Abstract:
PURPOSE: A device for measuring a thermal noise power in a mobile communication system is provided to output a silence period signal by removing an error value from a power value, and to output the silence period signal when a silence period starts, thereby exactly measuring a thermal noise power during the silence period and increasing the efficiency of the load control of a reverse link. CONSTITUTION: A power detector(301) measures an instant power value of a reverse link received from an antenna(ANT), and outputs the instant power value to an averaging unit(302). The averaging unit(302) integrates the instant power value, and outputs as a measured signal. A remover(500) outputs the measured signal to a controller(511). If a silence period control signal is received from the controller(511), the remover(500) removes an error signal to measure a substantial thermal noise power, and outputs the measured thermal noise power. The controller(511) reflects a newly received thermal noise power value on the current thermal noise power, and controls the reverse link during a non-silence period.
Abstract:
본 발명에 따른 기지국에서의 스마트 안테나를 이용한 송신 경로 선택 장치는,이동국으로부터 수신된 신호로부터 공간 스펙트럼을 획득하는 신호 처리부와, 상기 획득된 공간 스펙트럼으로부터 최대 수신 신호를 갖는 경로를 결정하는 최대 수신 신호 방향 결정부와, 상기 최대 수신 신호를 갖는 경로를 제외한 나머지 수신 신호 각각의 경로의 경로 손실을 계산하고, 상기 계산된 각각의 경로 손실을 이용하여 상기 최대 수신 신호를 갖는 경로에 대한 상기 나머지 수신 신호 각각의 경로의 상대적 경로 손실을 계산하고, 상기 계산된 각각의 상대적 경로 손실을 이용하여 상기 최대 수신 신호를 갖는 경로에 대한 상기 나머지 수신 신호 각각의 경로의 상대적 경로 손실의 예측값을 계산한 후, 상기 계산된 예측값이 미리 설정된 범위 이내인 수신 신호들의 경로를 선택하는 경로 선택부와, 상기 선택된 경로로 빔을 스위칭하여 전송하는 빔 전송부를 포함한다. 스마트 안테나, 경로 선택, 스위칭
Abstract:
An apparatus and a method for FOLRC(Forward link Outer Loop Rate Control) using a HARQ(Hybrid Automatic Repeat Request) scheme in mobile communication systems are provided to obtain an adaptive link table by adjusting a CINR(Carrier to Interference and Noise Ratio) value based on reception success check information of packets. A method for FOLRC(Forward link Outer Loop Rate Control) using a HARQ(Hybrid Automatic Repeat Request) scheme in mobile communication systems comprises as the followings. Reception success check information of packet, which is transmitted to a previous frame, is received from a terminal(203). When an acknowledge signal as reception success check information of the packet is received, an offset value for adjusting a CINR value of a link table on the terminal is decreased(207). When reception success check information except for the acknowledge signal is received, the offset value is increased(209).
Abstract:
An apparatus and a method for canceling interference in a broadband wireless access system are provided to remove interference by an adjacent cell in an uplink to reduce the operating point of the uplink, thereby transmitting uplink data with low power and saving the power of a terminal. A method for canceling interference comprises the following steps of: configuring a receiving vector(Y), the channel matrix(HD) of desired signals, and the channel matrix of interference signals(301); arranging the channel matrix of interference signals in the order of a channel size(303); connecting the HD and the arranged channel matrix of the interference signals to reconfigure the entire channel matrix(HAIC)(305); operating the metric of a k-numbered interference channel in the reconfigured HAIC(307); operating an interference removing a filter coefficient(W) based on ZF(Zero Forcing) if the metric is greater than or equal to a reference value(311); and removing interference(313).
Abstract:
통신 시스템에서 송신기는 데이터 송신을 위해, 전력 부스팅 영역을 통해 데이터를 송신할 수신기를 선택하고, 상기 선택된 수신기들의 데이터를 상기 전력 부스팅 영역을 통해 송신할 데이터로 결정하고, 상기 데이터를 전력 부스팅하여 송신하기 위한 전력 부스팅 영역을 생성하고, 상기 생성된 전력 부스팅 영역에 상기 데이터를 할당한 후 상기 전력 부스팅 영역을 전력 부스팅하여 송신한다. 전력 부스팅(power boosting), 전력 부스팅 영역, 데이터, 맵
Abstract:
An apparatus and a method for generating a sub-channel in a communication system are provided to secure diversity performance by generating the sub-channel using EPUSC(Evolutionary Partial Usage of Sub-channel) tiles. A method for generating a sub-channel in a communication system includes the steps of: generating at least one tile to be included in the sub-channel(311); mapping data sub-carriers on the sub-channel including the at least one tile; rotating the sub-channel by a sub-channel rotation period to include the continuous tiles along a time axis(315); and generating the sub-channel by mapping a pilot sub-carrier on the rotated sub-channel(327).
Abstract:
A data transmission device in a communication system is provided to enable a transmitter to operate a power boosting region as transmitting data through the power boosting region, thereby preventing resources from being wasted as avoiding data loss during data transmission. Data to be transmitted through a power boosting region is determined(411-415). The power boosting region for boosting the data with power and for transmitting the boosted data is generated(417,419). The data is allocated to the generated power boosting region, and the power boosting region is boosted with power so that the boosted region is transmitted(421,423).
Abstract:
본 발명은 광대역 무선 통신 시스템에서 정의된 적응 안테나 기술을 사용하는 통신 시스템에서 이동 단말기에게 전달되는 제어정보 및 데이터 전송 시스템 방법에 관한 것으로서, 이러한 본 발명은 무선 통신 시스템에서 정보 데이터 송수신 방법에 있어서, 기지국은 전송하고자 하는 정보 데이터를 제어정보와 사용자 데이터로 분리하고, 상기 제어정보와 사용자 데이터 각각에 서로 다른 변조 및 부호화를 적용하여 해당 이동 단말기로 전송하는 과정과, 이동 단말기는 상기 기지국으로부터 수신하는 정보 데이터의 변조 및 부호화 방식을 확인하고, 상기 변조 및 부호화 방식에 상응하여 전체 정보 데이터 복조 또는 제어정보 및 데이터의 각 변조 및 부호화 방식에 상응하여 독립적으로 복조하는 과정을 포함한다. OFDMA, AAS, 개인 맵(Private MAP), 데이터 버스트(Data Burst), MCS, 슬롯(slot)
Abstract:
A method and an apparatus for transmitting a broadcasting message in a mobile communication system are provided to enlarge a cell area of a base station by inserting a broadcasting message with a high MCS level between broadcasting messages with low MCS levels. An apparatus for transmitting a broadcasting message in a mobile communication system includes an MCS(Modulation and Coding Scheme) level determining unit(307), a coder(301), and a modulator(303). The MCS level determining unit determines an MCS level according to a transmission interval of the broadcasting message. The coder codes the broadcasting message according to a determined coding rate. The modulator modulates the broadcasting message according to the determined modulation scheme. The MCS level determining unit determines the MCS level as a first MCS level, when the transmission interval of the broadcasting message corresponds to a first interval. The MCS level determining unit determines the MCS level as a second MCS level, when the transmission interval of the broadcasting message corresponds to a second interval.
Abstract:
A power control apparatus in a wireless communication system and a method thereof are provided to execute UL(Uplink) power control more exactly in consideration of both UL channel quality information and DL(Downlink) channel quality information by calculating the average channel quality information using UL and DL channel quality information, transmitting the difference from a reference CINR(Carrier to Interference Noise Ratio) value to an MS(Mobile Station), and executing power control. A BS(Base Station) demodulates a CQICH(Common Quality Indicator CHannel) and acquires the first CINR(601). The BS measures the second CINR using a received signal(603). The BS calculates the average CINR using the first and second CINRs(605). Then the BS judges whether a message, of which UL_BURSTCID_Flag is set to "1", is received(607). If such a message is received from an MS, the BS measures a CINR offset, or the difference between a reference CINR and the average CINR, for the execution of power control(609). The BS creates a power control message containing the created CINR offset and transmits it to the MS(611).