Patent application number | Description | Published |
20110319113 | BASE STATION APPARATUS AND INFORMATION TRANSMITTING METHOD - Provided are a base station apparatus and an information transmitting method capable of enhancing frequency diversity effect and improving reception quality characteristics at a mobile terminal apparatus even when a system bandwidth is extended. The information transmitting method comprises: using reception quality information from the mobile terminal apparatus as a basis to select one or more than one group band from a set of group bands obtained by dividing a system band (ST | 12-29-2011 |
20120033625 | BASE STATION APPARATUS AND INFORMATION TRANSMISSION METHOD - To improve the frequency diversity effect and enhance reception quality characteristics in a mobile terminal apparatus even when the system bandwidth is extended, provided are a base station apparatus which assigns transmission data to each user to a single or plurality of group bands among group bands configured by dividing a system band into a plurality of bands, and transmits the transmission data assigned to the group bands on downlink, and a mobile terminal apparatus which receives the transmission data assigned to the group bands. | 02-09-2012 |
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 |
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 |
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 |
20130058286 | BASE STATION APPARATUS AND USER TERMINAL - A base station apparatus having a control information generation section that generates, per fundamental frequency block, a downlink control information piece for demodulating a data channel that is transmitted for each of a plurality of fundamental frequency blocks assigned to a user terminal, a determining section that determines, per fundamental frequency block, a search space which is a candidate area where the downlink control information piece is arranged, and a transmission section that transmits a downlink control channel in which the search space containing the downlink control information piece is arranged is disclosed. The control information generation section arranges respective downlink control information pieces corresponding to the fundamental frequency blocks in a downlink control channel of a specific fundamental frequency block among the fundamental frequency blocks, and the determining section distributes positions of search spaces such that the search spaces are separate between fundamental frequency blocks and between user terminals. | 03-07-2013 |
20130058294 | BASE STATION APPARATUS AND USER TERMINAL - The present invention provides a search space configuration that is suitable for a communication system in which a plurality of fundamental frequency blocks are grouped together into a wide band. A base station apparatus ( | 03-07-2013 |
20130064200 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - To provide a base station apparatus, a mobile terminal apparatus and a communication control method supporting respectively a plurality of mobile communication systems coexist mutually. The base station apparatus in a radio communications system in which an LTE-A system and an LTE system are placed so as to coexist with each other, the LTE-A system having a system band composed of a plurality of component carriers, the LTE system having a system band composed of a single component carrier, the base station apparatus is configured to generate ACK/NACK of HARQ to uplink transmission of a plurality of the component carriers, set offset as 0 to the component carrier used in the LTE system, set the offset to be increased beginning at the aforementioned component carrier in order of being circuited among the plurality of the component carriers, and add the aforementioned offset to the allocation resource of ACK/NACK. | 03-14-2013 |
20130070703 | RADIO COMMUNICATION CONTROL APPARATUS AND RADIO COMMUNICATION CONTROL METHOD - The present invention aims to realize an uplink assignment information structure that is optimal for signaling of uplink assignment information when a plurality of frequency bands are assigned to an uplink data channel. In a radio communication system where a plurality of frequency bands are assigned to one user on the uplink, uplink assignment information including uplink resource allocation information in which resources are allocated in a bitmap format is defined, this uplink assignment information is formed in the same bit size as downlink assignment information (for example, DCI format | 03-21-2013 |
20130094449 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a base station apparatus, a mobile terminal apparatus and a communication control method that can adequately allocate resources of response signals for retransmission for spatially-multiplexed signals respectively corresponding to a plurality of layers via the uplink and that support next-generation mobile communication systems. Discloses is a configuration to receive signals in which a plurality of layers are spatially-multiplexed on the uplink from a mobile terminal apparatus ( | 04-18-2013 |
20130107836 | BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD | 05-02-2013 |
20130107855 | RADIO COMMUNICATION SYSTEM | 05-02-2013 |
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 |
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 |
20130182673 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - Provided are a base station apparatus, a mobile terminal apparatus and a communication control method capable of preventing the increase in amount of signaling for uplink scheduling when allocation resource blocks are allocated in a discontiguous manner. The base station apparatus ( | 07-18-2013 |
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 |
20130288738 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND TRANSMISSION POWER CONTROL METHOD - In order to make transmission power control of a PDCCH signal in an appropriate manner in a communication system having a system band formed with a plurality of fundamental frequency blocks, the present invention provides a radio base station apparatus having: a transmitting section configured to transmit downlink control channel signals for respective fundamental frequency blocks to a mobile terminal apparatus; and a receiving section configured to receive retransmission response signals that are transmitted in a predetermined fundamental frequency block from the mobile terminal apparatus. In the transmitting section, a transmission power control section ( | 10-31-2013 |
20130308540 | COMMUNICATION CONTROL METHOD, MOBILE COMMUNICATION SYSTEM AND MOBILE TERMINAL APPARATUS - The present invention is designated to reduce the deterioration of transmission characteristics upon data transmission, even when soft buffer memory for retransmission control is not sufficiently secured in a mobile terminal apparatus. The present invention provides the steps of, in a base station apparatus (eNB), performing channel coding of information bits (ST | 11-21-2013 |
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 |
20130322392 | MICRO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to reduce interference from a macro base station to a small transmission power node. The present invention is characterized in providing a micro base station which forms, in a macro cell where a macro base station transmits a signal to a macro terminal, a micro cell where the micro base station transmits a signal to a micro terminal under control with low power, and this micro base station generates a PDCCH which includes downlink or uplink resource allocation information, and, in a non-transmission period in which the macro base station stops transmitting signals while leaving minimal quality measurement signals, shifts the transmission starting symbol of the PDCCH to a position where the PDCCH does not overlap the quality measurement signals. | 12-05-2013 |
20130336273 | APERIODIC CHANNEL STATE INFORMATION REPORTING METHOD, RADIO BASE STATION APPARATUS AND USER TERMINAL - The present invention is designed such that, when a user terminal performs radio communication using a plurality of serving cells of different component carriers, it is possible to flexibly report aperiodic channel state information of a serving cell required on the network side among the plurality of serving cells. A radio base station apparatus transmits an uplink scheduling grant, which includes an identification field that identifies an uplink serving cell where an uplink shared channel is allocated among a plurality of uplink serving cells and a request field that requests reporting of aperiodic channel state information from a user terminal, to the user terminal, via a downlink control channel, and the user terminal reports aperiodic channel state information of a downlink serving cell that is designated by a combination of the identification field and the request field, to the radio base station apparatus, via the uplink shared channel. | 12-19-2013 |
20130343313 | RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - In order to prevent any increase in number of blind detections and make efficient use of radio resources even when a format of downlink control information is changed in accordance with a communication environment, the present invention provides a radio communication method for generating control information by using a predetermined DCI format out of a plurality of DCI formats including a first DCI format having an uplink scheduling grant and a second DCI format having downlink scheduling assignment. When the first DCI format is extended in size, the second DCI format is added with an information field so as to have the same size as the extended first DCI format, and information to extend an existing function of the second DCI format and/or information to add a new function is added to the information field thereby to generate the control information. | 12-26-2013 |
20140023009 | APERIODIC CHANNEL STATE INFORMATION REPORTING METHOD, RADIO BASE STATION APPARATUS AND USER TERMINAL - In order to report aperiodic channel state information (A-CSI) flexibly even when a user terminal performs radio communication using a plurality of component carriers (CCs) in an HetNet environment, the present invention provides an aperiodic channel sate information reporting method comprising: a step of transmitting in advance, from a pico base station (PeNB) to pico UE, channel state measurement target information having information about presence or absence of reporting of channel state information and a subframe as a measurement target associated with trigger bit information indicating information about presence or absence of reporting of channel state information and a component carrier as a measurement target (step ST | 01-23-2014 |
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 |
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 |
20140192758 | COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION METHOD - The present invention is designed to use frequency resources effectively, even in the situation where a plurality of mobile terminal apparatuses of varying capabilities coexist. A communication system, in which a mobile terminal apparatus ( | 07-10-2014 |
20140235256 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, MACHINE COMMUNICATION TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to make it possible to reduce the cost required for a machine communication terminal when the network domain of the machine communication system employs an LTE system. With the radio communication method of the present invention, a radio base station apparatus allocates downlink signals to a machine communication terminal in a predetermined cycle and transmits the allocated downlink signals to the machine communication terminal, and the machine communication terminal receives downlink signals from the radio base station apparatus in the predetermined cycle and demodulates the downlink signals received in the predetermined cycle. | 08-21-2014 |
20140241223 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL, AND RADIO COMMUNICATION METHOD - According to the present invention, even when the ratio between uplink subframes and downlink subframes is changed in each component carrier in TDD carrier aggregation, it is still possible to prevent a decrease in capacity. With the radio communication method according to the present invention, a radio base station apparatus generates a downlink control channel signal containing downlink control information including carrier indicator field information, and transmits the downlink control channel signal to a user terminal, and the user terminal receives the downlink control channel signal, and executes signal processing with respect to the downlink signal in accordance with the downlink control information. In this case, the carrier indicator field information is information which associates a carrier index and the index of a secondary cell subframe to be scheduled. | 08-28-2014 |
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 |
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 |
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 |
20140348038 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to prevent the decrease of capacity even when the ratio of uplink subframes and downlink subframes is changed in each component carrier in TDD carrier aggregation. With the radio communication method according to the present invention, a radio base station apparatus generates a downlink control channel signal containing downlink control information including carrier indicator field information, and transmits the downlink control channel signal to a user terminal, and the user terminal receives the downlink control channel signal and executes signal processing with respect to the downlink signal in accordance with the downlink control information. In this case, the carrier indicator field information is information which associates a carrier index and the number of subframes to schedule victim subframes. | 11-27-2014 |
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 |
20150016370 | RADIO BASE STATION APPARATUS, USER TERMINAL, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to allocate radio resources for an extended control channel adequately in a configuration in which a downlink control channel is extended. A radio base station apparatus according to the present invention has a mapping section configured to separate and map, per predetermined frequency domain unit constituting a system band, a common search space, which is a candidate region to arrange common control information that is common between user terminals in, and a UE-specific search space, which is a candidate region to arrange specific control information that is specific to each user terminal in, and a transmission section configured to frequency-division-multiplex with a downlink shared data channel and transmit an extended downlink control channel, in which the common control information is arranged in the common search space and in which the specific control information is arranged in the UE-specific search space, and the mapping section maps the common search space to a plurality of frequency domain units such that the common search space is distributed in the system band. | 01-15-2015 |
20150023268 | MOBILE COMMUNICATION METHOD, RADIO BASE STATION, AND MOBILE STATION - An objective is to improve communication quality by reducing an insertion loss or the like of a diplexer inserted to reduce a leakage from an uplink band to a downlink band in different bands. A mobile communication method according to the present invention includes the steps of: transmitting simultaneous transmission capability information from a mobile station UE to a radio base station eNB, the simultaneous transmission capability information indicating whether or not the mobile station UE can transmit uplink data signals via multiple carriers in the same sub-frame while performing uplink CA; performing scheduling for the mobile station UE by the radio base station eNB on the basis of the simultaneous transmission capability information; and performing communication by the mobile station UE on the basis of the scheduling information. | 01-22-2015 |
20150029883 | MOBILE COMMUNICATION METHOD, RADIO BASE STATION AND MOBILE STATION - In current LTE, different measurement cycles of a measurement process are set for respective measurement frequencies. A mobile communication method according to the present invention includes: a step A of a radio base station eNB notifying a mobile station UE of a measurement cycle for “Inter-Frequency Measurement” for each measurement frequency; and a step B of the mobile station UE performing out a measurement process in each of cells # | 01-29-2015 |
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 |
20150036651 | RADIO COMMUNICATION TERMINAL, BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to provide a radio communication terminal, a base station apparatus, a radio communication system and a radio communication method which can reduce the cost to be required for an MTC terminal when the LTE system is employed in the network domain of a machine communication system. A radio communication terminal according to the present invention is a radio communication terminal that performs machine communication via a base station apparatus of a radio communication system that is operated such that a frequency becomes the first band at a maximum, depending on the performance which a communication device supports, and has a receiving section that has receiving performance to be able to support the first band, and that decodes the entire band of the first band at least with respect to a time domain where a downlink control channel is allocated, and a transmission section that has transmission performance to be able to support a second band having a narrower bandwidth than the first band, and that allocates an uplink control channel and an uplink data channel to the second band. | 02-05-2015 |
20150043372 | RADIO COMMUNICATION METHOD, RADIO BASE STATION, USER TERMINAL, AND RADIO COMMUNICATION SYSTEM - The present invention is designed to enable adequate channel quality measurement in a user terminal even when CSI-RS transmission parameters are reported from a plurality of transmission points to the user terminal. In a radio communication method for a plurality of radio base stations and a user terminal having ability to receive a reference signal for channel state measurement from the plurality of radio base stations, the radio base station generates report information, which is formed with information that represents a transmission parameter of the reference signal, and system information that includes at least a system bandwidth of a radio base station that transmits the reference signal, and reports the generated report information to the user terminal by means of higher layer signaling, and the user terminal measures channel quality based on the received report information. | 02-12-2015 |
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 |