摘要:
A data transmission apparatus having a plurality of antennas in a frequency division multiplexing system is provided. The apparatus includes a demultiplexer for splitting first-type data into plural pieces of sub-data, a first precoder for mapping the plural pieces of sub-data to the plurality of antennas by applying a first weight, a second precoder for mapping second-type data with an attribute different from the first-type data to the plurality of antennas by applying a second weight, and a transmit processor for transmitting the first-type data together with the second-type data through the plurality of antennas. Coverage can be expanded, and different types of services can be concurrently provided and system management can be achieved with increased flexibility and reliability.
摘要:
Various methods and apparatuses for prioritizing operation of Relay Node are disclosed. A method for prioritizing the transmission and receipt of uplink signals in a relay node of a wireless communication system is presented. The method comprises determining radio resource requirements for receiving one or more access link signals and/or transmitting one or more backhaul link signal, determining the signal type of the one or more access link signals and/or determining the signal type of the one or more backhaul link signals, and selecting one of a transmitting mode operation and a receiving mode operation based on the radio resource requirements for receiving the one or more access link signals and/or transmitting the one or more backhaul link signals, and based on the signal type of the one or more access link signals and/or the signal type of the one or more backhaul link signals.
摘要:
A method and device for transmitting or transceiving data in a wireless system. The method includes: transmitting or transceiving a downlink signal by using a special subframe. The special subframe includes a first transmission period and a second transmission period. The first transmission period is set to transmit the downlink signal to the relay node or the terminal. The second transmission period is set to transmit the downlink signal to the relay node and is set to not decode a reference signal by the terminal.
摘要:
A method and apparatus for recovering a backhaul link failure between a base station and a relay node is provided. The relay node receives information on a plurality of relay subframes used for relaying signals between the base station and the relay node. When a backhaul link failure is detected, the relay node determines at least one reserved subframe except the plurality of relay subframes and receives information to recover the backhaul link failure on a control channel in the at least one reserved subframe.
摘要:
An apparatus and method for generating a codebook in a wireless communication system are disclosed. The codebook generation method includes determining one or more dominant singular vectors in a channel matrix for antennas and setting each of the dominant singular vectors as a random non-zero vector, generating a first codebook having codewords, a minimum distance between the codewords being maximized, using the random non-zero vector in a region that includes unit norm vectors each having a Euclidean distance to each of the dominant singular vectors, equal to or less than a predetermined value, generating a second codebook corresponding to a unitary matrix that rotates the random non-zero vector toward the dominant singular vectors, and generating a final codebook using the first and second codebooks.
摘要:
A method for interference alignment in wireless network having 3 transmitters and 3 receivers which are equipped with M antennas is provided. The method comprising: transmitting, performed by each of the 3 transmitters, a pilot signal known to the 3 receivers; estimating, performed by each of the 3 receivers, each channel from transmitter; transmitting, performed by each of the 3 receivers, feedback information to target transmitter; and determining, performed by transmitter 2 and transmitter 3, a precoding vector; wherein a degree of freedom (DoF) of a transmitter 1 is (M/2−α), a DoF of the transmitter 2 or the transmitter 3 is M/2.
摘要:
A wireless communications system and, more particularly, a method for uplink transmission control and an apparatus for the same in a wireless communications system are disclosed. In a method for performing uplink scheduling for a first user equipment by a first base station, the method includes the steps of receiving, from the first user equipment, information on a frequency band having an uplink interference occurring therein with respect to a second base station; and allocating an uplink resource for the first user equipment based upon the frequency band. Herein, the frequency band having an uplink interference occurring therein with respect to the second base station may be decided based upon uplink scheduling information on a second user equipment of the second base station, and the uplink scheduling information on the second user equipment of the second base station may be acquired by the first user equipment and transmitted to the first base station.
摘要:
A method of transmitting uplink control information of a user equipment in a wireless communication system is provided. The method includes: receiving reserved resource information that indicates a radio resource capable of transmitting the uplink control information; receiving a block subframe indicator that indicates a radio resource for transmitting a signal from a relay station to a base station; comparing a transmission-reserved subframe indicated by the reserved resource information with a block subframe indicated by the block subframe indicator; and transmitting the uplink control information in the transmission-reserved subframe if the transmission-reserved subframe does not overlap with the block subframe.
摘要:
A method and an apparatus for receiving or transmitting a signal of a relay station in a wireless communication system are provided. The relay station receives or transmits a signal using radio resources indicated by backhaul resource allocation information. In this case, the radio resources include a plurality of symbols in a time domain, and the plurality of symbols have boundaries which are shifted based on symbols included in a frequency band allocated to a macro user equipment. And the radio resources include a plurality of subcarriers in a frequency domain, and at least one subcarrier adjacent to the frequency band allocated to the macro user equipment among the plurality of subcarriers is set to a guard subcarrier.
摘要:
Provided are a method and apparatus for transmitting data in a wireless communication system. The method comprises the steps of: setting up a frame including both a control domain for transmitting scheduling information to a first terminal and a data domain for transmitting first data to the first terminal; and transmitting, to a second terminal, second data in the control domain. The frame comprises a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain. The control domain consists of a first number N (where N is any natural number equal to or less than 4) of OFDM symbols in the frame. The data domain consists of OFDM symbols other than a number N of OFDM symbols in the frame. The second data has a predetermined bit size.