Abstract: A radio base station receives a handover message from a network related to a handover of a terminal and determines the number of handover failures based on a number of the handover failures based on the handover message. The radio base station releases the terminal when the number of failures reaches a predetermined number.

Abstract: A network node that is a second network node connected to a user device and a first network node includes: a control unit that acquires information regarding a layer which is terminated at the user device and the second network node; and a transmission unit that transmits the information regarding the layer to the first network node. The layer is not terminated at the user device and the first network node.

Abstract: In a radio communication system, a split bearer that passes from a core network to a secondary cell group and branches from gNB 100B included in the secondary cell group to eNB 100A included in a master cell group is set, and data is transmitted to a user equipment via thus set split bearer. The gNB 100B transmits, to the eNB 100A, Use of SCG Radio Resource that indicates whether to configure a split bearer that uses a radio resource between the user equipment and the gNB 100B. The eNB 100A sets the split bearer based on the received Use of SCG Radio Resource.

Abstract: In one aspect of the present invention, a first base station for communicating with user equipment together with a second base station according to dual connectivity includes a data storage unit configured to store data to be transmitted from the first base station to the user equipment; a reception unit configured to receive from the second base station information indicating whether data to be transmitted from the second base station to the user equipment exist; and a state control unit configured to, when information indicating that data to be transmitted from the second base station to the user equipment exist is received, prevent the user equipment from releasing a radio resource or transitioning to a discontinuous reception state, even if the amount of to-be-transmitted data stored in the data storage unit is less than or equal to a predetermined threshold.

Abstract: A base station includes a first unit that performs radio transmission of a signal to a terminal, a second unit, and an interface that connects the first unit to the second unit. In order to determine which of the first unit and the second unit is a unit that performs precoding, information indicating whether or not at least one of the first unit and the second unit has a function of the precoding is sent over the interface.

Abstract: A communication device constitutes a management node that manages at least one of a first base station and a second base station provided on fronthaul. The communication device includes an acquisition unit that acquires a delay profile of the second base station, a control unit that determines a window parameter used to specify at least one of a Reception window and a Transmission window used in the first base station based on the delay profile of the second base station and a delay parameter defined by the fronthaul, and a notification unit that notifies the first base station of the window parameter.

Abstract: A central unit (210) holds a plurality of parameters for controlling radio communication. A distributed unit (260) also holds a plurality of parameters for controlling the radio communication. A radio base station manages the parameters to be held by the central unit (210) and the distributed unit (260). The radio base station causes a coordination necessary parameter, which is a parameter for which a coordination is necessary between the plurality of the parameters, to be held in only one of the central unit (210) and the distributed unit (260).

Abstract: CN (200) acquires from UE (50) UE Capability ID of UE Capability that indicates capability of the UE (50), and manages the UE Capability and the UE Capability ID by associating them with each other. The CN (200) transmits to gNB (100) Initial Context Setup Request as an instruction to acquire the UE Capability based on the acquired UE Capability ID and the UE Capability managed by the CN (200).

Abstract: One object is to provide a radio base station and a communication control method that can realize appropriate control on a user device even when a function of an upper layer such as MAC scheduler and a function of a radio physical layer are mounted separately. A communication control method according to the present invention is implemented in a radio base station (200) including a remote device (260) and a central aggregation device (210) and that performs radio communication with a user device (300). The communication control method includes transmitting including the central aggregation device (210) transmitting to the remote device (260) paging information that is information used for performing paging on the user device (300), and performing including the remote device (260) setting a downlink physical channel based on the paging information received from the central aggregation device (210) and performing the paging.

Abstract: An O-RAN distributed unit (O-DU) receives, from an intermediate device provided on a fronthaul, processing time information indicating a processing time in the intermediate device. The O-DU decides capability information set for the intermediate device based on at least the processing time information and transmits the decided capability information to the intermediate device.

Abstract: An eNB (100A) performs dual connectivity with a UE (200). The eNB (100A) receives a report that the UE (200) has from the UE (200) during the dual connectivity, and transmits, to the UE (200), a message including designation information that designates at least one of a first radio access technology or a second radio access technology as a transmission target of the report.

Abstract: A user equipment is disclosed including a receiver that receives an RRC message related to configuration information of a second radio base station for a split hearer that splits from the second radio base station toward a first radio base station, and a processor that releases resources related to a radio link of the second radio base station based on the RRC message when a radio link failure in the second radio base station is detected.

Abstract: Disclosed is a second base station device communicating with a first base station device. The second base station device includes a receiver configured to receive, from the first base station device, information for limiting radio resource allocation; a controller configured to allocate a radio resource based on the received information for limiting radio resource allocation; and a transmitter configured to transmit information for limiting radio resource allocation to the first base station device. The information for limiting radio resource allocation includes information indicating at least one of a frequency domain and a time domain indicating a location of a radio resource.

Abstract: Upon receiving, from UE (200), SCG Failure Information that indicates that a radio link failure has occurred in a secondary cell group, eNB (100A) transmits, to gNB (100B), Secondary Node Modification Request to instruct to release a resource of a split bearer of only a predetermined layer and the layers below thereof in the secondary cell group. Based on the received Secondary Node Modification Request, the gNB (100B) releases the resource of the split bearer below the predetermined layer in the secondary cell group. The eNB (100A) deletes setting itself of the secondary cell group when a bearer belonging to the secondary cell group other than the split bearer is not set.

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: 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 device is disclosed that is used as a first device in a radio communication system including the first device, a second device communicating with the first device, and a user equipment communicating with the first device. The device includes a processor being configured to acquire from the second device, a plurality of parameters used for an initial cell setting, the plurality of parameters including at least one of: information indicating a center frequency, a bandwidth and a duplex mode of a cell, a physical cell ID, information related to a master information block (MIB) for the initial cell setting, information related to a system information block (SIB) for the initial cell setting, and maximum transmission power. Additionally, the first device is a remote radio unit and the second device is a central unit. Further, the first device performs a predetermined layer function. In another aspect, a method is disclosed.

Abstract: Provided is a communication system that can sustain a reduction in delay in FFT/IFFT processing by code blocking user data, even in a case where the functions of upper layers such as a MAC scheduler and the function of the radio physical layer are implemented separately. In a radio base station (communication system) including a central aggregation device 210 and a remote device 220, the central aggregation device 210 transmits code blocks in a number necessary for generating an OFDM symbol as a piece of data to the remote device 220, the code blocks being produced by dividing user data into units of encoding processing.

Abstract: User equipment of a radio communication system including a base station that performs communication using a maximum bandwidth which is a largest bandwidth available for communication and the user equipment in which a largest bandwidth available for communication is equal to or less than the maximum bandwidth, the user equipment including a receiver unit configured to receive a radio signal transmitted from the base station; and an acquisition unit configured to acquire a radio resource of a master information block corresponding to a synchronization signal, a radio resource of a system information block, and a radio resource of a paging channel, wherein the receiver unit monitors the radio resource of the synchronization signal, the radio resource of the master information block, the radio resource of the system information block, or the radio resource of the paging channel, when the user equipment is in an RRC idle mode.

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.