摘要:
A terminal device includes communication means for carrying out communication with a base station device, and generation means for generating a rank indicator specifying a preferred rank, first partial precoder information and second partial precoder information specifying a preferred precoder, and a reception quality indicator specifying a preferred transmission rate. In a first feedback mode in which reception quality information is reported periodically to the base station device, the communication means reports the second partial precoder information and the reception quality indicator at first timing, and reports the rank indicator and the first partial precoder information at second timing different from the first timing. In a second feedback mode in which the reception quality information is reported aperiodically to the base station device, the communication means reports the rank indicator, the first partial precoder information, the second partial precoder information, and the reception quality indicator at the same timing.
摘要:
An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station.
摘要:
In a communication system in which cooperative communication is performed, adaptive control is performed efficiently relating mainly to precoding processing. There are included, in an anchor base station 1201, steps of: generating a first channel state measurement reference signal, determining precoding processing fora data signal to be transmitted to a mobile terminal 1203 based on feedback information, and adaptively performing precoding processing on a data signal based on the determined precoding processing, in a cooperative base station 1202, steps of; generating a second channel state measurement reference signal and performing precoding processing specified in advance on a data signal to be transmitted to the mobile terminal 1203, and, in the mobile terminal 1203, a step of generating feedback information based on the measured first channel state and second channel state.
摘要:
A transmission device includes: a transmitting unit that transmits a common reference signal and a receiving device-specific reference signal to a receiving device; a selecting unit that selects either a first mode reporting a receiving quality using only the common reference signal or a second mode reporting a receiving quality using at least the receiving device-specific reference signal; and a notifying unit that notifies a mode selected by the selecting unit to the receiving device.
摘要:
An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station.
摘要:
A mobile communication system comprised of one or a plurality of base station apparatuses and a mobile station apparatus; characterized in that the one or plurality of base station apparatuses positions one or a plurality of logical antenna port reference signals, which are inside one or a plurality of logical antenna ports respectively, to different sub-frames; and the mobile station apparatus uses the logical antenna port reference signals of the one or plurality of logical antenna ports to perform channel status measurement.
摘要:
A CQI control unit 401 inputs, to a subchannel selecting unit 402, subchannel estimation values for report bands which are based on control information received from a control information separating unit 221, at report timings based on the control information. The subchannel selecting unit 402 selects a predetermined number (M) of subchannels on the basis of the received subchannel estimation values, and inputs information indicating the selected subchannels and the qualities of the selected channels to a CQI constructing unit 403. Based on a predetermined format, the CQI constructing unit 403 constructs CQIs by using the qualities of the selected channels and the information indicating the selected channels, and inputs the CQIs to the coding unit 210. Here, as the channel quality, an average value of each of SNR, SINR, and CINR of subcarriers belonging to the subchannel is used. Alternatively, the poorest quality among the subcarriers included in the subchannel may be used as the channel quality of the subchannel, or information indicating the MCS required by the receiver may be used as the channel quality. In this way, it is possible to provide a method that enables the transmission of CQIs at their optimum intervals even in a case of a system using multiple discontinuous bands.
摘要:
An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station.
摘要:
To provide a communication terminal apparatus that efficiently transmits feedback on information regarding the reception quality and transmission form to a communication control apparatus. A communication terminal apparatus (200) has a terminal-side receiving section (218) that receives control information from a communication control apparatus, a reception quality measuring section (214) that measures reception quality of a plurality of slots, a transmission form selecting section (215) that selects a single transmission form from among a plurality of transmission forms to assign data to the plurality of slots based on a measurement result of measured reception quality, a feedback information generating section (216) that generates feedback information for notifying reception quality information indicating the reception quality in a plurality of slots and transmission form information for designating a selected transmission form, and a terminal-side transmitting section (217) that transmits the generated feedback information to the communication control apparatus.
摘要:
A terminal is disclosed that includes a higher layer processing circuitry, a channel measurement circuitry, and a transmitting circuitry. The terminal is configured to set a first parameter and a second parameter measurement. The channel measurement circuitry is configured to perform a measurement of a reference signal received power based on a first reference signal in a case that the first parameter is configured in a measurement configuration, and perform a measurement of a reference signal received power based on a second reference signal in a case that at least the second parameter is configured in the measurement configuration. The transmitting circuitry is configured to report a first measurement report.