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).

  • Publication number: 20120243429
    Abstract: 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: Application
    Filed: October 6, 2010
    Publication date: September 27, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Takeshi Nakamori, Hiroyuki Ishii, Hiromasa Umeda
  • Publication number: 20120190367
    Abstract: 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: Application
    Filed: August 18, 2010
    Publication date: July 26, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura, Kengo Yagyu
  • Publication number: 20120094607
    Abstract: 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: Application
    Filed: March 24, 2010
    Publication date: April 19, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura
  • Publication number: 20110207414
    Abstract: 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: Application
    Filed: July 28, 2009
    Publication date: August 25, 2011
    Applicant: NTT DOCOMO, INC.
    Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura
  • Publication number: 20110195706
    Abstract: 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: Application
    Filed: August 12, 2009
    Publication date: August 11, 2011
    Applicant: NTT DOCOMO, INC.
    Inventors: Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura
  • Publication number: 20110151876
    Abstract: 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: Application
    Filed: March 19, 2009
    Publication date: June 23, 2011
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroyuki Ishii, Mikio Iwamura, Takeshi Nakamori
  • Publication number: 20110009067
    Abstract: 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: Application
    Filed: May 29, 2009
    Publication date: January 13, 2011
    Applicant: NTT DOCOMO, INC.
    Inventors: Mikio Iwamura, Hiroaki Yamagishi, Hiroyuki Ishii, Takeshi Nakamori
  • Patent number: 7817710
    Abstract: 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: Grant
    Filed: August 7, 2006
    Date of Patent: October 19, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takeshi Nakamori, Hiroyuki Ishii, Yousuke Iizuka
  • Patent number: 7706491
    Abstract: 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: Grant
    Filed: March 9, 2006
    Date of Patent: April 27, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka
  • Patent number: 7602871
    Abstract: 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: Grant
    Filed: March 10, 2006
    Date of Patent: October 13, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka
  • Publication number: 20090023392
    Abstract: 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: Application
    Filed: January 23, 2006
    Publication date: January 22, 2009
    Applicant: NTT DoCoMo, Inc.
    Inventors: Yousuke Iizuka, Shinsuke Ogawa, Takeshi Nakamori
  • Publication number: 20080253310
    Abstract: 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: Application
    Filed: January 17, 2006
    Publication date: October 16, 2008
    Applicant: NTT DOCOMO, INC.
    Inventors: Yousuke Iizuka, Takeshi Nakamori, Shinsuke Ogawa
  • Publication number: 20070036205
    Abstract: 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: Application
    Filed: August 7, 2006
    Publication date: February 15, 2007
    Applicant: NTT DoCoMo, Inc.
    Inventors: Takeshi Nakamori, Hiroyuki Ishii, Yousuke Iizuka
  • Publication number: 20060218457
    Abstract: 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: Application
    Filed: March 9, 2006
    Publication date: September 28, 2006
    Applicant: NTT DoCoMo, Inc.
    Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka
  • Publication number: 20060203854
    Abstract: 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: Application
    Filed: March 10, 2006
    Publication date: September 14, 2006
    Applicant: NTT DoCoMo, Inc.
    Inventors: Takeshi Nakamori, Shinsuke Ogawa, Yousuke Iizuka