to at least one terminal other than the first terminal is in the AP, generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including the first data unit and the data unit to be transmitted to the at least one terminal, and transmitting the PPDU to the first terminal and the at least one terminal. Accordingly, it is possible to improve the performance of a wireless local area network (WLAN).
Abstract:
Disclosed is an operating method of each entity in a coexistence management system that manages a plurality of frequency sharing devices. To perform operations of respective entities (a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS)), a state machine of the entities is defined as inactive, active, waiting engagement, engaged, request-sent, and request-received states.
Abstract:
An RF crossover structure includes a first and second independent transmission lines formed to cross with each other on a same surface of a dielectric substrate; first via-holes connected to the second transmission line so that the second transmission line is connected to a back surface from a front surface of the dielectric substrate and is connected again to the front surface of the dielectric substrate out of a crossing region at which the first and the second transmission lines are crossed. Further, the RF crossover structure includes CPW (Coplanar Waveguide) transmission lines used for a ground plane to improve a signal transmission property at the crossing region.