Ntt Docomo, Inc.

Hiroki Zukawa

Takao Someya

Takefumi Yamada

Hidehiko Oyane

Fumiki Hasegawa

Toshirou Kawahara

Yutaka Fuke

A base station has a first wireless communication unit that communicates with mobile stations for offering a first radio communication service to the mobile stations, and a second wireless communication unit that communicates with mobile stations for offering a second radio communication service that is different from the first radio communication service to the mobile stations. At the base station, a communication service continuation restrictor is provided that restricts operation of the base station as to whether or not, when it is detected that either one of the first or the second radio communication service is not executable, another radio communication service should be continued. Whether or not the other communication service should be continued can be set at the communication service continuation restrictor.

Base station and communication system to restrict communication service

A radio base station BTS and a mobile station UE of the present invention includes a receiving unitconfigured to receive a plurality of downlink signals from a plurality of cells through a plurality of paths, and a cell identification determination unitconfigured to determine downlink signals with an identical scrambling code which are received during a predetermined period, as an identical downlink signals transmitted from one and the identical cell, from among the plurality of received downlink signals.

Radio base station and mobile station

A radio base stationaccording to the present invention includes a reference channel power setting unitconfigured to change a transmission power of a reference channel, an associated channel power setting unitconfigured to set a relative power offset of an associated channel by using a value relative to the reference channel, a power parameter holding unitconfigured to hold power parameters set by the reference channel power setting unitand associated channel power setting unit, a power parameter adjustment unit configured to adjust the relative power offset of the associated channel in a case where the transmission power of the reference channel is changed, and a transmitterconfigured to transmit a signal of each channel on the basis of information in the power parameter holding unit, wherein the power parameter adjustment unitmaintains the transmission power of the associated channel unchanged even though the transmission power of the reference channel is changed.

Radio base station, mobile communication system and mobile communication method for controlling a transmission power of a reference channel and an associated channel

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Yokohama, Japan

Hiroki Zukawa