Ntt Docomo, Inc.

Other

Tooru Uchino

Hideaki Takahashi

Wuri Andarmawanti Hapsari

Kazuki Takeda

Satoshi Nagata

Anil Umesh

Kazuaki Takeda

Yuta Sagae

Sadayuki Abeta

Kenichiro Aoyagi

Akihito Hanaki

Kunihiko Teshima

Hiroki Harada

Kohei Kiyoshima

Teruaki Toeda

Liu Liu

Yuichi Kakishima

Naoto Ookubo

Huiling Jiang

Tianyang Min

Mikio Iwamura

Lan Chen

Hiroyuki Ishii

Yoshihisa Kishiyama

Tomoya Ohara

Kei Andou

Lihui Wang

Daisuke Nishikawa

Ryusuke Matsukawa

Yuki Matsumura

Wei Liu

Wenbo Wang

Hiromasa Umeda

Kengo Yagyu

Takayuki Isogawa

Shogo Yabuki

Takahiro Takiguchi

Hiroshi Ou

Xiaolin Hou

Qin Mu

Li Li Zhao

Ryosuke Osawa

Yoshiaki Ofuji

Atsushi Minokuchi

Yasufumi Morioka

Takuma Takada

Mugen Peng

Atsushi Ueki

Kenji Kai

Hiroto Tooyama

Hiroshi Chin

Naoya Murata

Makoto Miyagoshi

Naoto Iizasa

A user equipment includes a transmission unit that transmits a first message including a random access preamble in a two-step random access procedure, a reception unit that receives one or more second messages for contention resolution in the two-step random access procedure, and a control unit that controls an operation to receive the second messages based on information associated with an identifier of the first message included in the second messages.

User equipment and base station apparatus

A session management apparatus including: a reception unit configured to receive, from a user plane apparatus, a time offset between a TSN time of a TSN time domain and a 5G time, and identification information of the TSN time domain; and a transmission unit configured to transmit, to a base station apparatus, a TSC assistance information determined based on the time offset and the identification information of the TSN time domain.

Session management apparatus, user plane apparatus, and access mobile management apparatus

A terminal () includes: a receiving unit () that receives, from a source gNB (A), configuration information of a candidate target cell subordinate to a target gNB (B); and a control unit () that performs a procedure for transition to the target gNB (B) based on the configuration information of the candidate target cell without performing a reestablishment procedure when a radio link failure occurs. The control unit () resumes a radio bearer suspended between the terminal () and the target gNB (B) in a case of performing the procedure for transition to the target gNB (B) based on the configuration information of the candidate target cell.

Terminal for synchronization with candidate cell

A user device comprises a communication unit configured to perform communication to which dual connectivity is applied, wherein a master cell group and a secondary cell group are configured in the dual connectivity, a control unit configured to detect occurrence of a failure in the master cell group, and a transmission unit configured to transmit information related to the occurrence of the failure in the master cell group to a master node of the master cell group, wherein the control unit changes a primary cell to another cell by performing handover to a different RAT (Radio Access Technology).

User device and base station apparatus

A user apparatus includes a transmission unit for transmitting a signal related to a random access procedure in a serving cell; a reception unit for receiving a signal related to the random access procedure in the serving cell; and a control unit for determining a carrier to be used for the random access procedure, the carrier being configured to the serving cell. The control unit determines whether a first carrier is configured to the serving cell, determines whether the first carrier of the serving cell is supported when the first carrier is configured to the serving cell, and determines to use the first carrier for the random access procedure when the first carrier of the serving cell is supported. An operation of determining the carrier to be used for the random access procedure is performed in at least one of a MAC layer and an RRC layer.

User apparatus and base station apparatus

A terminal includes a receiver that receives an instruction signal indicating to modify a configuration of a radio link monitoring; and a controller that modifies a parameter used for the configuration of the radio link monitoring in accordance with the instruction signal received by the receiver.

Terminal and communication method for radio link monitoring

User equipment includes a transmitter configured to transmit a random access preamble or an identifier of the user equipment to a base station apparatus in a two-step random access procedure, a receiver configured to receive a response signal corresponding to at least one of the random access preamble and the identifier of the user equipment, and a downlink signal based on the response signal, from the base station apparatus, and a control unit configured to determine that a contention resolution is successful when information included in the downlink signal matches a part of or all of the identifier of the user equipment.

A user equipment includes a receiving unit configured to receive system information from a cell, a control unit configured to determine, based on an information element and identifiers, whether or not the cell is a candidate to be selected, the information element indicating other uses included in the system information and identifiers being of a plurality of closed access groups (CAGs) identifying groups of subscribers who are allowed to access the cell, and a communication unit configured to perform access to the cell in a case in which the control unit determines that the cell is the candidate to be selected.

User equipment to perform access to a cell

A terminal () configures PCell and SCell simultaneously. The terminal () includes a receiving unit () that receives a reference signal for use in a detection of a beam failure in the SCell, and a controller () that performs a beam failure recovery procedure based on a reception quality of the reference signal. The SCell belongs to a predetermined group regarding the BFR procedure. The controller () performs the BFR procedure in a predetermined cell within the predetermined group.

Terminal with beam failure detection and recovery procedure

An SN (C) includes a transmitting unit () that transmits, to an MN (A) to which a terminal () is connected, a first message including configuration information of a cell formed by the SN (C), and a control unit () that determines to delete the configuration information of the cell according to a state of the cell. The transmitting unit () transmits, to the MN (A), a second message instructing deletion of the configuration information of the cell.

Master node and secondary node

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 user device includes a receiving unit configured to receive first information and second information from a base station device, the first information indicating one or more bands that are candidates for a band combination to be supported, the second information indicating which RAT (Radio Access Technology) is to be used; a control unit configured to determine, based on the second information, the band combination to be supported from among the one or more bands included in the first information; and a transmitting unit configured to transmit, to the base station device, is terminal capability information including the determined band combination.

User device and base station device

A user equipment includes a receiving unit configured to receive, from a base station apparatus, information for requesting a report of a User Equipment (UE) capability, a control unit configured to generate the report including a supported UE capability, and a transmitting unit configured to, in a case where an Access Stratum (AS) security with the base station apparatus is activated, transmit the report to the base station apparatus.

UE () executes dual connectivity in which it simultaneously connects to a radio base station and other radio base station. The UE () includes a transmitting unit () that transmits to the radio base station and the other radio base station uplink transmission related information indicating an uplink transmission state, and a control unit () that controls transmission or stop of transmission of the uplink transmission related information of a predetermined type.

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

Growing community of inventors

Tokyo, Japan

Tooru Uchino