Abstract:
Disclosed are an antenna apparatus and a hand over method using the antenna apparatus. The antenna apparatus includes multiple antenna devices forming multiple beams at a specific service area, and various antenna devices are arranged in multiple rows. The uppermost row of the multiple rows includes a smaller number of antenna devices than the lowermost row has, and a separation angle between beams formed by each antenna device included in the lowermost row is wider than a separation angle between the beams formed by each antenna device included in the uppermost row. Therefore, inter-beam interference can be minimized, and service disconnection can be prevented during the high speed movement of a terminal.
Abstract:
Disclosed are a method and an apparatus for transmitting and receiving data in a communications system using multiple antennas. The method of transmitting data from a base station comprises the steps of receiving information on a beam which causes interference, from a serving terminal; and transmitting control information to be used for cancelling the interference caused by the beam, to the served terminal. Accordingly, the interference may be controlled effectively in a communications system using multiple antennas.
Abstract:
광대역 고주파수 무선 시스템에서 군집 프레임의 응답 방법 및 장치를 제안한다. 본 발명의 실시예에 따른 광대역 고주파수 무선 시스템의 목적지 장치에서 군집 프레임의 응답 방법은, 군집 프레임을 수신하면 기설정한 시간 동안 군집 프레임에 포함된 부 프레임들을 판독하는 단계; 및 상기 기설정시간 동안 상기 군집 프레임의 판독결과에 대한 정보를 포함하는 응답 프레임 생성하는 단계를 포함한다. 광대역 고주파수 무선 시스템, 군집 프레임, 응답 프레임, 재전송
Abstract:
PURPOSE: A data transmission method using a variable clock is provided to transmit data with low power consumption. CONSTITUTION: A terminal assures channel bandwidth of a wireless communication network according to transmission rate of data to be transmitted by using wireless communication network (710). The terminal transmits the data by using the assured channel bandwidth (750). The assured channel bandwidth is proportional to the transmission rate of the data. The terminal determines an operation clock proportional to the transmission rate. The terminal transmits the data with the determined operation clock. [Reference numerals] (710) Secure channel band; (720) Secure motion clock; (730) Determine the way of modulation; (740) Modulate data; (750) Transmit data; (AA) Start; (BB) End
Abstract:
PURPOSE: A spatial multiplexing communication system is provided to transmit data by using a communication channel without interference. CONSTITUTION: A transmission device estimates distance between a receiving device and oneself (410). The transmission device selects a part of a plurality of activated transmission antennas. The transmission device inactivates the selected transmission antennas. The transmission device groups the plurality of activated transmission antennas into a plurality of groups (420). The transmission device transmits data to the receiving device by performing beam-forming as to each group. [Reference numerals] (410) Estimate distance; (420) Grouping antennas; (430) Transmit group information; (440) Receive channel rank; (450) Determine transmit beam; (460) Transmit data; (AA) Start; (BB) End
Abstract:
무선 시스템에서 디바이스 디스커버리 운용 방법 및 그 장치를 개시한다. 디스커버리 운용 방법은 디스커버리 디바이스가 디스커버리 스캐닝 구간에 대한 정보를 갖는 디스커버리 비콘을 전송하는 단계 및 이웃 장치로부터 상기 디스커버리 스캐닝 구간 내에 상기 디스커버리 비콘에 대한 응답 메시지를 수신하는 단계를 포함한다. 디스커버리, 디스커버리 비콘, 디스커버리 스캐닝
Abstract:
광대역 고주파수 무선 시스템에서 동영상 신호의 차별적 오류 보호를 위한 동적 링크 적응 방법 및 장치를 제안한다. 본 발명의 실시 예에 따른 동적 링크를 고려한 차별적 오류 보호 전송 장치는, 동영상 데이터를 입력 받으면 채널 상태를 고려하여 화소를 구성하는 화소성분 별로 비트 공간 크기와 중요도 구분하는 비트 분할 위치를 확인하고, 상기 화소성분 별로 중요도가 높은 정보에 상대적으로 많은 오류를 정정하는 오류 정정 부호화를 사용하도록 제어하는 차별적 오류 보호(UEP: Unequal Error Protection) 송신 제어기; 상기 UEP 송신 제어기의 제어에 따라 상기 동영상의 화소를 상기 화소성분 별로 중요도에 따라 구분하는 비트 분할기; 및, 상기 UEP 송신 제어기의 제어에 따라 중요도의 따라 상응하는 오류 정정 부호화를 사용하는 채널 코딩 유닛을 포함한다. 비압축 동영상, 광대역 고주파수 무선 시스템, 차별적 오류 보호, 채널 상태
Abstract:
PURPOSE: A contention based channel access method using a directional antenna in a broadband wireless communication system and a device thereof are provided to reduce the number of attempts for impossible communication. CONSTITUTION: An information collecting unit(610) receives contention section participation intention information and receiving antenna setup information from distribution devices in a network. A resource allocation scheduling unit(620) allocates resources. The resource allocation scheduling unit is divided into a beam forming available contention section and a beam forming unavailable contention section. A beacon generating unit(630) generates a beacon message including information about the beam forming available contention section and the beam forming unavailable contention section.
Abstract:
PURPOSE: A communication channel selection method in a wireless communication system is provided to receive a signal measurement result from a discovery device and request signal measurement about channel time through arranged antenna. CONSTITUTION: A communication device request the scan of channels between a discovered device and a communication device(310). The communication device receives a channel scan response message(320). The communication device selects a communication channel based on assigned resource information(330). The communication device requests the resources to the discovery device(340).
Abstract:
PURPOSE: A method and an apparatus for configuring protocol header is provided to effectively process protocol header information of a variable length in a receiving device by easily extracting variable length header information. CONSTITUTION: A variable length physical layer header(123) and a fixed length physical layer header(121) are composed. The fixed length physical layer header is encoded according to a first coding scheme. A header check sequence is generated in order to check the fixed length physical layer header, the variable length physical layer header and the combination of MAC header. The MAC(Media Access Control) header and HCS(Header Check Sequence) which are scrambled by scrambling the MAC header and HCS are generated. The variable length physical layer header, the scrambled MAC header and HCS are encoded according to a second coding scheme.