Patent application number | Description | Published |
20090233571 | DIVERSITY RECEIVER AND METHOD FOR CONTROLLING DIVERSITY RECEIVING OPERATION - Power consumption is reduced in a diversity receiver. A diversity receiver ( | 09-17-2009 |
20100294052 | HAND PHANTOM FOR EVALUATING MOBILE COMMUNICATION APPARATUS - A hand phantom for evaluating a mobile apparatus disclosed wherein the hand phantom includes a thumb part, an index finger part, a middle finger part, a ring finger part and a pinky finger part, and in an XY coordinate system where for the mobile apparatus being held, an orientation of a thumb along a width direction of the mobile apparatus is defined as a +X direction, an orientation of a bottom edge of the mobile apparatus along a longitudinal axis of a body of the mobile apparatus is defined as a +Y direction, and a center of a pointing device array of the mobile apparatus is defined as a coordinate origin, the thumb part is arranged within a range of ±6.2 mm in the X direction and ±12.1 mm in the Y direction around a coordinate (X, Y)=(−1 mm, 7 mm) in the XY coordinate system. | 11-25-2010 |
20110080884 | COORDINATED TRANSMISSION METHOD, COORDINATED TRANSMISSION SYSTEM, CENTRAL STATION AND RADIO BASE STATION - A coordinated transmission method of the invention has the steps of selecting a directional pattern corresponding to an area in which a radio terminal locates, from among a plurality of directional patterns determined respectively corresponding to a plurality of resources in frequency domains where the plurality of directional patterns is configured so that a plurality of radio base stations surrounding the area transmits, to the area, directional beams of same frequency domain resources to face one another, while not transmitting the directional beams of the same frequency domain resources using the same frequency domain resources to areas adjacent to the area, and of distributing a signal to transmit to the radio terminal according to the selected directional pattern, determining a frequency domain and directions of directional beams regarding the distributed signal, and delivering the signal to each of the plurality of radio base stations that simultaneously transmits the signal to the radio terminal. | 04-07-2011 |
20110085500 | RADIO COMMUNICATION SYSTEM, RADIO TRANSMITTING APPARATUS AND RADIO RECEIVING APPARATUS - The present invention is a radio communication system in which a radio transmitting apparatus transmits a packet to a radio receiving apparatus using a HARQ scheme, including a moving speed acquiring unit configured to acquire a moving speed of a radio communication terminal which is the radio transmitting apparatus or the radio receiving apparatus, a selection unit configured to select a transmission method of an information bit and an error correction bit which are transmitted under the HARQ scheme based on the moving speed acquired by the moving speed acquiring unit, and a transmitting unit configured to perform initial transmission and retransmission of the packet according to the transmission method selected by the selection unit. | 04-14-2011 |
20110142102 | CHANNEL ESTIMATION DEVICE AND METHOD, DEMODULATION DEVICE AND METHOD, AND FADING FREQUENCY DECISION DEVICE AND METHOD - In this invention, a channel estimation value of data symbols of a data channel is calculated by weighting and averaging pilot symbols in a parallel time multiplexing method. Also, a channel estimation value of data symbols during each data symbol interval is calculated by dividing data symbols in a slot into a plurality of data symbol intervals, selecting pilot symbols suitable for calculation of a channel estimation value of data symbols during each data symbol interval and weighting and averaging that pilot symbols. Also, a fading frequency is detected based on an inner product value of pilot symbols. Weighting factors are changed based on the detected fading frequency. Also, a channel estimation value is calculated by weighting and averaging pilot signals using a plurality of weighting sequences. The calculated channel estimation value is used to demodulate received data. The output data with the highest quality is selected by judging reliability of these plurality of demodulated data. It is also possible to select some weighting sequences based on the result of the reliability judgment of the demodulated data for predetermined period of time. In this case, after the selection, demodulation is performed by using these selected weighting sequences only. | 06-16-2011 |
20110188540 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a radio communication system which includes a plurality of radio base station apparatuses that transmit reference signals orthogonal to each other among a plurality of transmitting antennas and a mobile terminal apparatus that performs channel estimation based on the reference signals transmitted from the plurality of radio base station apparatuses, sets priority among a plurality of neighboring radio base station apparatuses and introduces a bias in the number of reference signals that can be allocated to each radio base station apparatus according to the priority from the radio resources shared among the plurality of neighboring radio base station apparatuses. | 08-04-2011 |
20120026955 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - A radio communication apparatus and radio communication method are provided which coordinates a plurality of radio base station apparatuses in consideration of interference cancelling capability of mobile terminal apparatuses, and can thereby improve the throughput of the entire system even when the amount of information shared among a plurality of radio base station apparatuses is small. Ina system that performs multicell coordinated transmission in downlink, a radio communication method according to the present invention selects a set of mobile terminal apparatuses whose interference can be cancelled from a plurality of mobile terminal apparatus, when a plurality of radio base station apparatuses perform joint scheduling, using interference cancelling capability information fed back from each mobile terminal apparatus; then performs joint scheduling for the set of selected mobile terminal apparatuses. | 02-02-2012 |
20120026956 | RADIO COMMUNICATION SYSTEM, CENTRALIZED STATION, CONTROL STATION APPARATUS, RADIO BASE STATION AND COORDINATED TRANSMISSION METHOD - The radio communication system of the present invention is provided with a cluster pattern determining section | 02-02-2012 |
Patent application number | Description | Published |
20090287970 | COMMUNICATION TERMINAL DEVICE AND RECEPTION ENVIRONMENT REPORTING METHOD - A communication terminal device and a reception environment reporting method produce a more excellent throughput, by making a report of a reception environment with higher accuracy. An SIR measuring section measures an SIR from a reception signal that has been received from a base transceiver station. A CQI converter converts the SIR that has been measured by the SIR measuring section into a CQI value. A BLER calculating section calculates a block error rate of the reception signal. A CQI correcting section corrects the CQI value that has been calculated by the CQI converter, in accordance with the block error rate. A CQI transmitter transmits the CQI value that has been corrected by the CQI correcting section, to the base transceiver station. | 11-19-2009 |
20090291688 | MOBILE TERMINAL AND METHOD USED IN THE SAME - A mobile terminal used in a cellular mobile communication system is disclosed. The mobile terminal includes a measuring unit configured to measure reception levels of received signals; an averaging unit configured to average the measured reception levels based on a forgetting factor; a cell reselection unit configured to reselect a cell based on the averaged reception level; and a factor determining unit configured to determine the forgetting factor according to parameters sent from a network. | 11-26-2009 |
20090305736 | MOBILE COMMUNCATION TERMINAL STATION AND TRANSMISSION POWER SETTING METHOD - A mobile communication terminal station is capable of transmitting a preamble part by use of optimal parameters for a moving speed of the mobile communication terminal station. The mobile communication terminal station is provided with a power ramping section. The power ramping section includes a moving state discrimination section for discriminating the moving state of the mobile communication terminal station and a power ramping transmission parameter selecting section for setting the transmission parameters in response to the moving state that has been discriminated. The preamble part indicating a transmission start of a message is transmitted to a base transceiver station, with the transmission parameters that have been set. | 12-10-2009 |
20100219884 | TRANSMITTER, RECEIVER, POWER AMPLIFICATION METHOD, AND SIGNAL DEMODULATION METHOD - There is provided a transmitter including a nonlinear input-output conversion characteristic control unit configured to determine a nonlinear input-output conversion characteristic for converting a signal depending on a usage status of a frequency band; an amplitude control unit configured to convert an amplitude of the signal based on the determined nonlinear input-output conversion characteristic; and a transmission power amplification unit configured to amplify power of the signal with the converted amplitude. There is also provided a transmitter including a nonlinear input-output conversion characteristic control unit configured to determine a nonlinear input-output conversion characteristic for converting a signal depending on a usage status of a frequency band; plural transmission power amplification units having different nonlinear input-output conversion characteristics; and a selecting unit configured to select one of the plural transmission power amplification units based on the determined nonlinear input-output conversion characteristic. | 09-02-2010 |
20110275337 | DIVERSITY RECEIVER AND METHOD FOR CONTROLLING DIVERSITY RECEIVING OPERATION - Power consumption is reduced in a diversity receiver. A diversity receiver ( | 11-10-2011 |
20130176979 | RADIO COMMUNICATION CONTROL METHOD, RADIO COMMUNICATION SYSTEM, RADIO BASE STATION, AND MOBILE TERMINAL - In each Mobile terminal, channel impulse characteristics from radio base stations to the mobile terminal is calculated. In a radio communication system, under the assumption that each of the mobile terminals performs optimum receiving beamforming in order to receive a data signal from a radio base station that actually sends the data signal to the mobile terminal, optimum receiving beamforming characteristics are estimated for each mobile terminal. Each of radio base stations that share optimum receiving beamforming characteristics calculates precoding characteristics for each mobile terminal according to the optimum receiving beamforming characteristics such that main beams are directed to mobile terminals to which the radio base station sends data signals and null beams are directed to mobile terminals to which the radio base station does not send data signals. | 07-11-2013 |
Patent application number | Description | Published |
20130122892 | MOBILE COMMUNICATION METHOD AND RELAY NODE - A mobile communication method according to the present invention includes a step in which, when a relay node RN, which is subordinate to a radio base station DeNB and is in an “RRC_CONNECTED state”, received an “RRC connection release message” from the radio base station DeNB, the relay node RN is transitioned to an “RRC_IDLE state” after transmitting an “RRC connection release message” to a mobile station UE, which is subordinate to the relay node RN and is in the “RRC_CONNECTED state”, and a predetermined time T2 elapses. | 05-16-2013 |
20130148538 | MOBILE COMMUNICATION TERMINAL - A mobile communication terminal including multiple receiving antennas demodulates an interfering UE-specific reference signal that might be used in another mobile communication terminal, and analyzes interference parameters specified by the interfering UE-specific reference signal demodulated by the interfering UE-specific reference signal demodulator, the interference parameters being parameters with regard to another beam sent to another mobile communication terminal from an interfering base station. Then, the mobile communication terminal calculates receiving weights so as to suppress influence to the desired beam from other beams, on the basis of desired beam parameters and the interference parameters. | 06-13-2013 |
20130163462 | MOBILE COMMUNICATION TERMINAL - A mobile communication terminal includes an interference rejection combining processor for obtaining a received signal vector with regard to each of multiple resource elements and for calculating receiving weights so as to suppress influence to a desired beam of electric wave sent from the desired base station by other beams, on the basis of the received signal vectors; a non-interference-rejection receiving weight calculator for calculating receiving weights so as not to suppress influence to the desired beam by other beams; a signal separator for separating a signal destined for the mobile communication terminal from signals destined for other mobile communication terminals; and an interference rejection combining determiner for determining whether the receiving weights to suppress influence by other beams or the receiving weights calculated by the non-interference-rejection receiving weight calculator should be used for signal separation by the signal separator, on the basis of an index representing a relationship between reception quality of a desired downlink transmission signal and reception quality of an interfering signal. | 06-27-2013 |
20130170428 | MOBILE COMMUNICATION METHOD, RADIO BASE STATION, AND RELAY NODE - A mobile communication method according to the present invention includes a step of transmitting, by a radio base station DeNB, “RA Response” to a mobile station UE within a “RA Response window” for the mobile station UE when “RA Preamble” is received from the mobile station UE, a step of transmitting, by a relay node RN, a signal to the mobile station UE in a subframe other than an MBSFN subframe, and a step of transmitting, by the radio base station DeNB, “RA Response” to the relay node RN in an MBSFN subframe of a “RA Response window” for the relay node RN when “RA Preamble” is received from the relay node RN. | 07-04-2013 |
20140314033 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION, MOBILE COMMUNICATION TERMINAL, AND COMMUNICATION CONTROL METHOD - A radio communication system includes multiple radio base stations and multiple mobile communication terminals. Each mobile communication terminal measures a reception quality of radio waves from each radio base station. A first mobile communication terminal that can execute interference rejection combining offsets the reception quality value of radio waves from a second radio base station by using a first bias value. A second mobile communication terminal that cannot execute interference rejection combining offsets the reception quality value of radio waves from the second radio base station by using a second bias value that is lower than the first bias value. The first radio base station selects, as the radio access point for the mobile communication terminal, a radio base station corresponding to a reception quality value indicating a best reception quality among the first reception power value and the offset second reception power value. | 10-23-2014 |
20150029951 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION, AND MOBILE TERMINAL - In a radio communication system including multiple mobile terminals and multiple radio base stations, the mobile terminal has a function of interference rejection combining. The radio base stations share downlink channel characteristics for mobile terminals connected to radio base stations. The radio base station gives weights to radio waves transmitted from multiple transmission antennas to perform in-phase addition of an interfering radio wave beam directed to a mobile terminal for which the desired radio base station is another radio base station to an interfering radio wave beam transmitted from yet another radio base station for limiting the number of interfering radio wave beams that arrive at the mobile terminal. The radio base station does not perform in-phase addition when the number of interfering radio wave beams of which interference can be suppressed by the mobile terminal is equal to or greater than the number of radio base stations that send interfering radio wave beams to the mobile terminal. | 01-29-2015 |