Ntt Docomo, Inc.

Takeshi Nakamori

Hiroyuki Ishii

Mikio Iwamura

Yousuke Iizuka

Hideaki Takahashi

Kazuaki Takeda

Kengo Yagyu

Shinsuke Ogawa

Hiromasa Umeda

Hiroaki Yamagishi

Masashi Ishihara

A mobile station includes a parameter retrieval unit that retrieves information representing carrier frequencies of a serving cell and a neighboring cell from a radio base station, a frequency band setting unit that sets a frequency band for measuring radio quality of the serving cell and the neighboring cell, based on the information representing the carrier frequencies of the serving cell and the neighboring cell, and a measurement unit that measures the radio quality of the serving cell and the neighboring cell, based on the set frequency band.

Mobile station and communication method

Appropriate performance is required for 'Inter-Frequency Measurement' in accordance with the conditions of a cell to be subjected to 'Inter-Frequency Measurement'. A mobile communication system according to the present invention is configured to separately specify the performance required for &#x201c;Inter-Frequency Measurement&#x201d; to be used in &#x201c;Inter-frequency Handover&#x201d; control between macrocells #and #and the performance required for &#x201c;Inter-frequency Handover&#x201d; to the cell #B which is not set as an Scell within the coverage area of the macrocell #

Mobile communication system

In current LTE, different measurement cycles of a measurement process are set for respective measurement frequencies. A mobile communication method according to the present invention includes: a step A of a radio base station eNB notifying a mobile station UE of a measurement cycle for 'Inter-Frequency Measurement' for each measurement frequency; and a step B of the mobile station UE performing out a measurement process in each of cells #A and #B having frequencies f2 and f3 different from that of a cell #to which the mobile station UE is currently connected, on the basis of the measurement frequency and the measurement cycle for 'Inter-Frequency Measurement'.

Mobile communication method, radio base station and mobile station

In a user equipment UE according to the present invention which appropriately measures downlink radio quality when multi-carrier transmission is performed, the user equipment UE includes a measurement unitB configured to perform measurement processes in the first carrier and the second carrier, wherein when simultaneous communication of a downlink signal in the first carrier and a downlink signal in the second carrier is performed, the measurement unitB is configured to perform only the measurement process in the second carrier.

User equipment, base station device, and mobile communication method

A mobile station (UE) according to the present invention is configured to repeatedly transmit a first measurement report including a radio quality of a first cell and to repeatedly transmit a second measurement report including a radio quality of a second cell at the same timings, when the mobile station starts transmitting the first measurement report and thereafter starts transmitting the second measurement report.

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

User equipmentcomprises a connection state processing section configured so that the connection state processing section measures the communication quality in a cell belonging to two or more layers, reports the result of the measurement to a base station device, and performs handover processing according to the instruction from the base station deviceon the basis of first priority notified by a first control signal notified from the base station devicein an RRC_Connected state and a stand-by state processing section configured so that the stand-by state processing section measures the communication quality in the cell belonging to the two or more layers to determine a cell for performing a stand-by according to the result of the measurement on the basis of second priority notified by a second control signal notified from the base station devicein an Idle state.

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 mobile station UE includes: a measuring unit which measures the radio quality in a serving cell and a peripheral cell from a radio base station eNB; and a determining unit which determines whether to notify the measurement result. When the mobile station UE is in the discontinuous reception state, the determining unit determines whether to notify the measurement result in accordance with the radio quality in the measured serving cell and the peripheral cell and a parameter for the discontinuous reception state. When the mobile station UE is not in the discontinuous reception state, the determining unit determines whether to notify the measurement result in accordance with the radio quality in the measured serving cell and the peripheral cell and a parameter for the continuous reception state.

Mobile station, radio base station, and mobile communication method

A mobile station (UE) according to the present invention includes: a measurement unit () configured to measure a radio quality of a serving cell and a peripheral cell; a filtering unit () configured to perform filtering on the measurement result; and a determination unit () configured to determine as to whether or not to notify the measurement result after the filtering. The filtering unit () configured to adjust a filter coefficient for filtering the measurement result, when the mobile station (UE) is in a discontinuous reception state.

Mobile station and mobile communication method

There is disclosed a mobile communication terminal equipped with a multipath interference canceller for canceling multipath interference, comprising number-of-samples controlling unit for controlling a number of samples to be sampled from a received signal, channel matrix generating unit for generating a channel matrix on the basis of sample data of samples as many as the number controlled by the number-of-samples controlling means and, interference canceling emit for canceling multipath interference on the basis of the channel matrix generated by the channel matrix generating unit.

Mobile communication terminal

The packet reception section of the cellular phone receives a packet transmitted from the base station and the transmission error detection section detects a transmission error of the received packet. When the transmission error is detected, the retransmission request transmission section transmits a retransmission request to request the retransmission of the packet in which the transmission error is detected, to the base station, and the sample timing control section shifts the sample timing of the A/D converter by a half clock.

Improve efficiency of sampling of an A/D converter while suppressing power consumption. A packet receiving section receives six packets included in one frame transmitted from a base station, a sample timing control section shifts sample timing of the A/D converter by a half clock between former three packets and latter three packets out of six packets included in one frame.

Growing community of inventors

Yokohama, Japan

Takeshi Nakamori