Patents by Inventor Kenji Takagi

Kenji Takagi 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).

  • Patent number: 7751820
    Abstract: There are a wireless access network comprising a radio network gateway apparatus (101), radio access network control apparatus (102a), (102b) and a base stations (103a), (103b) and a terminal (104) accommodated in the wireless access network and when the terminal (104) enters into a new cell B, a packet data is transmitted from the source radio access network control apparatus (102a) to the target radio access network control apparatus (102b). Further, when the terminal (104) switches the radio access network control apparatus (102) with which the terminal (104) communicates, the target radio access network control apparatus (102b) switches a transmission line of a data to be transmitted to the terminal (104) from a wireless data to a packet data in the source radio access network control apparatus (102a), and from the source packet data to a target packet data in a synchronized manner at each timing.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: July 6, 2010
    Assignee: Panasonic Corporation
    Inventors: Hidenori Ishii, Kenji Takagi
  • Patent number: 7664458
    Abstract: A table identifying a correspondence between a cell and a main base station accommodating the cell is prepared in a node (wireless network control apparatus or main base station) within a radio access network. When a terminal is moved and enters an overlapped area of cells (a) and (b) from an original cell (a), where a main base station (to which the terminal was connected in the cell (a) can accommodate the cell (b) that the terminal has entered, the sub base station is connected to the main base station, and site diversity is performed in the main base station. When site diversity is performed between main base stations in a radio access network using a base station in which a baseband processing section is separated from a radio transmission/reception section, traffic flowing between the wireless network control apparatus and the base station is reduced.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: February 16, 2010
    Assignee: Panasonic Corporation
    Inventors: Hidenori Ishii, Kenji Takagi
  • Publication number: 20090297198
    Abstract: A fixing apparatus includes a control circuit which controls the electrifying to a first heater so that a temperature detected by a first temperature detection portion reaches a first target temperature and controls the electrifying to a second heater so that a temperature detected by a second temperature detection portion reaches a second target temperature, when warm-up is initiated, and, when the warm-up initiated, if an initial temperature of a rotary member is below a predetermined temperature, the control circuit sets the first target temperature to a temperature value greater than the first target temperature set when the initial temperature of the rotary member is greater than the predetermined temperature and sets the second target temperature to a temperature value greater than the second target temperature set when the initial temperature of the rotary member is greater than the predetermined temperature.
    Type: Application
    Filed: August 5, 2009
    Publication date: December 3, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideo Nanataki, Takashi Nomura, Kenji Takagi
  • Publication number: 20090267842
    Abstract: It is an object to relieve deterioration in efficiency due to the influence electromagnetic coupling between antennas and to obtain a high diversity gain, and a high transmission speed and a large communication capacity in an MIMO system. In a portable wireless machine including two types of antennas 11A and 11B for receiving a digital modulating signal, matching circuits 12A and 12B set individually to the antennas 11A and 11B respectively, tuners 13A and 13B, demodulating portions 14A and 14B, a combining portion 15 for combining a demodulated signal, and receiving quality deciding portions 17A, 17B and 17C for outputting receiving qualities in respective branches and after a combination, a diversity effect decision is made by using the receiving quality after the combination and a receiving quality in a single branch receipt, and a matching condition of the matching circuit 12A or the matching circuit 12B of the antenna 11A or the antenna 11B is controlled corresponding to a result.
    Type: Application
    Filed: February 14, 2006
    Publication date: October 29, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Kenji Takagi, Toshiteru Hayashi, Tsukasa Takahashi, Yutaka Saito
  • Patent number: 7599637
    Abstract: A fixing apparatus includes a control circuit which controls the electrifying to a first heater so that a temperature detected by a first temperature detection portion reaches a first target temperature and controls the electrifying to a second heater so that a temperature detected by a second temperature detection portion reaches a second target temperature, when warm-up is initiated, and, when the warm-up initiated, if an initial temperature of a rotary member is below a predetermined temperature, the control circuit sets the first target temperature to a temperature value greater than the first target temperature set when the initial temperature of the rotary member is greater than the predetermined temperature and sets the second target temperature to a temperature value greater than the second target temperature set when the initial temperature of the rotary member is greater than the predetermined temperature.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 6, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideo Nanataki, Takashi Nomura, Kenji Takagi
  • Publication number: 20090168614
    Abstract: According to one embodiment, a spherical aberration correction apparatus includes a pickup which applies laser light to an optical disk through an objective lens, a photodetector which detects laser light incident through the objective lens as reflected light from the optical disk, a liquid crystal panel which corrects a spherical aberration of the objective lens with respect to the laser light, a flash-ROM which stores in advance an optimum relationship between a defocus position and a spherical aberration for various optical disk thicknesses, and a control module which measures a thickness of the optical disk by detection of laser light applied to and reflected from the optical disk, and controlling the liquid crystal panel to collect the spherical aberration in accordance with the defocus position of the relationship stored in the flash-ROM for the measured optical disk thickness.
    Type: Application
    Filed: December 22, 2008
    Publication date: July 2, 2009
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Kenji TAKAGI
  • Publication number: 20090129797
    Abstract: An image forming apparatus is provided, which prevents occurrence of conveying malfunction or image failure due to variation of conveying speed caused by endurance of a fixing unit or a conveying unit, variation of using environment, or a type of a recording material. The image forming apparatus includes: a fixing unit for heating and fixing a toner image on a recording sheet (P); a secondary transferring portion for conveying the recording sheet (P) to the fixing unit; a loop sensor for detecting a degree of a loop of the recording sheet (P) generated according to a speed difference between a conveying speed of the fixing unit and a conveying speed of the secondary transferring portion; a CPU for controlling the conveying speed of the fixing unit; a fixing deliver sensor for detecting a used amount of the fixing unit; and an EEPROM for storing information on the used amount of the fixing unit detected by the fixing deliver sensor.
    Type: Application
    Filed: January 16, 2009
    Publication date: May 21, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akimichi Suzuki, Hideo Nanataki, Kenji Watanabe, Kenji Takagi
  • Publication number: 20090028590
    Abstract: A fixing apparatus includes a control circuit which controls the electrifying to a first heater so that a temperature detected by a first temperature detection portion reaches a first target temperature and controls the electrifying to a second heater so that a temperature detected by a second temperature detection portion reaches a second target temperature, when warm-up is initiated, and, when the warm-up initiated, if an initial temperature of a rotary member is below a predetermined temperature, the control circuit sets the first target temperature to a temperature value greater than the first target temperature set when the initial temperature of the rotary member is greater than the predetermined temperature and sets the second target temperature to a temperature value greater than the second target temperature set when the initial temperature of the rotary member is greater than the predetermined temperature.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 29, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideo Nanataki, Takashi Nomura, Kenji Takagi
  • Publication number: 20080166966
    Abstract: A wireless communication apparatus for performing wireless communication with another communication apparatus comprises: a contact sensor 101 operable to detect physical contact with the another communication apparatus; a short-range communication unit 102 operable to transmit management information required for a session of the wireless communication to the another communication apparatus, using a short-range communication method different from a method of the wireless communication; and a control unit 106 operable to cause the short-range communication unit 102 to transmit the management information in response to a detection of the physical contact by the contact sensor 101, and start the session with the another communication apparatus after the management information is transmitted.
    Type: Application
    Filed: December 20, 2005
    Publication date: July 10, 2008
    Inventors: Shogo Hamasaki, Kenji Hisatomi, Michiaki Matsuo, Kenji Takagi, Atsushi Saso, Mizuho Sakakibara
  • Publication number: 20080045220
    Abstract: A corresponding table between a number of a cell and a main base station (102) accommodating the cell is prepared in a node (wireless network control apparatus (101) or main base station (102)) within a radio access network. When a terminal (104) is moved and enters an overlapped area of cells (a) and (b) from an original cell (a), in the case that a main base station (102a) to which the terminal (104) was connected in the cell (a) can accommodate the cell (b) that the terminal (104) has entered, the sub base station (103b) is connected to the main base station (102a), and site diversity is performed in the main base station (102a). Thus, when site diversity is performed between main base stations in a radio access network using a base station in which a baseband processing section is separated from a radio transmission/reception section, traffic flowing between the wireless network control apparatus and the base station is reduced.
    Type: Application
    Filed: March 17, 2005
    Publication date: February 21, 2008
    Inventors: Hidenori Ishii, Kenji Takagi
  • Publication number: 20080019338
    Abstract: There are a wireless access network comprising a radio network gateway apparatus (101), radio access network control apparatus (102a), (102b) and a base stations (103a), (103b) and a terminal (104) accommodated in the wireless access network and when the terminal (104) enters into a new cell B, a packet data is transmitted from the source radio access network control apparatus (102a) to the target radio access network control apparatus (102b). Further, when the terminal (104) switches the radio access network control apparatus (102) with which the terminal (104) communicates, the target radio access network control apparatus (102b) switches a transmission line of a data to be transmitted to the terminal (104) from a wireless data to a packet data in the source radio access network control apparatus (102a), and from the source packet data to a target packet data in a synchronized manner at each timing.
    Type: Application
    Filed: March 17, 2005
    Publication date: January 24, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Hidenori ISHII, Kenji TAKAGI
  • Publication number: 20070258360
    Abstract: A radio base station device (3) comprises: a call processing control unit for transferring a signaling control signal, and transmitting a failure detection packet to a plurality of transmission paths (5) connected to a radio network controller so as to detect failure of each of the transmission paths (5); a baseband signal processing unit for transferring a user data control signal; a channel management table storing a currently set up channel and a transmission path used by the channel, as being associated with each other; and a channel management control unit for, in response to detection of failure of a transmission path (5) by the call processing control unit, receiving information indicating a state of each of the transmission paths from the call processing control unit, changing a currently set up channel to a transmission path (5) having no failure detected, and notifying the call processing control unit and the baseband signal processing unit of an address related to the transmission path (5) to which
    Type: Application
    Filed: March 18, 2005
    Publication date: November 8, 2007
    Inventors: Satoshi Senga, Hidenori Ishii, Kenji Takagi
  • Publication number: 20070238469
    Abstract: A radio network controller which includes radio resource administration means for administrating a state of the use of radio resource, rack information administration means for administrating a state of the use of resource at base band signal processing unit in base transceiver station, and control means for selecting a call frequency used in base transceiver station and allocating it to a certain rack of base band signal processing unit. In the above configuration, a percentage of loss calls which occurred due to an insufficiency of empty amount with the radio resource, or of empty amount with the base band resource, can be lowered.
    Type: Application
    Filed: December 1, 2005
    Publication date: October 11, 2007
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Yuichi Tsukamoto, Hidenori Ishii, Kenji Takagi
  • Patent number: 7208284
    Abstract: A method for measuring polyamines in erythrocytes in which a polyamine oxidase having a substrate specificity to spermine and spermidine or a polyamine oxidase having a substrate specificity to spermine only is used, an eluate in erythrocytes separated and purified from blood is reacted with these enzymes, and hydrogen peroxide formed is determined with a highly sensitive chromogen1 such as a diphenylamine-based chromogen. A method for measuring amounts of polyamines in erythrocytes easily with high precision. The method is effective for diagnosis of certain disease conditions or physiological conditions or the like.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: April 24, 2007
    Assignee: National University Corporation Nagoya University
    Inventor: Kenji Takagi
  • Publication number: 20070076546
    Abstract: An optical disc apparatus comprises a driving unit which drives an optical pickup head (PUH) for irradiating laser light onto an optical disc in such a manner that laser light is irradiated onto a plurality of positions on the optical disc, a photodetector unit which outputs a photo sense signal on the basis of the reflected light from the optical disc onto which laser light is irradiated from the PUH, a signal generating unit which generates tracking error signals of a plurality of different methods on the basis of the photo sense signal, and a tracking error signal selecting unit which selects a tracking error signal of any one of the methods on the basis of the state of the tracking error signals of the plurality of methods generated in a plurality of different positions on the disc.
    Type: Application
    Filed: September 27, 2006
    Publication date: April 5, 2007
    Inventors: Tatsuro Shimizu, Kenji Takagi
  • Publication number: 20060285523
    Abstract: Based on traffic that includes a plurality of types of calls and varies with time, resources are located efficiently in a base transceiver station that has a plurality of cards that perform baseband signal processing, and prevention of the occurrence of call loss is contrived.
    Type: Application
    Filed: May 12, 2004
    Publication date: December 21, 2006
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Hidenori Ishii, Toshiaki Nagasawa, Kenji Takagi, Go Nakano
  • Publication number: 20060217123
    Abstract: It is an object to achieve both improvements in system capacity and load distribution, by allocating resources so as not to generate the call loss as possible. A protected call is set, the resource allocating scheme is varied according to the resource state of each card, call allocating processing is performed to distribute loads at the low traffic time, while being performed to use up as possible resources of a card with a high in-use rate at the high traffic time, and it is thereby possible to obtain the advantageous effect of using resources with high efficiency to enable the load distribution over signal processing cards without generating the call loss as possible.
    Type: Application
    Filed: March 18, 2004
    Publication date: September 28, 2006
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Hidenori Ishii, Kenji Takagi, Go Nakano, Tsutomu Ishii
  • Publication number: 20050277166
    Abstract: A method for measuring polyamines in erythrocytes in which a polyamine oxidase having a substrate specificity to spermine and spermidine or a polyamine oxidase having a substrate specificity to spermine only is used, an eluate in erythrocytes separated and purified from blood is reacted with these enzymes, and hydrogen peroxide formed is determined with a highly sensitive chromogen such as a diphenylamine-based chromogen. There is provided a method for measuring amounts of polyamines in erythrocytes easily with high precision. The method is effective for diagnosis of certain disease conditions or physiological conditions or the like of subjects.
    Type: Application
    Filed: December 6, 2004
    Publication date: December 15, 2005
    Applicant: National University Corporation Nagoya University
    Inventor: Kenji Takagi
  • Publication number: 20050276426
    Abstract: An information processing apparatus is connected to a sound output device for outputting sound based on digital audio data. The information processing apparatus includes the following elements. A first receiver receives setting data for setting a volume of sound output from the sound output device, the volume being set by a function implemented by a first computer executing a first program. A second receiver receives a setting signal for setting a volume of sound output from the sound output device, the volume being supplied from a setting unit provided for the sound output device. A calculator calculates first volume control data that controls the volume of sound output from the sound output device based on the setting data and the setting signal, the volume being controlled by a second computer executing a second program. A first output unit outputs the first volume control data to the sound output device.
    Type: Application
    Filed: April 28, 2005
    Publication date: December 15, 2005
    Inventors: Kenichi Ono, Kenji Takagi, Yuichiro Sasabe, Keisuke Koide, Kiyoshi Hasegawa
  • Publication number: 20050107123
    Abstract: A base transceiver station enabling increases in the number of calls that can be accommodated at the same time. In the apparatus, each of signal processing cards 103-1 to 103-M has a predetermined number of resources to perform baseband processing on a call. Group creating section 108 compares the number of required resources of a call with a predetermined number, and sorts the call to a group corresponding to a result of the comparison. Resource control section 104 allocates a call to connect to either of signal processing cards 103-1 to 103-M. Further, resource control section 104 reallocates the call to another signal processing card of signal processing cards 103-1 to 103-M, according to the group to which the call, allocated to either of signal processing cards 103-1 to 103-M, is sorted.
    Type: Application
    Filed: October 19, 2004
    Publication date: May 19, 2005
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hidenori Ishii, Kenji Takagi, Go Nakano