Abstract: A terminal apparatus generates a transmission resource request message that includes identifier information for identifying a service or an application to which transmission data belongs, or frequency information indicating a frequency that is used for the service or the application to which the transmission data belongs, and notifies the base station apparatus of the generated transmission resource request message, in a case where the transmission data for the service or the application for any device-to-device data communication is prepared in a transmission buffer of the terminal apparatus itself.

Abstract: A method by a user equipment (UE) is described. The method includes determining a repetition level, determining a initialization value for a scrambling sequence generator based on the repetition level, generating the scrambling sequence, and applying the scrambling sequence for a Physical Downlink Shared Channel (PDSCH). The repetition level is associated with the PDSCH and determined by a Radio Resource Control (RRC) configuration.

Abstract: Provided is a wireless communication system in which a first base station apparatus and a second base station apparatus perform communication with a terminal device, in which the first base station apparatus transmits radio resource configuration information including radio bearer configuration information of the first base station apparatus or the second base station apparatus, to the terminal device, in which the terminal device receives the radio resource configuration information, in which, in a case where an RLC failure with respect to the first base station apparatus is detected, the terminal device executes a re-establishment procedure, and in which, in a case where an RLC failure with respect to the second base station apparatus is detected, the terminal device transmits to the first base station apparatus a message indicating that an RLC failure with respect to the second base station apparatus is detected, and suspends the radio bearer for the second base station apparatus.

Abstract: A terminal device that communicates with a different terminal device and an Evolved Universal Terrestiral Radio Access Network (EUTRAN) configures a mode 2 that is available for communication between terminal devices out of EUTRAN coverage and for communication between terminal devices in the EUTRAN coverage, as a mode for inter-terminal device communication, and, during a handover procedure, performs reception processing for communication between terminal devices in a mode 2.

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 terminal device is configured to monitor a radio link on the basis of a specific threshold value defined as a level of a downlink radio link and the threshold value is defined by taking into account the number of repetitive transmissions and/or repetitive receptions.

Abstract: A terminal device, a base station device, a communication system, a measurement method, and an integrated circuit, which are capable of efficiently performing Sidelink Direct Discovery, are provided.

Abstract: A terminal device, a base station device, a communication system, a measurement method, and an integrated circuit, which are capable of efficiently performing Sidelink Direct Discovery, are provided. In the terminal device, a reception unit is configured to receive an RRC connection reconfiguration message including a first configuration related to Sidelink Direct Discovery, and in a case where the first configuration includes frequency information, to attempt to acquire configuration information about monitoring of a Sidelink Direct Discovery announcement at a frequency indicated by the frequency information, using a timer configured to count a predetermined time and while the timer is counting, by acquiring system information to be broadcast at the frequency.

Abstract: Provided is a technology related to a terminal device, a base station device, a communication system, a measurement method and an integrated circuit that efficiently perform cell measurement. The base station device configures a primary cell and one or more secondary cells to the terminal device, and indicates a measurement object, a reporting configuration including information indicating a threshold associated with an RSSI report and a report interval, and a measurement identity for linking the reporting configuration and the measurement object, to the terminal device. When, in each configured measurement identity, an associated reporting configuration includes information indicating the threshold associated with the RSSI report and the report interval, the terminal device periodically reports an average value of RSSIs measured in a duration of the report interval, and a percentage of the RSSIs being beyond the threshold as a measurement result.

Abstract: A technology related to a terminal device, a base station device, a communication method, and an integrated circuit are provided for efficiently performing measurements. A base station device notifies a terminal device of a report configuration including information about an RSSI report, a measurement object indicating at least one frequency assumed as a frequency applicable for an RSSI measurement by the terminal device, and a measurement identifier for linking the report configuration to the measurement object. In a case where the information about the RSSI report is included in a report configuration associated with a measurement identifier, the terminal device assumes at least one frequency indicated by the measurement object associated with the report configuration as the frequency applicable for the RSSI measurement.

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: A measurement object of which a terminal device takes a measurement is selected based on information of whether or not the measurement object included in a measurement configuration message notified by a base station device includes a parameter for a gap configuration or for a cell identification time configuration for small-cell measurement, and receiving power of a cell in which the terminal device itself is present.

Abstract: A terminal device includes a transmitter that transmits a random access preamble, a higher layer processor that configures, based on a higher layer signal, a first identity corresponding to a first component carrier group and a second identity corresponding to a second component carrier group; a counter that, in a case that two or more component carriers are configured for an uplink, counts a number of transmission of the random access preamble; and a medium access control (MAC) layer processor that indicates a random access problem to an upper layer in a case that the number exceeds a maximum number of transmission of the random access preamble on a master component carrier of the first component carrier group or a master component carrier of the second component carrier group.

Abstract: Provided is a technology relating to a terminal device, a base station apparatus, a communication system, a communication method, and an integrated circuit, in all of which it is possible that a communication procedure relating to device-to-device communication is efficiently performed.

Abstract: An object of the invention is to provide a mobile station apparatus, a base station apparatus, a communication system, a mobile station apparatus capability notification method, and an integrated circuit, which enable uplink transmission timing support information of the mobile station apparatus to be effectively notified to the base station apparatus. The mobile station apparatus that is connected to the base station apparatus by aggregating a plurality of cells of which frequencies are different from each other transmits capability information in which information related to an uplink transmission timing supported by the mobile station apparatus is associated with the plurality of frequencies supported by the mobile station apparatus, to the base station apparatus.

Abstract: Provided is a wireless communication system in which a first base station apparatus and a second base station apparatus perform communication with a terminal device, in which the first base station apparatus transmits radio resource configuration information including radio bearer configuration information of the first base station apparatus or the second base station apparatus, to the terminal device, in which the terminal device receives the radio resource configuration information, in which, in a case where an RLC failure with respect to the first base station apparatus is detected, the terminal device executes a re-establishment procedure, and in which, in a case where an RLC failure with respect to the second base station apparatus is detected, the terminal device transmits to the first base station apparatus a message indicating that an RLC failure with respect to the second base station apparatus is detected, and suspends the radio bearer for the second base station apparatus.

Abstract: A mobile station apparatus that obtains, from the base station apparatus, frequency information for a one cell of the plurality of the cells and a parameter of a timer, where a state of the one cell is changed to deactivation state based on expiry of the timer.

Abstract: A terminal apparatus according to one aspect of the present invention constitutes and reports an amount-of-transmission-buffer report to be notified to a base station apparatus, based on first transmission data to the base station apparatus, which is prepared in a transmission buffer of the terminal apparatus itself, second transmission data for device-to-device data communication, and a priority level of each piece of transmission data.

Abstract: There are provided a technology associated with a terminal device, a base station apparatus, a communication system, a communication method, and an integrated circuit, in all of which efficient communication control is performed. A terminal device makes a connection to a base station apparatus using a first cell group and second cell group, and, in a case where the second cell group that includes at least one cell is changed based on an information element which is notified with a radio resource control message that is received from the base station apparatus, starts counting of an RRC timer relating to a random access procedure for the cell in the second cell group, and initiates the random access.

Abstract: Disclosed is a radio communication system in which a base station device and a terminal device communicate with each other, and the terminal device performs a random access procedure. The base station device notifies the terminal device of random access common configuration information including the number of repetitions for each level, information indicating a relationship between group information of random access preambles and the level, and the number of attempts of preamble transmission for each level. A MAC layer in the terminal device performs processing of increasing the level in a case that a first counter exceeds the number of attempts of transmission corresponding to the level.