摘要:
A method for transmitting channel information in a communication system is provided. The method comprises transmitting information representative of at least one reference signal for interference measurement. Further, transmitting physical downlink control information including an indicator for triggering channel information associated with one or more reference signal for interference measurement. Further, receiving channel information associated with the one or more reference signal for interference measurement based on one or more interference measurement of the one or more reference signal for interference measurement on a physical uplink shared channel. Further, transmitting information representative of at least one reference signal for channel measurement.
摘要:
A communication method of a receiver in a wireless communication system, the communication method comprising obtaining a rank indicator; obtaining a first precoding matrix indicator based on the rank indicator; obtaining a second precoding matrix indicator associated with the first precoding matrix indicator; when the rank indicator is 1, transmitting the rank indicator, and transmitting the first precoding matrix indicator obtained based on a subset of a first codebook, the second precoding matrix indicator and a wideband channel quality index (CQI); and when the rank indicator is 2, transmitting the rank indicator, and transmitting the first precoding matrix indicator obtained based on a subset {0, 2, 4, 6, 8, 10, 12, 14} of the first codebook, the second precoding matrix indicator and a wideband channel quality index(CQI), wherein when the rank indicator is 1 or 2, the first precoding matrix indicator is 3 bits, and the second precoding matrix indicator is 1 bit.
摘要:
An interference measurement method of a terminal is provided for facilitating downlink transmission in the mobile communication system based on Distributed Antenna System (DAS) in which multiple antennas controlled by a base station are distributed within the service area of the base station. The interference measurement method includes receiving channel measurement information and interference measurement information from a base station, receiving channel state information reference signals, calculating, when the received channel state information reference signal is for channel measurement, a received signal energy based on the channel measurement information and, when the received channel state information reference signal is for interference measurement, an interference based on the interference measurement information, generating channel quality information based on the received signal energy and the interference, and transmitting the channel quality information to the base station.
摘要:
An interference measurement method of a terminal is provided for facilitating downlink transmission in the mobile communication system based on Distributed Antenna System (DAS) in which multiple antennas controlled by a base station are distributed within the service area of the base station. The interference measurement method includes receiving channel measurement information and interference measurement information from a base station, receiving channel state information reference signals, calculating, when the received channel state information reference signal is for channel measurement, a received signal energy based on the channel measurement information and, when the received channel state information reference signal is for interference measurement, an interference based on the interference measurement information, generating channel quality information based on the received signal energy and the interference, and transmitting the channel quality information to the base station.
摘要:
Methods and apparatus are provided for beamforming and information feedback are provided. Signals for beams to be transmitted through corresponding antenna ports, are generated. The beams are formed by precoding the signals with beamforming vectors. The beams are sorted into a number of resource reuse groups based on a resource that is to be shared. The beams are transmitted, using resources allocated per group, to a receiver. Feedback information is generated on at least one antenna port, based on the received beams. The feedback information is transmitted to the transmitter. A beam is selected having a greatest gain for a transmitter using the feedback information. A transmission resource is allocated for the selected beam.
摘要:
A plurality of reporting modes used to report feedback information is provided. A transmitter and a receiver generate and share feedback information based on a corresponding reporting mode.
摘要:
Communication between a base station with multiple transmission antennas and a mobile station is provided. The base station and the mobile station may recognize or estimate, respectively, a channel between the base station and the mobile station, and update a previous codebook with a new codebook based on a variation of the channel. In this instance, the mobile station may provide feedback information to the base station using the new codebook, and the base station may generate a transmission signal for the mobile station using the new codebook and the feedback information.
摘要:
A communication method of a receiver in a wireless communication system, the communication method comprising obtaining a rank indicator; obtaining a first precoding matrix indicator based on the rank indicator; obtaining a second precoding matrix indicator associated with the first precoding matrix indicator; when the rank indicator is 1, transmitting the rank indicator, and transmitting the first precoding matrix indicator obtained based on a subset of a first codebook, the second precoding matrix indicator and a wideband channel quality index (CQI); and when the rank indicator is 2, transmitting the rank indicator, and transmitting the first precoding matrix indicator obtained based on a subset {0, 2, 4, 6, 8, 10, 12, 14} of the first codebook, the second precoding matrix indicator and a wideband channel quality index(CQI), wherein when the rank indicator is 1 or 2, the first precoding matrix indicator is 3 bits, and the second precoding matrix indicator is 1 bit.