Patent application number | Description | Published |
20090034638 | RADIO PARAMETER GROUP GENERATING APPARATUS, TRANSMITTER AND RECEIVER - An apparatus for generating sets of radio parameters includes a first deriving unit deriving a set of radio parameters for specifying a symbol including an effective symbol part with the same period as the effective symbol part specified by another set of radio parameters and a guard interval part with a different period from the guard interval part specified by the other set of radio parameters. The apparatus further includes a second deriving unit deriving a set of radio parameters so that an occupancy proportion of the guard interval part in a single symbol specified by another set of radio parameters is equal to an occupancy proportion of the guard interval part in a single symbol specified by the other set of radio parameters. | 02-05-2009 |
20120127911 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND TRANSMISSION POWER CONTROL METHOD - To provide a radio base station apparatus, mobile terminal apparatus and transmission power control method for enabling conventional inter-cell interference reduction techniques and ULCoMP to be used together, a radio base station apparatus of the invention is characterized by having a ULCoMP processing section ( | 05-24-2012 |
20120127961 | MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - To provide a mobile terminal apparatus and radio communication method for enabling feedback control information to be efficiently transmitted on uplink channels, a radio communication method of the invention is characterized by having in a mobile terminal apparatus the steps of receiving a signal for each of a plurality of component carriers from a radio base station apparatus, generating feedback control information for each component carrier from the signal, mapping the feedback control information for each component carrier to suitable radio resources based on the number of component carriers, the presence or absence of uplink transmission data, and the number of bits of control information to transmit as feedback, and transmitting an uplink transmission signal mapped to the radio resources. | 05-24-2012 |
20120155423 | RADIO BASE STATION DEVICE, MOBILE STATION DEVICE AND RADIO COMMUNICATION METHOD - Provided is a downlink reference signal structure suitable for increase in number of transmission layers. A radio base station device ( | 06-21-2012 |
20120163318 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - Provided are a mobile terminal apparatus, a radio base station apparatus and a communication method, capable of orthogonalizing uplink reference signals between plural antennas in MIMO transmission. The mobile terminal apparatus has a reference signal generator ( | 06-28-2012 |
20120163334 | RADIO COMMUNICATION CONTROL METHOD, RADIO BASE STATION APPARATUS AND MOBILE TERMINAL APPARATUS - To provide a radio communication control method suitable for transmitting a downlink shared channel and a downlink control channel for the shared channel with different base frequency blocks in a communication system in which a plurality of base frequency blocks is combined and the system band is thereby broadened, in the radio communication control method, when different component carriers are assigned to a PDCCH and a PDCCH, to actualize a DCI configuration with a CFI value included in DCI notified on the PDCCH, the DCI is provided with an additional field on which CFI value bits are set. Further, to actualize another DCI configuration with a CFI value included in DCI notified on the PDCCH, part of the DCI field is masked with the CFI value. | 06-28-2012 |
20120218962 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - To use CSI feedback information capable of sufficiently supporting MU-MIMO transmission and CoMP transmission in LTE-A systems, in a radio communication method of the invention, a radio base station apparatus ( | 08-30-2012 |
20120243402 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS, AND RADIO COMMUNICATION METHOD - To provide a mobile terminal apparatus, radio base station apparatus and radio communication method for enabling data signals and control information for a plurality of component carriers to be transmitted efficiently, a radio communication method of the invention is characterized in that a mobile terminal apparatus maps a retransmission response signal and another signal to different resources in a first mode for transmitting a retransmission response signal for each downlink CC of a plurality of downlink CCs, while mapping the retransmission response signal and another signal to the same resources in a second mode for transmitting a single retransmission response signal for a plurality of downlink CCs, and that the radio base station apparatus receives the uplink signal, preforms resource-demapping on each of the retransmission response signal and another signal mapped to different resources in the first mode, while performing resource-demapping on the retransmission response signal and another signal mapped to the same resources in the second mode, and demodulates the retransmission response signal. | 09-27-2012 |
20120263068 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - A mobile terminal apparatus, a radio base station apparatus and a radio communication method are provided which can perform optimum control during downlink CoMP transmission in an LTE-A system. The radio communication method according to the present invention includes steps of the mobile terminal apparatus receiving downlink signals including reference signals from a plurality of radio base station apparatuses associated with downlink CoMP, transmitting feedback information including the channel quality measurement results to the plurality of radio base station apparatuses, and steps of a radio base station apparatus receiving uplink signals including channel quality measurement results of a plurality of radio base station apparatuses associated with downlink CoMP and cell information on radio base station apparatuses whose average reception levels are within a first threshold range, and controlling, when there are radio base station apparatuses whose average reception level difference is within a second threshold range among radio base station apparatuses whose average reception levels are within the first threshold range, transmission power for both radio base station apparatuses. | 10-18-2012 |
20120300653 | 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 transmitting and receiving downlink channel quality measurement reference signals in consideration of orthogonalization among transmission antennas, orthogonalization among cells, and interference estimation of high accuracy, in a wireless communication method of the invention, a radio base station apparatus generates channel quality measurement reference signals, performs randomization processing on the channel quality measurement reference signals to be mutually non-orthogonal among at least a part of cells, and orthogonalizes the channel quality measurement reference signals among transmission antennas to transmit to a mobile terminal device together with control information, and the mobile terminal device receives a downlink signal including the control information and the channel quality measurement reference signal, extracts the channel quality measurement reference signal using the control information, and measures channel quality using the channel quality measurement reference signal. | 11-29-2012 |
20120314667 | BASE STATION APPARATUS, MOBILE STATION APPARATUS AND CONTROL INFORMATION TRANSMISSION METHOD - The present invention is directed to preventing the load to be required for blind detection in a mobile station apparatus (UE) from increasing and switching between SU-MIMO and MU-MIMO dynamically, even in the event the system bandwidth is expanded. The present invention has a DCI format selection section ( | 12-13-2012 |
20130028209 | MOBILE TERMINAL APPARATUS AND METHOD OF TRANSMITTING AN UPLINK CONTROL INFORMATION SIGNAL - To suppress and minimize changes from the method of transmitting an uplink control information in the LTE system, while supporting increases in the system band and increases in the transmission layer when there is a PUSCH signal transmitted in the same subframe, provided is a configuration for generating a UCI signal for a base station apparatus ( | 01-31-2013 |
20130034056 | MOBILE TERMINAL APPARATUS AND METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION SIGNAL - The present invention is provided to, when there is a PUSCH signal to transmit in the same subframe as a UCI signal, make the method of transmitting uplink control information in the LTE system adaptable to a broader system band and increase in transmission layers only by minor changes. A UCI signal is generated to a base station apparatus ( | 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 |
20130034068 | INFORMATION TRANSMISSION METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - Wideband transmission is performed efficiently using spectrum aggregation. When performing information transmission using spectrum aggregation that aggregates frequency spectra which are non-contiguous and in different frequency bands, first information requiring communication quality is allocated to an anchor spectrum with small path loss among different frequency spectra used for information transmission and transmitted to a mobile station apparatus (UE), and second information requiring lower communication quality than the first information is allocated to a payload spectrum having large path loss and transmitted to the mobile station apparatus (UE). | 02-07-2013 |
20130039305 | REFERENCE SIGNAL TRANSMISSION METHOD, MOBILE STATION APPARATUS AND BASE STATION APPARATUS - To efficiently use radio resources used in transmission of SRS, a base station apparatus (eNode B) transmits a scheduling grant including an instruction for transmission of a Sounding Reference Signal (SRS), and a mobile station apparatus (UE) transmits the SRS in response to the scheduling grant. The SRS is transmitted in the same subframe, another subframe or a previous subframe by the predetermined number of subframes as, immediately before, or before a subframe of a PUSCH (Physical Uplink Shared Channel) that the scheduling grant instructs to transmit. | 02-14-2013 |
20130039330 | USER EQUIPMENT TERMINAL, BASE STATION, AND UPLINK CONTROL CHANNEL CONFIGURATION METHOD - A user equipment terminal for transmitting an uplink control channel to a base station according to a single carrier scheme includes a reception determining unit configured to determine reception of data, which are transmitted from the base station according to scheduling, and generate a reception determination result as first control information; and a control information multiplexing unit configured to assign the first control information to a first radio resource positioned at an end of a system band and assign second control information, which is transmitted with a radio resource dedicated to the user equipment terminal, to a predetermined position in a second radio resource adjacent to the first radio resource, to multiplex the first control information and the second control information into the uplink control channel. The present invention also relates to a base station and an uplink control channel configuration method. | 02-14-2013 |
20130058293 | RADIO BASE STATION APPARATUS AND TRANSMISSION POWER CONTROL METHOD - The present invention provides a radio base station apparatus and a transmission power control method that do not deteriorate the uplink reception quality of cell-edge users when uplink MU-MIMO transmission is applied. The transmission power control method of the present invention includes the steps of: in a radio base station apparatus that performs space division multiplexing between users by uplink MU-MIMO transmission: controlling transmission power according to a number of MU-MIMO multiplexed users; and transmitting transmission power information to match the number of MU-MIMO multiplexed users; and in a mobile terminal apparatus: setting transmission power using the transmission power information; and transmitting an uplink signal by the transmission power. | 03-07-2013 |
20130100828 | TRANSMISSION POWER CONTROL METHOD AND MOBILE STATION APPARATUS - The present invention is directed to providing a transmission power control method and a mobile station apparatus that can adequately control the transmission power of a mobile station apparatus having a plurality of transmitting antennas. Uplink transmission power control for a mobile station apparatus having a plurality of transmitting antennas provides a step of measuring the path loss (PL) of at least one transmitting antenna in a plurality of transmitting antennas, a step of setting representative value path loss (PL′) based on the measured path loss values, a step of determining the total transmission power (P | 04-25-2013 |
20130100842 | TRANSMISSION POWER CONTROL METHOD, MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS - It is an object to provide a transmission power control method, mobile terminal apparatus and radio base station apparatus for enabling a mobile terminal apparatus that performs radio communications in a system band including a plurality of component carriers to suitably control uplink transmission power in each component carrier, and a transmission power control method of controlling uplink transmission power of a mobile terminal apparatus that performs radio communications in a system band including a plurality of component carriers is provided with the steps of receiving a transmission power control command generated in a radio base station apparatus, and applying the received transmission power control command to a plurality of component carriers in common and setting transmission power of each component carrier. | 04-25-2013 |
20130114501 | MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - A mobile terminal apparatus and a radio communication method are provided which can efficiently transmit feedback control information through a physical uplink control channel. The radio communication method according to the present invention uses a plurality of ACK/NACK control bits as data signals, adds cyclic shifts to a plurality of reference signal blocks of a plurality of time blocks in a physical uplink control channel format comprised of a plurality of time blocks, multiplies the plurality of reference signal blocks by orthogonal codes and transmits a control channel signal including reference signals by which orthogonal codes are multiplied to a radio base station apparatus through a physical uplink control channel. | 05-09-2013 |
20130114751 | USER EQUIPMENT AND CHANNEL STATE INFORMATION FEEDBACK METHOD - The present invention provides a user equipment and channel state information feedback method. The channel state information feedback method used in a coordinated multi-point system includes acquiring small-scale channel state information H′=[H′ | 05-09-2013 |
20130170406 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS AND MOBILE TERMINAL APPARATUS - Provided are a radio communication system, a radio base station apparatus and a mobile terminal apparatus to which duplex schemes are applied effectively in a communication system of which a frequency band is formed with a plurality of fundamental frequency blocks. In the radio communication system of which a frequency band allocated to radio communication between the radio base station apparatus and the mobile terminal apparatus is configured by adding or deleting fundamental frequency blocks, the fundamental frequency blocks of the frequency band have at least a first fundamental frequency block and a second fundamental frequency block, the first fundamental frequency block is used to perform FDD-based radio communication and the second fundamental frequency block is used to perform TDD-based or half duplex FDD-based radio communication. | 07-04-2013 |
20130176924 | MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - To provide a mobile terminal apparatus and radio communication method for enabling feedback control information to be efficiently transmitted on a physical uplink control channel, a mobile terminal apparatus of the invention receives downlink shared data channels parallel in a plurality of CCs, makes determinations on the downlink shared data channels about ACK/NACK/DTX, collectively codes determination results (states) of the plurality of CCs after reducing the number of states allowed to be notified individually, and performs signal processing on the coded data to be orthogonalized between users to transmit. | 07-11-2013 |
20130176928 | MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is directed to efficiently transmitting feedback control information in a physical uplink control channel in a communication system having a system band formed with a plurality of fundamental frequency blocks. The present invention has a demodulation section that demodulates downlink shared channel signals for each of a plurality of fundamental frequency blocks, a detection section that detects the state of a retransmission acknowledgement signal of each of the plurality of fundamental frequency blocks based on the demodulated downlink shared channel signals, and an uplink control channel processing section that maps the retransmission acknowledgement signals of the plurality of fundamental frequency blocks to an uplink control channel of a specific fundamental frequency block that is selected from the plurality of fundamental frequency blocks, and the uplink control channel processing section selects a plurality of allocated resources from the uplink control channel, and defines the states of the retransmission acknowledgement signals of the plurality of fundamental frequency blocks by bit information by phase shift modulation and channel selection information. | 07-11-2013 |
20130201849 | REFERENCE SIGNAL TRANSMITTING METHOD, MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS - It is an object of the present invention to provide a reference signal transmitting method, a mobile terminal apparatus and a base station apparatus capable of reducing influences on a PDCCH even when performing transmission control over an aperiodic reference signal for measuring channel quality. Downlink control information corresponding to each component carrier in which transmission control information of a reference signal for measuring channel quality is set is aggregated and assigned to a downlink control channel of a specific component carrier for a mobile terminal apparatus that performs radio communication in a system band containing a plurality of component carriers and transmitted, and when the mobile terminal apparatus controls transmission of the reference signal for measuring channel quality based on the transmission control information of the reference signal for measuring channel quality included in the received downlink control information, the downlink control information corresponding to each component carrier includes a bit field in which identifier information of the component carrier is set and the transmission control information of the reference signal for measuring channel quality is set in the bit field. | 08-08-2013 |
20130279440 | MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - To prevent a situation that communication operation becomes unstable resulting from erroneous detection of a PDCCH in a mobile communication system having a system band comprised of a plurality of base frequency blocks, in a mobile terminal apparatus ( | 10-24-2013 |
20130286996 | RADIO BASE STATION APPARATUS AND CONTROL INFORMATION DETECTION METHOD - To efficiently detect feedback control information on downlink shared data channel signals transmitted with a plurality of base frequency blocks also in the case of performing radio communications with a system band comprised of a plurality of base frequency blocks, it is a feature to have detecting sections ( | 10-31-2013 |
20130294279 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided are a mobile terminal apparatus, a radio base station apparatus and a radio communication method capable of making the most of the effects of the MIMO technique and the CoMP technique, when employing both of the techniques. According to the radio communication method of the present invention, a mobile terminal apparatus estimates downlink channel states using respective reference signals included in downlink signals from plural cells; selects PMIs using a codebook based on the channel states; estimates a phase difference between the cells based on the selected PMIs or the channel states; and transmits information of the phase difference and the selected PMIs to radio base station apparatuses of the respective cells. A radio base station apparatus receives an uplink signal including a PMI and the information of the phase difference between the cells; multiplies a transmission signal by a precoding weight corresponding to the PMI; adjusts the phase difference between the cells with use of the information of the phase difference between the cells; and transmits the transmission signal to a radio base station apparatus of another cell by coordinated multi-point transmission. | 11-07-2013 |
20130301486 | MOBILE TERMINAL APPARATUS, BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - To optimize operation of a mobile terminal apparatus when a Half-duplex FDD scheme is applied, the mobile terminal apparatus performs radio communications with a base station apparatus by HD-FDD, and when transmission timing of an uplink signal and reception timing of a downlink signal overlaps each other, selectively performs transmission processing of the uplink signal and reception processing of the downlink signal, based on a priority relationship defined between the uplink signal and the downlink signal. | 11-14-2013 |
20130308593 | USER TERMINAL, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention adequately controls feedback control information in uplink transmission in a system band formed with a plurality of CCs. The present invention provides a data information demodulation section, which demodulates downlink shared channel signals of CCs from a radio base station apparatus, a retransmission check section, which checks retransmission and outputs a retransmission acknowledgement signal in response to the downlink shared channel signal of each of the plurality of CCs, a control information demodulation section, which demodulates downlink control information and detects the number of transport blocks, and a channel selection control section, which, with reference to a mapping table in which combinations of retransmission acknowledgement signals for the downlink shared channel signals of the plurality of CCs are defined using a plurality of radio resources and phase modulation bit information, determines radio resources to use to transmit the retransmission acknowledgement signals from a radio resource of an uplink control channel of a specific CC, and changes the content of the mapping table according to the number of transport blocks of the specific fundamental frequency block. | 11-21-2013 |
20130322393 | RADIO BASE STATION APPARATUS, TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to provide a radio base station apparatus which can acquire CSI reports at appropriate times, and which can trigger CSI reports effectively. The radio base station apparatus of the present invention has: a PDCCH signal generating section ( | 12-05-2013 |
20140064244 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - The present invention is designed to provide a base station apparatus, a mobile terminal apparatus, a communication system and a communication method that cope with the shortage of downlink control channel capacity. For a mobile terminal apparatus that receives downlink signals using a resource region for downlink control signals and a resource region for downlink data signals, a base station apparatus is configured to set a plurality of virtual to resources for downlink control signals in a plurality of physical resources that are arranged in a frequency direction in the resource region for downlink data signals, and allocate the downlink control signals, in a distributed manner, between virtual resources of a relatively low frequency band side and virtual resources of a relatively high frequency band side in a plurality of virtual resources. | 03-06-2014 |
20140073341 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM - The present invention is designated to improve received quality in a mobile terminal apparatus when coordinated multiple-point transmission (CoMP)—in particular, DCS-CoMP—is adopted. With the radio communication method of the present invention, when dynamic cell selection-type coordinated multiple-point transmission is adopted, a radio base station apparatus increases transmission power in radio resources to transmit to a mobile terminal apparatus, transmits the increased transmission power to the mobile terminal apparatus as transmission power information and performs dynamic cell selection-type coordinated multiple-point transmission at the increased transmission power. | 03-13-2014 |
20140086189 | USER TERMINAL, RADIO BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - To provide a user terminal, radio base station apparatus, radio communication system and radio communication method that support increases in the number of users, a user terminal is provided with a reception section that receives a downlink control signal multiplexed into radio resources from the starting OFDM symbol to a predetermined OFDM symbol in a subframe, and a downlink control signal subjected to frequency division multiplexing with a downlink data signal into radio resources after the predetermined OFDM symbol, a retransmission check section that performs a retransmission check on the downlink data signal based on the downlink control signal subjected to frequency division multiplexing to output a retransmission response signal, and a selection section that selects a radio resource of an uplink control channel used in transmission of the retransmission response signal. | 03-27-2014 |
20140086201 | USER TERMINAL, RADIO BASE STATION, DOWNLINK CONTROL CHANNEL RECEIVING METHOD AND MOBILE COMMUNICATION SYSTEM - The present invention is designed such that it is possible to optimize the effect of improving the efficiency of use of radio resources even when the number of user terminals to be multiplexed over the same radio resources is further increased. A user terminal performs downlink communication with a radio base station using a PDCCH resource region and a PDSCH resource region. The user terminal detects the starting position of the radio resources where the PDSCH and the PDCCH are frequency-division-multiplexed in the PDSCH resource region in the time direction, and receives the PDCCH that is frequency-division-multiplexed over the radio resources starting from the detected starting position. | 03-27-2014 |
20140086202 | RADIO BASE STATION APPARATUS, USER TERMINAL APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - To provide a radio base station apparatus that enables the effect of improving usage efficiency of radio resources to be exerted sufficiently also in the case where the number of user terminals multiplexed into the same radio resources further increases, the radio base station apparatus performs communications using a first resource region for a downlink control channel subjected to time division, and a second resource region for a downlink data channel, and is characterized by being provided with generation sections ( | 03-27-2014 |
20140112253 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM - To enable a mobile terminal apparatus to correctly demodulate a data signal in the case of applying Coordinated Multi-Point transmission (CoMP), particularly, JP-CoMP, a radio communication method of the invention is characterized in that a radio base station apparatus generates information for demodulation of a data signal in a mobile terminal apparatus in applying Coordinated Multi-Point transmission, and transmits the information for demodulation to a mobile terminal apparatus that performs Coordinated Multi-Point reception, and that the mobile terminal apparatus receives the information for demodulation of a data signal, and demodulates the data signal subjected to Coordinated Multi-Point reception using the information for demodulation. | 04-24-2014 |
20140133418 | CHANNEL STATE INFORMATION REPORTING METHOD, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION SYSTEM - The present invention is designed to flexibly report aperiodic channel state information to a plurality of radio base station apparatuses to be coordinated, even when coordinated multiple-point (CoMP) transmission/reception is performed. | 05-15-2014 |
20140133434 | USER TERMINAL, RADIO BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to minimize the increase of user terminal power consumption even when downlink control channels are extended. A radio base station apparatus having: an allocation section that allocates downlink control information in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also allocates decoding control information that indicates a user terminal to perform a decoding process for the second control region, in the first control region; and a transmission section that transmits the downlink control information and the decoding control information; and a user terminal having: a receiving section that receives the downlink control information and the decoding control information from the radio base station apparatus; and a decoding section that controls the decoding process for the second control region based on the decoding control information received, are provided. | 05-15-2014 |
20140140316 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, RADIO BASE STATION APPARATUS AND USER TERMINAL - The present invention is designed to apply CoMP transmission/reception flexibly in a system band that is formed with a plurality of fundamental frequency blocks, improve received quality in user terminals, and also widen the system band. A first radio base station apparatus ( | 05-22-2014 |
20140233519 | RADIO COMMUNICATION SYSTEM, FEEDBACK METHOD, USER TERMINAL, AND RADIO BASE STATION APPARATUS - The present invention is designed to feed back channel state information, from which adequate received quality can be calculated, upon CoMP transmission. A radio communication system is provided, which includes a plurality of radio base station apparatuses and a user terminal which is configured to be able to communicate with the plurality of radio base station apparatuses, and, in this radio communication system, a radio base station apparatus (eNB) has a transmission section configured to transmit a reference signal for channel state measurement to a user terminal (UE), and a receiving section configured to receive channel state information generated in the user terminal (UE) based on the reference signal, and the user terminal (UE) has a channel state information generating section configured to be able to generate a plurality of pieces of channel state information, including channel state information from which interference from a coordinated cell is cancelled, when the plurality of radio base station apparatuses coordinate and perform transmission, and a transmission section configured to transmit the plurality of pieces of channel state information to the radio base station apparatus. | 08-21-2014 |
20140254539 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed such that, in a heterogeneous environment where the same cell identification information is used, it is possible to identify from which cell a downlink signal has arrived, in a user terminal, and thereby maintain the accuracy of reception. The radio communication method according to the present invention includes the steps of: at the radio base station apparatus: generating a demodulation reference signal sequence using a pseudo-random sequence including a user-specific parameter; and transmitting user-specific information for determining the user-specific parameter and the demodulation reference signal sequence to the user terminal; and at the user terminal: determining the user-specific parameter using the user-specific information for determining the user-specific user parameter transmitted from the radio base station apparatus, and identifying a demodulation reference signal sequence using a pseudo-random sequence that uses the user-specific parameter; and demodulating a received signal using the identified demodulation reference signal sequence. | 09-11-2014 |
20140293947 | RADIO COMMUNICATION SYSTEM, USER TERMINAL AND RADIO COMMUNICATION METHOD - To ensure stable operation of a user terminal even in the case where the user terminal is instructed to transmit uplink signals at different transmission timings with a plurality of component carriers, in a radio communication system provided with a radio base station apparatus that indicates transmission timings of uplink signals for each component carrier, and a user terminal that transmits an uplink signal at a transmission timing set based on transmission timing information indicated from the radio base station apparatus and the like, it is a feature that the radio base station apparatus indicates different transmission timing information in a plurality of component carriers, and that the user terminal avoids simultaneous transmission of uplink signals in the case of performing communications using a plurality of contiguous component carriers. | 10-02-2014 |
20140301286 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to provide a radio base station apparatus, a mobile terminal apparatus, a radio communication system and a radio communication method which can cope with an increased number of users. A radio base station apparatus is provided with: a signal generating section that generates a first downlink control signal and a second downlink control signal for a mobile terminal apparatus; a first multiplexing section that multiplexes the first downlink control signal on a control region up to a predetermined number of symbols from the top of a subframe; a second multiplexing section that frequency-division-multiplexes the second downlink control signal on radio resources from the next symbol in the control region to the last symbol of the subframe; and a transmission section that transmits the first downlink control signal multiplexed on the control region and the second downlink control signal multiplexed on the radio resources. | 10-09-2014 |
20140301340 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, AND INTERFERENCE MEASUREMENT METHOD - The present invention is designed to measure interference with high accuracy, without changing the density of CSI-RSs, in a future system that does not reply on CRSs. A base station apparatus ( | 10-09-2014 |
20140307576 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND INTERFERENCE MEASUREMENT METHOD - To increase the number of CSI-RSs for interference measurement to improve interference measurement accuracy, a first reference signal for channel state measurement and a second reference signal for interference measurement are assigned to reference signal resources defined for transmission of the first reference signal, and a mobile terminal apparatus that supports both the first reference signal and the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal and the second reference signal. A second mobile terminal apparatus that supports the first reference signal and that does not support the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal, and of assignment information indicating that resources assigned the second reference signal are assigned a third reference signal of zero power for channel state measurement. | 10-16-2014 |
20140307630 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - To enable a user terminal to determine a cell of a downlink signal also in a heterogeneous environment using the same cell identification information, and thereby enable reception accuracy to be maintained, a radio communication method of the invention is characterized in that a radio base station apparatus generates a reference signal sequence by using a pseudo random sequence including user specific information, and transmits the reference signal sequence to a user terminal, and that the user terminal performs signal processing using the reference signal sequence transmitted from the radio base station apparatus. | 10-16-2014 |
20140307688 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, RADIO BASE STATION APPARATUS AND USER TERMINAL - The present invention is designed to effectively apply carrier aggregation and CoMP transmission/reception in a system band that is formed with a plurality of fundamental frequency blocks. A radio communication system where carrier aggregation is applicable in the same frequency band, and, this radio communication system includes the first radio base station apparatus and a second radio base station apparatus that perform coordinated multiple point transmission to a user terminal using cells having the same frequency band, and the first radio base station apparatus and the second radio base station apparatus perform retransmission control for uplink signals from the user terminal on a shared basis, and perform mapping of downlink signals to radio resources separately. | 10-16-2014 |
20140307689 | RADIO COMMUNICATION SYSTEM, MOBILE TERMINAL APPARATUS, WIDE AREA BASE STATION APPARATUS, LOCAL AREA BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to provide highly efficient local area radio access in a local area arranged in a wide area. A radio communication system has a wide area base station apparatus that covers a wide area, a local area base station apparatus that covers a local area arranged in the wide area, and a mobile terminal apparatus that communicates with the wide area base station apparatus by a radio communication scheme for the wide area, and that communicates with the local area base station apparatus by a radio communication scheme for the local area. The radio communication scheme for the local area is configured to utilize wide area control information that is used in the radio communication scheme for the wide area. | 10-16-2014 |
20140314036 | RADIO BASE STATION APPARATUS, USER TERMINAL, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - In a configuration in which a downlink control channel is enhanced, the present invention is designed to adequately allocate downlink control signals to radio resources for the enhanced control channel. An allocation section that allocates a downlink control signal to both of a first control region from the first OFDM symbol to a predetermined OFDM symbol in a subframe, which is a transmission time interval, and a plurality of second control regions, each of which is frequency-division-multiplexed with a data region in a region after the predetermined OFDM symbol and is formed in a predetermined resource block size, or allocates the downlink control signal only to the second control regions, and a transmission section that transmits the downlink control signals to a user terminal are provided, and the allocation section forms the plurality of second control regions such that each second control region includes a plurality of enhanced control channel elements, each of which is an allocation unit of downlink control information, and also divides the enhanced control channel elements, and performs distributed mapping such that the divided enhanced control channel elements are distributed over the plurality of second control regions of varying frequency bands. | 10-23-2014 |
20140369223 | COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION METHOD - The present invention is designed to detect an S-cell efficiently, in a short time, upon carrier aggregation in a HetNet. In a communication system where carrier aggregation is executed between a first carrier (CC #1) and a second carrier (CC #2), a macro base station apparatus ( | 12-18-2014 |
20140369224 | WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER TERMINAL, AND CHANNEL STATE INFORMATION MEASUREMENT METHOD - The present invention is designed to provide a wireless communication system, a base station apparatus, a user terminal, and a channel state information measurement method that can allow a user terminal to feed back channel quality information that is optimal for a transmission mode from a plurality of transmission points. A wireless communication system according to the present invention provides a base station apparatus having a determining section that determines resource information about resources to allocate the reference signal for measuring desired signals to, and resource for measuring interference signals, and a reporting section that reports the resource information to the user terminal, and the user terminal having a receiving section that receives the reported resource information, a measurement section that measures desired signals and interference signals based on the resource information, and a measurement section that measures the channel state using the measurement results of the measurement section. | 12-18-2014 |
20150029982 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to report parameters related to techniques provided for in the LTE-A system to a user terminal with adequate timing. The radio communication method of the present invention provides a radio communication method in a radio communication system having a base station apparatus that is configured in compliance with LTE-Advanced system standards, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, and, in this radio communication method, the base station apparatus generates downlink control channel information related to an enhanced physical downlink control channel, and notifies the downlink control channel information to the user terminal using an RRC Connection Reconfiguration signal, and the user terminal receives the RRC Connection Reconfiguration signal, and sets up the downlink control channel information. | 01-29-2015 |
20150043474 | RADIO BASE STATION APPARATUS, USER TERMINAL, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to provide demodulation reference signals that are suitable for an extended downlink control channel. The radio base station apparatus of the present invention has a multiplication section that multiplies downlink control information allocated to an extended downlink control channel resource region in a resource block, by a user terminal-specific weight, and a reporting section that reports one group, among a plurality of groups that are configured by selecting varying antenna ports from a plurality of antenna ports corresponding to the number of transmission layers of a demodulation reference signal, to the user terminal, and in each group, the extended downlink control channel resource regions in the resource block and the antenna ports to constitute the group are associated with each other, and the multiplication section multiplies a demodulation reference signal corresponding to an antenna port in the one group that is associated with the extended downlink control channel resource regions where the downlink control information is allocated, by the weight. | 02-12-2015 |
20150043476 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO RESOURCE ALLOCATION METHOD - The present invention is designed to provide a radio communication system, a radio base station apparatus, a user terminal and a radio resource allocation method that cope with the increase of the number of users. A radio base station apparatus is provided with a scheduling section ( | 02-12-2015 |
20150045085 | RADIO COMMUNICATION METHOD, LOCAL AREA BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION SYSTEM - A method for making the uplink and downlink coverages in a local area symmetrical by executing transmission power control in the downlink of a local area in HetNet is disclosed. A radio communication method is provided in which a local area base station apparatus, arranged in a wide area where a first carrier frequency is used and forming a local area that is narrower than the wide area, transmits a downlink signal, using a second carrier frequency, which belongs to a different frequency band from the first carrier frequency and which has a wider bandwidth than the first carrier frequency, the local area base station apparatus transmits a detection signal that is used to detect the local area base station apparatus in the mobile terminal apparatus, and the local area base station apparatus transmits the downlink signal for the mobile terminal apparatus with transmission power that is determined. | 02-12-2015 |
20150049699 | COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION METHOD - The present invention is designed to trigger a PUSCH dynamically or periodically in an S-cell upon carrier aggregation in a HetNet and transmit UCI efficiently. In the communication system of the present invention, a mobile terminal apparatus reserves physical uplink shared channel resources in a second carrier by higher layer signaling, and transmits uplink control information combining ACK/NACK for a physical downlink shared data channel allocated by a downlink scheduling assignment and a CQI report triggered by the downlink scheduling assignment, to a second base station apparatus, using one of the reserved physical uplink shared channel resources. | 02-19-2015 |
20150071200 | COMMUNICATION SYSTEM, BASE STATION APPARATUS AND COMMUNICATION METHOD - The present invention is designed to provide a communication system, a base station apparatus and a communication method that are suitable for carrier aggregation in a HetNet. In a communication system which provides a first transmission point ( | 03-12-2015 |
20150078281 | COMMUNICATION SYSTEM, MOBILE TERMINAL APPARATUS, LOCAL AREA BASE STATION AND COMMUNICATION METHOD - The present invention is designed to provide highly efficient local area radio access. A communication system, in which a mobile terminal apparatus ( | 03-19-2015 |
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 |
20150078325 | COMMUNICATION SYSTEM, LOCAL AREA BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION METHOD - The present invention is designed to provide a communication system, a local area base station apparatus, a mobile terminal apparatus and a communication method that can provide highly efficient local area radio access. In a communication system in which a mobile terminal apparatus performs radio communication with a wide area base station apparatus that covers a wide area, using a first carrier frequency, and performs radio communication with a local area base station apparatus that covers a local area, using a second carrier frequency, the wide area base station apparatus allocates different frequencies between the uplink and the downlink in the first carrier frequency and communicates with the mobile terminal apparatus, and the local area base station apparatus dynamically switches between the uplink and the downlink in the second carrier frequency on a per time basis based on the communication environment, and communicates with the mobile terminal apparatus. | 03-19-2015 |
20150085838 | RADIO COMMUNICATION METHOD, RADIO BASE STATION AND RADIO COMMUNICATION SYSTEM - A radio communication method is provided in which beam forming information for forming transmission beams directed from the small base station to the user terminal are generated based on position-related information of the user terminal acquired by communication between the macro base station and the user terminal using a coverage carrier and position-related information of the small base station, and the small base station precodes at least one of a common control signal and a reference signal that are common in a small cell (C2) based on the beam forming information and transmits the precoded signal from a plurality of transmitting antennas using a capacity carrier. | 03-26-2015 |
Patent application number | Description | Published |
20090154584 | APPARATUS AND METHOD FOR COMMUNICATION IN VARIABLE BANDS - A transmitter according to the present invention includes a mapping unit configured to convert transmitted data into data pieces associated with individual subcarriers, an inverse Fourier transform unit configured to convert the data pieces into a time-series signal, and a symbol generation unit configured to generate symbols for radio transmission from the time-series signal. The mapping unit associates the transmitted data with subcarriers different from predefined multiple subcarriers arranged at even intervals on a frequency axis. A demapping unit of a receiver according to the present invention supplies data comprising the data pieces associated with the subcarriers different from the predefined multiple subcarriers arranged at even intervals on a frequency axis as the data for restoration. | 06-18-2009 |
20100310025 | TRANSMITTING AND RECEIVING APPARATUSES AND METHODS - A transmitting apparatus which transmits a transmit symbol in orthogonal-frequency division multiplexing (OFDM) is disclosed. The transmitting apparatus includes a unit which provides a unicast channel; a unit which provides a multimedia broadcast multicast service (MBMS) channel; a unit which provides a specific pilot channel which is specific to a specified cell; a unit which provides one or more common pilot channels common to a plurality of cells; and a multiplexing unit which multiplexes the unicast channel, the MBMS channel, the specific pilot channel, and the one or more common pilot channels, and creates the transmit symbol, wherein the multiplexing unit time-division multiplexes, in the same frequency band, a unicast frame which includes the unicast channel, and an MBMS frame which includes the MBMS channel, and wherein an insertion density of the common pilot channel included in the MBMS frame is larger than an insertion density of the specific pilot channel included in the unicast frame. | 12-09-2010 |
20110038434 | RADIO PARAMETER GROUP GENERATING APPARATUS, TRANSMITTER AND RECEIVER - An apparatus for generating sets of radio parameters includes a first deriving unit deriving a set of radio parameters for specifying a symbol including an effective symbol part with the same period as the effective symbol part specified by another set of radio parameters and a guard interval part with a different period from the guard interval part specified by the other set of radio parameters. The apparatus further includes a second deriving unit deriving a set of radio parameters so that an occupancy proportion of the guard interval part in a single symbol specified by another set of radio parameters is equal to an occupancy proportion of the guard interval part in a single symbol specified by the other set of radio parameters. | 02-17-2011 |
20110216849 | TRANSMISSION APPARATUS AND TRANSMISSION METHOD - A transmitter transmits data to a communicating opponent with a better channel condition with use of one or more frequency blocks including one or more carrier frequencies. The transmitter includes a communicating opponent selection unit evaluating the channel condition for each frequency block for each of plural communicating opponents and selecting one or more communicating opponents from the plurality of communicating opponents, a modulation scheme determination unit determining at least a modulation scheme depending on the evaluated channel condition, a control channel generation unit generating a control channel indicative of the determined modulation scheme and one or more frequency blocks available for the selected communicating opponents to receive a data channel, and a channel transmission unit providing the selected communicating opponents with the control channel and the data channel modulated in accordance with the modulation scheme. | 09-08-2011 |
20110237285 | USER APPARATUS, BASE STATION, AND METHOD IN MOBILE COMMUNICATION SYSTEM - A disclosed user apparatus includes a random access channel generating unit configured to generate a random access channel; a control channel generating unit configured to generate a control channel in accordance with scheduling information received from a base station; and an uplink transmission signal generating unit configure to generate an uplink transmission signal including the random access channel or the control channel. Further, the purpose ID indicating at least whether there is a user ID uniquely allocated by the base station is included in the random access channel or the control channel. | 09-29-2011 |
20110249764 | RADIO PARAMETER GROUP GENERATING APPARATUS, TRANSMITTER AND RECEIVER - An apparatus for generating sets of radio parameters includes a first deriving unit deriving a set of radio parameters for specifying a symbol including an effective symbol part with the same period as the effective symbol part specified by another set of radio parameters and a guard interval part with a different period from the guard interval part specified by the other set of radio parameters. The apparatus further includes a second deriving unit deriving a set of radio parameters so that an occupancy proportion of the guard interval part in a single symbol specified by another set of radio parameters is equal to an occupancy proportion of the guard interval part in a single symbol specified by the other set of radio parameters. | 10-13-2011 |
20110261732 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, AND COMMUNICATION METHOD - A communication apparatus to be used for a newer system employing an FDD scheme in an area where an older system and the newer system coexist. The communication apparatus includes a first communication unit communicating at least a downlink data channel of the newer system using a frequency band belonging to a first frequency range (3.4-3.8 GHz); and a second communication unit communicating at least an uplink control channel of the newer system using a frequency band belonging to a second frequency range (2 GHz band) lower than the first frequency range. The second frequency range is used for uplink and downlink communications in the older system. | 10-27-2011 |
20120008584 | BASE STATION, COMMUNICATION TERMINAL, TRANSMISSION METHOD AND RECEPTION METHOD - A base station includes: means configured to manage frequency blocks; means configured to determine, for each frequency block, scheduling information for assigning one or more resource blocks to a communication terminal being in a good channel state; means configured to generate a control channel including the scheduling information for each frequency block; and means configured to frequency multiplexing control channels within the system frequency band and to transmit it. In addition, the base station transmits the control channel by separating a non-specific control channel to be decoded by a non-specific communication terminal and a specific control channel to be decoded by a communication terminal to which one or more resource blocks are assigned. | 01-12-2012 |
20120020321 | BASE STATION, COMMUNICATION TERMINAL, TRANSMISSION METHOD AND RECEPTION METHOD - A base station includes: means configured to manage frequency blocks; means configured to determine, for each frequency block, scheduling information for assigning one or more resource blocks to a communication terminal being in a good channel state; means configured to generate a control channel including the scheduling information for each frequency block; and means configured to frequency multiplexing control channels within the system frequency band and to transmit it. In addition, the base station transmits the control channel by separating a non-specific control channel to be decoded by a non-specific communication terminal and a specific control channel to be decoded by a communication terminal to which one or more resource blocks are assigned. | 01-26-2012 |
20120033632 | TRANSMISSION APPARATUS AND RECEPTION APPARATUS - A transmission apparatus used in a mobile communication system adopting a single carrier scheme in an uplink includes: multiplexing means configured to multiplex a pilot channel, a control channel, and a data channel; and transmission means configured to transmit a transmission symbol including at least the pilot channel and the control channel using the uplink. A first pilot channel used for a reception apparatus to measure channel state of the uplink is transmitted using a frequency band over a plurality of resource blocks. A second pilot channel for compensating for a channel transmitted by the uplink is transmitted by a resource block assigned to the transmission apparatus. Control channels of the transmission apparatus and the apparatus other than the transmission apparatus are orthogonalized with each other by a FDM scheme. | 02-09-2012 |
20120082261 | TRANSMISSION APPARATUS AND TRANSMISSION METHOD - A transmitter transmits data to a communicating opponent with a better channel condition with use of one or more frequency blocks including one or more carrier frequencies. The transmitter includes a communicating opponent selection unit evaluating the channel condition for each frequency block for each of plural communicating opponents and selecting one or more communicating opponents from the plurality of communicating opponents, a modulation scheme determination unit determining at least a modulation scheme depending on the evaluated channel condition, a control channel generation unit generating a control channel indicative of the determined modulation scheme and one or more frequency blocks available for the selected communicating opponents to receive a data channel, and a channel transmission unit providing the selected communicating opponents with the control channel and the data channel modulated in accordance with the modulation scheme. | 04-05-2012 |
20120127953 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS, AND RADIO COMMUNICATION METHOD - To provide a radio communication method for enabling a control signal to be received with high quality and high efficiency, in the case of using spatial multiplexing transmission in data signals to transmit, and also transmitting the control signal in the same sub-frame, in the radio communication method of the invention, a mobile terminal apparatus receives a downlink signal including precoding information, separates a data signal and a control signal to assign to different radio resources, and performs MIMO-transmission on a signal of each transmission layer based on the precoding information, and a radio base station apparatus receives an uplink signal including the data signal and the control signal subjected to MIMO transmission, divides the uplink signal into data signals for each transmission layer, and reproduces the control signal from the uplink signal. | 05-24-2012 |
20120140725 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - To enable an uplink control signal subjected to user multiplexing by an orthogonally multiplexing method using the cyclic shift to be user-demultiplexed, and further enable channel estimation accuracy to be improved, a radio communication method of the invention is characterized in that a mobile terminal apparatus provides a plurality of subcarriers with phase rotation amounts set to minimize the number of unit subcarriers for coherent averaging in association with the number of multiplexed users, and transmits an uplink control signal using the plurality of subcarriers provided with the phase rotation amounts, and that a radio base station apparatus receives the uplink control signal, performs coherent averaging on reference signal using the different number of unit subcarriers corresponding to the number of multiplexed users to demultiplex into a reference signal for each of the users, and estimates a channel variation using the demultiplexed reference signal. | 06-07-2012 |
20120230320 | TRANSMISSION APPARATUS, TRANSMISSION METHOD, RECEPTION APPARATUS AND RECEPTION METHOD - A disclosed transmission apparatus includes a multiplexing portion that multiplexes a common pilot channel, a shared control channel, and a shared data channel; a symbol generation portion that performs an inverse Fourier transformation on the multiplexed signal so as to generate a symbol; and a transmission portion that transmits the generated symbol. The multiplexing portion multiplexes the shared control channel including control information necessary for demodulation of the shared data channel including a payload and the common pilot channel to be used by plural users in a frequency direction, and the shared data channel in a time direction with respect to the common pilot channel and the shared control channel. Even when the number of symbols composing a transmission time interval (TTI) is reduced, transmission efficiency of channels excluding the common pilot channel can be maintained by reducing insertion intervals of the common pilot channel accordingly. | 09-13-2012 |
20120289289 | BASE STATION AND BROADCAST CHANNEL TRANSMISSION METHOD - A disclosed base station transmits a broadcast channel to a user device a predefined number of times in a predetermined cycle for communication with the user device. The base station includes a repetition unit configured to repeat the broadcast channel, after the broadcast channel is channel-coded, for the predefined number of times to generate multiple broadcast channels; and a signal waveform changing unit configured to process the generated broadcast channels such that the processed broadcast channels have different signal waveforms. Positions of the broadcast channels in the order of transmission in the predetermined cycle are associated with the signal waveforms of the broadcast channels. | 11-15-2012 |
20120300652 | 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 transmitting and receiving downlink channel quality measurement reference signals in consideration of interference estimation of high accuracy, in a wireless communication method of the invention, a radio base station apparatus generates channel quality measurement reference signals, and maps the channel quality measurement reference signals to two adjacent symbols, and a mobile terminal device receives a downlink signal including the channel quality measurement reference signals mapped to two adjacent symbols, and performs interfering power estimation using the channel quality measurement reference signals mapped to two adjacent symbols. | 11-29-2012 |
20130142101 | TRANSMITTER, RECEIVER, MOBILE COMMUNICATION SYSTEM AND SYNCHRONIZATION CHANNEL - A transmitter includes an amplitude adjustment unit multiplying an amplitude adjustment sequence value for adjusting amplitude with a synchronization channel transmitted from a base station for establishing synchronization with a mobile station. | 06-06-2013 |
20130176931 | TRANSMISSION DEVICE AND TRANSMISSION METHOD - A disclosed OFDM-based transmission device includes a unicast channel generating unit configured to generate a unicast channel; an MBMS channel generating unit configured to generate an MBMS channel; a multiplexing unit configured to time-division-multiplex the unicast channel and the MBMS channel in the same frequency band; and a transmitting unit configured to transmit time-division-multiplexed transmission symbols. In the disclosed transmission device, the guard interval length for the MBMS channel is set longer than the guard interval length for the unicast channel. | 07-11-2013 |
20130188584 | USER APPARATUS, BASE STATION APPARATUS, AND METHOD IN MOBILE COMMUNICATION SYSTEM - A user apparatus transmits an uplink control signal to a base station apparatus using a single carrier scheme. The user apparatus includes: a unit configured to prepare acknowledgement information indicating positive acknowledgement or negative acknowledgement for a downlink data signal based on a result of demodulation of the downlink data signal; a unit configured to prepare channel state information indicating reception quality of a downlink reference signal; a unit configured to channel-code multiplexed control information in which the acknowledgement information and the channel state information are multiplexed to prepare the uplink control signal; and a unit configured to transmit the uplink control signal using dedicated resources different from resources for an uplink data signal. | 07-25-2013 |
20130223260 | BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - The object is achieved by providing a base station apparatus for performing time and frequency scheduling in uplink packet access with: an interference amount measurement part configured to measure an uplink interference amount for each interference amount measurement unit which comprises a predetermined period and a predetermined number of frequency blocks; an interference amount determination part configured to determine whether the uplink interference amount satisfies a predetermined condition; and an overload indicator reporting part configured to report an overload indicator to a neighboring cell when the predetermined condition is satisfied. | 08-29-2013 |
20140016599 | BASE STATION APPARATUS AND METHOD FOR IMPROVING CHANNEL ESTIMATION ACCURACY IN UPLINK - A base station apparatus includes a communication unit configured to communicate with base stations of a plurality of adjacent cells; a management unit configured to manage frequency bands for use in the adjacent cells; and a determination unit configured to determine instruction contents according to status of use of the frequency bands. The instruction contents are reported to all or a part of the adjacent cells via the communication unit. The instruction contents specify: a type of a pilot channel transmitted by a user residing in an adjacent cell; whether pilot channels of each user are code-division multiplexed or not; and whether pilot channels of each user are frequency-division multiplexed or not, and the like. | 01-16-2014 |