Abstract: A user equipment has a transmission and reception unit configured to transmit and receive a radio channel to/from a base station via multiple cells configured by carrier aggregation, a simultaneous transmission availability determination unit configured to, in response to an occurrence of an event to transmit an uplink control channel in the multiple cells simultaneously, determine whether the uplink control channel can be simultaneously transmitted in the multiple cells, and a transmission control unit configured to, if the uplink control channel can be simultaneously transmitted in the multiple cells, instruct the transmission and reception unit to transmit the uplink control channel in the multiple cells simultaneously, and if the uplink control channel cannot be simultaneously transmitted in the multiple cells, control transmission of the uplink control channel in accordance with a transmission priority.

Abstract: A user apparatus in a mobile communication system in which carrier aggregation is performed using a plurality of cells is disclosed. The user apparatus includes a processor that determines whether a physical uplink shared channel (PUSCH) is set in the user apparatus at a transmission timing of uplink control information, and determines to transmit the uplink control information by using the PUSCH when the PUSCH is set. The user apparatus also includes a transmitter that transmits the uplink control information to a radio base station using the PUSCH. The processor determines, when a PUSCH is set in a first cell in the plurality of cells, to transmit the uplink control information using the PUSCH. When no PUSCH is set in the first cell, the processor determines to transmit the uplink control information using a PUSCH in a second cell.

Abstract: To ensure stable operation of a user terminal even in the case where the user terminal is instructed to transmit uplink signals at different transmission timings with a plurality of component carriers, in a radio communication system provided with a radio base station apparatus that indicates transmission timings of uplink signals for each component carrier, and a user terminal that transmits an uplink signal at a transmission timing set based on transmission timing information indicated from the radio base station apparatus and the like, it is a feature that the radio base station apparatus indicates different transmission timing information in a plurality of component carriers, and that the user terminal avoids simultaneous transmission of uplink signals in the case of performing communications using a plurality of contiguous component carriers.

Abstract: The present invention aims to reduce an insertion loss or the like caused by a diplexer inserted to reduce leakage from an uplink bandwidth to a downlink bandwidth of different bands, and thereby to improve a communication quality. A mobile communication method according to the present invention includes the steps of: transmitting simultaneous transmission capability information from a mobile station UE to a radio base station eNB, the simultaneous transmission capability information indicating whether or not the mobile station UE is able to transmit uplink data signal via multiple carriers in multiple bands within a same sub-frame in performing uplink CA; performing scheduling for the mobile station UE by the radio base station eNB based on the simultaneous transmission capability information; and performing communications by the mobile station UE based on the scheduling information.

Abstract: In one aspect of the present invention, a mobile station includes a receiver type control signal reception unit configured to receive a receiver type control signal indicating whether to allow an operation of a receiver in association with at least one receiver type; and a receiver configuration unit configured to configure the operation of the receiver based on the received receiver type control signal.

Abstract: A mobile communication method and a mobile station appropriately use equivalent band indicators. The mobile communication method includes: a step of broadcasting, by a radio base station BS, a band indicator indicating a band 19 and an equivalent band indicator indicating bands 5 and B26 overlapping the band 19; and a step of performing, by a mobile station UE, an connection process in a band 5 or B26 when the mobile station is not compatible with the band 19 indicated by the received first band indicator and is compatible with the band 5 or B26 indicated by the received equivalent band indicator.

Abstract: A mobile station for communication using carrier aggregation includes a secondary cell state management unit configured to manage whether a state of a secondary cell is an activation state or a deactivation state; and a transmission control unit configured to stop transmission of uplink control information on a physical uplink control channel in a first secondary cell, when the state of the first secondary cell managed by the secondary cell state management unit is the deactivation state at a timing of transmission of the physical uplink control channel in the first secondary cell.

Abstract: An objective is to improve communication quality by reducing an insertion loss or the like of a diplexer inserted to reduce a leakage from an uplink band to a downlink band in different bands. A mobile communication method according to the present invention includes the steps of: transmitting simultaneous transmission capability information from a mobile station UE to a radio base station eNB, the simultaneous transmission capability information indicating whether or not the mobile station UE can transmit uplink data signals via multiple carriers in the same sub-frame while performing uplink CA; performing scheduling for the mobile station UE by the radio base station eNB on the basis of the simultaneous transmission capability information; and performing communication by the mobile station UE on the basis of the scheduling information.

Abstract: To prevent the occurrence of interference in the uplink when carrying out “Time-Switched UL CA”. A mobile station UE according to the present invention includes a UL transmission processing unit 11 configured to transmit uplink information at TTI# n+4 corresponding to TTI#n, using a CC allocated over a PDCCH to the mobile station UE at TTI# n by the radio base station eNB. The UL transmission processing unit 11 is configured to transmit the uplink information at each of TTIs using only one CC, and when TTI# n+4 is included in a “switching period” in which a CC used for the transmission of the uplink information is switched, the UL transmission processing unit 11 is configured not to transmit the uplink information at the TTI# n+4.

Abstract: A user apparatus in a mobile communication system supporting carrier aggregation includes a measurement unit configured to measure an rs-sinr (reference signal-signal to interference and noise ratio) for a reference signal in a physical downlink control channel transmitted from a base station; and a reporting unit configured to report the measured rs-sinr to the base station in accordance with a predefined reporting trigger.

Abstract: A user apparatus in a mobile communication system supporting carrier aggregation includes a measurement unit configured to measure a reception timing difference between component carriers; an information notification unit configured to notify the base station of information on the reception timing difference measured by the measurement unit; and a control unit configured to perform addition or deletion of a secondary cell in the carrier aggregation based on an instruction from the base station that receives the information.

Abstract: A user apparatus that is used in a radio communication system including a plurality of base stations, and that includes a function for performing interference reduction based on user assignment in an interference cell, including: interference pattern generation means that generates a plurality of interference patterns each of which is a combination of presence or absence of an interference signal in a given number of interference cells for the user apparatus; reception quality calculation means that calculates a reception quality after interference reduction for each of the plurality of interference patterns generated by the interference pattern generation means; and user assignment information estimation means that determines presence or absence of an interference signal in each interference cell corresponding to an interference pattern based on which the best reception quality is obtained in reception qualities calculated by the reception quality calculation means to be presence or absence of user assignmen

Abstract: The present invention is designed to allow adequate communication even when a plurality of cells employ downlink transmission power control. A user terminal communicates with a radio base station that executes downlink transmission power control, and includes a receiving section that receives a first reference signal which is transmitted with fixed transmission power, and a second reference signal to which the downlink transmission power control is applied, a measurement section that measures the received power of the first reference signal and the second reference signal, and a transmission section that feeds back information related to the received power of the first reference signal and the second reference signal as a measurement report.

Abstract: The present invention is designed to provide a radio communication terminal, a base station apparatus, a radio communication system and a radio communication method which can reduce the cost to be required for an MTC terminal when the LTE system is employed in the network domain of a machine communication system.

Abstract: A mobile station UE according to the present invention includes a controller unit 22. When “1” is set in “R” in the “Activation/Deactivation MAC Control Element”, the controller unit 22 activates only an uplink in a Scell corresponding to “Ci” set to “1”, and deactivates only the uplink in a Scell corresponding to “Ci” set to “0”.

Abstract: Even equipped with “Advanced Receiver functionality”, a mobile station UE according to the present invention achieves appropriate battery saving. The mobile station UE according to the present invention includes: a determination unit 11 configured to determine whether or not there is a possibility of allocation of any of resource for uplink data and resource for downlink data to the mobile station UE; and a switch unit 12 configured to halt the “Advanced Receiver functionality” when the determination unit 11 determines that there is no possibility of the allocation.

Abstract: One objective of the present invention is to determine an allowed range of transmission power in relaxation of the transmission power of a user equipment.

Abstract: Appropriate “idle mode cell reselection” is achieved by changing a threshold used to perform “idle mode cell reselection” between a case of performing RSRQ measurement in six resource blocks and a case of performing “Wideband RSRQ measurement.” A mobile communication method according to the present invention includes a step of causing a radio base station eNB or a radio network controller RNC to broadcast not only existing parameters used to perform cell reselection processing based on a result of the RSRQ measurement in six resource blocks, but also wideband parameters used to perform “idle mode cell reselection” based on a measurement result of “Wideband RSRQ measurement.

Abstract: A user apparatus that is used in a radio communication system including a plurality of base stations, and that includes a function for performing interference reduction based on user assignment in an interference cell, including: interference pattern generation means that generates a plurality of interference patterns each of which is a combination of presence or absence of an interference signal in a given number of interference cells for the user apparatus; reception quality calculation means that calculates a reception quality after interference reduction for each of the plurality of interference patterns generated by the interference pattern generation means; and user assignment information estimation means that determines presence or absence of an interference signal in each interference cell corresponding to an interference pattern based on which the best reception quality is obtained in reception qualities calculated by the reception quality calculation means to be presence or absence of user assignmen

Abstract: A terminal apparatus that performs radio communication with a base station apparatus in a mobile communication system, including: a transmission mode information receiving unit configured to receive transmission mode information, from the base station apparatus, corresponding to a transmission mode that should be set in the terminal apparatus; a transmission mode setting unit configured to set the terminal apparatus to the transmission mode if the terminal apparatus can perform radio transmission in the transmission mode corresponding to the transmission mode information received by the transmission mode receiving unit; and a radio transmission unit configured to perform radio transmission in the transmission mode.