Patents by Inventor Takaaki Sato

Takaaki Sato 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: 7236787
    Abstract: When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: June 26, 2007
    Assignee: NTT Mobile Communications Network, Inc.
    Inventors: Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama
  • Publication number: 20070127556
    Abstract: A RAKE reception device capable of allocating an appropriate number of fingers to a channel. In this device, a selection control section (301) sets a finger (304) allocated to the channel from the channel communication state and a control signal based on this setting is output to a synchronization processing section (302) and to a selection switch (303). According to the control signal, the synchronization processing section (302) detects a path and a spread code phase in a reception signal and allocates the detected path to the finger (304) which has been set. The finger (304) which has been set de-spreads the signal of the path allocated and performs coherent detection. According to the control signal, the selection switch (303) switches the connection between the finger (304) and a maximum ratio combining section (307) so that the output from the finger (304) is output to the maximum ratio combining section (307).
    Type: Application
    Filed: February 3, 2004
    Publication date: June 7, 2007
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventor: Takaaki Sato
  • Patent number: 7193978
    Abstract: A radio channel setting control method for communications between a base-station apparatus and a mobile-station apparatus in a mobile communications system employing a CDMA scheme comprising the steps of: a) determining whether or not a spread code used for the communications can be allocated; b) determining whether or not a predetermined hardware device can be allocated; c) determining whether or not a radio resource can be allocated; d) setting the radio channel between the base-station apparatus and mobile-station apparatus when it is determined that the spread code, predetermined hardware device and radio resource can be allocated.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: March 20, 2007
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihiro Ishikawa, Seizo Onoe, Takaaki Sato, Yoshitaka Hiramoto, Takehiro Nakamura
  • Publication number: 20070058589
    Abstract: A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and maximum radio branch number of the mobile station, when the mobile station detects the plurality of addition branch candidates and deletion branch candidates. The mobile station inserts a plurality of addition branch candidates and deletion branch candidates, that is, all the DHO candidates into one handover trigger signal, and notifies the network. The addition branch candidates are put into addition information parameters in the handover trigger signal, and the deletion branch candidates are put into deletion information parameters. To simplify processing on the network side, the network side separates the addition branch candidates from the deletion branch candidates, and carries out sequential processing of them independently.
    Type: Application
    Filed: October 31, 2006
    Publication date: March 15, 2007
    Applicant: NTT DoCoMo, Inc.
    Inventors: Tomoyuki Ohtani, Motoshi Tamura, Takaaki Sato
  • Publication number: 20070054266
    Abstract: A chemical sensor utilizing a chemical receptor (for example, one stimulating the sense of taste or smell) is provided. More specifically speaking, such a receptor is introduced into cells and the cells are immobilized on a support to form a chip. This chip is then employed as a component of a sensor. This sensor shows a reaction almost the same as the body's perception of the taste or smell or sense, thereby enabling analysis. Thus, it is also usable as an artificial sensory organ. Moreover, this sensor is usable in diagnosis, which imparts a high industrial usefulness to it.
    Type: Application
    Filed: May 28, 2003
    Publication date: March 8, 2007
    Applicant: NATIONAL INSTITUTE of ADVANCED INDUSTRIAL SCIENCE and TECHNOLOGY
    Inventors: Takaaki Sato, Junzo Hirono, Hiroshi Hamana, Masato Miyake, Tomohiro Yoshikawa, Jun Miyake
  • Patent number: 7187929
    Abstract: A radio link controlling apparatus configured to maintain communication quality at the time of setting a communication line. The radio link controlling apparatus includes a communication request receiving device for receiving a communication request including information about a service type, transmitted from a mobile terminal; a communication start timing determining device for determining communication start timing by the communication channel based on the information about the service type in the communication request received by the communication request receiving device; a control signal generating device for generating a control signal including the information of the communication start timing determined by the communication start timing determining device; and a control signal transmitting device for transmitting the control signal generated by the control signal generating device, to the mobile terminal by the control channel.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: March 6, 2007
    Assignee: NTT DoCoMo, Inc.
    Inventors: Kazunori Obata, Takaaki Sato
  • Publication number: 20060293054
    Abstract: A radio control apparatus 10 is provided with a call management system 18 configured so that, when a mobile station in communication with a first base station by a first communication link requests diversity handover with a second base station, the call management system 18 retrieves a potential information rate that is not higher than an information rate of the first communication link and that is highest, from an information rate table 31 storing information about information rates of communication links securable in the second base station under other radio control apparatus; and a link management system 20 configured so that, when the potential information rate is lower than that of the first communication link, the link management system 20 instructs the first base station to change the first communication link to a second communication link communicable at the potential information rate; the call management system 18 requests the other radio control apparatus to secure a third communication link communi
    Type: Application
    Filed: November 21, 2005
    Publication date: December 28, 2006
    Applicant: NTT DoCoMo, Inc
    Inventors: Kazunori Obata, Takaaki Sato
  • Publication number: 20060264207
    Abstract: When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover.
    Type: Application
    Filed: April 5, 2006
    Publication date: November 23, 2006
    Applicant: NTT Mobile Communications Network, Inc.
    Inventors: Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama
  • Publication number: 20060251038
    Abstract: When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover.
    Type: Application
    Filed: April 6, 2006
    Publication date: November 9, 2006
    Applicant: NTT Mobile Communications Network, Inc
    Inventors: Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama
  • Publication number: 20060199578
    Abstract: When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover.
    Type: Application
    Filed: March 28, 2006
    Publication date: September 7, 2006
    Applicant: NTT Mobile Communications Network, Inc.
    Inventors: Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama
  • Publication number: 20060194583
    Abstract: When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover.
    Type: Application
    Filed: March 30, 2006
    Publication date: August 31, 2006
    Applicant: NTT Mobile Communications Network, Inc.
    Inventors: Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama
  • Publication number: 20060178167
    Abstract: When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover.
    Type: Application
    Filed: April 4, 2006
    Publication date: August 10, 2006
    Applicant: NTT Mobile Communications Network, Inc.
    Inventors: Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama
  • Publication number: 20060128386
    Abstract: A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and maximum radio branch number of the mobile station, when the mobile station detects the plurality of addition branch candidates and deletion branch candidates. The mobile station inserts a plurality of addition branch candidates and deletion branch candidates, that is, all the DHO candidates into one handover trigger signal, and notifies the network. The addition branch candidates are put into addition information parameters in the handover trigger signal, and the deletion branch candidates are put into deletion information parameters. To simplify processing on the network side, the network side separates the addition branch candidates from the deletion branch candidates, and carries out sequential processing of them independently.
    Type: Application
    Filed: February 2, 2006
    Publication date: June 15, 2006
    Inventors: Tomoyuki Ohtani, Motoshi Tamura, Takaaki Sato
  • Patent number: 7035639
    Abstract: A radio control apparatus 10 is provided with a call management system 18 configured so that, when a mobile station in communication with a first base station by a first communication link requests diversity handover with a second base station, the call management system 18 retrieves a potential information rate that is not higher than an information rate of the first communication link and that is highest, from an information rate table 31 storing information about information rates of communication links securable in the second base station under other radio control apparatus; and a link management system 20 configured so that, when the potential information rate is lower than that of the first communication link, the link management system 20 instructs the first base station to change the first communication link to a second communication link communicable at the potential information rate; the call management system 18 requests the other radio control apparatus to secure a third communication link communi
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: April 25, 2006
    Assignee: NTT DoCoMo, Inc.
    Inventors: Kazunori Obata, Takaaki Sato
  • Publication number: 20050255807
    Abstract: A base station apparatus which transmits packets always using a modulation and coding scheme suitable for channel quality, and increases the throughput in the radio communication system. In the apparatus, radio reception section 104 receives a radio transmission signal including channel quality information transmitted from a communication terminal apparatus via reception antenna 102, and performs predetermined radio reception processing. Demodulation section 106 demodulates the radio transmission signal subjected to the radio reception processing, and extracts the channel quality information. A setting unit is comprised of channel quality information storage section 108, judgment section 110 and MCS determination section 112, and sets a modulation and coding scheme based on a plurality of received pieces of channel quality information.
    Type: Application
    Filed: March 8, 2004
    Publication date: November 17, 2005
    Inventors: Katsuhiko Araki, Takaaki Sato
  • Publication number: 20050246963
    Abstract: A weather strip includes a trim body having a generally U-shaped cross section, a hollow seal portion that protrudes from an outside surface of the trim body, and a holding lip formed on the trim body so as to extend from an inside surface of the trim body toward the inside of the trim body. The weather strip is mounted on the vehicle body such that the trim body is held by a flange provided at a periphery of a door opening of a motor vehicle. The weather strip is formed by extrusion molding such that the length of the holding lip is changed in a plurality of steps in accordance with the thickness of the flange.
    Type: Application
    Filed: July 12, 2005
    Publication date: November 10, 2005
    Inventors: Harumi Kogiso, Kiminori Mine, Masaki Ohashi, Takaaki Sato, Tomofumi Nishikawa, Masahiro Nozaki, Toshihiro Nahara
  • Patent number: 6950423
    Abstract: When packet sending and receiving apparatus 21 sets a connection, timing control apparatus 22 generates a timing information Tf as the packet is dispersed equivalently. Timing control apparatus 22 notices the timing information Tf to packet sending and receiving apparatus 21 and base station 3. Packet sending and receiving apparatus 21 carries out a packet generating processing in accordance with a frame offset value which is indicated by the timing information Tf. Therefore, the packets in which a packet transmission timing is averaged in a packet transmission period arrives to packet multiplex apparatus 23. Consequently, it is possible to decrease a waiting time of the packet multiplex transmission. Therefore, it is possible to use efficiency a transmission link L1, while being satisfied the required service quality.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: September 27, 2005
    Assignee: NTT Mobile Communications Newtork, Inc.
    Inventors: Hiroshi Kawakami, Motoshi Tamura, Takaaki Sato
  • Publication number: 20050194574
    Abstract: There are provided aluminum elements covered on their surfaces with a coating film free from harmful hexavalent chromium compounds and fluorine compounds. Particularly, aluminum dicast and aluminum cast materials having excellent paint adherence and corrosion resistance are provided. The coating film for aluminum elements comprises (i) chromium, (ii) zinc and (iii) cobalt and/or titanium with 95% by mass or more of said chromium being a trivalent chromium.
    Type: Application
    Filed: February 24, 2005
    Publication date: September 8, 2005
    Inventors: Masaaki Yamamuro, Takaaki Sato, Atsushi Kaneko
  • Patent number: 6939679
    Abstract: Agents for use in screening of medicaments for treatment, prevention and/or diagnosis of apoptosis associated diseases are provided which comprise an apoptosis related protein binding to NADE (p76NTR-associated cell death executor) or a DNA encoding said protein.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: September 6, 2005
    Assignee: Riken
    Inventors: Takaaki Sato, Shinji Irie
  • Patent number: 6935072
    Abstract: A weather strip includes a trim body having a generally U-shaped cross section, a hollow seal portion that protrudes from an outside surface of the trim body, and a holding lip formed on the trim body so as to extend from an inside surface of the trim body toward the inside of the trim body. The weather strip is mounted on the vehicle body such that the trim body is held by a flange provided at a periphery of a door opening of a motor vehicle. The weather strip is formed by extrusion molding such that the length of the holding lip is changed in a stepped manner in accordance with the thickness of the flange.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: August 30, 2005
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Harumi Kogiso, Kiminori Mine, Masaki Ohashi, Takaaki Sato, Tomofumi Nishikawa, Masahiro Nozaki, Toshihiro Nahara