Patent application number | Description | Published |
20110256897 | BASE STATION APPARATUS, USER EQUIPMENT AND PRECODING METHOD - The present invention provides a base station apparatus capable of preventing degrading of throughput performance even when feedback information amount on precoding in uplink MIMO transmission is reduced. This base station ( | 10-20-2011 |
20120140723 | BASE STATION APPARATUS AND INFORMATION FEEDBACK METHOD - To suitably transmit feedback information for rank adaptation and precoding in uplink MIMO transmission to a user apparatus as feedback, a base station apparatus ( | 06-07-2012 |
20120195264 | BASE STATION APPARATUS, MOBILE STATION APPARATUS AND TRANSMISSION POWER CONTROL METHOD - To suppress deterioration of throughput characteristics in the entire system even when a plurality of transmission antennas is placed in an indoor environment, a base station apparatus (eNode B) is provided with a power control matrix generating section ( | 08-02-2012 |
20130033979 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided are a mobile terminal apparatus, a radio base station apparatus and a radiocommunication method, capable of saving PHICH resources enough and realizing effective retransmission control of uplink SU-MIMO. The radio communication method of the present invention is characterized in that a radio base station apparatus receives signals of plural codewords, when there is an error in each of the codewords, generates a one-bit negative response physical HARQ indicator channel signal and transmits the physical HARQ indicator channel signal, and a mobile terminal apparatus receives the physical HARQ indicator channel signal and transmits retransmission signals of all the codewords to the radio base station apparatus based on the negative response physical HARQ indicator channel signal. | 02-07-2013 |
20130034066 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL DEVICE AND WIRELESS COMMUNICATION METHOD - To provide a radio base station apparatus, mobile terminal device and wireless communication method for enabling the SRS to be used efficiently in an LTE-A system, a wireless communication method of the invention is characterized in that a radio base station apparatus performs OFDM modulation on a transmission signal including transmission information on sounding reference signals for each transmission antenna, and transmits the OFDM-modulated transmission signal, and that a mobile terminal device receives the signal including the transmission information, controls a transmission aspect of the sounding reference signals for each transmission antenna based on the transmission information, and transmits the sounding reference signals in the transmission aspect for each transmission antenna. | 02-07-2013 |
20130058279 | DATA TRANSMITTING METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - The data rate in MIMO transmission is increased to a maximum even when a number of transmitting antennas of a base station apparatus is different from the number of transmitting antennas of the base station apparatus supported by a mobile station apparatus. The base station apparatus (eNodeB) reports the number of transmitting antennas provided for the base station apparatus to the mobile station apparatus UE (ST | 03-07-2013 |
20130083757 | DATA TRANSMITTING METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - A data rate in MIMO transmission is increased to a maximum even when the number of transmitting antennas of a mobile station apparatus is different from the number of transmitting antennas of the mobile station apparatus supported by a base station apparatus. The base station apparatus (eNodeB) reports the maximum number of supported antennas of the mobile station apparatus (UE) supported by the base station apparatus (eNodeB) to the mobile station apparatus (UE) (ST | 04-04-2013 |
20130182671 | COMMUNICATION CONTROL METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - To notify the control information necessary for uplink MIMO transmission while reducing overhead, generated is a UL grant having the PMI/RI field and non-transmission/swap flag field of 1 bit indicative of a transport block made non-transmission and the presence or absence of a swap of control information between two transport blocks corresponding to a value of the PMI/RI field, a downlink control channel signal including the UL grant is transmitted to a mobile station apparatus, and the transport block made non-transmission and the presence or absence of a swap of control information between two transport blocks is determined from the non-transmission/swap flag of the UL grant. | 07-18-2013 |
20130182672 | MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - The present invention provides a mobile terminal apparatus and a radio communication method which can feed back precoders that are essential to generate precoding weights in downlink MIMO transmission. With the present invention, in the first mode to feed back subband second PMIs that are selected per bandwidth part through a physical uplink control channel, a subband second PMI and a wideband second PMI are selected from a second codebook, the subband second PMI and the wideband second PMI are multiplexed on a subframe, and the multiplex signals is transmitted to a radio base station apparatus through the above physical uplink control channel. | 07-18-2013 |
20130182787 | COMMUNICATION CONTROL METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - In order to suppress deterioration of the throughput performance of the whole system in the MIMO system performing MIMO transmission, the present invention is characterized in that in a codebook in which there are defined a plurality of precoding weights and a plurality of PMIs (Precoding Matrix Indicators) assigned to the precoding weights, bit information of the PMIs assigned to the precoding weights is adjusted in such a manner as to suppress an effect of feedback error from a mobile station apparatus. The bit information of the PMIs assigned to the precoding weights is adjusted in such a manner as to suppress an effect of a transmission beam formed with a PMI in which feedback error is detected. | 07-18-2013 |
20130195035 | MOBILE TERMINAL DEVICE AND RADIO BASE STATION APPARATUS - Disclosed is a mobile terminal device and a radio base station apparatus capable of effectively feeding back PMIs by selecting a precoder using double codebooks W | 08-01-2013 |
20130215988 | FEEDBACK METHOD, MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS - The present invention makes it possible to generate precoding weights reliably, even in downlink MIMO transmission using a plurality of transmitting antennas. The present invention includes: a first feedback information selection section ( | 08-22-2013 |
20130230007 | FEEDBACK METHOD AND MOBILE TERMINAL APPARATUS - The present invention makes it possible to feed back PMIs that are required to generate precoding weights, while securing improvement of throughput performance, in downlink MIMO transmission using a plurality of transmitting antennas. With the present invention, in a mode to include a PTI (Precoder Type Indicator) in a PUCCH and feedback the PTI to a radio base station apparatus for downlink MIMO transmission using a plurality of transmitting antennas, the transmission cycle of feedback information corresponding to report 2 and report 3 when the value of the PTI is 0 are made different from the transmission cycle of feedback information corresponding to report 2 and report 3 when PTI=1 and the former feedback information and the latter feedback information are multiplexed, and the multiplexed signal is transmitted to the radio base station apparatus by the PUCCH. | 09-05-2013 |
20140362946 | RADIO BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to implement radio communication to maintain good communication quality even when the number of antennas provided in a radio base station apparatus is greater than the number of transmission layers of a downlink control channel, a broadcast channel, and cell-specific reference signals. When, from a radio base station apparatus ( | 12-11-2014 |
20150078289 | RADIO COMMUNICATION SYSTEM, MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to realize signaling of DM-RS sequence parameters for improving the flexibility of allocation of DM-RS resources in a system having complex cell structures. According to the radio communication method of the present invention, in a radio communication system supporting a system band formed with a plurality of component carriers by carrier aggregation, a radio base station apparatus allocates uplink DM-RS sequences per mobile terminal apparatus and per component carrier, and reports DM-RS sequence allocation information, and a mobile terminal apparatus generates DM-RS sequences using the allocation information reported from the radio base station apparatus. | 03-19-2015 |