Patents by Inventor Hiroaki Aminaka

Hiroaki Aminaka 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).

  • Radio terminal, radio station, radio communication system, and methods implemented therein
    Patent number: 10028158
    Abstract: A radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100).
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: July 17, 2018
    Assignee: NEC Corporation
    Inventors: Hisashi Futaki, Hiroaki Aminaka, Hiroto Sugahara, Yoshikazu Kakura, Kazushi Muraoka
  • RADIO TERMINAL, D2D COMMUNICATION CONTROL APPARATUS, BASE STATION, PRELIMINARY RELAY RADIO TERMINAL SELECTION METHOD, NON-TRANSITORY COMPUTER READABLE MEDIUM
    Publication number: 20180192458
    Abstract: A D2D communication control apparatus (10) according to the present invention includes: a communication unit (11) configured to receive determination information that can be used to determine whether a plurality of radio terminals are capable of performing direct communication with another radio terminal; and a selection unit (12) configured to select, in a situation in which a first radio terminal included in the plurality of radio terminals is performing D2D communication with a relay radio terminal that performs cellular communication with a network, a radio terminal in which the determination information between the radio terminal and the relay radio terminal satisfies a predetermined condition among radio terminals capable of performing D2D communication with the first radio terminal, as a preliminary relay radio terminal.
    Type: Application
    Filed: January 19, 2016
    Publication date: July 5, 2018
    Applicant: NEC CORPORATION
    Inventors: Hiroaki AMINAKA, Kazushi MURAOKA, Taichi OHTSUJI
  • APPARATUS AND METHOD FOR SELECTING RELAY
    Publication number: 20180184436
    Abstract: A relay selecting apparatus (1, 3 or 5) is configured to select at least one specific relay terminal (2) suitable for a remote terminal (1) from among one or more relay terminals (2) based on a selection criterion that considers a time variation of a device-to-device (D2D) link quality between the remote terminal (1) and each of the one or more relay terminals (2). In this way, it is possible to contribute to improving a relay selection so as to provide a stable relay quality.
    Type: Application
    Filed: January 28, 2016
    Publication date: June 28, 2018
    Applicant: NEC CORPORATION
    Inventors: Taichi OHTSUJI, Kazushi MURAOKA, Hiroaki AMINAKA
  • Method and device for estimating communication load, radio station and upper-level apparatus in radio communication system
    Patent number: 9998937
    Abstract: A method and a device for estimating a communication load, as well as a radio station and an upper-level apparatus in a radio communication system, are provided that can estimate a communication load in a target network with high accuracy by using received quality information. A communication load estimation function (1) for estimating a communication load in a network (NW) estimates the communication load in the network by using at least a first quality indicator (Q1), which is a quality measurement value including entire received power, and a second quality indicator (Q2), which is a quality measurement value including the signal-to-noise-and-interference ratio of a reference signal.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: June 12, 2018
    Assignee: NEC Corporation
    Inventors: Hiroto Sugahara, Jun Shikida, Hiroaki Aminaka, Toshifumi Nakamura
  • D2D COMMUNICATION CONTROL APPARATUS, RADIO TERMINAL, RELAY RADIO TERMINAL CANDIDATE SELECTION METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM
    Publication number: 20180159616
    Abstract: A D2D communication control apparatus (10) according to the present invention includes: a communication unit (11) configured to receive determination information that can be used to determine whether each of a plurality of radio terminals is capable of performing device-to-device (D2D) communication with another radio terminal; and a selection unit (12) configured to select, using the determination information between radio terminals that may operate as relay radio terminals, a candidate for a relay radio terminal that relays the communication between one of the plurality of radio terminals and a network, the relay radio terminal candidate transmitting a response signal in response to a first discovery signal transmitted from one of the radio terminals by performing D2D communication with the one of the plurality of radio terminals and performing cellular communication with the network.
    Type: Application
    Filed: February 10, 2016
    Publication date: June 7, 2018
    Applicant: NEC Corporation
    Inventors: Hiroaki AMINAKA, Kazushi MURAOKA, Taichi OHTSUJI
  • WIRELESS TERMINAL APPARATUS, D2D CONTROLLER, AND METHOD
    Publication number: 20180139684
    Abstract: A wireless terminal apparatus (2) is configured, before the wireless terminal apparatus (2) is requested by another wireless terminal (1) or a D2D controller (5) to start a relay operation between the other wireless terminal (1) and the cellular network (3, 4), to hold connection information necessary to allow the other wireless terminal (1) to communicate with the cellular network (3, 4) or with a node (7) in an external network (6) via the relay operation performed by the wireless terminal apparatus (2). It is thus, for example, possible to contribute to reducing latency from when a mobile relay is requested to start a relay operation until the relay operation can be started.
    Type: Application
    Filed: January 21, 2016
    Publication date: May 17, 2018
    Applicant: NEC Corporation
    Inventors: Hiroaki AMINAKA, Kazushi MURAOKA, Taichi OHTSUJI
  • Radio communication system, radio station, radio terminal, communication control method, and non-transitory computer readable medium
    Patent number: 9961672
    Abstract: A radio terminal (3) can perform carrier aggregation using a first cell (10) of a first radio station (1) and a second cell (20) of a second radio station (2). The first radio station (1) performs, with the radio terminal (3), radio resource control for the first cell (10) and the second cell (20) in order to perform the carrier aggregation. Further, the first radio station (1) transmits, to the second radio station (2), update information regarding an update to a configuration related to the radio resource control for the second cell (20). It is thus, for example, possible to prevent or reduce data transmission/reception failures which would otherwise occur while a configuration of radio parameters or the like is being changed by a radio terminal in carrier aggregation of a plurality of cells served by different radio stations.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: May 1, 2018
    Assignee: NEC Corporation
    Inventors: Hisashi Futaki, Hiroaki Aminaka
  • APPARATUS AND METHOD FOR PROXIMITY-BASED SERVICE COMMUNICATION
    Publication number: 20180115873
    Abstract: A radio terminal apparatus (1) transmits, to a radio access network (3), resource information indicating a first radio resource to be used for sidelink communication (103), an effective period or effective number of times of the first radio resource, or both the first radio resource and the effective period or effective number of times. The sidelink communication (103) includes at least one of direct discovery and direct communication performed between the radio terminal apparatus (1) and another radio terminal (2). It is thus, for example, possible to contribute to avoidance of conflict between a radio resource for a sidelink communication and a radio resource for an intra-cell uplink transmission, intra-cell downlink transmission, or another sidelink communication.
    Type: Application
    Filed: November 30, 2015
    Publication date: April 26, 2018
    Applicant: NEC Corporation
    Inventor: Hiroaki AMINAKA
  • Radio Communication System, Radio Station, Radio Terminal, Communication Control Method, and Non-Transitory Computer Readable Medium
    Publication number: 20180115969
    Abstract: A radio terminal (3) can perform carrier aggregation using a first cell (10) of a first radio station (1) and a second cell (20) of a second radio station (2). The first radio station (1) performs, with the radio terminal (3), radio resource control for the first cell (10) and the second cell (20) in order to perform the carrier aggregation. Further, the first radio station (1) transmits, to the second radio station (2), update information regarding an update to a configuration related to the radio resource control for the second cell (20). It is thus, for example, possible to prevent or reduce data transmission/reception failures which would otherwise occur while a configuration of radio parameters or the like is being changed by a radio terminal in carrier aggregation of a plurality of cells served by different radio stations.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 26, 2018
    Applicant: NEC Corporation
    Inventors: Hisashi FUTAKI, Hiroaki AMINAKA
  • RADIO TERMINAL APPARATUS AND METHOD THEREFOR
    Publication number: 20180084425
    Abstract: A radio terminal apparatus (113) is configured to perform D2D communication with at least one radio terminal (121-124) belonging to a second group (group 2) when a predetermined condition is satisfied. The predetermined condition includes that a first radio terminal (110) belonging to a first group (group 1) to which the radio terminal apparatus (113) belongs gives the second group (group 2) implicit or explicit permission to perform D2D communication between the first and second groups (groups 1 and 2). It is thus, for example, possible to contribute to improving security of device-to-device (D2D) communication performed between D2D communication groups.
    Type: Application
    Filed: November 30, 2015
    Publication date: March 22, 2018
    Inventor: Hiroaki AMINAKA
  • Radio communication system, base station, mobile station, communication control method, and non-transitory computer readable medium
    Patent number: 9924556
    Abstract: A first base station (1) that operates a first cell (10) is configured to receive, from a mobile station (4) through a signaling radio bearer in the first cell (10), a signal containing a NAS message that causes a setup of a data bearer in a data transfer apparatus (7) within a core network (5). The first base station (1) is also configured to send, when forwarding the NAS message received from the mobile station (4) to the mobility management apparatus (6) within the core network (5), a control message that causes a suspension of the setup of the data bearer to the mobility management apparatus (6). It is thus, for example, possible to contribute to a simple establishment of a U-Plane bearer in a dual-connectivity scenario.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: March 20, 2018
    Assignee: NEC Corporation
    Inventors: Hiroaki Aminaka, Hisashi Futaki
  • APPARATUS AND METHOD FOR PROXIMITY-BASED SERVICE COMMUNICATION
    Publication number: 20180049259
    Abstract: A radio terminal (1) receives a request and a radio configuration from a network (100) when the radio terminal (1) can connect to the network (100). The request requests transmission of the radio configuration. The radio configuration includes a radio parameter for sidelink communication (102) with a second radio terminal (2) which is in a state of being unable to connect to the network (100). The sidelink communication includes at least, one of direct discovery and direct communication. The radio terminal (1) is further configured to transmit the radio configuration in response to this request, and to perform the sidelink communication in accordance with the radio configuration with the second radio terminal (2) that has received the radio configuration. It is thus, for example, possible to contribute to improvement of the sidelink communication in the partial coverage.
    Type: Application
    Filed: November 18, 2015
    Publication date: February 15, 2018
    Inventors: Hiroaki AMINAKA, Hiroto SUGAHARA
  • APPARATUS AND METHOD FOR PROXIMITY-BASED SERVICE COMMUNICATION
    Publication number: 20180049260
    Abstract: A radio terminal (1) is configured to, in response to receiving a request from a network (100) when the radio terminal (1) can connect to the network (100), perform sidelink communication (102) with a second radio terminal (2), which is in a state of being unable to connect to the network (100), in accordance with a pre-configured first radio parameter (1008). The sidelink communication (102) includes at least one of direct discovery and direct communication. It is thus, for example, possible to contribute to improvement of sidelink communication in partial coverage.
    Type: Application
    Filed: November 18, 2015
    Publication date: February 15, 2018
    Inventors: Hiroaki AMINAKA, Hiroto SUGAHARA
  • Radio communication system, radio terminal, radio network, radio communication method and program
    Patent number: 9894544
    Abstract: A radio terminal, which has a function to collect and report measurement information designated by a radio network, comprises: means for receiving collection/reporting control information related to the radio terminal's execution of at least one of the collection of measurement information and the reporting of the measurement information to the radio network; and control means for executing, based on the collection/reporting control information, at least one of the collection and the reporting if execution determination information, which is related to at least one of the collection of the measurement information and the reporting of the measurement information to be executed by the local terminal, satisfies a given determination criterion.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: February 13, 2018
    Assignee: NEC CORPORATION
    Inventors: Hisashi Futaki, Hiroaki Aminaka
  • RADIO COMMUNICATION SYSTEM, RADIO TERMINAL, RADIO NETWORK, RADIO COMMUNICATION METHOD AND PROGRAM
    Publication number: 20180041912
    Abstract: A wireless communication system comprises: a setting notifying means for notifying, to a radio terminal, setting information related to at least one of the radio terminal's collection of measurement information and the radio terminal's reporting of the measurement information to a radio network; a status notifying means for notifying, to the radio network, a status related to at least one of the radio terminal's collection of the measurement information and the radio terminal's reporting of the measurement information; and a re-establishing means for receiving the status and determining whether to re-establish the setting information.
    Type: Application
    Filed: October 20, 2017
    Publication date: February 8, 2018
    Applicant: NEC CORPORATION
    Inventors: Hisashi FUTAKI, Kosei KOBAYASHI, Hiroaki AMINAKA
  • APPARATUS AND METHOD FOR PROXIMITY-BASED SERVICE COMMUNICATION
    Publication number: 20180041886
    Abstract: A control apparatus (4) is configured to perform a network-level discovery including tracking current locations of first and second radio terminals (1A, 1B) to detect proximity of the first and second radio terminals (1A and 1B). The control apparatus (4) is configured to acquire at least a location history of the first radio terminal (1 A) before starting the network-level discovery triggered by a request for the network-level discovery issued from the first radio terminal (1A). It is thus, for example, possible to improve accuracy of a determination whether to start network-level discovery (e.g., EPC-level ProSe Discovery).
    Type: Application
    Filed: November 17, 2015
    Publication date: February 8, 2018
    Inventors: Hiroaki AMINAKA, Hisashi FUTAKI
  • APPARATUS AND METHOD FOR PROXIMITY-BASED SERVICE COMMUNICATION
    Publication number: 20180035278
    Abstract: A radio access network node (21) detects an event that triggers an occurrence of sidelink communication (103) including at least one of direct discovery and direct communication. In response to detection of the event, the radio access network node (21) acquires location information of at least one of a plurality of radio terminals (1) that participate in the sidelink communication. It is thus, for example, possible to contribute to improving sidelink communication including direct discovery and direct communication.
    Type: Application
    Filed: November 17, 2015
    Publication date: February 1, 2018
    Inventors: Hiroaki AMINAKA, Hisashi FUTAKI
  • Radio communication system, radio station, radio terminal, communication control method, and non-transitory computer readable medium
    Patent number: 9883489
    Abstract: A radio terminal (3) can perform carrier aggregation using a first cell (10) of a first radio station (1) and a second cell (20) of a second radio station (2). The first radio station (1) performs, with the radio terminal (3), radio resource control for the first cell (10) and the second cell (20) in order to perform the carrier aggregation. Further, the first radio station (1) transmits, to the second radio station (2), update information regarding an update to a configuration related to the radio resource control for the second cell (20). It is thus, for example, possible to prevent or reduce data transmission/reception failures which would otherwise occur while a configuration of radio parameters or the like is being changed by a radio terminal in carrier aggregation of a plurality of cells served by different radio stations.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: January 30, 2018
    Assignee: NEC Corporation
    Inventors: Hisashi Futaki, Hiroaki Aminaka
  • APPARATUS AND METHOD FOR PROXIMITY-BASED SERVICE COMMUNICATION
    Publication number: 20180020397
    Abstract: A radio terminal (1) updates a preconfigured radio parameter (409, 814) stored in a memory (406, 810) coupled to the radio terminal (1). The preconfigured radio parameter (409, 814) is used by the radio terminal (1) to perform at least one of discovery and direct communication without the assistance of a Public Land Mobile Network (100). This contributes, for example, to flexible adaptation to conditions under which the ProSe communication without the assistance of a network is performed.
    Type: Application
    Filed: November 5, 2015
    Publication date: January 18, 2018
    Applicant: NEC Corporation
    Inventors: Hiroaki AMINAKA, Hiroto SUGAHARA
  • USER EQUIPMENT AND METHOD FOR RESOURCE ALLOCATION
    Publication number: 20180020488
    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: September 20, 2017
    Publication date: January 18, 2018
    Inventors: Hiroaki AMINAKA, Kojiro HAMABE, Jinsock LEE