Abstract:
광대역 고주파수 무선 시스템에서 가변 길이 헤더 정보 보호를 위한 프레임 생성 장치 및 방법을 제안한다. 본 발명의 실시 예에 따른 프레임 생성 장치는 프레임의 가변 길이의 헤더 길이를 수신 장치로 하여금 알 수 있도록 시그널링할 수 있다. 또는, 본 발명의 실시 예에 따른 프레임 생성 장치는 프레임의 가변 길이 헤더에 패딩 정보를 추가해서 고정 길이 헤더로 변환해서 가변 길이 헤더 정보를 보호할 수 있다. 가변 길이 헤더, 패딩 비트, 패딩 서브 헤더
Abstract:
중앙 제어식 MAC 기반의 무선통신 시스템에서 릴레이 디바이스를 이용한 데이터 송수신 장치 및 방법이 개시된다. 중앙 제어식 MAC 기반의 무선통신 시스템에서 릴레이 디바이스를 이용한 데이터 송수신 장치는 대응 디바이스와의 통신 경로와 릴레이 디바이스를 통한 통신 경로에 대한 채널 상태를 판단하는 채널 판단부와, 통신 경로들에 대한 채널 상태에 따라서, 통신 경로들 중 적어도 하나의 경로를 선택하는 경로 선택부와, 선택된 경로를 통해 데이터를 송수신하는 송수신부를 포함한다. LOS(Line of Sight), 릴레이 경로
Abstract:
PURPOSE: A parallel equalizing device is provided to equalize parallel data stream which is generated by parallelization of direct input data and to implement high speed data communication. CONSTITUTION: A serial-parallel converting unit(100) outputs a parallel data stream through serial-parallel conversion of serial input data. A plurality of sub equalizers of equalization units equalizes the parallel data stream. An output controlling unit(300) generates parallel output signals through selection of equalizing signals. A parallel-serial converting unit(400) generates serial output data through parallel-serial conversion.
Abstract:
PURPOSE: A high performance beam formation transmission and reception method based on a successive orthogonal diffusion code is provided to maintain an optimal beam formation performance by using a simple beam formation method. CONSTITUTION: A diffusion unit(100) diffuses a signal by using a successive orthogonal diffusion code. A pre-rake synthesizer(110) acquires channel information in a transmission and reception process. The pre-rake synthesizer receives pre-rake effects. A weighted value vector generating apparatus(350, 400) generates a weighted value vector. A beam forming block(120) applies the weighted value to the signal.
Abstract:
PURPOSE: A radio resource allocation method and a data transmission method thereof are provided to reduce data collision between a plurality of transmission devices for a contention time period. CONSTITUTION: A data transmission device(220) determines the priority of contention time period. The data transmission device receives permission for the contention time period from a resource allocation device(210) The data transmission device determines the use of the contention time period by comparing the priority with the permission. The data transmission device transmits data for the contention time period to a data receiving device(230) based on the result.
Abstract:
밀리미터파 대역에서 지향성 안테나를 사용하여 광대역 근거리 무선 통신을 수행하는 장치 및 방법에 관한 것으로서, 일실시예에 따른 광대역 근거리 무선 통신 방법은 소스노드와 릴레이노드 간의 링크 품질, 상기 릴레이노드와 상기 목적노드 간의 링크 품질 및 상기 소스노드와 상기 목적노드 간의 링크 품질에 기초하여, 릴레이 동작 타입(type)의 변경을 결정하고, 상기 릴레이 동작 타입의 변경이 결정되면, 릴레이 동작 변경 요청(Relay Operation Change request, ROC request) 메시지를 전송하며, 상기 릴레이 동작 변경 요청 메시지에 대응하는 릴레이 동작 변경 응답(Relay Operation Change response, ROC response) 메시지를 수신한다.
Abstract:
PURPOSE: A broadband local wireless communication device and method thereof are provided to use both a detour link using a relay node to a communication between a source node and a target node and a direct line between the source node and the target node. CONSTITUTION: A control unit(720) determines a first time interval and a second time interval for cooperated data frame transfer by considering packet transmission time to a target node from a source node. A transfer unit(740) transmits a frame to the relay node through a directed antenna pattern which is desired to a relay node in a start point of the first interval. The transfer unit transmits the frame to the target node through an antenna pattern which is desired to the target node after a predetermined time has passed from a starting point of the second time interval.
Abstract:
PURPOSE: A device for multiplex mode wide band wireless communication and method thereof are provided to process a plurality of digital signals transformed with a method requesting each communication service at once by mixing the signals at a range where the signals are not interfered to each other. CONSTITUTION: A baseband output unit(110) outputs a plurality of digital signals in parallel. An intermediate frequency processing unit(120) up-converts the outputted digital signal into a middle frequency at a range where the signals are not interfered to each other. A parallel-serial converter(130) changes the parallel digital signal, which is up-converted into a middle frequency, into a serial digital signal. A digital-to-analog conversion unit(140) changes the serial digital signal into an analog signal. A radio frequency process unit(150) changes the analog signal into a transmission frequency corresponding to the required communications service.
Abstract:
PURPOSE: A method and device for transceiving frames in a wireless communication system are provided to shorten time spent for transmitting an ACK frame and/ore a NACK frame, thereby increasing a data frame transmission rate. CONSTITUTION: A pre-cyclic redundancy check about a header(102) and a payload(104) is performed. Delay(L1) occurs in a receiving model of a receiving unit. Decoding delay(L2) of the header and decoding delay(L3) of the payload occur. The payload has delay as much as L1+L3. A receiving terminal transmits an ACK frame or a NACK frame to a transmission terminal. Error verification for all payloads is completed. The ACK frame or the NACK frame are transmitted.