Patents by Inventor Takeshi Nakamori
Takeshi Nakamori has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20120243429Abstract: 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 unit 22B 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 unit 22B is configured to perform only the measurement process in the second carrier.Type: ApplicationFiled: October 6, 2010Publication date: September 27, 2012Applicant: NTT DOCOMO, INC.Inventors: Takeshi Nakamori, Hiroyuki Ishii, Hiromasa Umeda
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Publication number: 20120190367Abstract: A mobile station UE according to the present invention includes: a determination unit 14 configured 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 13, and the parameter acquired by the parameter acquisition unit 12; and a notification unit 15 configured to notify the radio base station eNB of the measurement result when the determination unit 14 determines 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 unit 14 is configured to determine whether to notify the measurement result.Type: ApplicationFiled: August 18, 2010Publication date: July 26, 2012Applicant: NTT DOCOMO, INC.Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura, Kengo Yagyu
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Publication number: 20120094607Abstract: A mobile station (UE) according to the present invention includes: a measurement unit (13) configured to measure a radio quality of a serving cell and a peripheral cell; a filtering unit (14) configured to perform filtering on the measurement result; and a determination unit (15) configured to determine as to whether or not to notify the measurement result after the filtering. The filtering unit (14) configured to adjust a filter coefficient for filtering the measurement result, when the mobile station (UE) is in a discontinuous reception state.Type: ApplicationFiled: March 24, 2010Publication date: April 19, 2012Applicant: NTT DOCOMO, INC.Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura
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Publication number: 20110207414Abstract: 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.Type: ApplicationFiled: July 28, 2009Publication date: August 25, 2011Applicant: NTT DOCOMO, INC.Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura
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Publication number: 20110195706Abstract: A mobile station UE includes a measurement unit (13) and a determining unit (14) which determines whether to notify a measurement result obtained by the measurement unit (13) in accordance with the measurement result and an a parameter for determination. When the mobile station UE is in an discontinuous reception state, the measurement unit (13) continues measurement even after the reception period ends if a predetermined condition is satisfied and stops the measurement if the predetermined condition is not satisfied before the determining unit (14) determines to notify the measurement result.Type: ApplicationFiled: August 12, 2009Publication date: August 11, 2011Applicant: NTT DOCOMO, INC.Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura
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Publication number: 20110151876Abstract: User equipment 100n comprises 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 200, and performs handover processing according to the instruction from the base station device 200 on the basis of first priority notified by a first control signal notified from the base station device 200 in 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 device 200 in an Idle state.Type: ApplicationFiled: March 19, 2009Publication date: June 23, 2011Applicant: NTT DOCOMO, INC.Inventors: Hiroyuki Ishii, Mikio Iwamura, Takeshi Nakamori
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Publication number: 20110009067Abstract: 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.Type: ApplicationFiled: May 29, 2009Publication date: January 13, 2011Applicant: NTT DOCOMO, INC.Inventors: Mikio Iwamura, Hiroaki Yamagishi, Hiroyuki Ishii, Takeshi Nakamori
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Patent number: 7817710Abstract: 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.Type: GrantFiled: August 7, 2006Date of Patent: October 19, 2010Assignee: NTT DoCoMo, Inc.Inventors: Takeshi Nakamori, Hiroyuki Ishii, Yousuke Iizuka
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Patent number: 7706491Abstract: 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.Type: GrantFiled: March 9, 2006Date of Patent: April 27, 2010Assignee: NTT DoCoMo, Inc.Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka
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Patent number: 7602871Abstract: 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.Type: GrantFiled: March 10, 2006Date of Patent: October 13, 2009Assignee: NTT DoCoMo, Inc.Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka
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Publication number: 20090023392Abstract: An increase in the power consumption and deterioration of the reception characteristic which can arise as a result of installing a multi-path interference removing apparatus are suppressed. The multi-path interference removing apparatus is operated only in the following cases: a case where a mobile communication terminal is in a communication active state, a case where communication takes place via a base station to which the adaptive modulation and coding technology is applied, a case where the number of reception paths of the mobile communication terminal is two or more paths, a case where the speed of motion of the mobile communication terminal is 60 km/h or less, and a case where the Signal to Interference power Ratio is 8 dB or more.Type: ApplicationFiled: January 23, 2006Publication date: January 22, 2009Applicant: NTT DoCoMo, Inc.Inventors: Yousuke Iizuka, Shinsuke Ogawa, Takeshi Nakamori
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Publication number: 20080253310Abstract: Properties of a mobile communication terminal car be improved by eliminating interference according to environments of various reception paths. The mobile communication terminal generates a delay profile by a common pilot chapel sent from a base station and measures received electric power and delay amount of the reception path. Next, based on the delay profile, the delay amount of a reception path P4 farthest from a reference path P1 is set as a maximum delay amount D. However the farthest reception path P4 is excluded from the subjects of interference elimination when the electric power of which differs by a amount not less than 10 dB with respect to the electric power of the reference path P1, and the delay amount of a reception path P3 next farthest from the reference path P1 is set as the maximum delay amount D. After that, a chapel matrix s generated based on the number of samples and the maximum delay amount D.Type: ApplicationFiled: January 17, 2006Publication date: October 16, 2008Applicant: NTT DOCOMO, INC.Inventors: Yousuke Iizuka, Takeshi Nakamori, Shinsuke Ogawa
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Publication number: 20070036205Abstract: 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.Type: ApplicationFiled: August 7, 2006Publication date: February 15, 2007Applicant: NTT DoCoMo, Inc.Inventors: Takeshi Nakamori, Hiroyuki Ishii, Yousuke Iizuka
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Publication number: 20060218457Abstract: 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.Type: ApplicationFiled: March 9, 2006Publication date: September 28, 2006Applicant: NTT DoCoMo, Inc.Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka
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Publication number: 20060203854Abstract: 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.Type: ApplicationFiled: March 10, 2006Publication date: September 14, 2006Applicant: NTT DoCoMo, Inc.Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka