Abstract:
PURPOSE: A device and method for processing a channel state measurement reference signal of a wireless communication system are provided to efficiently use the transmission power of all antenna ports. CONSTITUTION: A first OFDM(Orthogonal Frequency Division Multiplexing) symbol and a second OFDM transmit a CSI-RS(Channel State Information-Reference Signal). Partial PRBs transmit the CSI-RS within a system bandwidth. The partial PRBs are transmitted in a first CSI-RS pattern type. The other PRBs are transmitted in a second CSI-RS pattern type. The first CSI-RS pattern type transmits a CSI-RS about first antenna ports in a first OFDM symbol. The second CSI-RS pattern type transmits a CSI-RS about second antenna ports in a second OFDM symbol.
Abstract:
PURPOSE: A method and device for mapping and demapping a service in a wireless communication system are provided to solve a problem which is generated when mapping a resource element of a pair of precoded symbol. CONSTITUTION: A pair of symbols area precoded by selecting a symbol pair to be arranged inside an allocated resource block(1605). A pair of precoded symbols is arranged in a resource block(1607). An arranged symbol pairs is transmitted(1611).
Abstract:
PURPOSE: A method for transmitting an indicator about a reference signal pattern and precoding of continuously allocated resource blocks is provided to improve channel estimation and demodulation performance by informing a terminal of the application of two kinds of reference signal patterns or more. CONSTITUTION: The continuous allocation of resource blocks is determined(S910). The application of the same precoding is determined at each resource block(S920). The indicator which indicates whether to apply the same precoding is set as the same precoding application or the same precoding non-application(S940). The set indicator is transmitted to the terminal(S950).
Abstract:
PURPOSE: A method and an apparatus for generating and multiplexing of a control channel for inter-cell interference control in an OFDM system are provided to receive a control channel for controlling the interference between cells by multiplexing between allocation resource. CONSTITUTION: In a method and an apparatus for generating and multiplexing of a control channel for inter-cell interference control in an OFDM system, a resources block used for a control channel configuration is determined. A control channel is formed by mapping the control channel to the data channel region from a resource block. A configured control is transmitted. A control channel configuration process is performed by a resource element group unit comprised of more than resource element. The resource element group is preferentially allocated in the same resources block.
Abstract:
PURPOSE: A method and an apparatus for generating and multiplexing of control channel for inter-cell interference control in OFDM system are provided to minimize resource waste by receiving a control channel for controlling the interference between cells through multiplexing. CONSTITUTION: In a method and an apparatus for generating and multiplexing of control channel for inter-cell interference control in OFDM system, a base station RB resource is transmitted to Rel-10(LTE-A) terminal(1501). A terminal using ICIC is selected(1503). A base station forms a PCFICH based on PDCCH information(1505). The base station forms a channel for transmitting PDCCH to an LTE terminal or an LTE-A terminal. The base station forms a PDCCH-A channel(1509). The base station multiplexes PDCCH, PCFICH, and PHICH(1511). The base station forms the PDSCH(1513). The base station multiplexes a control channel and a data channel(1515).
Abstract:
PURPOSE: A resource assigning method in a LTE system is provided allow assigning the resource which has smaller unit than RB, thereby enhancing the capacity of service such as VoIP(Voice over Internet Protocol). CONSTITUTION: Both fourth SC-FDMA(Single Carrier-Frequency Division Multiple Access) and eleventh SC-FDMA within one sub frame becomes a SC-FDMA symbol(614) for transmitting exclusive RS(Reference Signal). The SC_FDMA symbol is a resource available for PUSCH(Physical Uplink Shared Channel) transmission. The last SC-FDMA symbol within the subframe is used for SRS(Sounding RS) transmission. The number of PUSCH RE(Resource Element)s are 132(=11×12) per RB(Resource Block). If it is extended CP(Cyclic Prefix), the number of SC-FDMA symbols comprising the sub frame reduces.
Abstract:
본 발명은 본 발명은 다중 안테나를 사용하는 통신 시스템에서 데이터를 송/수신하기 위한 장치 및 방법에 관한 것으로, 특히 다중 안테나를 사용하는 통신 시스템에서 공간 다중 전송을 위한 장치 및 방법에 관한 것이다. 본 발명에서는 ACM 방법과 채널 민감도 스케줄링 자원 관리 방법을 이용하는 OFDMA 시스템에서 시스템의 용량을 증대할 수 있고, 빔 성형, 공간 다중화, SDMA 등의 다양한 MIMO 기술을 적용하여 데이터 송/수신에 효율성을 증대시키기 위한 장치 및 방법을 제공한다. 또한 본 발명에서는 OFDMA 시스템에서 CSI 궤환 양을 줄일 수 있는 장치 및 방법을 제공한다. 공간 부호화, 공간 사전 부호화, 선택적 공간 사전 부호화.
Abstract:
PURPOSE: A multi-cell transmission diversity method and an apparatus for the same for compensating user data by presuming the channel of each virtual antenna are provided to support transmission diversity regardless of the number of transmission antennas. CONSTITUTION: First virtual antennas(411, 415) receive signal outputted from a first multiplexer. The first virtual antennas perform first type precoding of the received dignal. Second virtual antennas(413, 417) receive the signal outputted from a second multiplexor. Second virtual antennas perform the second type precoding of the received signal. A transmission antenna transmits the signal outputted from the first virtual antenna and the second virtual antenna to the terminal.
Abstract:
PURPOSE: A method and an apparatus for transmitting/receiving DL channels in a cellular communication system which supports bandwidth scalability are provided to improve downlink data transmission capacity because the apparatus has an exclusive sub band of an LTE-A(Long Term Evolution-Advanced) terminal but does not transmit an SCH(Synchronization Channel) and BCH(Broadcasting Channel). CONSTITUTION: A CCCH(Common Control Channel) symbol generator generates an SI symbol. A PDCCH(Physical Downlink Control Channel) subcarrier symbol generator(905) generates a control information symbol. A PDSCH(Physical Downlink Shared Channel) subcarrier symbol generator(906) generates a data symbol. A subcarrier symbol mapper(901) maps symbols outputted from the symbol generators according to a corresponding sub band. An IFFT(Inverse Fourier Fast Transform) unit(900) transmits processed sub band information.
Abstract:
본 발명은 단일 사용자 MIMO와 다중 사용자 MIMO의 동작을 모두 지원하면서 CQI 피드백 오버헤드(feedback overhead)가 증가하는 양은 크지 않도록 CQI 표현 및 피드백 방법을 제안한 것이다. 기본 MIMO 동작을 단일 사용자 MIMO나 다중 사용자 MIMO로 설정하면 기지국은 해당 MIMO 동작에 최적화되어 있는 MIMO CQI 피드백을 수신 받았을 수 있다. 그러나 스케줄러가 기본 MIMO 동작이 아닌 대안 MIMO 동작을 선택했다면 기지국은 기본 MIMO 동작을 위한 절대 CQI 피드백과 대안 MIMO 동작을 위한 상대 CQI 피드백을 토대로 대안 MIMO 동작에 필요한 CQI를 계산한다. 즉 본 발명은 기본 MIMO 동작에서는 정확한 CQI를 제공하여 최선의 동작이 가능하게 하고 대안 MIMO 동작에서는 차선의 동작이 가능하게 한다. 본 발명을 사용할 경우, 기지국은 단일 사용자 MIMO와 다중 사용자 MIMO의 동작을 동적으로 선택할 수 있기 때문에 자원 관리 효율을 높일 수 있다. 패킷 데이터, MIMO, CQI