Patent application number | Description | Published |
20080214222 | MOBILE STATION CAPABLE OF AND A METHOD FOR GENERATING CHIP PATTERNS FOR TRANSMISSION - A base station configured to communicate with a mobile station includes a controlling-information transmitting unit and a receiving unit. The controlling-information transmitting unit is configured to transmit to the mobile station as a set of controlling information, an information set indicating an environment of a cell which is resided by the mobile station, or an information set indicating power of interference from surrounding cells, or an information set indicating a condition of propagation channel. The receiving unit is configured to receive a signal transmitted from the mobile station, based on said set of controlling information, via a variably-controlling process of a spreading factor and a number of chip repetitions. | 09-04-2008 |
20080225820 | MOBILE STATION CAPABLE OF AND A METHOD FOR GENERATING CHIP PATTERNS FOR TRANSMISSION - A mobile station for wirelessly transmitting to a base station by DS-CDMA a signal which is spread by multiplying a spreading code includes a high-precision transmission timing control unit configured to control transmitting timings of transmitting signals so that a time difference at the base station among timings of receiving from a plurality of mobile stations approaches zero. | 09-18-2008 |
20080253432 | NOISE POWER ESTIMATION APPARATUS, NOISE POWER ESTIMATION METHOD AND SIGNAL DETECTION APPARATUS - A noise power estimation apparatus is disclosed. The noise power estimation apparatus includes: a part for calculating correlation between a received signal and a pilot signal so as to obtain a received power of the pilot signal for each path; a part for removing a multipath interference component from the received power of the pilot signal by using a predetermined power ratio between the pilot signal and a data signal so as to obtain a corrected received power of the pilot signal; a part for estimating an estimated total power of the pilot signal and the data signal included in the received signal based on the corrected received power and the predetermined power ratio; and a part for subtracting the estimated total power from a total power of the received signal so as to obtain a noise power. | 10-16-2008 |
20090143075 | MOBILE STATION, BASE STATION, COMMUNICATIONS SYSTEM, AND COMMUNICATION METHOD - A mobile station comprises a reception unit configured to receive a signal transmitted from a base station; a selection unit configured to select a communication area to perform communication from a plurality of communication areas based on traffic load in the plurality of communication areas where the reception unit can receive the signal; and a notification unit configured to notify the base station of the communication area selected. Another mobile station comprises a reception unit configured to receive a signal transmitted from a base station; a calculation unit configured to calculate a ratio of an average reception quality value over a short period to an average reception quality value over a long period; and a selection unit configured to select a communication area to perform communication from a plurality of communication areas where the reception unit can receive the signal, based on the ratio. | 06-04-2009 |
20090161733 | RADIO COMMUNICATION SYSTEM, TRANSMITTER, RECEIVER AND RADIO COMMUNICATING METHOD - A radio communication system having a radio transmitter and a radio receiver and adopting multiple carrier modulation and code spreading modulation methods is disclosed. The radio communication system comprises a selecting unit provided in the radio transmitter or the radio receiver, for selecting an interleaving mode out of plural interleaving modes depending on radio propagation path conditions; a symbol configuration unit provided in the radio transmitter; and a symbol reconfiguration unit provided in the radio receiver. The symbol configuration unit configures information symbols to be transmitted by the radio transmitter in both time and frequency directions in a pattern according to the interleaving mode selected by the selecting unit, and the symbol reconfiguration unit reconfigures information symbols received by the radio receiver in both time and frequency directions in an inverse pattern of the pattern. | 06-25-2009 |
20100080207 | CHANNEL STRUCTURING METHOD AND BASE STATION THEREWITH - The present invention is directed to a channel structuring method that includes a step of providing time frames segmented at a predetermined interval in communication channels of n subcarriers, a step of selecting a predetermined number of subcarriers from n subcarriers and a step of inserting a common control channel signal and a common pilot signal periodically into each of the time frames of the selected subcarriers. | 04-01-2010 |
20100309808 | MOBILE COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER EQUIPMENT, AND METHOD - A base station apparatus is used in a mobile communication system in which at least a shared data channel is transmitted by an orthogonal modulation scheme using an I-channel and a Q-channel. The base station apparatus includes a providing unit providing Acknowledgement/Non-Acknowledgement information indicating whether retransmission of a signal received in uplink is required; a mapping unit mapping a number of multiplexed users of the Acknowledgement/Non-Acknowledgement information to the I-channel or the Q-channel based on a predetermined mapping table; and a reporting unit reporting the Acknowledgement/Non-Acknowledgement information to the respective users. The mapping table indicates that, when the number of the multiplexed users is equal to or less than a predetermined number, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel or the Q-channel, and otherwise, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel and the Q-channel. | 12-09-2010 |
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 |
20110002235 | BASE STATION, MOBILE STATION, MOBILE COMMUNICATION SYSTEM, AND METHOD OF CONTROLLING CONTROL SIGNAL TRANSMISSION - A disclosed base station includes a transmission-rate determining unit for determining a transmission rate of a control channel for transmitting an upper-layer control signal, and a transmitter for allocating a predetermined bandwidth to the control channel for transmitting the upper-layer control signal according to the determined transmission rate, and transmitting the signal. | 01-06-2011 |
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 |
20110064044 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, MOBILE COMMUNICATIONS SYSTEM AND TRANSMISSION CONTROL METHOD - A disclosed transmission apparatus comprises a switching portion that switches radio access methods; a frequency domain signal generation portion that allocates a radio resource to a spread chip sequence on which one of a fast Fourier transformation and a series/parallel conversion is performed in accordance with the switched radio accessed method, so as to generate a signal in a frequency domain; and a transmission signal generation portion that performs a fast inverse Fourier transformation on the signal in the frequency domain so as to generate a transmission signal. | 03-17-2011 |
20110085514 | BASE STATION, MOBILE STATION, AND COMMUNICATIONS METHOD - A base station carrying out communications with a mobile station with an Orthogonal Frequency Division Multiplexing (OFDM) method by using a predetermined frequency band out of a transmission band is disclosed. The base station includes an allocation portion that allocates, for a mobile station performing peripheral cell search, a band that includes a center frequency on a raster of a first band and has a bandwidth equal to or greater than a bandwidth of a second band with which a synchronization channel is transmitted. | 04-14-2011 |
20110149896 | BASE STATION AND MOBILE STATION - One aspect of the present invention relates to a base station wherein either resource blocks resulting from division of a system bandwidth into blocks of consecutive frequency subcarriers or distributed type resource blocks consisting of frequency subcarriers discretely distributed within the system bandwidth and resulting from segmentation of the resource blocks into multiple resource blocks are assigned to mobile stations, the base station including: a scheduling unit configured to assign either the resource blocks or the distributed type resource blocks to the mobile stations at a predefined assignment cycle based on respective downlink reception channel states transmitted from the mobile stations. | 06-23-2011 |
20110207493 | USER APPARATUS, BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - A user apparatus to which radio access schemes that are a single-carrier scheme and a multicarrier scheme are applied, includes: a radio access scheme setting unit configured to set a radio access scheme; a discrete Fourier transform unit configured to perform discrete Fourier transform on a modulated symbol sequence when the set radio access scheme is the single-carrier scheme; a serial parallel conversion unit configured to perform serial parallel conversion on a modulated symbol sequence when the set radio access scheme is the multicarrier scheme; a frequency domain signal generation unit configured to assign a radio resource to the modulated symbol sequence on which discrete Fourier transform has been performed or to the modulated symbol sequence on which serial parallel conversion has been performed to generate a frequency domain signal; a transmission signal generation unit configured to perform inverse fast Fourier transform on the frequency domain signal to generate a transmission signal; a transmission power control unit configured to perform transmission power control according to the set radio access scheme; and an RF unit configured to convert the transmission signal to a radio frequency, and to transmit the transmission signal by performing the transmission power control. | 08-25-2011 |
20110211544 | TRANSMISSION APPARATUS, TRANSMISSION METHOD, RECEPTION APPARATUS AND RECEPTION METHOD - A transmission apparatus which attempts improvement of signal quality in an uplink and a downlink carries out radio transmission of different signals simultaneously from respective ones of a plurality of antennas. The apparatus has pilot multiplexing means for multiplexing a pilot channel to transmit from each antenna in one or more of a time division multiplexing method, a frequency division multiplexing method and a code division multiplexing method, data multiplexing means for time-multiplexing a pilot channel and a data channel, and means for transmitting a signal in a least one of a space division multiplexing (SDM) method and a space time transmission diversity (STTD) method. | 09-01-2011 |
20110216725 | TRANSMISSION APPARATUS AND COMMUNICATION METHOD - A transmission apparatus which multiplexes control channels for multiple reception apparatuses into an OFDM symbol at the same timing in OFDM downlink radio access includes a pattern generating unit configured to generate a frequency mapping pattern which is specific to the transmission apparatus; and a frequency allocating unit configured to allocate subcarriers to the control channels for the multiple reception apparatuses according to the frequency mapping pattern. | 09-08-2011 |
20110216729 | 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 receive a downlink control signal and a downlink data signal; a unit configured to prepare acknowledgement information indicating positive acknowledgement or negative acknowledgement for the downlink data signal; a unit configured to prepare the uplink control signal including the acknowledgement information; a unit configured to transmit the uplink control signal using different resources which are different from resources that can be used for an uplink data signal; and a storage unit configured to store predetermined correspondence relationship which uniquely associates resources of the downlink control signal or the downlink data signal with resources used for the uplink control signal. | 09-08-2011 |
20110216844 | BASE STATION, MOBILE STATION AND METHOD - A base station performs communication of an orthogonal frequency division multiplexing (OFDM) scheme with a mobile station by using any one of equal to or greater than two frequency bands. The base station includes means that transmits a synchronization channel and a control channel using a band that includes a center frequency f | 09-08-2011 |
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 |
20110256898 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND PAGING INFORMATION RECEPTION METHOD - A disclosed transmitting apparatus includes a paging indicator information generating unit generating paging indicator information including a group ID of users who are to receive a paging channel and information indicating a radio resource in which the paging channel is transmitted; and a multiplexing unit multiplexing the paging indicator information. | 10-20-2011 |
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 |
20120014348 | CHANNEL ASSIGNMENT METHOD, RADIO COMMUNICATION SYSTEM AND CHANNEL STRUCTURE IN RADIO SECTION - In a radio communication system, a user terminal transmits a reservation packet to a base station using a common control channel ( | 01-19-2012 |
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 |
20120076227 | RADIO BASE STATION APPARATUS AND METHOD FOR SELECTING MODULATION AND CODING SCHEME - Provided is a radio base station apparatus capable of selecting an optimal modulation and coding scheme for each transmission stream easily. The radio base station apparatus has a CQI information decoder ( | 03-29-2012 |
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 |
20120093257 | APPARATUS FOR GENERATING A SET OF RADIO PARAMETERS, A TRANSMITTER AND A RECEIVER - A transmitter includes: a data modulation and channel coding unit configured to perform data modulation and channel coding for a data channel with a modulation level and a channel coding rate updated for each transmission time interval; a multiplexing unit configured to multiplex a control channel and the data channel for each transmission time interval; and an adjusting means configured to adjust a length of the transmission time interval. Increasing a unit of information transmission in the time direction and/or the frequency direction depending on communication conditions can reduce a frequency of inserting (allocating) the control channel, and can improve data transmission efficiency. | 04-19-2012 |
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 |
20120257592 | USER APPARATUS, BASE STATION APPARATUS AND METHOD IN MOBILE COMMUNICATIONS SYSTEM - A base station apparatus in a mobile communications system has a unit which transmits, to one or more user apparatuses, a downlink control signal including information for allocating a radio resource, a unit which receives an uplink signal from the one or more user apparatuses, and a unit which determines, based on a feedback from the user apparatus, a pre-encoding matrix indicator (PMI) indicating a pre-encoding matrix to be applied to multiple antennas of the base station apparatus. When a number of multiplexed users in the downlink control signal is no less than a predetermined number, the PMI indicating the pre-encoding matrix to be applied to a whole system bandwidth of the mobile communications system is reported to each of the user apparatuses. | 10-11-2012 |
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 |
20120327839 | RADIO COMMUNICATION APPARATUS AND A METHOD OF TRANSMITTING A RETRANSMISSION PACKET - A radio communication apparatus includes a scheduling unit configured to determine a resource block based on an allocation pattern of resource blocks, where frames in which multiple resource blocks are arranged in a frequency direction are repeatedly formed in a time direction, the allocation pattern using a frame number as a variable. The radio communication apparatus also includes a transmitting unit configured to transmit a packet according to the resource block determined by the scheduling unit. | 12-27-2012 |
20130012256 | BASE STATION, MOBILE STATION, AND POWER CONTROL METHOD - A base station includes: means that derives a transmission power of a mobile station based on receive quality of an uplink pilot channel; means that reports the derived transmission power to the mobile station; and means that receives a control channel transmitted by the mobile station according to the reported information. Accordingly, irrespective of transmission power history over a past continuous time, the mobile station receives an instruction on the transmission power from the base station each time when transmitting a packet so as to be able to adjust the transmission power. | 01-10-2013 |
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 |
20130163545 | BASE STATION APPARATUS, USER EQUIPMENT, AND COMMUNICATION CONTROL METHOD IN MOBILE COMMUNICATION SYSTEM - A disclosed base station apparatus is capable of communicating with a user equipment terminal in a multi-input multi-output (MIMO) mobile communication system using Pre-coding. The base station apparatus includes a receiving unit receiving a Pre-coding Matrix Indicator (PMI) indicating a specific Pre-coding matrix, a determination unit determining a value of a flag indicator indicating whether the Pre-coding matrix specified in the PMI is to be used for downlink communications, a control signal generation unit generating a downlink control signal including at least the flag indicator, and a transmission unit transmitting a signal including the downlink control signal in downlink. | 06-27-2013 |
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 |
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 |
20130223415 | BASE STATION APPARATUS, USER APPARATUS AND COMMUNICATION CONTROL METHOD - A base station apparatus in a radio communication system where transmit diversity is applied in uplinks includes a reference signal measurement unit configured to measure a receive level of the reference signal, a switch pitch determination unit configured to determine the antenna switch pitch of transmitting the reference signal based on the receive level measured by the reference signal measurement unit, and a transmitting unit configured to transmit the antenna switch pitch determined by the switch pitch determination unit. | 08-29-2013 |
20130301576 | BASE STATION AND TRANSMISSION METHOD - A communication terminal in a multi-carrier system using a frequency bandwidth including a plurality of resource blocks, each of the resource blocks including one or more sub-carriers. The communication terminal includes a receiving unit configured to receive a signal in which a control channel is multiplexed into a single radio frame based on a number of control channels allocated into the single radio frame to use a lower coding rate by repeating transmitting without changing encoding method in which a channel other than the control channel is multiplexed in accordance with scheduling information for allocating one or more of the plurality of resource blocks to the communication terminal and a processing unit configured to perform a process on the signal received by the receiving unit. | 11-14-2013 |
20130329655 | RADIO COMMUNICATION APPARATUS AND METHOD - In a radio communication system, a downlink frequency band includes a plurality of frequency blocks including one or more carrier frequencies, and one or more frequency blocks are used for data transmission to a single user. A radio communication apparatus for use in the communication system has an evaluation unit evaluating the quality of a received signal for each frequency block and storing plurality of stored quality evaluations of the received signal, a comparison unit comparing the plural quality evaluations of the received signal, and a transmission unit transmitting a predetermined number of the quality evaluations of the received signal over an uplink control channel. | 12-12-2013 |
20140003398 | USER APPARATUS, BASE STATION APPARATUS, AND METHOD | 01-02-2014 |
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 |
20140056264 | TRANSMISSION AND RECEPTION BANDWIDTH SETTING METHOD, MOBILE TERMINAL AND BASE STATION IN RADIO COMMUNICATION SYSTEM THAT DEFINES A PLURALITY OF SIGNAL BANDWIDTHS - In a radio communication system defining a plurality of bandwidths, mobile terminals of kinds respectively corresponding to the plurality of bandwidths are accommodated in the system, and a minimum transmission bandwidth of the plurality of bandwidths is set as a transmission bandwidth of a downlink common channel. Or, every mobile terminal accommodated in the radio communication system is provided with a capability for processing a bandwidth equal to or greater than a predetermined value, and equal to or more than two transmission bandwidths that are equal to or less than a predetermined value are set as a transmission bandwidth of a downlink common channel. In the latter case, the mobile terminal identifies a bandwidth of a received downlink common channel. | 02-27-2014 |
20140086170 | MOBILE COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER EQUIPMENT, AND METHOD - A base station apparatus is used in a mobile communication system in which at least a shared data channel is transmitted by an orthogonal modulation scheme using an I-channel and a Q-channel. The base station apparatus includes a providing unit providing Acknowledgement/Non-Acknowledgement information indicating whether retransmission of a signal received in uplink is required; a mapping unit mapping a number of multiplexed users of the Acknowledgement/Non-Acknowledgement information to the I-channel or the Q-channel based on a predetermined mapping table; and a reporting unit reporting the Acknowledgement/Non-Acknowledgement information to the respective users. The mapping table indicates that, when the number of the multiplexed users is equal to or less than a predetermined number, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel or the Q-channel, and otherwise, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel and the Q-channel. | 03-27-2014 |