Ntt Docomo, Inc.

Hiroshi Chin

Hideaki Takahashi

Tooru Uchino

Kengo Yagyu

Kunihiko Teshima

Yuta Sagae

Kohei Kiyoshima

A user apparatus for use in a mobile communication system including a first base station and a second base station that communicate with the user apparatus by inter-base station carrier aggregation, including: measurement means configured to measure a time difference between a subframe in the first base station and a subframe in the second base station; and notification means configured, when detecting a predetermined notification trigger, to notify the first base station or the second base station of time difference information on the time difference measured by the measurement means.

User apparatus, base station, and time difference information notification method

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

Appropriate 'idle mode cell reselection' is achieved by changing a threshold used to perform 'idle mode cell reselection' between a case of performing RSRQ measurement in six resource blocks and a case of performing &#x201c;Wideband RSRQ measurement.&#x201d; A mobile communication method according to the present invention includes a step of causing a radio base station eNB or a radio network controller RNC to broadcast not only existing parameters used to perform cell reselection processing based on a result of the RSRQ measurement in six resource blocks, but also wideband parameters used to perform &#x201c;idle mode cell reselection&#x201d; based on a measurement result of &#x201c;Wideband RSRQ measurement.&#x201d;

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Tokyo, Japan

Hiroshi Chin