Ntt Docomo, Inc.

Akihito Hanaki

Yoshikazu Goto

Takahiro Hayashi

Junichiro Kawamoto

Yukiko Takagi

Hiroyuki Ishii

Hideaki Takahashi

Takehiro Nakamura

Wuri Andarmawanti Hapsari

Masafumi Usuda

Hiroki Harada

Yuki Matsumura

Tooru Uchino

Kenichiro Aoyagi

Hidehiko Oyane

Tatsuro Yajima

Yoshimasa Imamura

Minami Ishii

Sung Uk Moon

Koji Furutani

Mayu Yamada

Shinya Tanaka

Anil Umesh

Tomoya Ohara

Teruaki Toeda

Shogo Yabuki

Daisuke Tanigawa

Hidekazu Shimodaira

Akihiro Fujiwara

Yuta Sagae

Yousuke Sano

Kei Kikuiri

Hiromasa Umeda

Yoshiaki Ofuji

Masahiro Fujii

Masashige Shirakabe

Tomoki Sao

Takuto Arai

Hiroshi Ou

Naoya Murata

Takashi Kosugi

A terminal includes a receiver that receives an index that specifies configuration information for transmitting a random access preamble; and a controller that configures, when the receiver receives additional information that specifies a time domain resource for transmitting the random access preamble and the index falls within a specific numerical range, the time domain resource specified by the additional information, the time domain resource being configured by replacing a time domain resource for transmitting the random access preamble included in the configuration information specified by the index with the time domain resource specified by the additional information.

Terminal and transmission method

A user equipment includes a receiving unit configured to receive, from a base station apparatus, information designating a Bandwidth Part (BWP) of a cell, a control unit configured to configure a BWP to be activated, based on a parameter dedicated to the user equipment included in the information, when: the cell is a Special Cell (SpCell) and a configuration by a Radio Resource Control (RRC) is executed; or the cell is a Secondary Cell (SCell) and a Media Access Control (MAC) layer is activated, and a communication unit configured to communicate with the base station apparatus by using the BWP to be activated, wherein the parameter is configured in information for designating the BWP of the cell, irrespective of the number of BWPs configured for the cell.

User equipment and base station apparatus

A terminal includes a receiver that receives an index specifying configuration information for transmitting a random access preamble; and a controller that configures, in response to the receiver receiving additional information that specifies a time domain resource for transmitting the random access preamble, the time domain resource specified by the additional information, the time domain resource being configured by replacing a time domain resource for transmitting the random access preamble included in the configuration information specified by the index with the time domain resource specified by the additional information.

A terminal includes a reception unit that receives, from a base station, a message for requesting to report a terminal capability, a control unit that configures information for reporting a parameter associated with a codebook based on information for indicating a range of the parameter associated with the codebook included in the message for requesting the report of the terminal capability, and that includes, in a message for reporting the terminal capability, the information for reporting the parameter associated with the codebook, and a transmission unit that transmits the message for reporting the terminal capability to the base station.

Terminal, base station and communication method

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.

User equipment and radio base station

A FrontHaul Multiplexer (FHM) for relaying communications between a signal processing device and a plurality of radio devices includes a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.

Signal processing device, radio device, front haul multiplexer, beam control method, and signal combining method

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 user equipment includes a transmission unit that transmits, to a base station, information indicating a specific band combination supported by the user equipment for carrier aggregation and combinations of maximum numbers of Multiple-input and multiple-output (MIMO) layers to be applied to respective component carriers of frequency bands included in the specific band combination, the combinations of the maximum numbers of MIMO layers being supported by the user equipment; and a control unit that applies a default value as the maximum numbers of MIMO layers to be applied, by the user equipment, to the respective component carriers of the frequency bands included in the specific band combination, when a signal indicating the maximum numbers of MIMO layers to be applied, by the base station, to the respective component carriers of the frequency bands included in the specific band combination is not received from the base station.

User equipment 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

UE () performs Asymmetric ROHC that applies header compression in a packet data convergence protocol layer to either an uplink or a downlink. The UE () includes a data transmitting-receiving unit () that receives from eNB a support notification indicating that the Asymmetric ROHC is supported and a capability notifying unit () that notifies, when the data transmitting-receiving unit () receives the support notification, the eNB of information to be used for setting the Asymmetric ROHC by including a profile of the Asymmetric ROHC in capability information of the UE ().

Radio communication device and radio communication method

Priority control is performed using FPIs. A radio base station eNB according to the present invention includes: a bearer management unitconfigured to manage FPIs assigned to data flows received from a core network device S-GW via an S1 bearer; and a priority control unitconfigured to perform priority control over the data flows received from the core network device S-GW via the S1 bearer, in which the bearer management unitestablishes a radio bearer with a mobile station UE for each of the FPIs, and the priority control unittransfers each data flow received from the core network device S-GW via the S1 bearer, to the radio bearer corresponding to the FPI assigned to the data flow.

Radio base station and mobile station

When a packet in which a 'Static part' is changed is detected in a session established in a bearer, it is possible to prevent the packet from being discarded. A radio base station (eNB) according to the present invention includes a communication control unit () configured to control communication via a session (an RTP session or an RTCP session) with a mobile station (UE). The communication control unit () is configured such that, when a change in a 'Static part' in a header of a received packet is detected, even if adding a new session to transmit the packet makes the number of sessions established in a bearer (#) exceed a capability of the radio base station (eNB) or the mobile station (UE), the communication control unit () transmits the packet via the new session.

Radio base station

There is provided user equipment for communicating with a base station in a mobile communication system including the base station and the user equipment, the user equipment including a PDCP layer processor provided with a storage unit that receives and stores a plurality of acknowledgement signals to be transmitted to the base station; and an RLC layer processor that transmits, to the PDCP layer processor, a signal transmission grant signal that indicates that transmission of an uplink signal is allowed, wherein, upon receiving the signal transmission grant signal, the PDCP layer processor transmits, to the RLC layer processor, an acknowledgement signal that is received most recently among the plurality of acknowledgement signals.

User equipment, base station, and communication method

In a state where a mobile station UE is communicating with a radio base station S-eNB supporting 'extended PDCP-SN,' the mobile terminal continues communications even if it performs a reconnection procedure with a radio base station T-eNB not supporting 'extended PDCP-SN.' A mobile communication method according to the invention includes the steps of, when detecting RLF in the bearer in the above-described state, the mobile station UE resetting setting of &#x201c;extended PDCP-SN&#x201d; and establishing a bearer using &#x201c;conventional PDCP-SN&#x201d; by performing a reconnection procedure with a radio base station T-eNB not supporting &#x201c;extended PDCP-SN.&#x201d;

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Yokohama, Japan

Akihito Hanaki