Abstract: Techniques for allowing a base station indicating reconfiguration for user equipment to detect whether an RA procedure performed in response to the reconfiguration indication is successful or unsuccessful. A user equipment with dual connectivity functionality communicates with a master base station and a secondary base station simultaneously, and includes a transmission and reception unit that transmits and receives radio signals to/from the master and secondary base stations; an RA processing unit that performs a random access (RA) procedure; and a timer management unit that activates a timer upon detecting an RA procedure activation event for triggering activation of the RA procedure for the secondary base station. If the RA procedure performed in response to detection of the RA procedure activation event has not been completed before expiration of the timer, the timer management unit indicates that the triggering base station that the RA procedure has not been completed.

Abstract: A base station is provided. The base station includes a first reception unit configured to receive, from a user apparatus included in a mobile communication system including the base station, another base station communicating with the base station, and the user apparatus communicating with the base station, first data including quality information used for scheduling controlling performed by the other base station, and second data different from the first data. The base station also includes a transmission unit configured to transmit the first data to the other base station by giving higher priority to the first data than to the second data.

Abstract: A user equipment in a wireless communication system that includes a base station and the user equipment, the user equipment includes: a reception unit that receives allocations of radio resources to be used for transmitting uplink reference signals from the base station; a measurement unit that measures reception quality of downlink signals transmitted from the base station; and a transmission unit that starts transmitting uplink reference signals using the radio resources allocated from the base station when the reception quality measured by the measurement unit satisfies a predetermined condition and stops transmission of uplink reference signals when the reception quality measured by the measurement unit does not satisfy the predetermined condition.

Abstract: Provided is a radio communication system capable of implementing a state transition related to an intermediate transition between a connected state and an idle state.

Abstract: A user device that communicates with a network apparatus and in which at least one application is installed. The user device includes a receiver that receives, from the network apparatus, restriction information including a destination identifier for identifying an external network connected to the network apparatus and a barring rate associated with the destination identifier, and a controller that when communication is to be started by the application, controls whether to allow or prevent the communication by the application based on the restriction information.

Abstract: Provided is a scheme of generating an end marker for a data flow in flow-based handover transfer control. An aspect of the present invention relates to a core network which includes a flow control unit that switches a path of a data flow having a flow identifier and a flow priority from a first base station to a second base station and an end marker generating unit that generates an end marker of a data flow transferred from the first base station to the second base station via a tunnel in accordance with a generation rule based on one or more of the flow identifier, the flow priority, and the tunnel.

Abstract: A radio communication system that includes a user equipment; a base station; a first management apparatus that manages the user equipment according to a first RAT; and a second management apparatus that manages the user equipment according to a second RAT is disclosed. The base station includes a controller that controls radio communication with the user equipment and a transmitter that transmits first location registration information of the first management apparatus and second location registration information of the second management apparatus. The user equipment includes a receiver that receives the first location registration information and the second location registration information from the base station, a manager that retains location registration information, and a processor that determines the location registration in the first or second management apparatus is necessary and that performs the location registration in accordance with the determination.

Abstract: A mobile station UE enables scheduling with the congestion status of each component carrier taken into consideration when performing inter-eNB CA using a cell under a radio base station eNB#1 and a cell under a radio base station eNB#2. The mobile station UE includes a transmitter 12 configured to transmit the congestion status in the radio base station eNB#2 to the radio base station eNB#1.

Abstract: Techniques are disclosed for implementing efficient transmission of uplink packets when the uplink transmission direction is changed in a split bearer.

Abstract: A user equipment that communicates with a base station in a mobile communication system includes: a receiving unit that receives a change message of system information from the base station; and a control unit that requests the base station to transmit the system information when the receiving unit has received the change message and then has not received the system information.

Abstract: Disclosed is a radio communication system capable of implementing a state transition related to an intermediate state between a connected state and an idle state. An aspect of the present invention relates to a user equipment, wherein the user equipment includes a state management unit that manages a communication state of the user equipment, and a state transition unit that causes the communication state of the user equipment to transition, and when the user equipment is communicating with the first base station, if cell reselection for the second base station is performed, the state transition unit performs the cell reselection for the second base station while the state management unit retains first radio parameter information for radio communication between the user equipment and the first base station and a first context identifier specifying the first radio parameter information.

Abstract: An object is to provide a mobile station, a mobile communication system, and a network device that can realize more appropriate call origination control per service as intended by an operator. An MMTEL function unit (120) of a UE (100), based on ssac-BarringForMMTEL-Voice, upon determining that call origination of a VoLTE call is possible, transmits Bearer Request to an NAS function unit (170). The NAS function unit (170), in accordance with the Bearer Request, transmits Service Request to an RRC function unit (190). The RRC function unit (190), in accordance with the Service Request, based on ac-BarringForMO-Data or Tbarring, transmits RRC Connection Request to a mobile communication network (200) without determining a possibility of call origination of the VoLTE call.

Abstract: Provided is a technique for achieving simultaneous communication with a plurality of wireless communication systems using different radio access techniques. An aspect of the invention relates to a user equipment that supports simultaneous communication with a first wireless communication system and a second wireless communication system using different radio access techniques. The user equipment includes a transmitting and receiving unit that transmits and receives radio signals to and from a first base station in the first wireless communication system and a second base station in the second wireless communication system and a capability information notification unit that transmits, to the first base station or the second base station, capability information related to the simultaneous communication with the first wireless communication system and the second wireless communication system.

Abstract: The present invention is designed so that adequate communication is allowed even when system information is changed. The present invention provides a receiving section that receives a DL signal, which includes information that orders a modification of system information, and a control section that controls the modification of the system information based on the DL signal, and, when information related to content of the modification of the system information is included in the information ordering the modification, the control section changes a part or all of the system information based on the information related to the content of the modification. Also, in the modification order information, information to indicate that the system information is not changed and information to indicate the content of the modification when the system information is changed are defined as different pieces of bit information in the same bit field.

Abstract: Provided are a radio communication system and user device that enable smooth interworking in a radio resource control (RRC) layer in the case of implementing interworking between systems by LTE assisted 5G, 5G assisted LTE, or the like. The radio communication system includes an eNB 100 conforming to LTE and a 5G-BS 200 conforming to 5G. The eNB 100 includes an RRC function unit 110 that performs control based on LTE-RRC, which is an RRC protocol in LTE. The 5G-BS 200 includes an RRC function unit 210 that performs control based on 5G-RRC, which is the RRC protocol in 5G. The RRC function unit 210 has at least a function not specified in LTE-RRC.

Abstract: There is provided user equipment for communicating with a first base station and a second base station, the user equipment including a receiver that receives, form the first base station or the second base station with which an RRC connection is established, a first message indicating to establish a split bearer between the first base station and the second base station; and a communicator that establishes the split bearer between the first base station and the second base station that are reported by the first message, wherein, in the split bearer, a process of a PDCP layer is performed by one of the first base station and the second base station.

Abstract: The communication control method includes transmitting including a central aggregation device (210) of a radio base station transmitting to a remote device (260) system information (SIB) that is notified to a user device (300) and assignment information indicating radio resource assignment used for notifying the system information, and transmitting including the remote device (260) transmitting the system information to the user device (300) via a predetermined downlink channel based on received assignment information. The transmitting the assignment information to the remote device (260) includes, when the contents of the system information or the assignment information is changed, transmitting the contents changed system information or the contents changed assignment information.

Abstract: Provided is a base station used as a first base station in a radio communication system including the first base station, a second base station communicating with the first base station, and a user equipment communicating with the first base station. The base station includes: an acquiring unit that acquires a plurality of parameters used for an initial cell setting; and a setting unit that performs a cell setting using the acquired plurality of parameters.

Abstract: An adequate transmission rate is guaranteed in a case where “Inter-node UP aggregation” is being performed. In a mobile station according to the present invention, each of MAC layer functions includes a cost management unit configured to manage a cost of an LCH involved in “Inter-node UP aggregation”, a priority management unit configured to manage a priority of the LCH, and a bearer management unit configured to allocate transmission resources to data for the LCH based on the priority and the cost of the LCH. The cost management unit is configured to update the cost of the LCH managed by the cost management unit itself, based on a PBR value informed by a network.

Abstract: A user device communicating with a base station includes a determiner that determines whether the user device is set at low access priority and whether data to be transmitted to the base station is high-priority data, and a transmitter that transmits an RRC message to the base station. When the user device is set at low access priority and the data to be transmitted to the base station is the high-priority data, the determiner reports, to the transmitter, information indicating transmission of the high-priority data, and the transmitter sets the information indicating the transmission of the high-priority data in the RRC message, and transmits the RRC message to the base station.