Patents by Inventor Isamu Yoshii

Isamu Yoshii 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: 10644745
    Abstract: In order to reduce interference between cells through hopping and use frequencies in a good propagation situation, a scheduler section carries out scheduling for determining to which user data should be sent using CQI from each communication terminal apparatus, selects a user signal to be sent in the next frame and determines in which subcarrier block the data should be sent. An MCS decision section selects a modulation scheme and coding method from the CQI of the selected user signal. A subcarrier block selection section selects a subcarrier block instructed by the scheduler section 102 for each user signal. For the respective subcarrier blocks, FH sequence selection sections select hopping patterns. A subcarrier mapping section maps the user signal and control data to subcarriers according to the selected hopping pattern.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: May 5, 2020
    Assignee: Godo Kaisha IP Bridge 1
    Inventors: Akihiko Nishio, Katsuhiko Hiramatsu, Isamu Yoshii
  • Publication number: 20190182864
    Abstract: An communication apparatus of the present disclosure comprises a receiver that receives a Trigger frame for allocating resource units (RUs) for random access and another frame including Random Access parameter element that comprises a first field indicating an OFDMA contention window (OCW) minimum value (OCWmin) and a second field indicating an OCW maximum value (OCWmax); and control circuitry that controls Uplink OFDMA-based Random Access (UORA) procedure using the OCWmin and the OCWmax.
    Type: Application
    Filed: August 21, 2017
    Publication date: June 13, 2019
    Inventors: LEI HUANG, ROJAN CHITRAKAR, YOSHIO URABE, ISAMU YOSHII
  • Publication number: 20180063821
    Abstract: A transmission apparatus comprises an assignment information generator which, in operation, assigns resources on a resource unit (RU) basis to one or more terminal stations (STAs) and generates assignment information that specifies RUs allocated to the one or more STAs; a transmission signal generator which, in operation, generates a transmission signal that includes a legacy preamble, a non-legacy preamble and a data field, wherein the non-legacy preamble comprises a first signal field and a second signal field that carry a set ID and the assignment information, and wherein the set ID identifies one assignment set comprising the one or more STAs and a plurality of assignment indices, and wherein the assignment information comprises a resource assignment indication for each of a plurality of assignment which are referenced by the plurality of assignment indices; and a transmitter which, in operation, transmits the generated transmission signal.
    Type: Application
    Filed: October 23, 2017
    Publication date: March 1, 2018
    Inventors: LEI HUANG, HONG CHENG MICHAEL SIM, YOSHIO URABE, ISAMU YOSHII
  • Patent number: 9380572
    Abstract: A base station (BS) which communicates with a plurality of mobile stations (MSs) is configured so as to comprise a control signal generation unit which generates control signals showing information on the allocation of resources for each of the plurality of mobile stations (MSs), and a transmission unit which transmits the control signals to the plurality of mobile stations (MSs). A control signal for a given mobile station (MS) includes information relating to another mobile station (MS).
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: June 28, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Lei Huang, Isamu Yoshii, Daichi Imamura
  • Patent number: 9276650
    Abstract: A wireless communication apparatus and a response control method wherein in a case of applying Persistent Allocation (PA) to MU-MIMO, the increase in the resources to be used in the feedback can be precluded. In a terminal, a response control unit causes, based on the type of downstream allocation control information, on an error detection result obtained by an error detecting unit and on a response rule table, a response signal to be transmitted by use of an upstream response resource designated in the downstream allocation control information.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: March 1, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takaaki Kishigami, Isamu Yoshii
  • Patent number: 9226301
    Abstract: A wireless base station apparatus includes an interference report receiver configured to receive interference reports transmitted on a shared radio resource from a plurality of wireless terminals that are present in a plurality of adjacent cells that are adjacent to a target cell, the shared radio resource being comprised of a plurality of carriers and being shared between the plurality of adjacent cells, and an adaptive fractional frequency reuse controller configured to control adaptive fractional frequency reuse processing in a downlink of the target cell, based on the received interference reports showing a downlink reception quality, wherein the interference reports are transmitted using selected carriers from the plurality of carriers by the plurality of wireless terminals, based on the downlink reception quality.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: December 29, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Isamu Yoshii, Atsushi Sumasu, Tomohiro Imai, Naoya Yosoku, Hidenori Kayama
  • Publication number: 20150333882
    Abstract: In order to reduce interference between cells through hopping and use frequencies in a good propagation situation, a scheduler section carries out scheduling for determining to which user data should be sent using CQI from each communication terminal apparatus, selects a user signal to be sent in the next frame and determines in which subcarrier block the data should be sent. An MCS decision section selects a modulation scheme and coding method from the CQI of the selected user signal. A subcarrier block selection section selects a subcarrier block instructed by the scheduler section 102 for each user signal. For the respective subcarrier blocks, FH sequence selection sections select hopping patterns. A subcarrier mapping section maps the user signal and control data to subcarriers according to the selected hopping pattern.
    Type: Application
    Filed: July 28, 2015
    Publication date: November 19, 2015
    Inventors: Akihiko NISHIO, Katsuhiko Hiramatsu, Isamu Yoshii
  • Patent number: 9191770
    Abstract: By reducing the overlap between HARQ subpackets transmitted by means of a transmitting MS and a cooperative MS, the disclosed method is capable of increasing gains in HARQ IR signal synthesis. The method transmits a hybrid automatic repeat request (HARQ) in a cooperative communication system formed so as to comprise a transmitting mobile station (MS) and a cooperative MS, and involves creating individual HARQ subpackets transmitted by means of the transmitting MS and the cooperative MS such that said subpackets are arranged in mutually opposite directions in a circular buffer.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: November 17, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Lei Huang, Isamu Yoshii
  • Patent number: 9143192
    Abstract: In order to reduce interference between cells through hopping and use frequencies in a good propagation situation, a scheduler section carries out scheduling for determining to which user data should be sent using CQI from each communication terminal apparatus, selects a user signal to be sent in the next frame and determines in which subcarrier block the data should be sent. An MCS decision section selects a modulation scheme and coding method from the CQI of the selected user signal. A subcarrier block selection section selects a subcarrier block instructed by the scheduler section 102 for each user signal. For the respective subcarrier blocks, FH sequence selection sections select hopping patterns. A subcarrier mapping section maps the user signal and control data to subcarriers according to the selected hopping pattern.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: September 22, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Akihiko Nishio, Katsuhiko Hiramatsu, Isamu Yoshii
  • Patent number: 9124913
    Abstract: As a parameter control unit that controls video encoding parameters regarding video encoding in a video encoding unit and transmission channel parameters regarding error correction coding and modulation in a channel coding/modulation unit so as to be linked to each other, a cross layer rate control unit is provided. The cross layer rate control unit performs variable control of the GOP size according to propagation changes by reducing the GOP size when the amount of change in the predicted value of the PHY transmission rate is larger than a determined amount of change and increasing the GOP size when the amount of change in the predicted value of the PHY transmission rate is equal to or less than the determined amount of change.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: September 1, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takaaki Kishigami, Daichi Imamura, Isamu Yoshii
  • Patent number: 9106911
    Abstract: When controlling transmission channel parameters and video encoding parameters so as to be linked to each other in video transmission, the video quality on the receiving side is further improved. As a parameter control unit that controls video encoding parameters regarding video encoding in a video encoding unit and transmission channel parameters regarding error correction coding and modulation in a channel coding/modulation unit so as to be linked to each other, a cross layer rate control unit is provided. The cross layer rate control unit performs variable control of the GOP size according to propagation changes by reducing the GOP size when the predicted value of the PHY transmission rate is larger than a determined reference value and increasing the GOP size when the predicted value of the PHY transmission rate is equal to or less than the determined reference value.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: August 11, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takaaki Kishigami, Daichi Imamura, Isamu Yoshii
  • Publication number: 20150173053
    Abstract: A base station (BS) which communicates with a plurality of mobile stations (MSs) is configured so as to comprise a control signal generation unit which generates control signals showing information on the allocation of resources for each of the plurality of mobile stations (MSs), and a transmission unit which transmits the control signals to the plurality of mobile stations (MSs). A control signal for a given mobile station (MS) includes information relating to another mobile station (MS).
    Type: Application
    Filed: February 26, 2015
    Publication date: June 18, 2015
    Inventors: Lei Huang, Isamu Yoshii, Daichi Imamura
  • Patent number: 9031022
    Abstract: A base station (BS) which communicates with a plurality of mobile stations (MSs) is configured so as to comprise a control signal generation unit which generates control signals showing information on the allocation of resources for each of the plurality of mobile stations (MSs), and a transmission unit which transmits the control signals to the plurality of mobile stations (MSs). A control signal for a given mobile station (MS) includes information relating to another mobile station (MS).
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: May 12, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Lei Huang, Isamu Yoshii, Daichi Imamura
  • Patent number: 8982818
    Abstract: A wireless communications device that transmits a multiplexed signal of a plurality of data sets of different sizes to a communications terminal includes an empty resource block detection section, which detects empty resource blocks of the data sets each of which does not use any of a predetermined number of resource blocks, from among the plurality of data sets whereto the predetermined number of resource blocks are allocated in the time direction and the frequency direction; and a data redistribution section that redistributes a part of data that is distributed in resource blocks, with respect to the data sets whereto resource including empty resource blocks are allocated, in the vicinity of pilot symbols that are disposed within the empty resource blocks. It is possible to effectively utilize the function of all the pilot symbols and improve error rate characteristics.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Ryohei Kimura, Takaaki Kishigami, Isamu Yoshii, Daichi Imamura
  • Patent number: 8861456
    Abstract: To improve the frequency diversity effect by preventing the related bits in the encoded data from being biased to the specified carrier in the case of performing the multicarrier operation. A modulated symbol sequence is segmented in a data segmentation section (116), and the segmented modulated symbol blocks are mapped on a plurality of carriers in a segment mapping section (120). The data segmentation section (116) groups each of K parts in the modulated symbol sequence into the same number of N groups, cyclically shifts the N groups for the respective parts of any (K?1) parts with shift amounts which differ among the parts, and substitutes the cyclically-shifted groups of the plurality of parts in the modulated symbol sequence with one another among the parts to segment the groups into a plurality of blocks.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: October 14, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Lei Huang, Isamu Yoshii
  • Patent number: 8842588
    Abstract: A high error correction capability is kept while reducing a processing delay in application of the ECC in a multi-radio. A wireless communication device for performing data transmission by using a plurality of radio systems RAT1 and RAT2 includes, in a GLL 100 that absorbs a difference in physical layer and MAC layer among RATs, an encoder 301 that encodes transmission data, a multiplexer 302 that distributes encoded data in correspondence with the RAT1 and the RAT2, interleavers 303 and 304 that interleave a plurality of coded data that has been encoded and multiplexed, and a resource controller 305 that sets an interleaving size for each interleaving processing in the interleavers 303 and 304 based on a transmission delay difference between the RAT1 and the RAT2.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: September 23, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takaaki Kishigami, Isamu Yoshii
  • Patent number: 8788903
    Abstract: Disclosed are a wireless transmission device, wireless receiving device, and method for transmitting encoded data with which power consumption can be reduced at the receiving end in accordance with reception conditions, while resource-saving is maintained by employing an erasure correcting code (ECC).
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: July 22, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takaaki Kishigami, Isamu Yoshii
  • Patent number: 8787268
    Abstract: Disclosed are a radio communication base station device, a radio communication terminal device, and a radio communication method which can reduce interference between adjacent resource blocks even when the DL timing is overlapped with the UL timing at the boundary between an independent allocation band and a cooperation allocation band. When a terminal A is allocated for a UL resource block of the cooperation allocation band serving as a band boundary with the independent allocation band, in ST301, a terminal A transmits a horizontally polarized wave signal to respective terminals B to D, and in ST302, a base station (100) transmits a vertically polarized signal to respective terminals A to D. In ST303, the terminals B to D measure XPD of the received vertically polarized signal and the horizontally polarized signal. In ST304, the terminals B to D transmit the XPD report value to the base station (100).
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: July 22, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Isamu Yoshii, Atsushi Sumasu, Katsuhiko Hiramatsu
  • Patent number: 8726117
    Abstract: A wireless reception apparatus (200) for a wireless communication system which transmits, between an MBS transmission apparatus and MBS reception apparatus, multiple transport blocks (TB) coded by error correction coding at the physical layer or at both the physical layer and the data link layer. In the wireless reception apparatus (200), a feedback condition judgment unit (208) transmits feedback information to the MBS transmission apparatus when a reception judgment unit (206) detects errors in L or more TBs out of an N-number of TBs (N is a natural number while L is a natural number less than N) that constitute the beginning portion of any MAC FEC blocks where the beginning TB has been identified. In the wireless communication apparatus (100), the link adaptation unit (114), based on the feedback information from the wireless communication apparatus (200), adjusts the physical layer transmission parameters used for the TBs in the physical layer processing unit.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: May 13, 2014
    Assignee: Panasonic Corporation
    Inventors: Takaaki Kishigami, Isamu Yoshii
  • Patent number: 8654710
    Abstract: A base station (100) reduces overhead created by the notification of user allocation information (individual control information) in performing multi-user MIMO transmission. The base station (100) has spatial multiplex signal forming units (individual data sequence creation unit (120) and beam formation unit (123)) that form signals that are spatial multiplex transmitted from multiple antennas, a common control signal formation unit (111) that forms common control signals that are transmitted in common from multiple antennas, and an individual control signal appending unit (122) that includes an individual control signal for each terminal address in a spatial multiplex transmitted signal.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: February 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Takaaki Kishigami, Isamu Yoshii, Ryohei Kimura, Seigo Nakao