Abstract: Wireless terminals, base stations, telecommunications systems, telecommunications methods, and integrated circuits whereby efficient selecting of network cells in which terminals are camped are made available. A base station includes an information element that relates to cell reselection, which indicates whether each neighboring cell is a coverage-enhancement cell, in system information on the cells that support coverage enhancement, and transmits the system information, and a terminal, in a case where a serving cell is a coverage-enhancement cell, performs, based on system information that relates to cell reselection, a cell-reselection using cell-reselection parameters that relate to the coverage-enhancement cells.

Abstract: Provided is a technique related to a terminal apparatus, a base station apparatus, a communication system, a control method, and an integrated circuit which perform cell measurements efficiently. In a case where a measurement event which sets frequencies of a plurality of serving cells as a measurement object is configured by measurement configuration, the terminal apparatus determines each of an evaluation object cell and a neighbor cell from the plurality of serving cells at a frequency of the measurement object based on the measurement configuration configured by the base station apparatus, and evaluates the measurement event by using a measurement result of the evaluation object cell.

Abstract: Wireless terminals, base stations, telecommunications systems, telecommunications methods, and integrated circuits whereby efficient selecting of network cells in which terminals are camped and made available. A base station transmits, respectively, first system information that relates to a cell-selection performed by conventional terminals, and second system information that relates to a cell-selection performed by terminals that support coverage enhancement, and a terminal considers cells to which the second system information is not transmitted as barred cells, and in a case where the second system information is transmitted, performs a cell-selection using cell-selection parameters that relate to coverage-enhancement cells.

Abstract: There is provided a wireless communication system in which a first base station apparatus and a second base station apparatus communicate with a terminal apparatus through a plurality of cells, in which the plurality of cells is grouped into a first group which includes one or more cells having a first uplink transmission timing and includes a first cell belonging to the first base station apparatus, a second group which includes one or more cells having a second uplink transmission timing and includes a second cell belonging to the second base station apparatus, and a third group which includes one or more third cells having a third uplink transmission timing and belong to the first base station apparatus or the second base station apparatus, and in which the first base station apparatus notifies the terminal apparatus of information related to the groups and information of the transmission timing timers and the terminal apparatus manages the groups based on the information related to the groups, and control

Abstract: In a wireless communication system, a terminal apparatus is capable of reporting, to a base station apparatus, information indicating a mobility state of the terminal apparatus. In a case where the terminal apparatus reports information (history information) to the base station apparatus as mobility state indicating information, the terminal apparatus notifies the base station apparatus of a radio resource control connection setup complete message containing information indicating the presence of the history information that is notified as the mobility state indicating information. The history information contains an identifier of a cell that the terminal apparatus visited and the duration of stay in the cell. The base station apparatus notifies the terminal apparatus of information as to whether to report the mobility state indicating information.

Abstract: In a system including at least one base station device, the base station device efficiently controls uplink signals. A mobile station device includes a path loss calculation unit 4051 configured to calculate path losses, each based on one of a plurality of types of reference signals received by a reception processing unit 401, a transmit power setting unit 4053 configured to set a desired transmit power for an uplink signal using the path losses calculated by the path loss calculation unit 4051, and a power headroom control unit 4055 configured to generate a power headroom using the desired transmit power set by the transmit power setting unit 4053, the power headroom being information concerning transmit power to spare, and configured to control transmission of the power headroom.

Abstract: Provided is a technique related to a terminal apparatus, a base station apparatus, a communication system, a control method, and an integrated circuit, which efficiently controls a state of a cell for a plurality of cells. In the terminal apparatus using a plurality of cells, configuration information which disables change in a state of a cell is received from the base station apparatus, and control is performed based on the received configuration information so that a state of a part of cells among the plurality of cells is not changed.

Abstract: A wireless communication system includes a first base station apparatus and a second base station apparatus, and a terminal apparatus, each of the first base station apparatus and the second base station apparatus communicating with the terminal apparatus via a plurality of cells. The first base station apparatus notifies the second base station apparatus of a message that indicates a connection change request to change a connection destination of the terminal apparatus from the second base station apparatus to a third base station apparatus. Upon receiving the message indicating the connection change request, the second base station apparatus notifies the third base station apparatus of a connection request to connect the third base station apparatus to the terminal apparatus.

Abstract: A terminal device that uses a first serving cell group including a primary cell has a higher layer control information acquisition unit that configures a second serving cell group not including the primary cell, a channel state information generation unit that calculates respective pieces of periodic channel state information of serving cells, an uplink control information generation unit that generates uplink control information by dropping reports of the periodic channel state information other than one thereof in a case where the reports of plural serving cells in the first serving cell group collide with each other in one subframe and by dropping the reports of the periodic channel state information other than one thereof in a case where the reports of plural serving cells in the second serving cell group collide with each other in one subframe, and an uplink control information transmission unit that transmits an uplink subframe including the uplink control information.

Abstract: Provided is a technique related to a terminal apparatus, a base station apparatus, a communication system, a control method, and an integrated circuit which realize procedure of efficiently controlling a state of a cell for a plurality of cells. The terminal apparatus using a plurality of cells divides the plurality of cells into groups based on group identification information transmitted from the base station apparatus, receives control information indicating a change of a cell state of at least one of the cells, and controls the state of the cell based on bit map information and the group identification information, which are included in the control information and indicate the cell the state of which is to be changed.

Abstract: A wireless communication system according to an aspect of the present invention is a wireless communication system in which a first base station apparatus and a second base station apparatus communicate with a terminal apparatus, in which the first base station apparatus and/or the second base station apparatus notify the terminal apparatus of data control information related to data transmission and reception of the terminal apparatus and timer information used for notification of a buffer status report, and the terminal apparatus notifies any one of the first base station apparatus and the second base station apparatus of the buffer status report of uplink data based on the data control information in a case where the notification of the buffer status report is triggered.

Abstract: A mobile station (MS) performs a measurement of cells on a plurality of downlink frequencies used for a connection with a base station apparatus. The MS also detects a first indication or a second indication, based on the measurement of each cell designated by the base station apparatus, the first indication indicating a measurement result of a cell becomes lower than a first threshold and the second indication indicating a measurement result of a cell becomes higher than a second threshold. In addition, the MS, in a case where a reconnection procedure is started by expiring a timer corresponding to the each cell, selects a cell, and initiates a random access procedure for requesting a reconnection in the selected cell. Further, the timer is started if the first indication is indicated consecutively for a certain number of times.

Abstract: A mobile station device that communicates with a base station device. The mobile communication receives, from the base station device, a control signal for permitting the mobile station device to perform monitoring neighboring cell. The mobile station device also generates a gap based on one length of plural lengths, the gap being used in the monitoring, the one length corresponding to a measurement type of a neighboring cell according to a predetermined rule, the plural lengths being common with the base station, and the predetermine rule being common with the base station.

Abstract: A mobile station apparatus performs an efficient random access procedure. A base station apparatus includes all parameters of random access information in setting information regarding at least one of a plurality of cells and part of the parameters of the random access information in setting information regarding at least one of the plurality of cells and transmits the setting information to the mobile station apparatus. The mobile station apparatus executes the random access procedure for the cells for which the random access information is included in the transmitted setting information.

Abstract: Provided is a terminal apparatus which performs communication with a base station apparatus. The terminal apparatus includes: a receiving unit which receives a plurality of channel state information reference signals; a channel state information generating unit which generates a plurality of channel state information by referring to each of the plurality of channel state information reference signals; and a report transmitting unit which reports each of the plurality of channel state information to the base station apparatus.

Abstract: In a mobile station that performs communication with a base station device via a plurality of cells, the plurality of cells are grouped into a first group constituted by cells having an uplink transmission timing that is the same as that of one primary cell and a second group constituted by one or more cells having an uplink transmission timing that is different from that of the primary cell. The uplink transmission timings are each managed using a corresponding transmission timing timer for each of the groups. In a case where a transmission timing timer for the first group has expired, the mobile station stops all uplink transmissions in the plurality of cells. In a case where a transmission timing timer for the second group has expired, the mobile station stops uplink transmissions in the cells constituting the second group for which the transmission timing timer has expired.

Abstract: A terminal device sets a first UL-DL configuration, sets a subframe for monitoring a physical downlink control channel accompanied with information indicating a second UL-DL configuration, monitors the physical control channel accompanied with information indicating the second UL-DL configuration in the set subframe during an active time based on a first subframe set as a downlink subframe or a subframe including a DwPTS based on the first UL-DL configuration, and monitors a physical downlink control channel accompanied with a C-RNTI in a second subframe set as a downlink subframe or a subframe including the DwPTS based on the second UL-DL configuration during the active time.

Abstract: There is provided a radio communication system in which a first base station device and a second base station device communicate with a terminal device. The terminal device transmits report information corresponding to data transmission of each of the base station devices, to the first base station device and the second base station device. The terminal device transmits report information corresponding to data transmission of the second base station device to the first base station device in a case where occurrence of a problem is detected in a radio link between the second base station device and the terminal device. The first base station device detects occurrence of a problem in the radio link between the second base station device and the terminal device in a case where the report information corresponding to the second base station device is received from the terminal device.

Abstract: A communication system includes a terminal apparatus and a base station apparatus. The terminal apparatus communicates with a base station apparatus by carrier aggregation using a plurality of serving cells, where each of the plurality of serving cells has a different frequency. In addition, the terminal apparatus removes a measurement identity relevant to a serving cell of the plurality of serving cells based on that the serving cell was removed.

Abstract: A communication system that includes a terminal apparatus and a base station apparatus. The terminal apparatus obtains, from the base station apparatus, information regarding addition of a component carrier, whereby the information regarding addition of the component carrier comprises information related to carrier frequency of the component carrier and information related to system bandwidth of the component carrier. The base station apparatus provides, to the terminal apparatus, information regarding addition of a component carrier, whereby the information regarding addition of the component carrier comprises information related to carrier frequency of the component carrier and information related to system bandwidth of the component carrier.