Ntt Docomo, Inc.

Other

Anil Umesh

Masafumi Usuda

Takehiro Nakamura

Mikio Iwamura

Wuri Andarmawanti Hapsari

Minami Ishii

Tooru Uchino

Hideaki Takahashi

Hiroyuki Ishii

Sadayuki Abeta

Atsushi Harada

Teruaki Toeda

Sung Uk Moon

Naoto Ookubo

Yuta Sagae

Nobuhiko Miki

Yasuhiro Kato

Shinya Tanaka

Koichi Okawa

Kazuaki Takeda

Kenichi Higuchi

Akihito Hanaki

Hiromasa Umeda

Yoshiaki Ofuji

Naoto Okubo

Daisuke Nishikawa

Kohei Kiyoshima

Masayuki Motegi

Kunihiko Teshima

Tadashi Uchiyama

Seigo Harano

Daisuke Hiratsuka

Satoshi Nagata

Kazuki Takeda

Mamoru Sawahashi

Yoshihisa Kishiyama

Takashi Suzuki

Kenichiro Aoyagi

Tetsushi Abe

Takeshi Okamoto

Yousuke Sano

Kengo Yagyu

Takuya Sato

Hidehiro Ando

Kenji Kai

Takahiro Takiguchi

Ryusuke Matsukawa

Kouji Makino

Takuto Arai

Hiroshi Ou

Hideaki Takahashii

Shinichi Sasaki

Suguru Okuyama

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.

Management node, distributed unit, radio communication system, and radio communication method

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.

Communication device

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

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 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.

Base station

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

CN () acquires from UE () UE Capability ID of UE Capability that indicates capability of the UE (), and manages the UE Capability and the UE Capability ID by associating them with each other. The CN () transmits to gNB () 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 ().

Radio communication system, network device, user device, radio base station and radio communication method

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 () including a remote device () and a central aggregation device () and that performs radio communication with a user device (). The communication control method includes transmitting including the central aggregation device () transmitting to the remote device () paging information that is information used for performing paging on the user device (), and performing including the remote device () setting a downlink physical channel based on the paging information received from the central aggregation device () and performing the paging.

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.

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

Upon receiving, from UE (), SCG Failure Information that indicates that a radio link failure has occurred in a secondary cell group, eNB (A) transmits, to gNB (B), 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 (B) releases the resource of the split bearer below the predetermined layer in the secondary cell group. The eNB (A) 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.

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 eNBconforming to LTE and a 5G-BSconforming to 5G. The eNBincludes an RRC function unitthat performs control based on LTE-RRC, which is an RRC protocol in LTE. The 5G-BSincludes an RRC function unitthat performs control based on 5G-RRC, which is the RRC protocol in 5G. The RRC function unithas at least a function not specified in LTE-RRC.

Radio communication system and user device

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.

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 deviceand a remote device, the central aggregation devicetransmits code blocks in a number necessary for generating an OFDM symbol as a piece of data to the remote device, the code blocks being produced by dividing user data into units of encoding processing.

Communication system having a central aggregation device and a remote device

Growing community of inventors

Yokohama, Japan

Anil Umesh