Patents by Inventor Takahisa Aoyama

Takahisa Aoyama 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: 9432165
    Abstract: A base station is disclosed, including an information size adjusting section configured to adjust a size of control information based on a first basic information size of control information mapped on a user equipment (UE) specific search space in a first component carrier. The base station also includes a transmitter configured to transmit the control information mapped on the UE specific search space. A first determination method for determining the first basic information size is different from a second determination method for determining a second basic information size of control information mapped on a common search space in the first component carrier. The first determination method for determining the first basic information size is different from a third determination method for determining a third basic information size of control information mapped on a search space in a second component carrier that is different from the first component carrier.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 30, 2016
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Daichi Imamura, Takahisa Aoyama
  • Publication number: 20160249270
    Abstract: When detecting occurrence of an event for transmitting a measurement report of a radio condition of a cell at a frequency set for a base station apparatus, to the base station apparatus (3) communicating with a terminal apparatus (2), the terminal apparatus (2) in a wireless communication system (1) creates a measurement report including information indicating radio conditions of cells at a frequency at which the event occurred and at another different frequency. The base station apparatus (3) controls whether or not to perform handover of the terminal apparatus (2) to another cell, on the basis of the measurement report transmitted from the terminal apparatus (2). Thereby, there is provided a wireless communication system in which a base station apparatus and the terminal apparatus are communicable with each other using multiple frequencies, the wireless communication system being capable of shortening time required for handover.
    Type: Application
    Filed: April 25, 2016
    Publication date: August 25, 2016
    Inventors: Takashi Tamura, Takahisa Aoyama, Jun Hirano
  • Publication number: 20160226615
    Abstract: A base station is disclosed, including an information size adjusting section configured to adjust a size of control information based on a first basic information size of control information mapped on a user equipment (UE) specific search space in a first component carrier. The base station also includes a transmitter configured to transmit the control information mapped on the UE specific search space. A first determination method for determining the first basic information size is different from a second determination method for determining a second basic information size of control information mapped on a common search space in the first component carrier. The first determination method for determining the first basic information size is different from a third determination method for determining a third basic information size of control information mapped on a search space in a second component carrier that is different from the first component carrier.
    Type: Application
    Filed: April 8, 2016
    Publication date: August 4, 2016
    Inventors: Seigo Nakao, Daichi Imamura, Takahisa Aoyama
  • Publication number: 20160227505
    Abstract: The invention relates to methods for reporting on downlink timings by a mobile terminal in a mobile communication system. In order to allow for an aggregation access point to obtain information on propagation delay differences of downlink transmissions on aggregated serving cells, the invention suggests the mobile terminal to report timing information based on reception time difference information for a the target/reference cell. The mobile terminal performs measurements relating to transmission and/or reception time differences on the target/reference cell, and reports same to the eNodeB. The eNodeB compares the measurement result to a predefined maximum propagation delay time difference. Alternatively, the mobile terminal performs the measurements, compares same to the predefined maximum propagation delay time difference and then report the comparison result to the eNodeB.
    Type: Application
    Filed: April 11, 2016
    Publication date: August 4, 2016
    Inventors: Joachim Loehr, Hidetoshi Suzuki, Takashi Tamura, Martin Feuersaenger, Christian Wengerter, Takahisa Aoyama
  • Patent number: 9407413
    Abstract: A wireless communication device used in a communication system that utilizes a coordinated multiple-point technique has a determination section that determines another wireless communication device which performs coordinated multiple-point with respect to a wireless communication terminal; an allocation determination section that determines for a predetermined number of sub-frames a proportion of multiple-data-transmission automatic repeat request control to identical-data-transmission automatic repeat request control; an automatic repeat request control section that performs multiple-data-transmission automatic repeat request control; and an automatic repeat request control section that performs identical-data-transmission automatic repeat request control.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: August 2, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Hidenori Matsuo, Takahisa Aoyama, Takashi Tamura
  • Patent number: 9402255
    Abstract: The invention relates methods for time aligning uplink transmissions by a mobile terminal in a mobile communication system, and to methods for performing a handover of a mobile terminal to a target aggregation access point. The invention is also providing apparatus and system for performing these methods, and computer readable media the instructions of which cause the apparatus and system to perform the methods described herein. In order to allow for aligning the timing of uplink transmissions on uplink component carriers, where different propagation delays are imposed on the transmissions on the uplink component carriers, the inventions suggests to time align the uplink component carriers based on a reference time alignment of a reference cell and a reception time difference or propagation delay difference between the downlink transmissions in the reference cell and the other radio cells, the uplink component carriers of which need to be time aligned.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: July 26, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Joachim Löhr, Christian Wengerter, Martin Feuersänger, Takashi Tamura, Hidetoshi Suzuki, Takahisa Aoyama
  • Publication number: 20160198357
    Abstract: In a wireless communication terminal in a wireless communication system for performing a control not to transmit signals, or to transmit signals with a reduction in a transmission power by a part of radio resources for a downlink signal in a cell provided by a base station, the terminal receives control information in generating a report related to a measurement result of the cell provided by the base station, monitors a state of a radio link with an own cell, and performs measurement on reception of the downlink signal. If an instruction for restricting the measurement to a part of the radio resources is included in the control information from the base station after the radio link failure occurs, the terminal generates and transmits a radio link failure report including the measurement result in the radio resources as instructed when the radio link failure occurs.
    Type: Application
    Filed: March 15, 2016
    Publication date: July 7, 2016
    Inventors: Takashi Tamura, Takahisa Aoyama, Hidenori Matsuo
  • Patent number: 9380547
    Abstract: Provided are a base station, a terminal, a band allocation method, and a downlink data communication method in which a mapping method for synchronization signals and report signals is implemented with high resource usage efficiency when a first system in which an independent single communication is allocated to a unit band co-exists with a second system in which a plurality of unit bands can be allocated to a single communication. In a base station, an OFDM signal generation unit maps primary synchronization channel (P-SCH), secondary synchronization channel (S-SCH), primary broadcast channel (P-BCH), and dynamic broadcast channel (D-BCH), which can be decoded by both an LTE terminal and an LTE+ terminal, to some of a plurality of unit bands. The OFDM signal generation unit also maps D-BCH+, which can be decoded only by an LTE+ terminal, to all of the plurality of unit bands to produce a multiplexed transmission signal.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: June 28, 2016
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Hidetoshi Suzuki, Akihiko Nishio, Takahisa Aoyama, Katsuhiko Hiramatsu
  • Publication number: 20160165501
    Abstract: A terminal apparatus (1) which is a radio transmitting/receiving apparatus receives, from a femto cell base station (home eNB), a pilot channel signal for reception quality measurement and a synchronization channel signal for synchronization. The terminal apparatus (1) has a whitelist stored therein indicative of an accessible femto cell, and determines whether or not a CSG cell of handover destination is accessible based on a PCI of the CSG cell acquired from the synchronization channel and the whitelist. The terminal apparatus (1) then adds the PCI and a CGI to a measurement report for reception quality, and transmits the measurement report to a macro eNB (base station apparatus (2)). In this way, it is possible to suppress wasteful signaling and prevent unnecessary resources from being reserved even when two or more CSG cells that use the same PCI are present in the macro cell.
    Type: Application
    Filed: December 1, 2015
    Publication date: June 9, 2016
    Inventors: Chie Ishida, Takahisa Aoyama
  • Patent number: 9351220
    Abstract: When detecting occurrence of an event for transmitting a measurement report of a radio condition of a cell at a frequency set for a base station apparatus, to the base station apparatus (3) communicating with a terminal apparatus (2), the terminal apparatus (2) in a wireless communication system (1) creates a measurement report including information indicating radio conditions of cells at a frequency at which the event occurred and at another different frequency. The base station apparatus (3) controls whether or not to perform handover of the terminal apparatus (2) to another cell, on the basis of the measurement report transmitted from the terminal apparatus (2). Thereby, there is provided a wireless communication system in which a base station apparatus and the terminal apparatus are communicable with each other using multiple frequencies, the wireless communication system being capable of shortening time required for handover.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: May 24, 2016
    Assignee: SUN PATENT TRUST
    Inventors: Takashi Tamura, Takahisa Aoyama, Jun Hirano
  • Patent number: 9344985
    Abstract: The invention relates to methods for reporting on downlink timings by a mobile terminal in a mobile communication system. In order to allow for an aggregation access point to obtain information on propagation delay differences of downlink transmissions on aggregated serving cells, the invention suggests the mobile terminal to report timing information based on reception time difference information for a the target/reference cell. The mobile terminal performs measurements relating to transmission and/or reception time differences on the target/reference cell, and reports same to the eNodeB. The eNodeB compares the measurement result to a predefined maximum propagation delay time difference. Alternatively, the mobile terminal performs the measurements, compares same to the predefined maximum propagation delay time difference and then report the comparison result to the eNodeB.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: May 17, 2016
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Joachim Loehr, Hidetoshi Suzuki, Takashi Tamura, Martin Feuersaenger, Christian Wengerter, Takahisa Aoyama
  • Publication number: 20160128035
    Abstract: Provided are a radio terminal device, a radio base station device, and a channel signal forming method which can prevent quality degradation of the downlink resource allocation information by reducing the frequency of the zero information addition process to the downlink resource allocation information when executing communication using an uplink unit band and multiple downlink unit bands correlated to the uplink unit band. A base station includes: a PDCCH generation unit which includes the uplink allocation information relating to the uplink unit band only in some of the channel signals formed for each of the downlink unit bands; and a padding unit which adds zero information to the downlink allocation information only in the selected some channel signals having the bandwidth of the corresponding downlink unit band smaller than that of the uplink unit band until the downlink allocation information size becomes equal to the uplink allocation information size.
    Type: Application
    Filed: December 11, 2015
    Publication date: May 5, 2016
    Inventors: Seigo Nakao, Akihiko Nishio, Daichi Imamura, Takahisa Aoyama
  • Patent number: 9319917
    Abstract: In a wireless communication terminal in a wireless communication system for performing a control not to transmit signals, or to transmit signals with a reduction in a transmission power by a part of radio resources for a downlink signal in a cell provided by a base station, the terminal receives control information in generating a report related to a measurement result of the cell provided by the base station, monitors a state of a radio link with an own cell, and performs measurement on reception of the downlink signal. If an instruction for restricting the measurement to a part of the radio resources is included in the control information from the base station after the radio link failure occurs, the terminal generates and transmits a radio link failure report including the measurement result in the radio resources as instructed when the radio link failure occurs.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: April 19, 2016
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takashi Tamura, Takahisa Aoyama, Hidenori Matsuo
  • Patent number: 9266986
    Abstract: The present invention provides a chlorotrifluoroethylene copolymer endowed with stress cracking resistance, chemical resistance and thermal stability. The present invention is a chlorotrifluoroethylene copolymer constituted of chlorotrifluoroethylene unit, tetrafluoroethylene unit and a monomer [A] unit derived from a monomer [A] copolymerizable with chlorotrifluoroethylene and tetrafluoroethylene, wherein the sum of chlorotrifluoroethylene unit and the tetrafluoroethylene unit amounts to 90 to 99.9 mole percent and the monomer [A] unit amounts to 0.1 to 10 mole percent.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: February 23, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takeshi Shimono, Takahisa Aoyama, Hiroshi Torimae, Takahiro Kitahara
  • Patent number: 9240873
    Abstract: Provided are a radio terminal device, a radio base station device, and a channel signal forming method which can prevent quality degradation of the downlink source allocation information by reducing the frequency of the zero information addition process to the downlink resource allocation information when executing communication using an uplink unit band and a plurality of downlink unit bands correlated to the uplink unit band. A base station can execute communication using the uplink unit band and a plurality of downlink unit bands correlated to the uplink unit band.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: January 19, 2016
    Assignee: Panasonic Intellctual Property Corporation of America
    Inventors: Seigo Nakao, Akihiko Nishio, Daichi Imamura, Takahisa Aoyama
  • Publication number: 20160007367
    Abstract: A communication terminal adjusts the transmission timing of data transmitted to a base station so that the base station can receive the data within a predetermined delay time. The communication terminal includes a reception section 701 for receiving priority of MAC control information transmitted from the base station, a priority control section 703 for defining the relationship between the priority of the MAC control information and priority assigned to DRB and SRB, and a transmission message generation section 704 for controlling so as to transmit information having a high priority early in accordance with the relationship between the priorities defined by the priority control section 703. According to the communication terminal, a comparison is made between the priority of the MAC control information and the priority assigned to the DRB and the SRB, whereby it is made possible to control what information is to be transmitted as desired.
    Type: Application
    Filed: September 2, 2015
    Publication date: January 7, 2016
    Inventors: Takahisa AOYAMA, Joachim LOEHR
  • Patent number: 9232450
    Abstract: A terminal apparatus (1) which is a radio transmitting/receiving apparatus receives, from a femto cell base station (home eNB), a pilot channel signal for reception quality measurement and a synchronization channel signal for synchronization. The terminal apparatus (1) has a whitelist stored therein indicative of an accessible femto cell, and determines whether or not a CSG cell of handover destination is accessible based on a PCI of the CSG cell acquired from the synchronization channel and the whitelist. The terminal apparatus (1) then adds the PCI and a CGI to a measurement report for reception quality, and transmits the measurement report to a macro eNB (base station apparatus (2)). In this way, it is possible to suppress wasteful signaling and prevent unnecessary resources from being reserved even when two or more CSG cells that use the same PCI are present in the macro cell.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: January 5, 2016
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Chie Ishida, Takahisa Aoyama
  • Patent number: 9226256
    Abstract: Methods for detaching a mobile terminal from a mobile communication network. Furthermore, the invention also relates to a mobile terminal and a mobility management entity that perform these methods. The invention is inter alia applicable to a 3GPP LTE-A system following the Evolved Packet System (EPS) architecture. The invention proposes that the detach procedure of a mobile terminal is triggered by the mobile terminal being transferred into idle state. The mobility management entity can trigger the detach procedure in response to this event. The detach procedure may be deferred by a given time span. A detach timer may be configured in the mobile terminal and the mobility entity for this purpose, and upon expiry of the detach timer in the mobile terminal and the mobility management entity, both silently delete the context information related to the mobile terminal's user plane and control plane to detach the mobile terminal.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: December 29, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Genadi Velev, Jens Bachmann, Takahisa Aoyama, Shinkichi Ikeda
  • Patent number: 9204415
    Abstract: The present invention introduces system, apparatus and method that reduce wastage of network resources and mobile phone resources. The mobile phone would indicate its status in a tracking area update message when it is connected to the device. The network can then understand from the status indication that the mobile phone is capable of delivering packets to the device, and would thus allow the server to initiate communications. An absence of the status indication would imply the mobile phone is not capable of delivering packets to the device, and the network would then disallow the server to initiate communications.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: December 1, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Chan Wah Ng, Hong Cheng, Shinkichi Ikeda, Takahisa Aoyama, Jens Bachmann, Sampath Swaroop Kumar, Terufumi Takada, Pek Yew Tan
  • Publication number: 20150304972
    Abstract: Provided are a base station, a terminal, a band allocation method, and a downlink data communication method in which a mapping method for synchronization signals and report signals is implemented with high resource usage efficiency when a first system in which an independent single communication is allocated to a unit band co-exists with a second system in which a plurality of unit bands can be allocated to a single communication. In a base station, an OFDM signal generation unit maps primary synchronization channel (P-SCH), secondary synchronization channel (S-SCH), primary broadcast channel (P-BCH), and dynamic broadcast channel (D-BCH), which can be decoded by both an LTE terminal and an LTE+ terminal, to some of a plurality of unit bands. The OFDM signal generation unit also maps D-BCH+, which can be decoded only by an LTE+ terminal, to all of the plurality of unit bands to produce a multiplexed transmission signal.
    Type: Application
    Filed: April 27, 2015
    Publication date: October 22, 2015
    Inventors: Seigo NAKAO, Hidetoshi SUZUKI, Akihiko NISHIO, Takahisa AOYAMA, Katsuhiko HIRAMATSU