Patent application number | Description | Published |
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 |
20090185602 | TRANSMITTER, RECEIVER, AND MOBILE COMMUNICATION SYSTEM - A transmitter includes: spread code multiplying means that multiplies a symbol indicating a reference signal by spread code to generate a chip sequence after spreading; chip pattern generation means that generates a chip pattern by performing chip repetition a predetermined repetition number of times on the chip sequence after spreading; and multiplying means that multiplies a signal having the chip pattern by a phase specific to the transmitter. | 07-23-2009 |
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 |
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 |
20090290627 | CODE EVALUATOR, CODE EVALUATION METHOD, RADIO COMMUNICATION SYSTEM, BASE STATION AND MOBILE STATION - The present invention relates to a code evaluation method comprising the steps of computing an auto-correlation function from a generated code; computing an evaluation reference value for determining quality of the generated code based on the auto-correlation function and a weighting factor determined depending on the evaluation reference value; and determining the quality of the generated code based on the evaluation reference value. | 11-26-2009 |
20100046480 | USER APPARATUS, BASE STATION APPARATUS AND METHOD - A user apparatus generates an uplink control channel including at least one of acknowledgement information and channel condition information on an downlink, and transmits the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel. The uplink control channel includes multiple unit block sequences resulting from multiplication of the same factor with all chips of a CAZAC code sequence for the user apparatus. | 02-25-2010 |
20100091708 | BASE STATION APPARATUS, MOBILE STATION, RADIO COMMUNICATION SYSTEM, AND COMMUNICATION CONTROL METHOD - In a radio communication system including a mobile station and a base station apparatus for communicating with the mobile station according to a SC-FDMA scheme in uplink, the mobile station includes a transmitting unit configured to transmit at least one of a first signal and a second signal; and a Sounding RS transmitting unit configured to determine a transmission band for a Sounding Reference Signal (Sounding RS) based on mapping information of at least one of the first signal and the second signal. | 04-15-2010 |
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 |
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 |
20100189058 | BASE STATION APPARATUS, USER APPARATUS, AND METHOD OF ALLOCATING REFERENCE SIGNAL SEQUENCES - A base station apparatus is disclosed which communicates with a user apparatus which transmits an uplink signal using a single-carrier scheme. The base station includes a sequence-identifier determining unit which performs scheduling to allocate a frequency based on an uplink channel reception state of the user apparatus, and which determines a second sequence identifier for use by the user apparatus based on a first sequence identifier in a length of a reference signal sequence for transmitting in a maximum bandwidth in which the user apparatus can transmit, and a frequency bandwidth allocated to the user apparatus. | 07-29-2010 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
20110188585 | MOBILE COMMUNICATION SYSTEM, TRANSMISSION APPARATUS, RECEIVING APPARATUS AND METHOD - A transmission apparatus for transmitting an uplink control signal by using a predetermined number of basic frequency blocks in a plurality of basic frequency blocks, wherein a system band is divided into a plurality of bands by a basic frequency block having a predetermined bandwidth, includes: a mapping unit configured to map control information to subcarriers in a basic frequency block in a given subframe; an inverse Fourier transform unit configured to perform inverse Fourier transform on a signal to which the control information is mapped; and a radio transmission unit configured to transmit a transmission signal, to a receiving apparatus by radio, including a signal on which inverse Fourier transform has been performed. In a subframe subsequent to the given subframe, the mapping unit maps the control information to subcarriers in a basic frequency block of a band different from a band of the basic frequency block in the given subframe. | 08-04-2011 |
20110317640 | RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - A radio base station apparatus and radio communication method are provided whereby reception characteristics do not deteriorate even when the number of multiplexed users of an uplink control channel signal is increased. The radio communication method of the present invention includes a transmission step of a mobile terminal apparatus transmitting an uplink control channel signal orthogonally multiplexed among users including reference signals, a receiving step of the radio base station apparatus receiving the uplink control channel signal and a demodulation step of demodulating the uplink control channel signal using maximum likelihood detection. | 12-29-2011 |
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 |
20120069831 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, AND RADIO ACCESS METHOD - To provide a radio base station apparatus, a mobile terminal apparatus and a radio access method that support each of a plurality of mobile communication systems when the plurality of mobile communication systems coexists, the configuration is provided in which in transmission in a mobile communication system having a system band comprised of a plurality of component carriers, the transmission data is subjected to frequency hopping in a single component carrier in a subframe, while being subjected to frequency hopping over mutually different component carriers in prior and subsequent subframes. | 03-22-2012 |
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 |
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 |