Abstract:
PURPOSE: A resource allocation method in a wireless communication system is provided to reduce interference between users by allocating a slot having the highest performance index among unoccupied slots in an OFDMA(Orthogonal Frequency Division Multiple Access) type ad-hoc system to a terminal. CONSTITUTION: A resource allocating device senses a subcarrier already being used by the other terminal among all of subcarriers(S410). The resource allocating device obtains a time error, a frequency error, and receiving power information of the occupied subcarrier(S420). The resource allocating device calculates an SINR(Signal-to-Interference plus Noise Ratio) of unoccupied subcarriers(S430). The resource allocating device allocates a subcarrier having the highest SINR among the unoccupied subcarriers to a terminal(S440). [Reference numerals] (S410) Sensing a subcarrier being used; (S420) Acquiring a time error, a frequency error, and receiving power information of the occupied subcarrier; (S430) Calculating SINR of unoccupied subcarriers; (S440) Selecting and allocating a subcarrier with the maximum SINR
Abstract:
PURPOSE: Access controlling method and device in a wireless communication system are provided to improve the reliability and the safety of network by avoiding the collision of neighing nodes in orthogonal frequency division multiple access(OFDMA)-based wireless mesh network. CONSTITUTION: Information with respect to following transmission timings of a 1-hop node and a 2-hop node is received through the 1-hop node(S501). The information calculates the following transmission time interval of the 1-hop node and the 2-hop node(S502). Based on the following transmission time interval, a sub-frame and a sub-channel corresponding to the following transmission timings are determined(S503 to S509). Information with respect to the following transmission timing with information with respect to the transmission timing of the 1-hop node is transmitted to the 1-hop node.
Abstract:
이동국은 피드백 자원 할당 정보를 수신하고, 하향링크 신호를 하향링크 전용 캐리어에서 수신한다. 이동국은 하향링크 전용 캐리어의 피드백을 위한 상향링크 가능 캐리어의 자원 영역 내에서 하향링크 전용 캐리어를 위한 피드백 자원 영역을 확인한다. 이동국은 하향링크 전용 캐리어를 위한 피드백 자원 영역 내에서 피드백 자원 할당 정보에 해당하는 피드백 채널 자원 영역을 확인한다. 이동국은 하향링크 신호에 대한 피드백을 상향링크 가능 캐리어에서 피드백 채널 자원 영역을 통해 전송한다.
Abstract:
PURPOSE: A method for generating bean forming vector considering adjacent cell interference is provided. CONSTITUTION: A method for generating bean forming vector comprises: a step of receiving information of first and second precoding matrixes from a serving base station(200); and a step of generating the beam forming vactor by linearly binding the first and second precoding matrixes. The first precoding matrix is a precoding matrix which maximizes transfer power from a terminal to serving base station. The second precoding matrix is a precoding matrix which minimizes interference power from the terminal to adjacent base station.
Abstract:
MIMO 시스템에서단말및 그동작방법이개시된다. 단말은기지국으로부터채널상태측정을위한기준신호를이용하여, 기지국으로부터송신되는신호와잡음의비인제1 값을계산하고, 기지국으로부터의간섭과잡음의비인제2 값을계산할수 있다. 그리고, 단말은제2 값과제1 값의비(ratio)를소정의임계치와비교하여비트정보를생성하고, 제1 값및 상기비트정보를기지국으로피드백할수 있다.
Abstract:
기지국은제1 타임슬롯과상기제1 타임슬롯이후의제2 타임슬롯을포함하는제1 서브프레임에설정된제1 CSI-RS 자원풀(pool)에, 상기제1 타임슬롯의 2번째 OFDM(Orthogonal Frequency Division Multiplexing) 심볼, 3번째 OFDM 심볼, 및 4번째 OFDM 심볼중 적어도 2개의 OFDM 심볼에대응하는다수의제1 자원요소(RE: Resource Element)를포함시킨다. 그리고상기기지국은상기제1 CSI-RS 자원풀에포함된 RE 중에서적어도하나를이용해 CSI-RS를전송한다.