Patents by Inventor Miho Maeda

Miho Maeda 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: 9788296
    Abstract: A mobile communication system capable of performing communication between a user equipment device connected to a relay device and a core network if the relay device moves. A relay device sets a tracking area of a base station device to be connected with the own device as a tracking area of the own device. For example, when the relay device moves along an arrow, the tracking area of the relay device is changed from a first tracking area to which a fourth base station device belongs to a third tracking area to which a tenth base station device belongs. Upon change of the tracking area of the relay device as described above, a user equipment device transmits a tracking area update request signal of the own device to a target second mobility management entity.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: October 10, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuru Mochizuki, Miho Maeda, Shinsuke Uga
  • Publication number: 20170290039
    Abstract: Provided is a communication system that can be normally and efficiently operated in the case where existing carriers and new carrier types coexist. A base station device and a communication terminal device are configured to perform communication in cells of legacy carriers LC1 to LC3 being existing carriers. When the base station device starts operating new carrier types NCT1 and NCT2, the NCT1 and NCT2 are associated with legacy carriers belonging to the same frequency band. For example, the NCT2 is associated with the LC2 or the LC3 and is not associated with the LC1. The legacy carriers LC1 to LC3 associated with the NCT1 and the NCT2 notify the communication terminal device of the information on the NCT1 and NCT2. This allows the communication terminal device to communicate with the NCT1 and the NCT2.
    Type: Application
    Filed: June 21, 2017
    Publication date: October 5, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Mitsuru MOCHIZUKI, Miho MAEDA, Shinsuke UGA
  • Publication number: 20170289902
    Abstract: In a mobile communication system, an RRM measurement set is set as a collection of cells to become targets on which a UE performs a process of detecting whether or not radio communication is allowed. Among the cells in the RRM measurement set, a CoMP measurement set is set as a collection of cells to become candidates on which the UE performs a process of detecting whether or not coordinated communication (CoMP communication) is allowed. Among the cells of the CoMP measurement set, a CoMP active set is set as a collection of cells to become targets on which the UE performs the process of detecting whether or not CoMP communication is allowed.
    Type: Application
    Filed: June 15, 2017
    Publication date: October 5, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Mitsuru MOCHIZUKI, Miho MAEDA, Shinsuke UGA, Noriyuki FUKUI
  • Publication number: 20170272218
    Abstract: The present invention relates to a mobile communication system having a coordinated communication mode in which radio communication is performed between a user equipment and a plurality of base stations in a coordinated manner and an uncoordinated communication mode in which radio communication is performed between a user equipment and a base station without coordinating with another base station, in which radio communication is performed by selectively using any of the coordinated communication mode and the uncoordinated communication mode.
    Type: Application
    Filed: June 8, 2017
    Publication date: September 21, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuru MOCHIZUKI, Miho MAEDA, Taiga SAEGUSA, Yasushi IWANE
  • Patent number: 9730213
    Abstract: A communication system includes a movable terminal device and a plurality of communication devices configured to perform radio communication with the terminal device. The communication devices include a large-scale communication device having a first range in which communication with said terminal device is possible and a small-scale communication device having a second range in which said communication is possible. The first range is larger than the second range. A handover of the terminal device from the large-scale communication device to the small-scale communication device is prohibited whenever (a) the small-scale communication device is connected with the large-scale communication device by a dedicated line, (b) said small-scale communication device operates by using functionality of the large-scale communication device, or (c) the small-scale communication device is located within the first range of the large-scale communication device.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: August 8, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Miho Maeda, Mitsuru Mochizuki
  • Patent number: 9713068
    Abstract: A closed subscriber group (CSG) cell is a cell that allows use of subscribers. In order to receive the service by the CSG cell, a CSG-ID is required to be notified to a user equipment, which cannot be obtained in a situation outside the reach of radio waves from a non-CSG cell. In a mobile communication system including base stations respectively provided to a CSG cell and a non-CSG cell in which access is made to the CSG cell with the use of a CSG-ID issued in a case where use of the CSG cell is allowed, the base station provided in the CSG cell refers to the notified identification information of a user equipment and then transmits a tracking area update request from the user equipment to a core network, and the core network determines whether the user equipment is allowed to use the CSG cell and, in the case where the use is allowed, transmits a signal for allowing assignment of radio resources to the user equipment and the CSG-ID. The user equipment accesses the CSG cell with the use of the CSG-ID.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: July 18, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Miho Maeda, Mitsuru Mochizuki, Taiga Saegusa, Yasushi Iwane, Yuji Kakehi, Masayuki Nakazawa, Taisei Suemitsu
  • Patent number: 9712213
    Abstract: In a mobile communication system, an RRM measurement set is set as a collection of cells to become targets on which a UE performs a process of detecting whether or not radio communication is allowed. Among the cells in the RRM measurement set, a CoMP measurement set is set as a collection of cells to become candidates on which the UE performs a process of detecting whether or not coordinated communication (CoMP communication) is allowed. Among the cells of the CoMP measurement set, a CoMP active set is set as a collection of cells to become targets on which the UE performs the process of detecting whether or not CoMP communication is allowed.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: July 18, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuru Mochizuki, Miho Maeda, Shinsuke Uga, Noriyuki Fukui
  • Patent number: 9713148
    Abstract: Provided is a communication system that can be normally and efficiently operated in the case where existing carriers and new carrier types coexist. A base station device and a communication terminal device are configured to perform communication in cells of legacy carriers LC1 to LC3 being existing carriers. When the base station device starts operating new carrier types NCT1 and NCT2, the NCT1 and NCT2 are associated with legacy carriers belonging to the same frequency band. For example, the NCT2 is associated with the LC2 or the LC3 and is not associated with the LC1. The legacy carriers LC1 to LC3 associated with the NCT1 and the NCT2 notify the communication terminal device of the information on the NCT1 and NCT2. This allows the communication terminal device to communicate with the NCT1 and the NCT2.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: July 18, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuru Mochizuki, Miho Maeda, Shinsuke Uga
  • Patent number: 9705648
    Abstract: The present invention relates to a mobile communication system having a coordinated communication mode in which radio communication is performed between a user equipment and a plurality of base stations in a coordinated manner and an uncoordinated communication mode in which radio communication is performed between a user equipment and a base station without coordinating with another base station, in which radio communication is performed by selectively using any of the coordinated communication mode and the uncoordinated communication mode.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: July 11, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuru Mochizuki, Miho Maeda, Taiga Saegusa, Yasushi Iwane
  • Publication number: 20170195965
    Abstract: In a communication system of the present invention, a HeNB measures interference in Step ST41 in an energy saving mode. When judging to have detected the interference by a UE during communication with an eNB in Step ST42, the HeNB cancels the energy saving mode and moves to a normal mode in Step ST43 and starts issuing a pilot signal in Step ST44. When the UE judges to have detected the pilot signal in Step ST23 and reports the judgment results to the eNB in Step ST24, in Steps ST25 to ST32, a handover process from the eNB to the HeNB is performed for the UE.
    Type: Application
    Filed: March 21, 2017
    Publication date: July 6, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yasuhiro ONAKA, Miho Maeda, Mitsuru Mochizuki, Taisei Suemitsu, Futoshi Katada, Yozo Fukuda
  • Publication number: 20170188356
    Abstract: In a communications system which complies with LTE including a base station which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal, in a case in which an uplink scheduling request signal is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal is transmitted.
    Type: Application
    Filed: March 16, 2017
    Publication date: June 29, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Miho MAEDA, Mitsuru MOCHIZUKI, Keiko TADA, Yasushi IWANE
  • Publication number: 20170171786
    Abstract: A UE in an idle state selects any of a group A, to which a cell of which coverage its own device is in, belongs and a group different from the group A, for example, a group B, and then measures cells belonging to the selected group for selecting a cell being a re-selection destination. A UE in a connected state selects any of the group B to which a cell connected with the UE belongs and a group different from the group B, for example, the group A, and measures cells belonging to the selected group for handover.
    Type: Application
    Filed: August 8, 2014
    Publication date: June 15, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuru MOCHIZUKI, Miho MAEDA, Shinsuke UGA, Noriyuki FUKUI
  • Publication number: 20170156092
    Abstract: A mobile communication system includes a CSG cell which is accessible by a CSG member, a hybrid cell which is the CSG cell where a non-CSG member is also allowed access at the same time, and a mobile terminal which is subscribed as the CSG member and connected to the CSG cell or the hybrid cell as the CSG member. Even in a case in which a subscription time period has expired, the mobile communication system enables the mobile terminal to continue the connection. When the subscription time period for the CSG member expires, in case of the mobile terminal's connection to the CSG cell, the CSG cell initiates a handover, in case of the mobile terminal's connection to the hybrid cell, the hybrid cell changes treatment for the mobile terminal from treating the mobile terminal as the CSG member to treating the mobile terminal as the non-CSG member.
    Type: Application
    Filed: February 14, 2017
    Publication date: June 1, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Miho MAEDA, Mitsuru MOCHIZUKI, Yasushi IWANE, Yuji KAKEHI, Masayuki NAKAZAWA, Taisei SUEMITSU
  • Publication number: 20170150404
    Abstract: A mobile communication system includes a movable user equipment device, a plurality of base station devices configured to perform radio communication with the user equipment device, and a relay device movably configured to relay radio communications between the user equipment device and the base station devices. In a handover process of switching a base station device to be connected with the relay device from a base station device being a moving source to a base station device being a moving destination along with moving of the relay device, the base station device being a moving source selects the base station device being a moving destination from base station devices other than a base station device that does not have a function supporting the relay device, and performs the handover process such that the relay device is connected to the selected base station device.
    Type: Application
    Filed: February 7, 2017
    Publication date: May 25, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Miho MAEDA, Mitsuru MOCHIZUKI, Shinsuke UGA, Noriyuki FUKUI, Yasushi IWANE
  • Patent number: 9635608
    Abstract: In a communication system, a HeNB measures interference in an energy saving mode. When judging to have detected the interference by a UE during communication with an eNB, the HeNB cancels the energy saving mode and moves to a normal mode and starts issuing a pilot signal. When the UE judges to have detected the pilot signal and reports the judgment results to the eNB, a handover process from the eNB to the HeNB is performed for the UE.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: April 25, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasuhiro Onaka, Miho Maeda, Mitsuru Mochizuki, Taisei Suemitsu, Futoshi Katada, Yozo Fukuda
  • Patent number: 9635656
    Abstract: In a communications system which complies with LTE including a base station 2 which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal 3, in a case in which an uplink scheduling request signal SR is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal SR is transmitted.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: April 25, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Miho Maeda, Mitsuru Mochizuki, Keiko Tada, Yasushi Iwane
  • Patent number: 9615310
    Abstract: A mobile communication system includes a CSG cell which is accessible by a CSG member, a hybrid cell which is the CSG cell where a non-CSG member is also allowed access at the same time, and a mobile terminal which is subscribed as the CSG member and connected to the CSG cell or the hybrid cell as the CSG member. Even in a case in which a subscription time period has expired, the mobile communication system enables the mobile terminal to continue the connection. When the subscription time period for the CSG member expires, in case of the mobile terminal's connection to the CSG cell, the CSG cell initiates a handover, in case of the mobile terminal's connection to the hybrid cell, the hybrid cell changes treatment for the mobile terminal from treating the mobile terminal as the CSG member to treating the mobile terminal as the non-CSG member.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: April 4, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Miho Maeda, Mitsuru Mochizuki, Yasushi Iwane, Yuji Kakehi, Masayuki Nakazawa, Taisei Suemitsu
  • Patent number: 9603060
    Abstract: A mobile communication system capable of continuing communication between a relay device and a base station device if the relay device moves. In a handover process, when it is judged that an establishment cause for RRC connection is attached from an RN, a target eNB judges whether the own device has the DeNB function. In a case of judging that the own device does not have the DeNB function, the target eNB notifies the RN of an RRC connection rejection. When being notified of the RRC connection reject, the RN stops the handover process and then returns to a source eNB.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: March 21, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Miho Maeda, Mitsuru Mochizuki, Shinsuke Uga, Noriyuki Fukui, Yasushi Iwane
  • Patent number: 9585070
    Abstract: A mobile communication system hybridly allows, in a case where an access group consisting of one or more user equipments and one or more base stations is registered, the base station included in the access group to have access in a closed mode from the user equipment included in the same access group and access in an open mode from a user equipment that is not included in the same access group, wherein a communication area of the base station in the open mode is identical to a communication area of the base station in the closed mode. This eliminates a communication area in which the base station serving as an access destination differs between the user equipment in the closed mode and the user equipment in the open mode.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: February 28, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuru Mochizuki, Miho Maeda, Yasushi Iwane, Yuji Kakehi, Masayuki Nakazawa, Taisei Suemitsu
  • Publication number: 20170055115
    Abstract: A radio communication system capable of, in a case where a base station device is movable, easily estimating the location of a base station device and easily estimating the location of a user equipment device using the estimation results, and also provide a user equipment device, a base station device, and a management device included in the radio communication system. In addition to an E-SMLC for UE for use in location estimation of a target UE, an E-SMLC for eNB for use in location estimation of an eNB is provided. The E-SMLC for eNB estimates location information of an eNB in an E-UTRAN and performs a process, such as the management of moving of a target eNode B_s and a target eNode B_uu based on the estimated location information.
    Type: Application
    Filed: November 8, 2016
    Publication date: February 23, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shinsuke UGA, Miho Maeda, Mitsuru Mochizuki