Patents by Inventor Tetsu Ikeda

Tetsu Ikeda 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: 20220263557
    Abstract: This present disclosure provides a mechanism to classify CSI report(s) into valid/partially valid/invalid CSI report(s) by defining a new CSI evaluation methodology. The present disclosure also introduces a new UE behaviour of sending different (valid/partially valid/invalid) type of CSI report to inform the gNB about the TCI state known status at the UE. The present disclosure also introduces an implicit or explicit signalling method to inform the type of CSI report to the gNB. The present disclosure also discloses new UE behaviour of skipping CSI reports between partially valid/invalid CSI report and valid CSI report during TCI state switching/SCell activation.
    Type: Application
    Filed: June 18, 2020
    Publication date: August 18, 2022
    Applicant: NEC Corporation
    Inventors: Venkatarao GONUGUNTLA, Hisashi FUTAKI, Tetsu IKEDA, Sadafuku HAYASHI
  • Publication number: 20220264448
    Abstract: The present disclosure provides an apparatus, and a method for optimizing user equipment (UE) power consumption on activated Secondary Cells during dormancy and non-dormancy behavior based on the first configuration and second configuration information as provided by radio station.
    Type: Application
    Filed: March 22, 2021
    Publication date: August 18, 2022
    Applicant: NEC Corporation
    Inventors: Venkatarao GONUGUNTLA, Hisashi FUTAKI, Tetsu IKEDA, Sadafuku HAYASHI
  • Publication number: 20220182980
    Abstract: The present disclosure discloses a method for a User Equipment (UE). The method comprises: establishing a communication session with a network node for transmission of data; receiving a configuration message indicating information for one or more of transmission slots for a plurality of logical channels; setting up for transmission of data based on the received configuration message to select one or more logical channels of the plurality of logical channels; and prioritizing the selection of plurality of logical channels when the UE is indicative of initiation of transmission of data.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 9, 2022
    Applicant: NEC Corporation
    Inventors: Venkatarao GONUGUNTLA, Hisashi FUTAKI, Tetsu IKEDA, Sadafuku HAYASHI
  • Patent number: 8923874
    Abstract: A method for operating a WiMAX femtocell base station, wherein the femtocell base station has an active operational mode, in which the radio interface subsystem of the femtocell base station is fully power supplied, is characterized in that a power saving mode with reduced radio interface activity is provided, wherein the femtocell base station is enabled to transit between the active operation mode and the power saving mode. Furthermore, a corresponding femtocell base station for deployment in a WiMAX network is disclosed.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: December 30, 2014
    Assignee: NEC Corporation
    Inventors: Andreas Maeder, Jun Zhou, Michael Einhaus, Yuefeng Zhou, Tetsu Ikeda, Linghang Fan
  • Publication number: 20140155077
    Abstract: A method for operating a WiMAX femtocell base station, wherein the femtocell base station has an active operational mode, in which the radio interface subsystem of the femtocell base station is fully power supplied, is characterized in that a power saving mode with reduced radio interface activity is provided, wherein the femtocell base station is enabled to transit between the active operation mode and the power saving mode. Furthermore, a corresponding femtocell base station for deployment in a WiMAX network is disclosed.
    Type: Application
    Filed: February 10, 2014
    Publication date: June 5, 2014
    Applicant: NEC Corporation
    Inventors: Andreas MAEDER, Jun ZHOU, Michael EINHAUS, Yuefeng ZHOU, Tetsu IKEDA, Linghang FAN
  • Patent number: 8688133
    Abstract: A method for operating a WiMAX femtocell base station, wherein the femtocell base station has an active operational mode, in which the radio interface subsystem of the femtocell base station is fully power supplied, is characterized in that a power saving mode with reduced radio interface activity is provided, wherein the femtocell base station is enabled to transit between the active operation mode and the power saving mode. Furthermore, a corresponding femtocell base station for deployment in a WiMAX network is disclosed.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: April 1, 2014
    Assignee: NEC Corporation
    Inventors: Andreas Maeder, Jun Zhou, Michael Einhaus, Yuefeng Zhou, Tetsu Ikeda, Linghang Fan
  • Patent number: 8503366
    Abstract: A radio communication system includes a plurality of radio communication devices that transmit and receive a subframe as a unit. Each of the plurality of radio communication devices adds a cyclic prefix to the head of the effective symbol of each OFDM symbol that makes up a subframe and adds a postfix to the tail of the effective symbol of the last OFDM symbol of the subframe.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: August 6, 2013
    Assignee: NEC Corporation
    Inventor: Tetsu Ikeda
  • Patent number: 8446814
    Abstract: A radio communication system according to the present invention has a plurality of radio communication devices that transmit and receive subframes one by one. Each of the plurality of radio communication devices includes a subframe generation unit that generates the subframe with a plurality of symbols and causes an effective symbol length of a last symbol of the subframe to be 1/X (where X is an integer equal to or greater than 2) and a transmission unit that transmits the subframe to another radio communication device.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: May 21, 2013
    Assignee: NEC Corporation
    Inventor: Tetsu Ikeda
  • Patent number: 8442002
    Abstract: For enhancing user throughput and coverage within a multi-cell radio system a method for operating a multi-cell radio system, especially an OFDMA-based radio system including a plurality of base stations, wherein different frequency reuse factors are used within different reuse zones of one cell by a fractional frequency reuse (FFR) scheme, the method includes the following steps: allocating a size or resource to the different reuse zones, and allocating users into different reuse zones. Further, a multi-cell radio system is described, preferably for carrying out the above mentioned method.
    Type: Grant
    Filed: September 7, 2009
    Date of Patent: May 14, 2013
    Assignees: NEC Europe Ltd., NEC Corporation
    Inventors: Jun Zhou, Linghang Fan, Yuefeng Zhou, Tetsu Ikeda
  • Patent number: 8412221
    Abstract: A method for interference mitigation for femtocell base stations of a WiMAX network, wherein the femtocell base station is located within the transmission range of at least one macrocell base station and/or at least one other femtocell base station, is characterized in that the femtocell base station performs downlink measurements to detect neighboring macrocell and/or femtocell base stations and reports results of the downlink measurements to at least one higher layer network controller, wherein the network controller allocates transmission parameters to the WiMAX femtocell base stations on the basis of at least the reported measurement results and the current resource occupation in the network.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: April 2, 2013
    Assignees: NEC Europe Ltd., NEC Corporation
    Inventors: Linghang Fan, Jun Zhou, Andreas Maeder, Tetsu Ikeda
  • Publication number: 20120021735
    Abstract: A method for operating a WiMAX femtocell base station, wherein the femtocell base station has an active operational mode, in which the radio interface subsystem of the femtocell base station is fully power supplied, is characterized in that a power saving mode with reduced radio interface activity is provided, wherein the femtocell base station is enabled to transit between the active operation mode and the power saving mode. Furthermore, a corresponding femtocell base station for deployment in a WiMAX network is disclosed.
    Type: Application
    Filed: October 27, 2009
    Publication date: January 26, 2012
    Applicant: NEC CORPORATION
    Inventors: Andreas Maeder, Jun Zhou, Michael Einhaus, Yuefeng Zhou, Tetsu Ikeda, Linghang Fan
  • Patent number: 8095160
    Abstract: An intermediate station and method for facilitating handover in a multi-hop communications system is disclosed. The method may include receiving a handover trigger, finding a target station to receive handover, determining whether the handover requires a timing change, wherein if it is determined that a preamble and broadcast timing change for one or more downstream stations is required, estimating when the handover will take place, instructing the one or more downstream stations to resynchronize, and performing the handover to the target station.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: January 10, 2012
    Assignee: Motorola Solutions, Inc.
    Inventors: Ryutaro Hamasaki, Masahito Asa, Tetsu Ikeda, Mohsin M Mollah
  • Publication number: 20110287775
    Abstract: A method for interference mitigation for femtocell base stations of a WiMAX network, wherein the femtocell base station is located within the transmission range of at least one macrocell base station and/or at least one other femtocell base station, is characterized in that the femtocell base station performs downlink measurements to detect neighboring macrocell and/or femtocell base stations and reports results of the downlink measurements to at least one higher layer network controller, wherein the network controller allocates transmission parameters to the WiMAX femtocell base stations on the basis of at least the reported measurement results and the current resource occupation in the network.
    Type: Application
    Filed: January 14, 2010
    Publication date: November 24, 2011
    Applicants: NEC CORPORATION, NEC EUROPE LTD.
    Inventors: Linghang Fan, Jun Zhou, Andreas Maeder, Tetsu Ikeda
  • Publication number: 20110222496
    Abstract: For enhancing user throughput and coverage within a multi-cell radio system a method for operating a multi-cell radio system, especially an OFDMA-based radio system including a plurality of base stations, wherein different frequency reuse factors are used within different reuse zones of one cell by a fractional frequency reuse (FFR) scheme, the method includes the following steps: allocating a size or resource to the different reuse zones, and allocating users into different reuse zones. Further, a multi-cell radio system is described, preferably for carrying out the above mentioned method.
    Type: Application
    Filed: September 7, 2009
    Publication date: September 15, 2011
    Applicants: NEC Europe Ltd., NEC Corporation
    Inventors: Jun Zhou, Linghang Fan, Yuefeng Zhou, Tetsu Ikeda
  • Publication number: 20110130088
    Abstract: A relay apparatus includes a first transmission/receiving means and second transmission/receiving means. The first transmission/receiving means exchanges a first relay link signal of a first frequency transmitted/received by a superordinate apparatus, with the superordinate apparatus and exchanges part of the first relay link signal as a second access link signal or a second relay link signal, at the first frequency, with a subordinate apparatus. The second transmission/receiving means exchanges the other part of the first relay link signal, which the first transmission/receiving means exchanges with the superordinate apparatus, as a third access link signal or a third relay link signal, at a second frequency that is different from the first frequency, with a subordinate apparatus.
    Type: Application
    Filed: August 10, 2009
    Publication date: June 2, 2011
    Inventor: Tetsu Ikeda
  • Publication number: 20110069655
    Abstract: A relay station apparatus includes a first transmission/receiving means and second transmission/receiving means. The first transmission/receiving means exchanges a first relay link signal transmitted/received by a superordinate apparatus, with the superordinate apparatus and exchanges part of the first relay link signal as a second access link signal or a second relay link signal, with a subordinate apparatus. The second transmission/receiving means exchanges the other part of the first relay link signal, which the first transmission/receiving means exchanges with the superordinate apparatus, as a third access link signal or a third relay link signal, with a subordinate apparatus.
    Type: Application
    Filed: April 20, 2009
    Publication date: March 24, 2011
    Inventor: Tetsu Ikeda
  • Publication number: 20110044255
    Abstract: A radio communication system includes a plurality of radio communication devices that transmit and receive a subframe as a unit. Each of the plurality of radio communication devices adds a cyclic prefix to the head of the effective symbol of each OFDM symbol that makes up a subframe and adds a postfix to the tail of the effective symbol of the last OFDM symbol of the subframe.
    Type: Application
    Filed: March 30, 2009
    Publication date: February 24, 2011
    Inventor: Tetsu Ikeda
  • Publication number: 20110044161
    Abstract: A radio communication system according to the present invention has a plurality of radio communication devices that transmit and receive subframes one by one. Each of the plurality of radio communication devices includes a subframe generation unit that generates the subframe with a plurality of symbols and causes an effective symbol length of a last symbol of the subframe to be 1/X (where X is an integer equal to or greater than 2) and a transmission unit that transmits the subframe to another radio communication device.
    Type: Application
    Filed: April 2, 2009
    Publication date: February 24, 2011
    Inventor: Tetsu Ikeda
  • Patent number: 7697498
    Abstract: To provide high-quality communication even when the power for synchronization preamble is reduced in an OFDM communication device. To achieve symbol synchronization, an OFDM communication device obtains a zero amplitude reduced preamble signal by passing a specified synchronization preamble through an ideal low-pass filter to reduce a signal component near zero amplitude within a time domain, and time-multiplexes the obtained zero amplitude reduced preamble signal with transmit data to generate an OFDM transmit signal. A receiver section of the OFDM communication device determines the cross correlation between a receive signal and a specified synchronization preamble, which is patterned the same as the counterpart in a transmitter section of the OFDM communication device, and detects a synchronization position in accordance with the determined cross correlation.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: April 13, 2010
    Assignee: Motorola, Inc.
    Inventors: Hidenori Akita, Tetsu Ikeda
  • Publication number: 20090312667
    Abstract: A system of accurately predicting birth of large-sized livestock such as cows sufficiently before the time of making delivery preparations and attending delivery is provided. Vaginal temperatures of livestock such as cows measured by temperature sensor/transmission modules 100 inserted in the vagina of the livestock are transmitted wirelessly, received by a reception module 200, and sent to a monitor center 350 from a station 310 connected to the Internet 300 via a wireless LAN or a wired LAN. The monitoring center 350 is capable of storing the transmitted vaginal temperature data of each livestock, predicting birth timings from the stored vaginal temperature data, and reporting the birth timings by email or the like to a feeder's cellular phone 320 or a cellular phone 340 of an affiliated veterinarian.
    Type: Application
    Filed: April 27, 2007
    Publication date: December 17, 2009
    Applicant: Remote Inc.
    Inventors: Shigeo Utsunomiya, Tetsu Ikeda, Shuichi Takeishi