Ntt Docomo, Inc.

Kengo Yagyu

Shinji Takeda

Hideaki Takahashi

Hidenori Aoki

Atsushi Fujiwara

Yoichi Matsumoto

Hiroshi Chin

Hiroyuki Ishii

Tooru Uchino

Mikio Iwamura

Yuta Sagae

Koji Omae

Takeshi Nakamori

Anil Umesh

Wuri Andarmawanti Hapsari

Narumi Umeda

Sadayuki Abeta

Akira Yamada

Akira Ishii

Hiroyuki Atarashi

Hiromasa Umeda

Takatoshi Sugiyama

Tomoyuki Ohya

Kohei Kiyoshima

Shinichi Mori

Kunihiko Teshima

Takahiro Takiguchi

Soulisak Ormsub

A mobile station which configures a plurality of component carriers to communicate with a base station is discloses herein including a reception unit configured to receive from the base station a gap pattern according to which a portion of an inter-frequency measurement duration is used for data communication and a communication control unit configured to control communication according to the gap pattern.

Mobile station, base station, and communication control method

A user apparatus in a mobile communication system including a base station and the user apparatus, including: reception means that receives, from the base station, a parameter for all symbols that is used when performing cell selection processing or cell reselection processing based on all symbol signal reception quality that is signal reception quality based on measurement in all OFDM symbols; and cell selection control means that performs measurement of the all symbol signal reception quality, and performs cell selection processing or cell reselection processing by using a result of the measurement and the parameter for all symbols received by the reception means.

User apparatus, base station, cell selection control method, and parameter transmission method

An object of the present invention is to provide techniques for implementing inter-frequency measurement with flexible small gap measurement corresponding to capability of user equipment and/or to-be-measured cells. One aspect of the present invention relates to user equipment for transmitting and receiving radio signals to/from a base station, comprising: a capability information indication unit configured to indicate capability information of the user equipment to the base station; and an inter-frequency measurement unit configured to perform, upon receiving a small gap measurement applied inter-frequency measurement indication from the base station, a small gap measurement applied inter-frequency measurement in accordance with a small gap period for causing communication with the base station to be interrupted and an inter-frequency measurement period indicated in the inter-frequency measurement indication.

User equipment, base station, and method for indicating inter-frequency measurement to a user equipment from a base station

A user apparatus in a mobile communication system supporting carrier aggregation includes a measurement unit configured to measure an rs-sinr (reference signal-signal to interference and noise ratio) for a reference signal in a physical downlink control channel transmitted from a base station; and a reporting unit configured to report the measured rs-sinr to the base station in accordance with a predefined reporting trigger.

User equipment, band balancing controller and RS-SINR reporting method

The present disclosure relates to some techniques for controlling carrier aggregation properly in a radio communication system including a mixture of harmonic-supported user equipments and harmonic-unsupported user equipments. One aspect of the present invention relates to a user equipment having a carrier aggregation function, comprising: a communication control unit configured to control radio communication with a base station; a capability management unit configured to manage a requirement on transmission and reception characteristics supported by the user equipment for each combination of carrier aggregation frequency bands; and a capability reporting unit configured to report the requirement on the transmission and reception characteristics supported by the user equipment as a capability to the base station.

User equipment and capability reporting method

In CA performed using three or more frequency bands, whether or not a mobile station UE is capable of performing an inter-frequency measurement without a gap is properly determined. The mobile station UE according to the invention includes a transmission unitconfigured to transmit 'UE Capability' indicating a capability of the mobile station UE to a radio base station eNB. The transmission unitis configured to notify frequency bands in which the mobile station UE is capable of performing an inter-frequency measurement without a gap for each 'CA band combination' as the &#x201c;UE Capability&#x201d;.

Mobile station and radio base station

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 mobile station UE according to the present invention includes a controller unit. When '1' is set in 'R' in the &#x201c;Activation/Deactivation MAC Control Element&#x201d;, the controller unitactivates only an uplink in a Scell corresponding to &#x201c;Ci&#x201d; set to &#x201c;1&#x201d;, and deactivates only the uplink in a Scell corresponding to &#x201c;Ci&#x201d; set to &#x201c;0&#x201d;.

Radio base station and mobile station

A mobile station UE according to the present invention includes: a determination unitconfigured to determine whether to notify a measurement result based on the radio quality in the serving cell and the neighboring cell measured by the measurement unit, and the parameter acquired by the parameter acquisition unit; and a notification unitconfigured to notify the radio base station eNB of the measurement result when the determination unitdetermines that the measurement result is to be transmitted, in which only when a first predetermined period or more has elapsed after the mobile station UE starts to communicate with the serving cell, the determination unitis configured to determine whether to notify the measurement result.

Mobile station, radio base station, mobile communication system, and mobile communication method

A radio base station eNB according to the present invention includes a CA controller unitconfigured to determine a PCC and SCCs to be used for CA communications, and a receiver unitconfigured to receive 'Measurement Report' from a mobile station UE having detected a cell having a higher radio quality in a certain SCC than a predetermined threshold for a period of TTT or longer, the 'Measurement Report' containing the radio quality of the detected cell. If the cell having the highest radio quality in a measurement object CC is not under the control of the radio station eNB, the CA controller unitavoids use of the cell having the highest radio quality for SCC communications in the CA communications.

Radio base station and mobile communication method

A radio communication control device includes a radio parameter update determination portion, a transmission power value change portion and a radio parameter update portion. The radio parameter update determination portion determines whether or not to update a radio parameter relating to at least one of a communication frequency and transmission power to a new radio parameter. The transmission power value change portion performs a transmission power change process to change a transmission power value during data transmission to a radio communication station to a smaller value in stages at predetermined intervals when the radio parameter update determination portion determines to update the radio parameter to the new radio parameter. A radio parameter update portion updates the radio parameter to the new radio parameter when the transmission power value change portion changes the transmission power value to a preset lower limit or less.

Radio communication control device, radio communication control system, and radio communication control method

A wireless communication apparatus is provided. The wireless communication apparatus includes: detection means that detects that there is another wireless communication apparatus around the wireless communication apparatus; comparison means that compares a first reference value managed in the wireless communication apparatus with a second reference value managed in the another wireless communication apparatus; means that corrects the first reference value based on the comparison result; and means that announces the first reference value to the another wireless communication apparatus. Frequencies are set such that a frequency of the wireless communication apparatus becomes same as a frequency of still another wireless communication apparatus to which a radio wave of the wireless communication apparatus does not reach but a radio wave of the another wireless communication apparatus reaches.

Wireless communication apparatus and wireless communication method

A fault-tolerant packet transmission system is disclosed that can avoid localized load concentration on a specific portion of a network, while autonomously keeping route optimization, without adding a route control function to non-mesh devices. In a packet transmission system including multiple wireless base stations and one or more terminal devices belonging to one of the wireless base stations, each of the wireless base stations has a location table describing each of the terminal devices associated with a corresponding wireless base station to which the terminal device currently belongs. The wireless base stations exchange the information in the location table with each other to update the location tables and forward a received packet to the next hop along a transmission route toward a destination terminal device.

Packet transfer system, radio base station, and packet transfer route optimization method

A channel allocation method for dynamically allocating channels of a plurality of radio interfaces at each access point included in a mesh network is provided. The method includes the steps of (a) acquiring, at each access point, in-node information about the access point itself, and (b) grouping high-traffic access points in a cluster using a same channel set based on the acquired information.

Channel allocation for access point in mesh network

A wireless communication apparatus for performing communication via a plurality of wireless interfaces in a wireless ad hoc network is disclosed. When the wireless communication apparatus receives a request frame via one of the plurality of wireless interfaces, the wireless communication apparatus sends the request frame from at least two wireless interfaces in the plurality of wireless interfaces. In addition, the wireless communication apparatus selects a wireless interface to be used for communication from among the plurality of wireless interfaces based on the request frame.

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Yokohama, Japan

Kengo Yagyu