Ntt Docomo, Inc.

Other

Fujitsu Corporation

Ntt Mobile Communications Network, Inc.

Sadayuki Abeta

Mamoru Sawahashi

Minami Ishii

Hiroyuki Atarashi

Anil Umesh

Hideaki Takahashi

Atsushi Harada

Takehiro Nakamura

Tooru Uchino

Hiroyuki Ishii

Kazuaki Takeda

Wuri Andarmawanti Hapsari

Mikio Iwamura

Yoshihisa Kishiyama

Satoshi Nagata

Nobuhiko Miki

Kenichiro Aoyagi

Fumiyuki Adachi

Yuta Sagae

Noriyuki Maeda

Kenichi Higuchi

Yoshiaki Ofuji

Kohei Kiyoshima

Akihito Morimoto

Yasuhiro Kato

Motohiro Tanno

Daisuke Nishikawa

Koichi Okawa

Kazuki Takeda

Takashi Suzuki

Hiroyuki Seki

Masafumi Usuda

Yasuyuki Watanabe

Tsuyoshi Shimomura

Dai Kimura

Hiromasa Umeda

Naoto Okubo

Masayuki Motegi

Kengo Yagyu

Kunihiko Teshima

Atsushi Ueki

Takehiro Ikeda

Hideyuki Matsutani

Kota Fujimura

Takahiro Takiguchi

Ryusuke Matsukawa

Yukiko Hanada

Shingo Suwa

Soulisak Ormsub

Tetsuto Shimomura

A user equipment in a radio communication system including the user equipment and a base station, the user equipment including: a transmission unit that transmits a first maximum bandwidth, which is a maximum bandwidth available to the user equipment for communication, to the base station; and a reception unit that receives, from the base station, a center frequency or frequencies on both ends of a band having a bandwidth, which is equal to or less than the first maximum bandwidth, within a band having a second maximum bandwidth that is a maximum bandwidth available to the base station for communication.

Flexible use of a band with a bandwidth provided in accordance with capability of a terminal

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.

Base station

Based on an entering condition for reporting reception quality of a cell via Measurement Report, UE () transmits to a radio access network the Measurement Report. The UE () judges numberOfTriggeringCell that triggers transmission of the measurement report to the radio access network, and transmits the Measurement Report when the number of neighbor cells that fulfill the entering condition is equal to or more than the numberOfTriggeringCell.

User device and measurement report transmitting method

A user terminal includes a receiver that receives a downlink shared channel and a processor that obtains a transport block size (TBS) used for the downlink shared channel based on: a TBS index value that is associated with a modulation and coding scheme (MCS) index value used for the downlink shared channel; and a number of resource blocks (RBs) that are allocated to the downlink shared channel. When the downlink shared channel is transmitted by a predetermined transmission scheme and the MCS index value is a predetermined value, the processor modifies the TBS index value associated with the predetermined value and obtains the TBS based on the modified TBS index value and the number of RBs.

User terminal, radio base station, and radio communication method

A technique of promptly implementing appropriate flow control in distributed transmission is provided. An aspect of the present invention relates to a base station serving as a distribution source base station in distributed transmission in which transmission target packets are divided and transmitted from a plurality of base stations to a user equipment, wherein the base station includes a feedback information acquiring unit that acquires radio environment information of a distribution destination base station in the distributed transmission; and a communication control unit that controls the distributed transmission according to the radio environment information.

Base station and transmission control method

A system for supporting smooth mobility of a mobile terminal apparatus between a plurality of local areas that are arranged in a wide area is disclosed. The system includes a wide area base station apparatus that covers a wide area, a local area base station apparatus that covers a local area arranged in the wide area, and a mobile terminal apparatus that can communicate with the wide area base station apparatus and the local area base station apparatus, and is configured to scramble a data signal and a reference signal by a scrambling sequence that is common between a plurality of local areas in communication between the local area base station apparatus and the mobile terminal apparatus.

Communication system, mobile terminal apparatus, local area base station apparatus and communication method

There is provided user equipment for communicating with a first base station and a second base station, the user equipment including a receiver that receives, form the first base station or the second base station with which an RRC connection is established, a first message indicating to establish a split bearer between the first base station and the second base station; and a communicator that establishes the split bearer between the first base station and the second base station that are reported by the first message, wherein, in the split bearer, a process of a PDCP layer is performed by one of the first base station and the second base station.

User equipment and communication method

A user apparatus is provided. The user apparatus is included in a mobile communication system including a first base station, a second base station communicating with the first base station, and the user apparatus communicating with the first base station. The user apparatus includes an obtaining unit configured to obtain from the second base station instruction information indicating an error correction processing operation performed between the first base station and the user apparatus; and a communication unit configured to communicate with the first base station by performing the error correction processing based on the instruction information.

User apparatus and base station

An adequate transmission rate is guaranteed in a case where 'Inter-node UP aggregation' is being performed. In a mobile station according to the present invention, each of MAC layer functions includes a cost management unit configured to manage a cost of an LCH involved in 'Inter-node UP aggregation', a priority management unit configured to manage a priority of the LCH, and a bearer management unit configured to allocate transmission resources to data for the LCH based on the priority and the cost of the LCH. The cost management unit is configured to update the cost of the LCH managed by the cost management unit itself, based on a PBR value informed by a network.

Mobile station and mobile communication system

An object is to improve the throughput of a mobile station UE without affecting the coverage of a macrocell in a case where CA is introduced to a HetNet environment. A radio base station eNB according to the present invention is configured to determine whether or not to change the connection destination of a mobile station UE from a small cell #to a small cell #while the mobile station UE is performing CA by using the macrocell and the small cell #, based on at least one of the congestion status in each of the small cell #and the small cell #and the communication quality in each of the small cell #and the small cell #

Radio base station

A system and method to prevent collision between mobile stations to which the same C-RNTI is allocated in a simple implementation while avoiding a problem of C-RNTI depletion in a phantom cell is disclosed. A radio base station includes an allocation unit configured to allocate multiple C-RNTIs to each of mobile stations, and the allocation unit performs adjustment such that collision of search spaces to which PDCCH resources are allocated does not occur among the multiple mobile stations.

Radio base station and mobile station

To improve probability of successfully performing origination processing by a priority terminal and origination processing of an emergency call even during congestion. In a mobile station UE according to the present invention, an AS function unitis configured to receive SSAC information from a radio base station eNB and transmit the SSAC information to the NAS function unitat a predetermined timing, and a NAS function unitis configured to perform SSAC on transmission of 'RA Preamble' in a RA procedure for the mobile station UE in the DRX state to transmit an uplink signal, or on transmission of an uplink signal from the mobile station UE in the Non-DRX state.

Mobile station performing access control with NAS restriction information sent from radio base station

The present invention is designed to provide highly efficient small cell radio access. In a communication system to include a macro station (), a local station (), and a mobile terminal apparatus (), the local station () generates measurement signals that are used in measurements in the mobile terminal apparatus () based on user an identifier or a user group identifier, and transmits this signal to the mobile terminal apparatus (). The mobile terminal apparatus () receives the measurement signals transmitted from the local station () and carries out with measurements with respect to the measurement signals based on the user identifier or the user group identifier.

Communication system, base station apparatus, mobile terminal apparatus and communication method

The present invention aims to reduce an insertion loss or the like caused by a diplexer inserted to reduce leakage from an uplink bandwidth to a downlink bandwidth of different bands, and thereby to improve a communication quality. A mobile communication method according to the present invention includes the steps of: transmitting simultaneous transmission capability information from a mobile station UE to a radio base station eNB, the simultaneous transmission capability information indicating whether or not the mobile station UE is able to transmit uplink data signal via multiple carriers in multiple bands within a same sub-frame in performing uplink CA; performing scheduling for the mobile station UE by the radio base station eNB based on the simultaneous transmission capability information; and performing communications by the mobile station UE based on the scheduling information.

Mobile communication method, radio base station, and mobile station

Growing community of inventors

Yokohama, Japan

Sadayuki Abeta