Abstract:
무선 네트워크에서의 비콘 재전송장치, 비콘재전송방법 및 초기접속신청방법이 개시된다. 이 재전송장치 및 방법은 복수의 단말들이 시분할된 타임슬롯들로 구성된 슈퍼프레임을 통해 통신하는 무선 네트워크를 관리하는 관리장치로부터 무선 네트워크에서의 통신을 위한 비콘정보 및 슈퍼프레임의 타임슬롯 중에서 비콘 재전송을 위해 할당된 에코비콘슬롯을 가리키는 정보를 포함하는 비콘프레임을 수신하고 에코비콘슬롯 동안 비콘정보를 재전송한다. 본 발명에 따르면, 다양한 환경에서 비콘정보를 수신할 수 있게 하고, 비콘정보를 해당 네트워크 내부뿐만 아니라 인접한 외부네트워크까지 수신할 수 있게 함으로서 네트워크 간의 주파수 자원을 공유하고 효율적으로 사용할 수 있는 기반을 마련하고, 궁극적으로 네트워크 운용의 편의성 및 효율을 극대화할 수 있다. 인지 무선 시스템 (Cognitive radio system), WPAN(Wireless Personal area network), 비콘(Beacon), EBP(Echo Beacon Protocol)
Abstract:
PURPOSE: A data-transmit-receiving apparatus and method are provided to transmit high-capacity data with high-speed by transmitting and receiving high-speed data to point to point communications using a millimeter wave band. CONSTITUTION: A network interface card module(210) creates a number gigabit grade serial bit stream by bundling gigabit Ethernet data which is transmitted and received from a plurality of internet networks(200). The network interface card module processes data by changing the number gigabit grade serial bit stream into Ethernet data. A baseband module(230) processes the data which is changed in the network interface card module in a baseband. An RF(Radio Frequency) module(260) processes the data which is processed at the baseband module in an RF band.
Abstract:
고이득을 위한 카세그레인 안테나를 개시한다. 카세그레인 안테나는 전파를 방사하는 급전부; 급전부의 방사면에 대향하도록 방사된 전파를 반사하는 부반사판; 부반사판에 대향하도록 서로 다른 깊이의 복수의 요철부들이 형성되어 부반사판에서 반사된 전파를 다시 반사하는 주반사판을 포함한다. 본 발명에 따르면, 제작단가가 낮은 고이득 광대역 안테나를 구현할 수 있다. 안테나, 카세그레인, 오프셋
Abstract:
PURPOSE: A transceiving digital signal processing device for compensating gain flattening in band is provided to relax a standard about a flattening in band in realizing RF/IF circuit by improving gain flattening in band through an FIR filter in a transceiving unit of an existing system. CONSTITUTION: A transmission FIR(Finite Impulse Response) filter(411) performs shaping of the initial set data for converting an initial setting data into a signal having a predetermined pass band. A comparator(413) compares the converted initial setting data for generating a control signal and deterioration information which is feedback from a receiver.
Abstract:
PURPOSE: A device for communication between devices which has a different data transmission range is provided to perform communication without interference about other communication devices for communication devices which have different transmission range. CONSTITUTION: An access slots allocation unit(110) assigns access slots to a radio resource for DL(Down Link). A selection unit(130) selects a communication relay unit for the relay of relay data of a first short distance communication device.
Abstract:
PURPOSE: An apparatus and a method for scheduling a sensing channel in a wireless communication system are provided to calculate an evaluation value for channel quality using a channel ID, channel group classification, an incumbent user emergence frequency, an occupied channel of the shortest distance, and standby time of a channel, thereby scheduling channels through the evaluation value. CONSTITUTION: A sensing channel scheduling device(101) includes an evaluation value calculating unit(103), a sorting unit(107), and a scheduling unit(109). The evaluation value calculating unit calculates evaluation values about channel quality. The sorting unit sorts the evaluation values according to a preset reference. The scheduling unit schedules the order of the channels using the order of the sorted evaluation values.
Abstract:
PURPOSE: A slot antenna is provided to gain a high directionality and an omnidirectional radiation pattern by forming a plurality of slots on a ground plane of a strip transmission line. CONSTITUTION: A slot antenna includes a dielectric substrate(110), a ground plane and a pair of stubs(130). Micro strip transmission lines(160,170) and a strip transmit line(150) are formed on the dielectric substrate. The ground plane is respectively located on upper side and lower side of the dielectric substrate. The ground plane is connected through a plurality of ground vias(122,142) each other. A pair of stubs is arranged on the dielectric substrate as the fixed interval. An interval and a length of a pair of stubs are in inverse to a frequency.
Abstract:
PURPOSE: A fame compression method and an apparatus thereof are provided to reduce the length of a frame to enhance the data transmission rate in the data communication of a frame method. CONSTITUTION: A frame header analysis unit(610) extracts the information of a frame header duplicated among the frame data to be transmitted, and a specific preamble generating unit(630) generates a specific preamble mapped to the extracted frame header information. A frame header generating unit(620) generates a reduced frame header which excludes the extracted frame header information. A frame data generating unit(650) generates the reduced frame data including the specific preamble and the reduced frame header.
Abstract:
PURPOSE: An antenna is provided to improve a reliability of a transmitting/receiving module by changing a structure of a horn antenna unit. CONSTITUTION: An antenna includes a horn antenna unit(110) and one or more mode changing unit(120). The horn antenna unit has a rectangular opening side. A lattice(130) is formed on the inner surface of the horn antenna unit. The mode changing unit is formed inside of the horn antenna unit into a stair shape. The mode changing unit connects the horn antenna unit with a micro strip transmission line. The micro strip transmission line is formed on a dielectric substrate(140). One side of a contact unit is connected to an end part of the mode changing unit. The other side of the contact unit is connected to the micro strip transmission line.
Abstract:
PURPOSE: A method and an apparatus for data fusion are provided to apply a signal existence judgment value and a weight value to a data integration method. CONSTITUTION: An information reception unit(410) receives the sensing information including a conviction estimation parameter value which indicates the confirmation degree of a value for the signal existence from a sensing device. A relative importance reflecting unit(420) generates a weight value based on the confirmation estimation parameter value, and a reliability calculating unit(430) calculates a characteristic value which indicates the reliability of the sensing information transmitted from each sensing device by using the weight value.