Ntt Docomo, Inc.

Teruaki Toeda

Tooru Uchino

Anil Umesh

Kenji Kai

Tianyang Min

Hideaki Takahashi

Akihito Hanaki

Hiroshi Ou

Wuri Andarmawanti Hapsari

Yousuke Sano

Hiromasa Umeda

Naoya Murata

Makoto Miyagoshi

A network node is a first network node of a communication system including a user device and a plurality of network nodes, the network node including a reception unit that receives an inter-node message relating to a configuration of the user device from a second network node; a determination unit that determines whether a manner of updating the configuration of the user device is a full configuration or a delta configuration based on the inter-node message; and an updating unit that updates the configuration of the user device with the full configuration or the delta configuration based on the determination.

Network node

A network node includes a receiving unit that receives information related to a protocol version of a message of a higher layer and a control unit that uses a same protocol version for a plurality of higher network nodes that terminate and split the higher layer, based on the information related to the protocol version, in which the network node is one of the plurality of higher network nodes.

Network node, system, and method for interface establishment management

A radio base station is disclosed including a first communication device that supports a cell; and a second communication device that is connected to the first communication device and controls the first communication device, wherein the second communication device transmits system information including a reference system frame number and a reference time associated with the reference system frame number to the first communication device, and the first communication device broadcasts the system information. In other aspects, a radio communication method and a radio communication system are also disclosed.

Radio base station

A terminal is disclosed including a transmitting unit that transmits a request signal for requesting a radio base station to transmit a reference time, to the radio base station; and a receiving unit that receives a radio resource control message from the radio base station according to the transmission of the request signal, the radio resource control message including a reference system frame number and the reference time associated with the reference system frame number. In other aspects, radio base stations, a radio communication method, and a radio communication system are also disclosed.

User equipment and radio base station

A base station includes a communication unit configured to perform communication with a plurality of terminals through one or more cells, and a control unit configured to perform measurement of the number of active terminals in layer 2 measurement, wherein the control unit measures the number of the active terminals for each cell.

Base station and measurement method for optimizing layer 2 connectivity

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.

Network node and communication system

A UE () performs a random access procedure with a gNB (). The UE () transmits to a network via a radio base station at least one of a synchronization signal block used for performing the random access procedure, a reception quality in the synchronization signal block, a group of random access preambles, and number of times for which power ramping was performed in the random access procedure.

User equipment

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

Radio communication system and radio base station

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.

Base station and state control method

A central unit () holds a plurality of parameters for controlling radio communication. A distributed unit () 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 () and the distributed unit (). 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 () and the distributed unit ().

Radio base station and communication control method

When RRC connection release in a radio resource control layer reaches UE (A), gNB-DU () transmits UE CONTEXT RELEASE COMPLETE of the UE (A) to gNB-CU (). The gNB-CU () releases a context allocated to the UE (A) based on the UE CONTEXT RELEASE COMPLETE.

Radio access system and communication device

A network node in a wireless communication system comprising a user equipment and a plurality of network nodes, comprises: a reception unit for receiving from another network node or a user equipment a protocol data unit related to packet transmission that has a possibility of a plurality of data lengths with respect to sequence numbers; an acquiring unit for acquiring a sequence number of the protocol data unit related to packet transmission; and a notification unit for carrying out, based on the sequence number as acquired, notification related to packet transmission.

A communication device is disclosed including a communication unit configured to receive a message including an SCG configuration, wherein the communication unit transmits a message, which does not include the SCG configuration, to another communication device and causes the another communication device to perform full configuration. In other aspects, another communication device and a communication method are also disclosed.

Communication device and communication method

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.

Base station device

A central unit () acquires, from a user device () via a radio resource control layer, UE Capability indicative of a capability of the user device (). The central unit () forwards the acquired UE Capability to a distributed unit (). The distributed unit () holds parameters for controlling radio communication beforehand and receives the UE Capability forwarded by the central unit (). The distributed unitdetermines, based on the received UE Capability, content of the parameters according to the content of the UE Capability.

Growing community of inventors

Tokyo, Japan

Teruaki Toeda