Patents by Inventor Kojiro Hamabe

Kojiro Hamabe 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: 20200296770
    Abstract: A radio communication system provided with a communication device and a radio communication network system is characterized by comprising a transmission delay estimate information transmitting means for transmitting transmission delay estimate information to the radio communication network system when the transmission condition of the transmission delay estimate information is met.
    Type: Application
    Filed: May 20, 2020
    Publication date: September 17, 2020
    Inventors: Hisashi FUTAKI, Jinsock LEE, Kojiro HAMABE
  • Patent number: 10701736
    Abstract: A radio communication system provided with a communication device and a radio communication network system is characterized by comprising a transmission delay estimate information transmitting means for transmitting transmission delay estimate information to the radio communication network system when the transmission condition of the transmission delay estimate information is met.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: June 30, 2020
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Jinsock Lee, Kojiro Hamabe
  • Publication number: 20200196276
    Abstract: Disclosed is a radio communication system in which transmission parameters, such as MCS of MBSFN, the number of subframes, and a transmission power of a reserved cell, are adaptively output, based on a unicast traffic volume in a MBSFN area, a number of terminals, and a number of cells of the MBSFN area, so that a system throughput in the MBSFN area is maximized while satisfying an MBSFN quality requirement condition.
    Type: Application
    Filed: February 21, 2020
    Publication date: June 18, 2020
    Applicant: NEC CORPORATION
    Inventors: Hisashi FUTAKI, Kojiro HAMABE, Jinsock LEE
  • Patent number: 10624063
    Abstract: Disclosed is a radio communication system in which transmission parameters, such as MCS of MBSFN, the number of subframes, and a transmission power of a reserved cell, are adaptively output, based on a unicast traffic volume in a MBSFN area, a number of terminals, and a number of cells of the MBSFN area, so that a system throughput in the MBSFN area is maximized while satisfying an MBSFN quality requirement condition.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: April 14, 2020
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Kojiro Hamabe, Jinsock Lee
  • Patent number: 10499331
    Abstract: Because it is not possible to sufficiently reduce the number base stations that start uselessly in spite of being in a low traffic state, it is not possible to lower interference between adjacent cells and power consumption sufficiently. A base station starts transmission of a control signal with predetermined power when communication between another base station and a mobile station is started and a first predetermined condition is satisfied.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: December 3, 2019
    Assignee: NEC CORPORATION
    Inventors: Toshifumi Nakamura, Kojiro Hamabe, Masayuki Ariyoshi, Kazushi Muraoka
  • Publication number: 20190289572
    Abstract: Disclosed is a radio communication system in which transmission parameters, such as MCS of MBSFN, the number of subframes, and a transmission power of a reserved cell, are adaptively output, based on a unicast traffic volume in a MBSFN area, a number of terminals, and a number of cells of the MBSFN area, so that a system throughput in the MBSFN area is maximized while satisfying an MBSFN quality requirement condition.
    Type: Application
    Filed: June 7, 2019
    Publication date: September 19, 2019
    Applicant: NEC CORPORATION
    Inventors: Hisashi FUTAKI, Kojiro Hamabe, Jinsock Lee
  • Publication number: 20190274173
    Abstract: A radio communication system provided with a communication device and a radio communication network system is characterized by comprising a transmission delay estimate information transmitting means for transmitting transmission delay estimate information to the radio communication network system when the transmission condition of the transmission delay estimate information is met.
    Type: Application
    Filed: May 21, 2019
    Publication date: September 5, 2019
    Applicant: NEC CORPORATION
    Inventors: Hisashi FUTAKI, Jinsock LEE, Kojiro HAMABE
  • Patent number: 10362561
    Abstract: Disclosed is a radio communication system in which transmission parameters, such as MCS of MBSFN, the number of subframes, and a transmission power of a reserved cell, are adaptively output, based on a unicast traffic volume in a MBSFN area, a number of terminals, and a number of cells of the MBSFN area, so that a system throughput in the MBSFN area is maximized while satisfying an MBSFN quality requirement condition.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: July 23, 2019
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Kojiro Hamabe, Jinsock Lee
  • Patent number: 10356822
    Abstract: A radio communication system provided with a communication device and a radio communication network system is characterized by comprising a transmission delay estimate information transmitting means for transmitting transmission delay estimate information to the radio communication network system when the transmission condition of the transmission delay estimate information is met.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: July 16, 2019
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Jinsock Lee, Kojiro Hamabe
  • Patent number: 10356825
    Abstract: To solve a problem that unless all of a plurality of AICH signature states are correctly decoded, the contents of reception results cannot be recognized and the error rate of signature decoding will be high. In this embodiment, a base station uses, out of a signature combination, the signature of at least one predetermined position to indicate information containing a preamble reception result and uses the signature of a position other than the predetermined position to indicate a transmission profile information number of an uplink channel for notification to a user equipment. Thus, the error rate related to reception results can be reduced as compared with the case where a single signature combination is used to notify all pieces of information.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: July 16, 2019
    Assignee: NEC CORPORATION
    Inventors: Hiroaki Aminaka, Kojiro Hamabe, Jinsock Lee
  • Publication number: 20190182871
    Abstract: A resource allocation method and device are provided that can achieve uniform loads on and stable quality of a common channel available to mobile stations having no dedicated channels. A method for allocating common channel resources in a system in which a plurality of first radio communication devices transmit data to a second radio communication device over a common channel, based on first resource allocation information, includes: by the second radio communication device, transmitting second resource allocation information to at least one of the first radio communication devices; and by each of the first radio communication devices, transmitting data to the second radio communication device over the common channel, based on any one of the first resource allocation information and the second resource allocation information.
    Type: Application
    Filed: February 14, 2019
    Publication date: June 13, 2019
    Applicant: NEC CORPORATION
    Inventors: Hiroaki AMINAKA, Kojiro HAMABE, Jinsock LEE
  • Patent number: 10299176
    Abstract: A mobile station determines, in accordance with reception quality of a radio signal from a base station, a measurement cycle of a predetermined measurement on a link status and/or on/off of the predetermined measurement and controls execution of the predetermined measurement based on the determination.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: May 21, 2019
    Assignee: NEC CORPORATION
    Inventors: Kojiro Hamabe, Jinsock Lee
  • Patent number: 10244560
    Abstract: A resource allocation method and device are provided that can achieve uniform loads on and stable quality of a common channel available to mobile stations having no dedicated channels. A method for allocating common channel resources in a system in which a plurality of first radio communication devices transmit data to a second radio communication device over a common channel, based on first resource allocation information, includes: by the second radio communication device, transmitting second resource allocation information to at least one of the first radio communication devices; and by each of the first radio communication devices, transmitting data to the second radio communication device over the common channel, based on any one of the first resource allocation information and the second resource allocation information.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: March 26, 2019
    Assignee: NEC CORPORATION
    Inventors: Hiroaki Aminaka, Kojiro Hamabe, Jinsock Lee
  • Patent number: 10244548
    Abstract: A radio station (1) includes a first part (1A) and at least one second part (1B). The second part (1B) can be arranged so as to be physically separated from the first part (1A) and is connected to the first part (1A) via a transmission line (40) so as to be able to communicate with the first part (1A). The first part (1A) includes a bearer termination unit (10) capable of terminating at least one bearer between an upper network and the radio station (1). The second part (1B) includes a physical layer signal processing unit (12) that performs physical layer signal processing. The physical layer signal processing includes channel coding and decoding for user data pertaining to a first mobile station connected to the second part (1B) among a plurality of mobile stations.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: March 26, 2019
    Assignee: NEC Corporation
    Inventors: Hiroaki Aminaka, Kojiro Hamabe
  • Publication number: 20190037490
    Abstract: Because it is not possible to sufficiently reduce the number base stations that start uselessly in spite of being in a low traffic state, it is not possible to lower interference between adjacent cells and power consumption sufficiently. A base station starts transmission of a control signal with predetermined power when communication between another base station and a mobile station is started and a first predetermined condition is satisfied.
    Type: Application
    Filed: September 28, 2018
    Publication date: January 31, 2019
    Applicant: NEC CORPORATION
    Inventors: Toshifumi NAKAMURA, Kojiro HAMABE, Masayuki ARIYOSHI, Kazushi MURAOKA
  • Publication number: 20190037610
    Abstract: To solve a problem that unless all of a plurality of AICH signature states are correctly decoded, the contents of reception results cannot be recognized and the error rate of signature decoding will be high. In this embodiment, a base station uses, out of a signature combination, the signature of at least one predetermined position to indicate information containing a preamble reception result and uses the signature of a position other than the predetermined position to indicate a transmission profile information number of an uplink channel for notification to a user equipment. Thus, the error rate related to reception results can be reduced as compared with the case where a single signature combination is used to notify all pieces of information.
    Type: Application
    Filed: October 3, 2018
    Publication date: January 31, 2019
    Inventors: Hiroaki AMINAKA, Kojiro HAMABE, Jinsock LEE
  • Publication number: 20180359767
    Abstract: A radio station (1) includes a first part (1A) and at least one second part (1B). The second part (1B) can be arranged so as to be physically separated from the first part (1A) and is connected to the first part (1A) via a transmission line (40) so as to be able to communicate with the first part (1A). The first part (1A) includes a bearer termination unit (10) capable of terminating at least one bearer between an upper network and the radio station (1). The second part (1B) includes a physical layer signal processing unit (12) that performs physical layer signal processing. The physical layer signal processing includes channel coding and decoding for user data pertaining to a first mobile station connected to the second part (1B) among a plurality of mobile stations.
    Type: Application
    Filed: August 21, 2018
    Publication date: December 13, 2018
    Applicant: NEC Corporation
    Inventors: Hiroaki AMINAKA, Kojiro HAMABE
  • Patent number: 10154508
    Abstract: A radio station (1) includes a first part (1A) and at least one second part (1B). The second part (1B) can be arranged so as to be physically separated from the first part (1A) and is connected to the first part (1A) via a transmission line (40) so as to be able to communicate with the first part (1A). The first part (1A) includes a bearer termination unit (10) capable of terminating at least one bearer between an upper network and the radio station (1). The second part (1B) includes a physical layer signal processing unit (12) that performs physical layer signal processing. The physical layer signal processing includes channel coding and decoding for user data pertaining to a first mobile station connected to the second part (1B) among a plurality of mobile stations.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: December 11, 2018
    Assignee: NEC Corporation
    Inventors: Hiroaki Aminaka, Kojiro Hamabe
  • Patent number: 10123357
    Abstract: To solve a problem that unless all of a plurality of AICH signature states are correctly decoded, the contents of reception results cannot be recognized and the error rate of signature decoding will be high. In this embodiment, a base station uses, out of a signature combination, the signature of at least one predetermined position to indicate information containing a preamble reception result and uses the signature of a position other than the predetermined position to indicate a transmission profile information number of an uplink channel for notification to a user equipment. Thus, the error rate related to reception results can be reduced as compared with the case where a single signature combination is used to notify all pieces of information.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: November 6, 2018
    Assignee: NEC CORPORATION
    Inventors: Hiroaki Aminaka, Kojiro Hamabe, Jinsock Lee
  • Patent number: 10123267
    Abstract: Because it is not possible to sufficiently reduce the number base stations that start uselessly in spite of being in a low traffic state, it is not possible to lower interference between adjacent cells and power consumption sufficiently. A base station starts transmission of a control signal with predetermined power when communication between another base station and a mobile station is started and a first predetermined condition is satisfied.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: November 6, 2018
    Assignee: NEC CORPORATION
    Inventors: Toshifumi Nakamura, Kojiro Hamabe, Masayuki Ariyoshi, Kazushi Muraoka