Patent application number | Description | Published |
20090116449 | CHANNEL TRANSMISSION METHOD AND BASE STATION - A channel transmission method of a base station used in a communication system employing orthogonal frequency division multiplexing (OFDM) is disclosed. The channel transmission method includes the steps of selecting sectors where soft-combining is to be performed based on location information of a mobile station and/or the type of a channel to be transmitted; generating transmission signals each including a pilot signal for demodulation and data of the channel to be soft-combined and transmitting the generated transmission signals to the respective selected sectors; and causing the mobile station to receive and combine the transmission signals arriving from the selected sectors within a guard interval. | 05-07-2009 |
20090129362 | TRANSMISSION DEVICE AND TRANSMISSION METHOD - A disclosed transmission device includes a frequency scheduling unit configured to allocate, to each user, either frequency blocks that are consecutive frequency subcarrier blocks obtained by dividing a system bandwidth or distributed frequency blocks that are frequency subcarrier blocks discretely distributed in the system bandwidth; and a mapping unit configured to assign transmission data to the frequency blocks or the distributed frequency blocks according to the allocation result. The frequency scheduling unit is configured to allocate the distributed frequency blocks using the frequency blocks as units and to allocate sub-blocks obtained by dividing the respective distributed frequency blocks. | 05-21-2009 |
20090135791 | BASE STATION AND COMMUNICATION SYSTEM - A base station includes: a first reception timing detecting unit configured to detect a reception timing of a packet received from a first mobile station of multiple mobile stations which is situated in a first sector; a second reception timing detecting unit configured to detect a reception timing of a packet received from a second mobile station of the multiple mobile stations which is situated in a second sector; a transmission timing determining unit configured to determine transmission timings of signals transmitted from the first mobile station and the second mobile station based on the reception timings detected by the first reception timing detecting unit and the second reception timing detecting unit; a control information generating unit configured to generate transmission timing control information for the first mobile station and the second mobile station based on the transmission timings; and a radio resource allocating unit configured to allocate orthogonal radio resources to the first mobile station and the second mobile station. | 05-28-2009 |
20090168748 | MOBILE STATION, BASE STATION, INTER-USER UPLINK SYNCHRONIZATION METHOD - A base station determines transmission intervals at which a mobile station transmits a channel to be used to maintain synchronization and a radio resource that is to transmit the channel to be used to maintain synchronization, in accordance with information indicating a state of the mobile station transmitted from the mobile station in order to maintain synchronization with a plurality of the mobile stations connecting to the base station; the mobile station generates the channel to be used to maintain synchronization; the mobile station carries out transmission control of the channel to be used to maintain synchronization in accordance with the transmission intervals and the radio resource; the base station carries out a correlation detection in accordance with the channel to be used to maintain synchronization that is transmitted from the mobile station in accordance with the transmission intervals and the radio resource, and feeds back delay information to the corresponding mobile stations; and the mobile station maintains synchronization in accordance with the delay information transmitted from the base station. | 07-02-2009 |
20090185541 | BASE STATION - A base station communicating with mobile stations by using a frequency band within a transmission band based on orthogonal frequency division multiplexing is disclosed. The base station includes a multiplexing unit configured to multiplex a synchronization channel, for a mobile station performing an initial cell search, in a second frequency band including a center frequency on a raster of a first frequency band and having a bandwidth corresponding to the smallest one of receivable bandwidths of the mobile stations in a system. The multiplexing unit is configured to multiplex multiple synchronization channels, for a mobile station performing a neighboring cell search, in a third frequency band including the center frequency on the raster of the first frequency band and having a bandwidth that is greater than that of the second frequency band. | 07-23-2009 |
20090185577 | 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. | 07-23-2009 |
20090196165 | 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. | 08-06-2009 |
20090196249 | BASE STATION, USER DEVICE, AND METHOD USED IN MOBILE COMMUNICATION SYSTEM - A base station used in a mobile communication system employing a single carrier scheme for uplink transmission is disclosed. The base station includes a scheduler configured to allocate one or more uplink resource blocks to a user device according to uplink channel conditions of the user device; and a reporting unit configured to report scheduling information indicating the allocation result to the user device. An uplink control channel of the user device is mapped to a resource block in a transmission frame including multiple resource blocks according to a hopping pattern based on the scheduling information; and the uplink control channel is mapped to a resource block according to the same hopping pattern regardless of whether the uplink control channel is associated with a user data channel. | 08-06-2009 |
20090207803 | BASE STATION AND METHOD IN MOBILE COMMUNICATIONS SYSTEM - A disclosed base station in a mobile communications system which uses a single-carrier technique for uplink includes a classifying unit which classifies, for each of multiple user apparatuses according to a path loss between the respective user apparatus and the base station, the multiple user apparatuses into two or more groups; and a scheduler which plans allocating of uplink resources to the user apparatuses. Uplink signals of each user apparatus that have multiple frequency components lined up in equal frequency intervals are multiplexed using a distributed frequency division multiplexing technique such that they are made mutually orthogonal on a frequency axis, the scheduler plans the resource allocating such that the user apparatuses belonging to different groups utilize different group bands or different time slots, and the group bands are specified by dividing a system band into groups. | 08-20-2009 |
20090219860 | BASE STATION AND COMMUNICATION METHOD - The present invention relates to a base station for generating and transmitting system information to a mobile station. The present invention also relates to a communication method of communicating system information in a communication system including the base station and the mobile station. The base station generates system information; categorizes the system information into multiple pieces of system information; multiplexes the categorized multiple pieces of system information into multiple channels or multiple blocks; and transmits the system information on the multiple channels or the multiple blocks. The mobile station receives system information included in a portion of the multiple channels or the multiple blocks. | 09-03-2009 |
20090219873 | TRANSMITTING DEVICE, RECEIVING DEVICE, AND RANDOM ACCESS CONTROL METHOD - A disclosed transmitting device includes a random access channel generating unit configured to generate a random access channel including a preamble that includes at least a part of control information; and a transmission control unit configured to allocate a continuous frequency band or a discontinuous comb-like frequency band set to a user and to transmit the random access channel in a system that flexibly supports multiple bandwidths. | 09-03-2009 |
20090220017 | 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. | 09-03-2009 |
20090232062 | 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. | 09-17-2009 |
20090238137 | BASE STATION AND METHOD OF GENERATING A SYNCHRONIZATION CHANNEL - A synchronization channel is generated by generating, as a P-SCH basic waveform, a signal sequence in which codes with constant amplitude in a frequency domain are placed at intervals of a predetermined number of subcarriers; transforming the signal sequence into a time domain; multiplying the signal sequence transformed into the time domain with a predetermined code sequence; retransforming the signal sequence multiplied with the predetermined code sequence into the frequency domain; generating an S-SCH signal sequence; and multiplexing the signal sequence retransformed into the frequency domain and the S-SCH signal sequence. | 09-24-2009 |
20090245190 | RADIO BASE STATION, USER DEVICE, AND METHOD USED IN MOBILE COMMUNICATION SYSTEM - A radio base station used in a mobile communication system is disclosed. The radio base station includes a scheduler configured to allocate one or more resource blocks, which are defined by a predetermined bandwidth and a predetermined transmission time interval, to a user device; and a reporting unit configured to report scheduling information indicating radio resource allocation to the user device. The scheduler is configured to generate the scheduling information such that downlink data channels and downlink control channels are transmitted using the transmission time interval as a transmission unit and uplink control channels are transmitted using an integral multiple of the transmission time interval as a transmission unit. | 10-01-2009 |
20090245229 | BASE STATION - A base station for transmitting a synchronization signal on a synchronization channel with a system bandwidth which is less than the maximum system bandwidth in a radio communication system supporting multiple system bandwidths includes a multiplexing unit configured to multiplex the synchronization channel and a channel other than the synchronization channel based on a characteristic of a reception filter used in a mobile station. The multiplexing unit may place the synchronization channel and the channel other than the synchronization channel on continuous subcarriers. Alternatively, the multiplexing unit may assign a guard band or a cyclic prefix to a transition band of the reception filter. | 10-01-2009 |
20090280841 | MOBILE STATION APPARATUS, BASE STATION APPARATUS, AND PAGING METHOD - A disclosed paging method includes a random access channel generating step of, when a group including an own station is being paged based on a paging indicator channel (PICH) transmitted from a base station apparatus, generating a random access channel (RACH) including information indicating a response to the paging indicator channel (PICH) by a mobile station apparatus; a transmitting step of transmitting the random access channel (RACH) by the mobile station apparatus; a random access channel detecting step of detecting the random access channel (RACH) as the response to the paging indicator channel (PICH) by the base station apparatus; a paging information generation determining step of determining whether paging information is to be generated based on a detection result of the random access channel (RACH); and a paging information generating step of generating paging information based on the determination result. | 11-12-2009 |
20090290570 | MOBILE STATION, BASE STATION, AND METHOD OF TRANSMITTING AN UPLINK SCHEDULING REQUEST - A base station determines both a transmission interval between scheduling requests which a mobile station transmits before transmitting uplink data and information about radio resources used for transmitting the scheduling requests, based on the status of the mobile station and/or QoS information transmitted from the mobile station. The mobile station generates the scheduling requests. The mobile station controls the transmission of the scheduling requests based on the transmission interval and the radio resources. The mobile station transmits the scheduling requests. The base station detects correlation based on the scheduling requests which are transmitted from the mobile station based on the transmission interval and the radio resources, and feeds delay information back to the mobile station. The mobile station maintains synchronization based on the delay information transmitted from the base station. | 11-26-2009 |
20090296563 | 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. | 12-03-2009 |
20090296925 | TRANSMISSION APPARATUS AND TRANSMISSION METHOD - A base station generates a unicast channel, a MBMS channel, and a pilot channel, that are multiplied by a scrambling code specific to a particular cell. The pilot channel is replicated as necessary. The unicast channel and the MBMS channel are time-multiplexed. For data in a unit transmission frame, a same frequency component is multiplied by a same scrambling code. | 12-03-2009 |
20090323642 | 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. | 12-31-2009 |
20090325579 | 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. | 12-31-2009 |
20100009718 | BASE STATION APPARATUS - A base station apparatus is disclosed. The base station includes multiple antennas; a first pre-encode processing unit which multiplies one or more first weights with one or more common pilot channels; a second pre-encode processing unit which multiplies, with the one or more common pilot channels, one or more second weights which are orthogonal to the first weights; and a combining unit which combines the first-weights-multiplied common pilot channels and the second-weights-multiplied common pilot channels, wherein the combined common pilot channels are transmitted from the multiple antennas. | 01-14-2010 |
20100014486 | BASE STATION, MOBILE STATION, AND METHOD OF GENERATING PILOT CHANNELS - A base station for generating pilot channels which are orthogonal among N (N>=4) sectors, includes a sequence generating unit configured to generate a phase rotation sequence which specifies the amount of phase rotation for each sector in a frequency domain such that there is more than 2π/N difference between the amount of phase rotation applied in each sector and that applied in its adjacent sectors; and an orthogonal sequence multiplying unit configured to apply the corresponding amount of phase rotation in the frequency domain, which is selected from the phase rotation sequence, to one of the pilot channels in each sector. | 01-21-2010 |
20100014490 | MOBILE STATION APPARATUS AND BASE STATION APPARATUS - One aspect of the present invention relates to a mobile station apparatus, including: a first time multiplexing unit configured to time multiplex an uplink CQI measurement pilot channel for measuring an uplink CQI and an uplink L1/L2 control channel; a second time multiplexing unit configured to time multiplex a shared data channel and a shared data channel demodulation reference signal for demodulating the shared data channel; and a TTI multiplexing unit configured to time multiplex a CQI measurement reference signal and a data transmission signal into different TTIs, the CQI measurement reference signal resulting from the time multiplexing of the uplink CQI measurement pilot channel and the uplink L1/L2 control channel, the data transmission signal resulting from the time multiplexing of the shared data channel and the shared data channel demodulation reference signal. | 01-21-2010 |
20100014660 | DOWNLINK SCRAMBLING METHOD AND BASE STATION - A disclosed base station randomizes downlink physical channels in OFDM radio access by scrambling codes suitable for the respective physical channels. The base station includes a base-station-specific scrambling code generating unit configured to generate a base-station-specific scrambling code for randomizing downlink physical channels; a sector-specific orthogonal sequence generating unit configured to generate a sector-specific orthogonal sequence; and a multiplication control unit configured to determine, for each of the physical channels, whether to multiply the base-station-specific scrambling code by the sector-specific orthogonal sequence based on whether each of the physical channels requires soft combining. | 01-21-2010 |
20100027512 | TRANSMITTING DEVICE, RECEIVING DEVICE, AND METHOD USED IN MOBILE COMMUNICATION SYSTEM EMPLOYING OFDM - A transmitting device includes a transmission signal generating unit configured to generate a transmission signal by inverse-Fourier-transforming reference signals and data signals mapped to subcarriers and a transmitting unit configured to wirelessly transmit the transmission signal. In the transmitting device, a total power level allocated to signals to be transmitted in a time slot is equal to a total power level allocated to signals to be transmitted in any other time slot, and a power density per unit bandwidth of the reference signals is greater than a power density per unit bandwidth of the data signals. This configuration makes it possible to equalize the total transmission power level of all time slots and thereby to improve the power amplification efficiency. Also, with this configuration, since the reference signals are transmitted with a higher power than that for other signals, it is possible to improve the accuracy of channel estimation. | 02-04-2010 |
20100034076 | BASE STATION, USER APPARATUS, AND METHOD - A base station used in a mobile communications system which uses orthogonal frequency division multiplexing (OFDM) for downlink is disclosed. The base station includes: a unit which provides a reference signal; a unit which multiplexes a control signal and the reference signal, and generates a transmit symbol; and a unit which inverse Fourier transforms the transmit symbol and wirelessly transmits the transformed transmit symbol, wherein a first sequence including a random code sequence and a second sequence belonging to an orthogonal-code sequence group are multiplied with the reference signal, mutually different ones of the orthogonal code sequences are used in the respective multiple sectors belonging to the same cell, and different ones of the random code sequences are used in the respective two or more cells. | 02-11-2010 |
20100046403 | MOBILE COMMUNICATIONS SYSTEM, BASE STATION, USER APPARATUS, AND METHOD - A mobile communications system is disclosed. The mobile communications system includes: a first user apparatus for two-way communicating using frequency division duplex (FDD); a second user apparatus for two-way communicating using time division duplex (TDD); and a base station for communicating with the first and second user apparatuses. The base station distinguishes among the simultaneous transmitting and receiving schemes of the user apparatuses based on user-apparatus specific user identification information, flag information showing a simultaneous transmitting and receiving scheme that is included in an uplink control channel, or signatures, a proper use of which is made according to the simultaneous transmitting and receiving scheme. | 02-25-2010 |
20100046445 | DOWNLINK MIMO TRANSMISSION CONTROL METHOD AND BASE STATION APPARATUS - A method of controlling downlink transmission from a base station having multiple antennas to a mobile station having multiple antennas includes the steps of applying open loop-type MIMO diversity to one or more common control channels, an MBMS channel, and an L1/L2 control channel; and applying closed loop-type MIMO multiplexing and/or MIMO diversity to a shared data channel. | 02-25-2010 |
20100048237 | BASE STATION APPARATUS, USER EQUIPMENT, AND METHOD USED IN MOBILE COMMUNICATION SYSTEM - A base station apparatus is disclosed that is capable of communicating with user equipment used in a mobile communication system. The base station apparatus includes a determination unit determining whether a path loss value reported from the user equipment satisfies a predetermined condition, an instruction signal generation unit, based on a result of the determination made by the determination unit, generating an instruction signal indicating whether the user equipment should reduce a transmission power value in response to a request from an other cell to reduce the transmission power value, and a transmission unit transmitting the instruction signal to the user equipment. Further, the path loss value is derived based on an average receiving quality value and a target quality value. | 02-25-2010 |
20100054184 | CELL SEARCH METHOD, MOBILE STATION, AND BASE STATION - A cell search method performed by a mobile station for communication in an OFDM system includes a first step of detecting a timing and a carrier frequency of a primary synchronization channel based on correlation detection between a primary synchronization channel sequence and a received signal; a second step of determining a timing and a carrier frequency of a secondary synchronization channel based on the timing and the carrier frequency of the primary synchronization channel and detecting cell-specific control information including a frame timing and a cell ID group; and a third step of performing correlation detection on each cell ID in the cell ID group with a common pilot symbol on a common pilot channel and identifying a cell ID from the cell ID group. | 03-04-2010 |
20100085925 | BASE STATION - A base station communicating with a user device using multiple antennas in a system where a subframe is composed of multiple slots each composed of multiple basic time units is disclosed. The base station includes a first mapping unit configured to map one or more reference signals used for demodulation of one or more L1/L2 control channels and one or more data channels to be transmitted from one or more of the antennas within a predetermined number of basic time units from the beginning of each subframe; and a second mapping unit configured to map reference signals used for demodulation of data channels to be transmitted from other ones of the antennas to one or more basic time units following the basic time units to which the reference signals used for demodulation of the L1/L2 control channels and the data channels are mapped. | 04-08-2010 |
20100103867 | BASE STATION APPARATUS, USER EQUIPMENT, AND METHOD USED IN MOBILE COMMUNICATION SYSTEM - A base station apparatus for a mobile communication system is disclosed that includes a unit to receive an uplink reference signal transmitted from user equipment, a unit to provide transmission power control data indicating whether a transmission power value of the uplink reference signal to be transmitted later is to be changed, a unit to derive a first offset power value so that the uplink control signal is transmitted at a power value determined by adding the first offset power value to the transmission power value of the uplink reference signal, a unit to derive a second offset power value so that the uplink control signal is transmitted at a power value determined by adding the second offset power value to the transmission power value of the uplink reference signal, and a unit to report the data and values to the user equipment. | 04-29-2010 |
20100103890 | BASE STATION APPARATUS, USER APPARATUS, AND METHOD USED IN MOBILE COMMUNICATIONS SYSTEM - A base station apparatus in a mobile communications system which uses orthogonal frequency division multiplexing (OFDM) for downlink is disclosed. The base station includes a unit which generates a first signal; a unit which generates a second signal; a unit which multiplexes the first signal and the second signal to map the multiplexed signals to a sub-carrier to generate a transmit symbol; and a mapping determining unit which determines a position of mapping the second signal to the sub-carrier, wherein the mapping determining unit determines the mapping position based on a cell ID or cell group ID, and a mapping pattern defined with a sequence having two-stage structure. | 04-29-2010 |
20100103891 | 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. | 04-29-2010 |
20100111044 | MOBILE STATION, BASE STATION, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A communication system is provided with a plurality of mobile stations and a base station. A mobile station makes a pilot channel composed of a Cassak code correspond to a signal having a plurality of frequency components in a predetermined band disposed in parallel with each other in a constant distance. A mobile station transmits a transmission signal including such a signal in accordance with a scheduling signal. The mobile station also makes its own transmission signal correspond to transmission signals of other mobile stations using different bands from a band of that own transmission signal in order for the former to be orthogonal with the latter on a frequency axis. A base station calculates a difference between a receiving signal and a replica of the pilot channel to infer a channel. The base station decodes the receiving signal by using a channel inference result. The replica of the pilot signal is generated by corresponding the pilot channel composed of the Cassac code to the predetermined band disposed in parallel with each other at the constant distance. | 05-06-2010 |
20100111204 | TRANSMISSION APPARATUS AND TRANSMISSION METHOD - The object is achieved by providing a transmission apparatus with: assignment means configured to assign, to each user, one of a frequency block that is obtained by dividing a system bandwidth into each block of continuous frequency subcarriers and a distributed type frequency block that include a frequency subcarrier that is discretely distributed in the system bandwidth; and mapping means configured to assign transmission data to one of the frequency block and the distributed type frequency block according to the assignment. | 05-06-2010 |
20100118773 | USER DEVICE, BASE STATION, AND METHOD - A disclosed user device generates an uplink control channel including at least one of acknowledgement information and a channel quality indicator regarding downlink and transmits the uplink control channel via a dedicated frequency band when no resource is allocated for transmission of an uplink data channel. The uplink control channel includes multiple unit blocks constituting a subframe and each of the unit blocks includes a sequence generated by multiplying all chips of an orthogonal code sequence assigned to the user device by the same factor. | 05-13-2010 |
20100118825 | RADIO BASE STATION USED IN MOBILE COMMUNICATION SYSTEM - A disclosed radio base station is used in a mobile communication system employing a single carrier scheme for uplink and includes a scheduler configured to allocate radio resources such that a first control channel accompanying an uplink data channel is transmitted using the same frequency band allocated to the uplink data channel and a second control channel, which is to be transmitted regardless of presence or absence of the uplink data channel, is transmitted using a dedicated frequency band reserved for the second control channel if no frequency band is allocated to the uplink data channel; and a reporting unit configured to report scheduling information indicating the allocation results to a user device. The scheduler is configured not to allocate the radio resources to the uplink data channel of the user device in a unit transmission period reserved for transmission of the second control channel of the user device. | 05-13-2010 |
20100128675 | BASE STATION APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM - A base station apparatus in a mobile communication system allowing for user equipment terminals having different numbers of receiving antennas is disclosed. The base station apparatus includes a mapping unit mapping a reference signal, a primary broadcasting signal, a synchronization signal, and an L1/L2 control signal onto a predetermined signal format; and a transmission unit transmitting the mapped signals, in which, within a sub-frame, the mapping unit maps the L1/L2 control signal and the primary broadcasting signal so as to be time-domain multiplexed, maps the primary broadcasting signal and the synchronization signal within a predetermined bandwidth in a middle of a system bandwidth, maps a reference signal included in a predetermined transmission stream within the predetermined bandwidth, but does not map a reference signal included in a transmission stream other than the predetermined transmission stream within the predetermined bandwidth. | 05-27-2010 |
20100128805 | TRANSMITTER, RECEIVER AND COMMUNICATION METHOD - A transmission device includes: system information generation means for generating system information; multiplexing means for multiplexing system information required for cello search among the system information with a report channel and multiplexing system information other than the system information required for the cell search with a common data channel; and transmission means for transmitting the report channel and the common data channel. | 05-27-2010 |
20100135257 | BASE STATION, MOBILE STATION, AND SYNCHRONIZATION CHANNEL TRANSMISSION METHOD - A base station communicating with a mobile station in a radio communication system by using OFDM for downlink is disclosed. The base station includes a sequence selecting unit configured to select multiple synchronization signal sequences; a synchronization signal generating unit configured to generate a secondary synchronization channel based on a part of the selected synchronization signal sequences and another part of the selected synchronization signal sequences; and a transmitting unit configured to transmit the secondary synchronization channel. The secondary synchronization channel is used to detect cell-specific information. | 06-03-2010 |
20100150087 | BASE STATION APPARATUS, USER EQUIPMENT, AND METHOD IN MOBILE COMMUNICATION SYSTEM - A base station apparatus is disclosed to be used in a mobile communication system where Persistent Scheduling is performed. The base station apparatus includes a radio communication unit configured to perform radio communications with a specific user equipment terminal using radio resources provided every predetermined period based on the Persistent Scheduling and an allocation unit configured to allocate radio resources to a user equipment terminal other than the specific user equipment by selecting the radio resources that are not used for uplink or downlink packet data for the specific user equipment from among radio resources provided the every predetermined period. | 06-17-2010 |
20100157934 | 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. | 06-24-2010 |
20100177688 | MOBILE COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER APPARATUS AND METHOD - A base station apparatus for use in a mobile communication system includes: a unit configured to generate a reference signal; a unit configured to generate a transmission symbol including the reference signal; a unit configured to transmit the transmission symbol for each sector; and a unit configured to monitor a radio propagation state. The reference signal is generated by multiplying a first sequence formed by a non-orthogonal code sequence which is different at least between an adjacent cell and an own cell, by a second sequence. Whether to form the second sequence by using an orthogonal code sequence which is different among sectors or by using a non-orthogonal code sequence is determined according to the radio propagation state. | 07-15-2010 |
20100177697 | 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. | 07-15-2010 |
20100182923 | USER EQUIPMENT TERMINAL, BASE STATION APPARATUS, AND CHANNEL STATE INFORMATION COMMUNICATION METHOD - A user equipment terminal estimates a channel state, encodes channel state information representing the estimated channel state, and transmits the channel state information over plural transmission time intervals. A base station apparatus receives the channel state information over plural transmission time intervals, decodes the channel state information, and assigns resources based on the channel state information. The present invention provides the user equipment terminal, the base station apparatus, and a channel state information communication method. | 07-22-2010 |
20100182966 | BASE STATION APPARATUS, MOBILE STATION APPARATUS, AND METHOD OF TRANSMITTING SYNCHRONIZATION CHANNELS - A base station apparatus in a radio communications system is disclosed. The base station apparatus communicates with a mobile station using an OFDM scheme in downlink. The base station apparatus includes a sync signal generating unit which generates a secondary sync channel; a multiplying unit which multiplies a scramble code with the secondary sync channel; and a transmitting unit which transmits the secondary sync channel with which the scramble code is multiplied. Cell-specific information is detected by the secondary sync channel. | 07-22-2010 |
20100184447 | RADIO COMMUNICATION CONTROL METHOD, BASE STATION APPARATUS AND USER APPARATUS - The base station apparatus includes: a distributed transmission determination unit ( | 07-22-2010 |
20100197336 | TRANSMIT POWER CONTROL METHOD, BASE STATION APPARATUS AND USER APPARATUS - Even if no uplink transmission grant is assigned from a base station, transmit power can be controlled in uplinks with accuracy to some extent. An aspect of the present invention relates to a base station apparatus for use in a radio communication system using a shared channel, comprising: a transmit power control information generation unit configured to generate transmit power control information for a user apparatus based on an uplink signal transmitted from the user apparatus; a radio resource control unit configured to transmit the generated transmit power control information together with an uplink assignment message if an uplink radio resource is assigned to the user apparatus and to supply radio resource assignment information to transmit the generated transmit power control information as independent transmit power control information if no uplink radio resource is assigned to the user apparatus. | 08-05-2010 |
20100232333 | 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. | 09-16-2010 |
20100235720 | CHANNEL ENCODING AND DECODING APPARATUSES AND METHODS - An encoding apparatus for use in a radio transmitter has a unit for turbo-SPC encoding a plurality of information bits which bits constitute a transmit signal, and deriving at least one set of redundant bits from one set of the information bits; and a redundancy-adjusting unit for decreasing or increasing the redundant bits according to a channel-encoding rate designated by a control signal, and adjusting the ratio of the number of the information bits to the number of the redundant bits. At least some of the redundant bits decreased or increased by the redundancy-adjusting unit are derived from an identical set of the information bits. | 09-16-2010 |
20100240379 | TRANSMISSION DEVICE, RECEPTION DEVICE AND RANDOM ACCESS CONTROL METHOD - A transmission device according to an embodiment of the present invention includes a random access channel generation portion that generates a random access channel; an assignment portion that performs one of a continuous frequency assignment and a discontinuous comb-shaped frequency assignment for each user; and a transmission portion that transmits the random access channel with variable multi-bandwidth in accordance with the assignment, in a frequency band assigned to a contention-based channel. | 09-23-2010 |
20100246512 | MOBILE STATION, BASE STATION, UPLINK TRANSMISSION METHOD, AND DOWNLINK TRANSMISSION METHOD - A mobile station includes a channel quality estimation unit configured to estimate downlink channel quality based on a reference signal from a base station and to output the estimated downlink channel quality as channel estimation information; an acknowledgement information determining unit configured to determine whether a downlink data channel from the base station is correctly received and to output the determination result as acknowledgement information; and an acknowledgement information prioritizing unit configured to cause the acknowledgement information to be preferentially transmitted to the base station if transmission timings of the channel estimation information and the acknowledgement information coincide. | 09-30-2010 |
20100254276 | MOBILE COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER EQUIPMENT, AND METHOD - A disclosed base station apparatus includes a measurement unit measuring received quality of a reference signal, a scheduling unit providing scheduling information indicating allocation of a radio resource in uplink, and a transmission unit transmitting a control signal including the scheduling information. Further when, after a first packet is transmitted using a first frequency band, a retransmission packet of the first packet is transmitted using a second frequency band other than the first frequency band, the control signal further includes information indicating a difference between received quality in the first frequency band and that in the second frequency band, and the retransmission packet is transmitted at a transmission power level determined by adding a transmission power level of the first packet to that corresponding to the difference. | 10-07-2010 |
20100260119 | USER EQUIPMENT TERMINAL, BASE STATION AND CONTROL INFORMATION TRANSMISSION METHOD - A user equipment terminal for transmitting control information to a base station according to a single carrier scheme includes a wideband control information generating unit configured to generate wideband control information for a whole system band or a portion thereof; a frequency-selective control information generating unit configured to generate frequency-selective control information; and a control unit configured to control the wideband control information to be transmitted on a control channel or a data channel and control the frequency-selective control information to be transmitted on the data channel. | 10-14-2010 |
20100272152 | SIGNAL SEQUENCE GENERATING METHOD, CONTROL INFORMATION GENERATING APPARATUS AND USER EQUIPMENT TERMINAL - A signal sequence generating method of generating a signal sequence used by a user equipment terminal in a mobile communication system includes the steps of generating, by a base station, a predetermined hopping pattern; generating, by the base station, a hopping sequence by applying an offset to the predetermined hopping pattern; transmitting, by the base station, the hopping sequence to the user equipment terminal; and generating, by the user equipment terminal, the signal sequence according to the hopping sequence. | 10-28-2010 |
20100290544 | BASE STATION, MOBILE STATION AND METHOD - A single carrier scheme is used in an uplink in the mobile communication system. A base station used in the mobile communication system includes: means configured to perform communication with a mobile station that uses the whole or a part of a system frequency band; storage means configured to store correspondence relationship between radio parameters including a bandwidth, a modulation scheme and a channel coding rate of the uplink and filter parameters including at least a roll-off factor of a band limitation filter; and determination means configured to determine radio parameters and filter parameters for each mobile station based on the correspondence relationship according to channel state of the uplink. The radio parameters and the filter parameters determined in the determination means are reported to the mobile station. | 11-18-2010 |
20100291925 | USER EQUIPMENT AND VERIFICATION METHOD - A user equipment performing a cell search and detecting cell-specific information including a cell ID. The user equipment includes a receiving unit configured to receive a synchronization channel; a cell search unit configured to extract a primary synchronization channel and a secondary synchronization channel from the received synchronization channel to perform the cell search; and a verification unit configured to verify a detection result of the cell search based on a verification start condition. | 11-18-2010 |
20100296459 | BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - A base station apparatus used in a mobile communication system to which an OFDM scheme is applied in downlink is provided with: a scheduler configured to perform assignment of radio resources to a user apparatus for each subframe; a control channel generation unit configured to generate a control channel for reporting a result of scheduling by the scheduler to the user apparatus; and a mapping unit configured to map the control channel and a data channel, wherein the control information includes information indicating a radio resource amount used for the control channel, and the mapping unit multiplexes information indicating the radio resource amount used for the control channel into a first OFDM symbol. | 11-25-2010 |
20100309857 | MOBILE COMMUNICATION SYSTEM, BASE STATION, USER DEVICE, AND METHOD - A user device transmitting at least an uplink control channel using a single carrier scheme includes a channel quality indicator generating unit configured to generate a channel quality indicator indicating a downlink radio propagation condition; and a transmitting unit configured to transmit the uplink control channel including the channel quality indicator using a dedicated frequency band when no radio resource is allocated for transmission of an uplink data channel. The transmitting unit is configured to transmit a predetermined number of unit blocks in each slot period. If a system bandwidth is greater than a predetermined value, a set of factors used to multiply some of the unit blocks belonging to the same slot and containing the same information represents an orthogonal sequence; and a predetermined number of symbol elements constituting each of the some of the unit blocks represent at least a part of the channel quality indicator. | 12-09-2010 |
20100316156 | BASE STATION APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM - A base station apparatus used in a mobile communication system where user terminals with various numbers of reception antennas may be situated includes a providing unit configured to provide plural reference signals according to the number of transmission antennas; a precoding unit configured to replicate each of a predetermined number of input signal sequences according to the number of transmission antennas, apply a predetermined precoding vector to each of the replicated sequences, and generate output signal sequences corresponding to the number of transmission antennas; and a transmitting unit configured to transmit transmission signals including the output signal sequences from plural transmission antennas; wherein at least one of the input signal sequences includes a control signal and one of the plural reference signals. | 12-16-2010 |
20110007778 | BASE STATION, USER DEVICE, AND COMMUNICATION CONTROL METHOD - Multiple reference signal transmission bandwidths are defined for system frequency bands and hierarchical reference signal bandwidths are defined for each reference signal transmission bandwidth such that a reference signal bandwidth lower than a highest-order reference signal bandwidth is a division of a higher-order reference signal bandwidth. A base station stores reference signal bandwidth information indicating the hierarchical reference signal bandwidths for each system frequency band; broadcasts the reference signal bandwidth information corresponding to a reference signal transmission bandwidth used by the base station; sets a frequency hopping bandwidth for a reference signal; reports, to a user device, the frequency hopping bandwidth and a reference signal bandwidth as assigned reference signal transmission bandwidth information; sets a reference signal transmission frequency band within the frequency hopping bandwidth based on the reference signal bandwidth information and the assigned reference signal transmission bandwidth information; and receives the reference signal from the user device. | 01-13-2011 |
20110009139 | METHOD FOR REPORTING CHANNEL QUALITY INFORMATION VIA UPLINK, AND BASE STATION AND USER DEVICE ADAPTED FOR THE METHOD - A base station for a mobile communication system includes a speed detecting unit configured to detect the moving speed of a user device based on a signal received from the user device and indicating the moving speed; and a determining unit configured to select, based on the moving speed detected by the speed detecting unit, a wideband channel quality indicator indicating reception quality of an entire system frequency band allocated to the mobile communication system, or a combination of the wideband channel quality indicator and one or more channel quality indicators of subbands in the system frequency band as channel quality information that needs to be reported from the user device to the base station. | 01-13-2011 |
20110026417 | BASE STATION AND METHOD FOR USE IN MOBILE COMMUNICATION SYSTEM - A base station for use in a mobile communication system includes: a measurement unit configured to measure one or more pieces of statistical data in the number of users in a cell, a user distribution state or a traffic amount; and a deriving unit configured to derive a value of a radio parameter corresponding to currently measured statistical data from predetermined correspondence relationship between the statistical data and the radio parameter. A value of the radio parameter set as office data in the base station is automatically updated to a value derived by the deriving unit. | 02-03-2011 |
20110026471 | BASE STATION - A base station communicates with a user device transmitting an uplink signal based on a single-carrier transmission scheme. The base station includes a frequency hopping determining unit configured to determine whether to apply frequency hopping to the user device based on radio-wave propagation information from the user device and a traffic type of data to be transmitted by the user device; a scheduler configured to allocate frequencies to the user device based on uplink channel reception conditions of the user device; and a reporting unit configured to report allocation information indicating resource units allocated by the scheduler to the user device. When the frequency hopping determining unit determines to apply the frequency hopping to the user device, the scheduler allocates, to the user device, resource units with different frequency bands in different slots. | 02-03-2011 |
20110026642 | MOBILE COMMUNICATION SYSTEM, TRANSMITTING DEVICE, RECEIVING DEVICE, AND METHOD - A transmitting device for a mobile communication system employing a multicarrier scheme includes a mapping unit configured to map control information to subcarriers in a subframe; an inverse Fourier transform unit configured to inverse-Fourier-transform a signal of the mapped control information; and a transmitting unit configured to wirelessly transmit a transmission signal including the inverse-Fourier-transformed signal to a receiving device. The control information is mapped to control frequency bands that are discontinuous in the frequency domain and are provided across the subframe separately from frequency bands for a shared data channel. The mapping is performed such that the control information for the receiving device mapped to one of the control frequency bands is transmitted at the same time as the control information or the shared data channel for the receiving device mapped to a different frequency band. | 02-03-2011 |
20110032887 | 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. | 02-10-2011 |
20110044159 | BASE STATION APPARATUS, MOBILE STATION APPARATUS AND SYNCHRONIZATION CHANNEL TRANSMISSION METHOD - A base station apparatus is disclosed for use in a mobile communication system including multiple cells having multiple sectors. The base station apparatus includes a synchronization channel generation unit configured to generate a synchronization channel for use in cell search by a user apparatus and a transmitting unit configured to wirelessly transmit a signal including the synchronization channel. The synchronization channel includes a primary synchronization channel and a secondary synchronization channel. The primary synchronization channel includes multiple types of sequences, and the secondary synchronization channel transmitted in a sector of a cell includes a code derived from a predefined generation polynomial equation corresponding to the primary synchronization channel. | 02-24-2011 |
20110051711 | MOBILE STATION, BASE STATION, BASIC FREQUENCY BLOCK SPECIFYING METHOD AND BAND CONTROL METHOD - A base station includes a receiving unit configured to receive a UE capability regarding a bandwidth from a mobile station; and a specifying unit configured to specify, among plural basic frequency blocks included in a system band, one or more basic frequency blocks to be used by the mobile station based on the UE capability. | 03-03-2011 |
20110075750 | BASE STATION APPARATUS, USER APPARATUS, AND METHOD USED IN MOBILE COMMUNICATION SYSTEM - A base station apparatus is used in a region in which a first system and a second system co-exist. In the first system, mobile communication is conducted using a variable system bandwidth not more than a basic bandwidth. In the second system, mobile communication is conducted using a variable system bandwidth which is not more than a bandwidth of an advanced system band which is at least as wide as multiple of the basic bandwidths. The base station apparatus generates a control signal for the first system and a control signal for the second system, orthogonally multiplexes them, and includes the same in a downlink signal to transmit the downlink signal. The advanced system band is divided such that it includes multiple of areas (P, Q, R, S) of the basic bandwidth. The control signal for the first system is included in one of the areas (Q). The control signal for the second system is included in at least one of the areas (P, Q, R, S). | 03-31-2011 |
20110085536 | BASE STATION, USER EQUIPMENT TERMINAL AND METHOD - A base station for communicating with a first user equipment terminal within a first system band and communicating with a second user equipment terminal within a second system band includes a first reference signal sequence generating unit configured to generate M types of reference signal sequences; a second reference signal sequence generating unit configured to generate N (N>M) types of reference signal sequences; a scheduling unit configured to allocate resource blocks to the first user equipment terminal and the second user equipment terminal; a signal multiplexing unit configured to multiplex the M types of reference signal sequences into the resource block for the first user equipment terminal and multiplex the N types of reference signal sequences into the resource block for the second user equipment terminal; and a transmitting unit configured to transmit signals including the M types of reference signal sequences and the N types of reference signal sequences. | 04-14-2011 |
20110103366 | BASE STATION, MOBILE STATION AND FREQUENCY DIVISION MULTIPLEXING COMMUNICATION METHOD - Provided is a base station comprising a multiplexer so constituted as to frequency-divide/multiplex a first channel for transmitting first data to be transmitted to a plurality of mobile stations, and a second channel for transmitting second data to be transmitted to one mobile station. | 05-05-2011 |
20110105138 | MOBILE COMMUNICATION SYSTEM AND RADIO RESOURCE ASSIGNMENT METHOD - In a mobile communication system including a first base station and a second base station, the first base station includes: a user information obtaining unit configured to obtain user information in the first base station, and the second base station includes: a user information obtaining unit configured to obtain user information in the second base station; a base station internal information collection unit configured to collect user information in the first and the second base stations; and a resource assignment determination unit configured to determine radio resources that can be used by the first base station and radio resources that can be used by the second base station based on the user information in the first and the second base stations. | 05-05-2011 |
20110110320 | BASE STATION, MOBILE STATION AND COMMON INFORMATION COMMUNICATING METHOD - A base station for transmitting both common information which is used in common by plural mobile stations and control information indicating that the common information is changed includes a common information generating unit configured to generate the control information and the common information; a lower-layer control information generating unit configured to generate first lower-layer control information indicating a radio resource where the control information is to be placed and second lower-layer control information indicating a radio resource where the common information is to be placed; a multiplexing unit configured to multiplex the first lower-layer control information and the control information into a plurality of frequency blocks included within a system bandwidth and multiplex the second lower-layer control information and the common information into one or more frequency blocks among the plurality of frequency blocks included within the system bandwidth, the system bandwidth being divided into the plurality of frequency blocks each corresponding to a minimum value of maximum transmission and reception bandwidths used by the plural mobile stations; and a transmitting unit configured to transmit the multiplexed first lower-layer control information, control information, second lower-layer control information, and common information. | 05-12-2011 |
20110110321 | BASE STATION, MOBILE STATION AND COMMON INFORMATION COMMUNICATING METHOD - A base station for transmitting common information which is used in common by plural mobile stations includes a common information generating unit configured to generate the common information; a lower-layer control information generating unit configured to generate lower-layer control information indicating a radio resource where the common information is to be placed; a multiplexing unit configured to multiplex the lower-layer control information and the common information into one or more frequency blocks among a plurality of frequency blocks included within a system bandwidth, the system bandwidth being divided into the plurality of frequency blocks each corresponding to a minimum value of maximum transmission and reception bandwidths used by the plural mobile stations; and a transmitting unit configured to transmit the multiplexed lower-layer control information and common information. | 05-12-2011 |
20110116464 | BASE STATION APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM - A base station apparatus includes a scheduler configured to schedule assignment of radio resources based on a scheduling coefficient for one or more user equipments, a control signal generation unit configured to generate a control signal including reporting indication information for indicating whether the user equipment is to report downlink channel state information and scheduling grant information for indicating the scheduled assignment of the radio resources and a transmitting unit configured to transmit the control signal in a downlink. A cumulative value is calculated for each of the user equipments. The reporting indication information transmitted to a user equipment, whose cumulative value reaches a predefined value, indicates that the user equipment is to report the downlink channel state information. The cumulative value is updated if the scheduling coefficient satisfies a predefined condition. | 05-19-2011 |
20110116465 | BASE STATION APPARATUS, USER EQUIPMENT AND METHOD IN MOBILE COMMUNICATION SYSTEM - A downlink control channel transmitted from a base station apparatus includes multiple control channel elements (CCEs), and different PUCCH resources are determined depending on which CCEs are associated with control information destined for user equipments. If a PDSCH in a certain subframe is assigned to a user equipment in an old system, the control information destined for the user equipment is assigned to a certain CCE, and a PDSCH in a subframe after a predefined time period from the certain subframe is assigned to a user equipment in a new system, the control information destined for the user equipment may be associated with a CCE different from the certain CCE. Alternatively, the control information destined for the user equipment in the second system may be associated with the same CCE as the control information destined for the user equipment in the first system but may be spread with different spread codes. | 05-19-2011 |
20110149771 | MOBILE STATION AND RADIO BASE STATION - A mobile station (UE) according to the present invention includes: a CP length determiner unit ( | 06-23-2011 |
20110158150 | BASE STATION APPARATUS AND METHOD - 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. | 06-30-2011 |
20110164532 | USER APPARATUS, BASE STATION APPARATUS, AND COMMUNICATION CONTROL METHOD - A user apparatus to which radio access schemes of 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 radio access scheme is the single-carrier scheme; a serial parallel conversion unit configured to perform serial parallel conversion on the modulated symbol sequence when the radio access scheme is the multicarrier scheme; a frequency domain signal generation unit configured to assign radio resources to the modulated symbol sequence on which discrete Fourier transform has been performed or to the demodulated symbol sequence on which serial parallel conversion has been performed so as to generate a signal in the frequency domain; a waveform shaping filter configured to perform waveform shaping on the signal in the frequency domain; a transmission signal generation unit configured to perform inverse fast Fourier transform on the signal in the frequency domain on which waveform shaping has been performed so as to generate a transmission signal; and a transmission unit configured to transmit the transmission signal by radio. | 07-07-2011 |
20110164659 | CLOSED-LOOP TRANSMISSION POWER CONTROL METHOD, BASE STATION APPARATUS AND TERMINAL - In a closed-loop TPC for a channel using a wireless resource, to which frequency hopping is applied, a high quality reception is achieved for all RBs without applying another technique to each RB. This transmission power control method, in a mobile communications system that transmits signals by frequency hopping in a plurality of resource blocks, includes a transmission power control method that transmission-power controls a channel in a closed loop using a wireless resource to which frequency hopping is applied, measures a reception channel quality of received signals for each resource block (RB | 07-07-2011 |
20110164662 | MOBILE COMMUNICATIONS SYSTEM, COMMUNICATIONS APPARATUS, AND COMMUNICATIONS METHOD - A communications apparatus includes a receiving unit which receives a data channel for each predetermined transmission period; a determining unit which determines, for each data channel, acknowledgement information which indicates an acknowledgement or a non-acknowledgement; a generating unit which generates a control channel including the acknowledgement information; and a transmitting unit which transmits the control channel. For first and second data channels received during at least successive first and second transmission periods, the first and second acknowledgement information is provided. The second control channel which includes both the first and the second acknowledgement information which includes both the first and the second acknowledgement information is transmitted after a first control channel which includes the first acknowledgement information. | 07-07-2011 |
20110170438 | RADIO COMMUNICATIONS SYSTEM, BASE STATION, USER APPARATUS, AND METHOD - A mobile communications system having a first base station and one or more second base stations is disclosed, wherein the first base station includes a first generator which generates a first known signal for use in common between the first base station and the second base station and a second known signal use specific to each of the first base station and the second base station, and a radio transmitter which wirelessly transmits, to a subordinate terminal apparatus, the first known signal and the second known signal which are generated by the first generator. | 07-14-2011 |
20110170439 | RADIO BASE STATION APPARATUS AND MOBILE TERMINAL - To provide a radio base station apparatus and mobile terminal supporting each of a plurality of mobile communication systems when the plurality of mobile communication systems coexists, the radio base station apparatus assigns a modulated signal of a control signal to at least one frequency band with the system band of the LTE system as a unit on a predetermined data block basis (CCE basis) according to a predetermined rule, and when data blocks are assigned according to the rule as shown in FIG. | 07-14-2011 |
20110182246 | COMMUNICATION CONTROL METHOD AND ITS APPLIED BASE STATION - A disclosed communication control method includes determining a number of bits for transmitting downlink shared data channel information based on one or both of a number of users and a traffic amount and generating a signal for the downlink shared data channel information to be transmitted with the determined number of bits. | 07-28-2011 |
20110183673 | RADIO BASE STATION APPARATUS AND MOBILE TERMINAL - To provide a radio base station apparatus and mobile terminal for enabling cell selection to be performed in a faster cell switching period in handover, the radio base station apparatus of the invention has a plurality of transmission/reception sections capable of being extended to remote sites, an FCS application determining section that determines whether to apply fast cell selection in handover based on information from the mobile terminal, and a multi-cell scheduling control section that controls transmission/non-transmission of the first and second transmission/reception sections when the FCS application determining section determines that FCS is applied. | 07-28-2011 |
20110183705 | CENTRALIZED-CONTROL BASE STATION AND SIGNAL CONTROL METHOD - A centralized-control base station connected to a first transceiving unit and a second transceiving unit includes a first signal quality obtaining unit configured to obtain both uplink signal quality from a mobile station to the first transceiving unit and downlink signal quality from the first transceiving unit to the mobile station; a second signal quality obtaining unit configured to obtain both uplink signal quality from the mobile station to the second transceiving unit and downlink signal quality from the second transceiving unit to the mobile station; and a control unit configured to allow downlink data to be transmitted from the first transceiving unit, downlink feedback information to be received by the second transceiving unit, uplink data to be received by the second transceiving unit, and uplink feedback information to be transmitted from the first transceiving unit, when the downlink signal quality from the first transceiving unit to the mobile station is better than the downlink signal quality from the second transceiving unit to the mobile station and the uplink signal quality from the mobile station to the second transceiving unit is better than the uplink signal quality from the mobile station to the first transceiving unit. | 07-28-2011 |
20110188467 | USER DEVICE, BASE STATION, AND COMMUNICATION METHOD FOR MOBILE COMMUNICATION SYSTEM - A user device for a mobile communication system employing a multicarrier scheme includes a control signal generating unit ( | 08-04-2011 |
20110188558 | USER APPARATUS AND CELL SEARCH METHOD - A user apparatus for performing cell search includes: a timing information detection unit configured to detect timing information of a synchronization signal transmitted from a connected base station; a secondary synchronization channel correlation detection unit configured to detect a correlation of a secondary synchronization channel included in a synchronization signal transmitted by other base station other than the connected base station by using the timing information detected by the timing information detection unit; and a secondary synchronization channel detection unit configured to detect the secondary synchronization channel based on a result of the correlation detection by the secondary synchronization channel correlation detection unit. | 08-04-2011 |
20110189988 | USER APPARATUS, RADIO BASE STATION, AND METHOD - A mobile communications system includes a radio base station and a remote radio apparatus connected with a high-speed transmission medium to the radio base station. A user apparatus includes a unit which measures a received level of a signal transmitted from the radio base station and a received level of a signal transmitted from the remote radio apparatus and detects a change in relative magnitudes of measured values; a unit which measures a path loss between the user apparatus and the radio base station and a path loss between the user apparatus and the remote radio apparatus and detects a change in relative magnitudes of measured values; and a transmitter which transmits a report signal which shows that a predetermined event has occurred. The predetermined event occurs if the relative magnitudes of the received levels are reversed and/or if the relative magnitudes of the path losses are reversed. | 08-04-2011 |
20110190026 | CLOSED-LOOP TRANSMISSION POWER CONTROL METHOD AND RADIO BASE STATION APPARATUS - To set an optimal transmission power control interval such that a base station apparatus properly receives signals from a mobile station, while exploiting fast scheduling and fast AMC, in this closed-loop transmission power control method, reception SINR and average interference level are measured in a signal received in uplink, a time period for averaging reception quality is determined corresponding to an overlapped size of a dynamic range of a base station apparatus that is a region of overlapping a first reception-allowable range depend on reception capability of the base station apparatus, with a second reception-allowable range, varying corresponding to the interference level, depend on the number of a modulation and coding scheme set, each set achieving required throughput, the reception SINR is averaged using the determined time period, and a TPC command indicative of uplink transmission power to be controlled in a terminal apparatus is generated using a difference value between the averaged reception SINR and target reception SINR, and is transmitted in downlink. | 08-04-2011 |
20110194416 | COMMUNICATIONS CONTROL METHOD, SIGNAL GENERATING APPARATUS, AND RADIO COMMUNICATIONS APPARATUS INCLUDING THE SIGNAL GENERATING APPARATUS IN MOBILE COMMUNICATIONS SYSTEM - A method of controlling communications is disclosed. The method includes a step of determining whether reception of information from a mobile station is normal; a step of generating a first signal when it is determined to be normal, generating a second signal when it is determined to be abnormal and when the mobile station is instructed to retransmit information using a first radio resource used in previous transmission, and when it is determined to be abnormal and when the mobile station is instructed to retransmit the information using a second radio resource different from the first radio resource, generating the first signal and a third signal including information on the second radio resource; and a step of transmitting any one of the first signal, the second signal, and a combination of the first signal and the third signal, the first signal and the second signal and the combination of the first signal and the third signal being generated by the step of generating. | 08-11-2011 |
20110206026 | BASE STATION, MOBILE STATION, SIGNAL TRANSMISSION METHOD, AND SIGNAL RECEPTION METHOD - A base station for communicating within a system band including plural basic frequency blocks includes a signal generating unit configured to generate data and control signals; an intermediate signal generating unit configured to generate intermediate signals; a multiplexing unit configured to add one or more subcarriers such that center frequencies of signal bands for the respective basic frequency blocks are placed at predetermined frequency intervals, and multiplex the intermediate signals and data and control signals; and a transmitting unit configured to transmit the multiplexed signals. | 08-25-2011 |
20110207457 | USER EQUIPMENT AND CELL SEARCH METHOD - User equipment for performing cell search using a synchronization channel including a primary synchronization channel and a secondary synchronization channel includes a reception unit configured to receive a signal including the synchronization channel, a symbol timing candidate detection unit configured to detect multiple synchronization signal symbol timing candidates from the synchronization channel based on a correlation value in a time domain between the signal received at the reception unit and a replica signal of the primary synchronization channel, a secondary synchronization channel correlation detection unit configured to perform correlation detection for the secondary synchronization channel based on the multiple synchronization signal symbol timing candidates detected in the symbol timing candidate detection unit and a secondary synchronization channel detection unit configured to detect the secondary synchronization channel based on a result of the correlation detection by the secondary synchronization channel correlation detection unit. | 08-25-2011 |
20110216850 | MOBILE STATION - A mobile station configured to perform MIMO communication is disclosed, where the mobile station includes a control unit configured to determine a radio access scheme to be applied, based on at least one of a transmission frequency bandwidth to be used and a transmission stream number used in the MIMO communication. | 09-08-2011 |
20110217983 | MOBILE STATION, RADIO BASE STATION, AND MOBILE COMMUNICATION METHOD - A mobile station, where the mobile station includes a reception quality measurement unit, a channel quality information transmission unit, and a control signal transmission unit, where the reception quality measurement unit is configured to measure a reception quality of a pilot signal of each of a plurality of cells, when a radio link is established with the plurality of cells, where the channel quality information transmission unit is configured to transmit, to a first cell having the beset reception quality among the plurality of cells, channel quality information corresponding to the reception quality, and where the control signal transmission unit is configured to transmit, to a cell other than the first cell among the plurality of cells, a control signal requesting not to transmit a data signal by using the same resource as the first cell. | 09-08-2011 |
20110218009 | MOBILE COMMUNICATION METHOD, MOBILE COMMUNICATION SYSTEM AND RADIO BASE STATION - A mobile communication method is disclosed, where the mobile communication method includes the steps of determining, at a mobile station, a first cell with the largest interference amount among a plurality of cells in accordance with reception quality of a reference signal in the plurality of cells, when radio links are established between the mobile station and the plurality of cells, transmitting, from the mobile station to the plurality of cells, identification information of the first cell, and scheduling, at a radio base station which manages each of the plurality of cells, to transmit a data signal addressed to the mobile station via a resource that is unusable by the first cell. | 09-08-2011 |
20110218015 | TRANSMISSION POWER CONTROL METHOD, MOBILE COMMUNICATION SYSTEM AND RADIO BASE STATION - A transmission power control is disclosed, where the transmission power control includes transferring, from a second radio base station to a first radio base station, a second uplink signal received from a mobile station in a second cell, synthesizing, at the first radio base station, a first uplink signal received from the mobile station in a first cell with the second uplink signal transferred from the second radio base station, and generating and transmitting a transmission power control signal for controlling a transmission power of an uplink signal at the mobile station based on a reception quality of an uplink signal obtained by synthesizing the first uplink signal with the second uplink signal. | 09-08-2011 |
20110237290 | TRANSMISSION POWER CONTROL METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - To provide a transmission power control method, base station apparatus and mobile station apparatus for enabling the transmission power in the mobile station apparatus having a plurality of antennas to be properly controlled, enabled is one of a common control mode for transmitting a common TPC command to perform transmission power control common to antennas ( | 09-29-2011 |
20110243023 | BASE STATION APPARATUS, USER APPARATUS AND METHOD IN MOBILE COMMUNICATIONS SYSTEM - A base station apparatus includes multiple antennas including M physical antennas (# | 10-06-2011 |
20110243190 | MOBILE TERMINAL APPARATUS, BASE STATION APPARATUS AND METHOD FOR TRANSMITTING SHARED CHANNEL SIGNAL - In order to improve the reception quality of a shared channel signal transmitted on uplink or downlink, the present invention provides a mobile terminal apparatus that transmits a shared channel signal on uplink by using a predetermined number of basic frequency blocks out of a plurality of basic frequency blocks divided from a system band, each of the basic frequency blocks having a predetermined bandwidth. When receiving, on downlink, control information for frequency hopping of the shared channel signal over different basic frequency blocks, the mobile terminal apparatus maps the shared channel signal in sub-carriers in the different basic frequency blocks in such a manner that frequency hopping is performed over the basic frequency blocks in accordance with the control information, and radio-transmits a transmission signal after mapping to a base station apparatus. | 10-06-2011 |
20110249657 | MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS - A mobile terminal apparatus and radio base station apparatus supporting each of a plurality of mobile communication systems when the plurality of mobile communication systems coexists, where the mobile terminal apparatus performs a cell search using an SCH signal included in one downlink CC among a plurality of downlink CCs, and where the radio base station apparatus broadcasts a DBCH signal including information of an uplink CC paired with an initial downlink CC including the SCH signal obtained by the cell search, and transmits a response signal of an RACH signal from the mobile terminal apparatus to the mobile terminal apparatus in the initial downlink CC, and where the mobile terminal apparatus transmits a shared channel signal including information of a transmission/reception bandwidth of the mobile terminal apparatus to the radio base station apparatus in the uplink CC, and where the radio base station apparatus transmits a control signal including assignment information of a downlink CC and an uplink CC based on the information of the transmission and reception bandwidth of the mobile terminal apparatus to the mobile terminal apparatus, and where the radio base station apparatus and the mobile terminal apparatus communicate with each other in the downlink CC and the uplink CC based on the assignment information after random access. | 10-13-2011 |
20110255469 | MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS - A mobile terminal apparatus and radio base station apparatus supporting each of a plurality of mobile communication systems when the plurality of mobile communication systems coexists is disclosed, wherein the mobile terminal apparatus is a mobile terminal apparatus in a radio communication system for performing transmission and reception in uplink and downlink, each assigned to a relatively wide system band obtained by aggregating a plurality of component carriers, each of which is a relatively narrow system band, and has coding and data modulation sections that perform coding and data modulation on uplink control signals including report information of individual component carriers assigned to downlink, and mapping sections that map the control signals subjected to coding and data modulation to uplink communication channels. | 10-20-2011 |
20110255493 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, MOBILE COMMUNICATION SYSTEM AND INFORMATION RETRANSMISSION METHOD - To suppress deterioration of retransmission efficiency and retransmit a transmission signal efficiently, provided are a base station apparatus which divides, in a retransmission block dividing section, a transmission signal into retransmission blocks according to a retransmission block table with which are registered the numbers of the retransmission blocks, each of the transmission blocks is a retransmission unit of a transmission signal, the numbers of the retransmission blocks are required numbers corresponding to the number of transmission antennas and the system bandwidth in case that the maximum value of the size of the retransmission block is fixed to a certain value, and retransmits in downlink transmission signals associated with the divided retransmission blocks, and a mobile terminal apparatus which receives the transmission signals associated with the retransmission blocks from the base station apparatus, and combines the retransmission blocks to restore the transmission signal prior to division. | 10-20-2011 |
20110256836 | RADIO BASE STATION APPARATUS AND MOBILE TERMINAL APPARATUS - The present invention provides a radio base station apparatus and a mobile terminal apparatus that can realize efficient reception control when a plurality of mobile communication systems coexist. The radio base station apparatus allocates a control signal of the mobile communication system having a relatively wide system band composed of component carriers to at least two component carriers in a decoding unit composed of a plurality of data blocks, the mobile terminal apparatus corresponding to the mobile communication system receives the control signal, the mobile terminal apparatus demodulates the control signal in a decoding unit composed of a plurality of data blocks and determines whether or not the control signal is directed to the mobile terminal apparatus. | 10-20-2011 |
20110261713 | MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS - There is provided a mobile terminal apparatus and a radio base station apparatus capable of transmitting a downlink signal using an optimum feedback parameter even when a control delay exists and improving throughput characteristics of a downlink channel. A mobile terminal apparatus (1) measures a feedback parameter for a radio base station apparatus (3) using a received signal, obtains a feedback value, predicts a feedback parameter after a control delay in which the feedback value is reflected on transmission of a downlink shared channel to obtain a feedback predicted value, transmits the feedback predicted value to the radio base station apparatus, and the radio base station apparatus (3) selects a precoding weight of MIMO channel transmission using the feedback predicted value and schedules the downlink shared channel using the feedback predicted value. | 10-27-2011 |
20110261771 | RADIO BASE STATION APPARATUS AND MOBILE TERMINAL APPARATUS - The present invention provides a radio base station apparatus and a mobile terminal apparatus compatible with respective mobile communication systems when a plurality of mobile communication systems coexist. The mobile terminal apparatus performs a cell search using a synchronization channel signal specific to a first mobile communication system made up of a plurality of component carriers multiplexed with at least one downlink component carrier in the first mobile communication system and/or a synchronization channel signal for a second mobile communication system having a relatively narrow second system band multiplexed with at least one downlink component carrier in the first mobile communication system. and makes random access using uplink/downlink component carriers allocated based on information of downlink component carriers including the synchronization channel signal used for the cell search and information of uplink component carriers included in a dynamic broadcast channel signal broadcast from the radio base station apparatus. | 10-27-2011 |
20110274142 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, MOBILE COMMUNICATION SYSTEM AND INFORMATION RETRANSMISSION METHOD - To suppress deterioration of retransmission efficiency and retransmit a transmission signal efficiently even when the system bandwidth is extended, provided are a base station apparatus ( | 11-10-2011 |
20110317745 | MOBILE COMMUNICATION SYSTEM, RADIO BASE STATION, AND MOBILE STATION - In a mobile communication system according to the present invention, a reference signal sequence includes a plurality of signal sequences assigned in slot units in the predetermined physical channel based on a hopping pattern and a sequence shift pattern; the hopping pattern is configured to be determined based on a slot number and an SFN in the predetermined physical channel or the predetermined physical signal; the sequence shift pattern is configured to be determined based on the identification information of the cell to which the predetermined physical channel or the predetermined physical signal has been set; and the hopping cycle is configured to be determined based on a cycle of the slot number and an SFN cycle. | 12-29-2011 |
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 |
20120002556 | USER EQUIPMENT TERMINAL, BASE STATION, AND CHANNEL QUALITY INFORMATION REPORT METHOD - A user equipment terminal for reporting channel quality information to a base station includes a channel quality information measuring unit configured to measure channel quality information; and a channel quality information generating unit configured to generate, as the channel quality information, a difference value between a first absolute value of the measured channel quality information and a second absolute value of previously measured channel quality information. The present invention also relates to a base station and a channel quality information report method. | 01-05-2012 |
20120002613 | MOBILE COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER APPARATUS AND METHOD - In a cell having a system bandwidth wide enough to allow a RACH from a UE and a PUSCH from another UE to be frequency-division multiplexed in the same subframe, a PUCCH unattached to the PDSCH and the RACH are frequency-division multiplexed in the same subframe. In a cell having a narrow system bandwidth, a PUCCH unattached to the PUSCH and the RACH are time-division multiplexed, and the RACH is transmitted for a period for a BCH or others not required to feed ACK/NACK back to a base station apparatus. Alternatively, the PUCCH unattached to the PUSCH and the RACH are frequency-division multiplexed, and the bandwidth for the RACH may be set to be narrower than the bandwidth scheduled for the RACH in a cell having a wider system bandwidth. | 01-05-2012 |
20120026960 | RADIO BASE STATION - A radio base station (eNB) is a radio base station that can simultaneously transmit a first downlink signal in which a transmission stream number is adaptively changed, and a second downlink signal in which a transmission stream number is fixed to 1, to a mobile station using an MIMO scheme, the radio base station including: a reception quality reception unit configured to receive information indicating reception quality of the first downlink signal transmitted by the mobile station; a reception quality adjustment unit configured to calculate an adjustment value of the information indicating the reception quality based on a stream number of the first downlink signal; and a processing unit configured to perform an adaptive modulation and demodulation process and a transmission power control process on the second downlink signal based on the calculated adjustment value. | 02-02-2012 |
20120033561 | COMMUNICATION CONTROL METHOD, MOBILE STATION AND BASE STATION - The disclosed mobile station includes: a CAZAC code generation unit configured to generate CAZAC code according to a CAZAC sequence number reported from the base station; a cyclic shift unit configured to cyclically shift each symbol of the CAZAC code based on a cyclic shift number reported from the base station, and a block spreading unit that operates with the cyclic shift unit or operates instead of the cyclic shift unit, and that performs block spreading processing for the CAZAC code according to a block spreading number reported from the base station. | 02-09-2012 |
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 |
20120039267 | BASE STATION APPARATUS, MOBILE TERMINAL 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 maps 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 mapped transmission data on downlink, and a mobile terminal apparatus which receives the transmission data mapped to the group bands and demaps the transmission data. | 02-16-2012 |
20120044916 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - Provided is a radio base station apparatus capable of transmitting a control signal efficiently even in radio communications using a system band that includes a plurality of component carriers. In the radio base station apparatus, control signals of transport blocks corresponding to the plural component carriers are coded jointly and the coded control signal is assigned to one or plural component carriers to be transmitted. A mobile terminal apparatus receives data from the radio base station apparatus, separates the control signal from the received data and decodes the separated control signal thereby to obtain control information of the transport blocks of the corresponding component carriers. | 02-23-2012 |
20120076089 | 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 with an uplink control channel signal, the radio communication method of the invention has, 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, performing joint-coding on the feedback control information for each component carrier, mapping the feedback control information coded by the joint-coding to subcarriers, and transmitting an uplink transmission signal mapped to the subcarriers. | 03-29-2012 |
20120082023 | CODE MULTIPLEXING TRANSMISSION METHOD, TRANSMISSION APPARATUS AND RECEPTION APPARATUS - To obtain a high frequency diversity effect while suppressing inter-code interference in code multiplexing transmission in an OFDM-based radio access scheme, a transmission apparatus is provided with an orthogonal spreading code generating section ( | 04-05-2012 |
20120106501 | RADIO BASE STATION APPARATUS, MOBILE STATION APPARATUS AND RADIO COMMUNICATION METHOD - To provide a radio base station apparatus and radio communication method capable of performing radio communications using downlink reference signal structures suitable for antenna virtualization, a radio base station apparatus ( | 05-03-2012 |
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 |
20130188596 | BASE STATION - A base station communicates with a user device transmitting an uplink signal based on a single-carrier transmission scheme. The base station includes a frequency hopping determining unit configured to determine whether to apply frequency hopping to the user device based on radio-wave propagation information from the user device and a traffic type of data to be transmitted by the user device; a scheduler configured to allocate frequencies to the user device based on uplink channel reception conditions of the user device; and a reporting unit configured to report allocation information indicating resource units allocated by the scheduler to the user device. When the frequency hopping determining unit determines to apply the frequency hopping to the user device, the scheduler allocates, to the user device, resource units with different frequency bands in different slots. | 07-25-2013 |
20130223413 | MOBILE STATION, BASE STATION, UPLINK TRANSMISSION METHOD, AND DOWNLINK TRANSMISSION METHOD - A mobile station includes a channel quality estimation unit configured to estimate downlink channel quality based on a reference signal from a base station and to output the estimated downlink channel quality as channel estimation information; an acknowledgement information determining unit configured to determine whether a downlink data channel from the base station is correctly received and to output the determination result as acknowledgement information; and an acknowledgement information prioritizing unit configured to cause the acknowledgement information to be preferentially transmitted to the base station if transmission timings of the channel estimation information and the acknowledgement information coincide. | 08-29-2013 |
20140056206 | 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. | 02-27-2014 |
20140378139 | RADIO BASE STATION APPARATUS AND MOBILE TERMINAL - To provide a radio base station apparatus and mobile terminal for enabling cell selection to be performed in a faster cell switching period in handover, the radio base station apparatus of the invention has a plurality of transmission/reception sections capable of being extended to remote sites, an FCS application determining section that determines whether to apply fast cell selection in handover based on information from the mobile terminal, and a multi-cell scheduling control section that controls transmission/non-transmission of the first and second transmission/reception sections when the FCS application determining section determines that FCS is applied. | 12-25-2014 |
20150085819 | RADIO BASE STATION APPARATUS, MOBILE STATION APPARATUS AND RADIO COMMUNICATION METHOD - To provide a radio base station apparatus and radio communication method capable of performing radio communications using downlink reference signal structures suitable for antenna virtualization, a radio base station apparatus ( | 03-26-2015 |