Patents by Inventor Eiji Mochida

Eiji Mochida 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: 8687514
    Abstract: Interference suppression by beam forming is achieved even in an FDD (Frequency Division Duplex) system. A base station device 1 performs communication based on FDD. The base station device 1 includes a downlink signal reception unit 12 that receives a downlink signal transmitted from another base station device. The base station device 1 performs a beam forming process for directing a null beam to an arrival direction of the downlink signal from the another base station device, by using transmission path information between the base station device and the another base station device, the information being available from the downlink signal received by the downlink signal reception unit 12.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: April 1, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Yamamoto, Eiji Mochida, Yoshizo Tanaka
  • Publication number: 20130003680
    Abstract: A base station device is provided with a MAC unit 30 which performs processing on a MAC layer for wireless communication, a scheduler 10 which performs scheduling for determining allocation of radio resources, and a radio resource management unit 70 which manages the radio resources. The scheduler 10 is connected to the radio resource management unit 70 so as to obtain information from the radio resource management unit 70 without intervention of the MAC unit 30.
    Type: Application
    Filed: March 22, 2011
    Publication date: January 3, 2013
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Yamamoto, Yoshizo Tanaka, Eiji Mochida
  • Publication number: 20120315956
    Abstract: When installing a femto base station device 1b, failure that may occur in wireless communication is suppressed. The femto base station device 1b includes an RF unit 4 which transmits broadcast information or paging information to a femto terminal device 2b communicating with the femto base station device 1b, and an information storage unit 31 which adds and stores, in the broadcast information or the paging information, location information that relates to the location of the femto base station device 1b and is used by another wireless communication device to suppress interference.
    Type: Application
    Filed: January 13, 2011
    Publication date: December 13, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Eiji Mochida, Kenichi Murakami
  • Publication number: 20120282889
    Abstract: A base station device is provided with a control information obtaining unit (23) that obtains allocation information indicating an allocation status, for each resource block, of a radio resource allocated to another terminal device that communicates with another base station device, and an output control unit (20) that controls a transmission power of a downlink signal of the base station device and/or a transmission power of an uplink signal of a terminal device connected to the base station device, for each resource block, based on the allocation information. Therefore, the base station device is capable of suppressing interference more effectively depending on various situations.
    Type: Application
    Filed: January 6, 2011
    Publication date: November 8, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD
    Inventors: Yoshizo Tanaka, Takashi Yamamoto, Yoji Okada, Eiji Mochida
  • Publication number: 20120243503
    Abstract: There is provided a communication apparatus capable of effectively removing interference waves from a received signal while reducing the computation load. The communication apparatus includes a weight calculating unit. The weight calculating unit includes a calculating unit and a selecting unit. The calculating unit calculates a first weight and a second weight. The first weight is obtained, for a target known signal being an update target, by updating, using the target known signal, a weight of a first another known signal updated immediately before performing an update using the target known signal. The second weight is obtained, for a target known signal being an update target, by updating, using the target known signal, a weight of a second another known signal. The selecting unit selects one of the first weight and the second weight that has a lower estimation error.
    Type: Application
    Filed: January 18, 2011
    Publication date: September 27, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Eiji Mochida
  • Publication number: 20120225646
    Abstract: A communication system (1) includes a mobile communication network (2); a fixed communication network (3) connected to the mobile communication network (2); and a plurality of radio base stations capable of communicating with a mobile terminal (100) by radio communication. The radio base stations include a first base station (41, 42) connected to the mobile communication network (2); and second base stations (51, 52) connected to the fixed communication network (3) through wire communication lines (61, 62). A communication connection using a predetermined interface is established between one of the second base stations (51) and one of neighboring base stations (the first base station (42) and another one of the second base stations (52)) located in the neighborhood of the one of the second base stations (51).
    Type: Application
    Filed: October 29, 2010
    Publication date: September 6, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD
    Inventors: Eiji Mochida, Hirotsugu Yamamoto, Kenichi Murakami
  • Publication number: 20120208525
    Abstract: An object of the present invention is to provide a compact base station and a program that can inform a user of communication quality of uplink communication in mobile communication. A compact base station of the present invention is a femtocell base station 100 having a transmitting and receiving unit 110 that performs wireless communication with a mobile terminal 200, and includes a measuring unit 120 that measures communication quality of uplink communication from the mobile terminal 200 to the femtocell base station 100, based on an uplink signal received by the transmitting and receiving unit 110 from the mobile terminal 200; and a quality informing unit 130 that allows an output unit 150, 250 to inform of the communication quality measured by the measuring unit 120, the output unit 150, 250 performing informing output to a user.
    Type: Application
    Filed: October 28, 2010
    Publication date: August 16, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Eiji Mochida
  • Publication number: 20120201221
    Abstract: A decrease in weight calculation accuracy in MMSE combining caused by a shift in the discrete Fourier transform timing of received signals is prevented. A wireless communication apparatus BS1 includes an MMSE combining processing unit 31 that performs MMSE combining based on frequency domain received signals obtained by performing a discrete Fourier transform on received signals. The wireless communication apparatus BS1 includes an amount-of-phase-rotation estimating unit 32 that estimates an amount of phase rotation occurring in the frequency domain received signals due to a shift in discrete Fourier transform timing of the received signals; and reverse rotation units 33a and 33b that apply a reverse rotation of an amount of rotation corresponding to the amount of phase rotation estimated by the amount-of-phase-rotation estimating unit 32, to the frequency domain received signals.
    Type: Application
    Filed: October 26, 2010
    Publication date: August 9, 2012
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventor: Eiji Mochida
  • Publication number: 20120155341
    Abstract: Interference suppression by beam forming is achieved even in an FDD (Frequency Division Duplex) system. A base station device 1 performs communication based on FDD. The base station device 1 includes a downlink signal reception unit 12 that receives a downlink signal transmitted from another base station device. The base station device 1 performs a beam forming process for directing a null beam to an arrival direction of the downlink signal from the another base station device, by using transmission path information between the base station device and the another base station device, the information being available from the downlink signal received by the downlink signal reception unit 12.
    Type: Application
    Filed: October 4, 2010
    Publication date: June 21, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Takashi Yamamoto, Eiji Mochida, Yoshizo Tanaka
  • Publication number: 20110286412
    Abstract: A communication apparatus capable of simultaneously receiving signals from a plurality of users by an SC-FDMA scheme reduces its circuit size. A communication apparatus BS1, BS2 is capable of simultaneously receiving signals from a plurality of users by the SC-FDMA scheme. The communication apparatus BS1, BS2 includes a plurality of antennas 1a and 1b; a processing unit 6 that performs multi-antenna signal processing on a plurality of received SC-FDMA signals in a frequency domain, the received SC-FDMA signals being received by the plurality of antennas 1a and 1b; and a user separating unit 7 that demultiplexes a signal obtained through the multi-antenna signal processing, into signals for each user based on user allocation information in the SC-FDMA scheme.
    Type: Application
    Filed: October 26, 2009
    Publication date: November 24, 2011
    Inventors: Eiji Mochida, Mitsuru Hirakawa