Patents by Inventor Minami Ishii

Minami Ishii 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: 10154441
    Abstract: A mobile communication method according to the present invention includes the steps: transmitting, from an exchange (MME) to a first radio base station (eNB), a location information reporting instruction which provides an instruction to report location information on a mobile station (UE); reporting, the first radio base station (eNB) to the exchange (MME), the location information on the mobile station (UE), in accordance with the location information reporting instruction; transmitting, the location information reporting instruction to a second radio base station (eNB), in a handover procedure of the mobile station (UE) from the first radio base station (eNB) to the second radio base station (eNB); and reporting, from the second radio base station (eNB) to the exchange (MME), the location information on the mobile station (UE), in accordance with the location information reporting instruction.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: December 11, 2018
    Assignee: NTT DOCOMO, INC.
    Inventors: Wuri Andarmawanti Hapsari, Minami Ishii, Takehiro Nakamura
  • Patent number: 9894566
    Abstract: A mobile communication method involving performing, at a mobile station UE which establishes a first connection in a first cell, a cell selection process at the time of detecting a failure in the first connection, transmitting, from the mobile station UE to a second cell selected in the cell selection process, a connection re-establishment request signal, determining, at a radio base station that manages the second cell, whether or not to store context information of the mobile station UE in response to the connection re-establishment request signal, acquiring, at the radio base station, the context information of the mobile station UE from a radio base station that manages the first cell, when determining that the context information of the mobile station UE is not stored, and establishing a second connection in the second cell for the mobile station UE, based on the context information of the mobile station UE.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: February 13, 2018
    Assignee: NTT DOCOMO, INC.
    Inventors: Mikio Iwamura, Minami Ishii
  • Patent number: 9706474
    Abstract: When a network is requiring access barring, a mobile device determines whether a reference value broadcasted to the mobile device indicates a value determining that an access is denied regardless of a numerical value generated by the mobile device, or indicates a value having a possibility that an access of a certain mobile device is denied while an access of another mobile device is allowed. In the latter case, the mobile device determines appropriateness of an access by performing predetermined processing using the reference value as a value to be checked for a relationship with a numerical value generated by the mobile device when the mobile device does not have a special type access class, and uses a value enabling allowance of an access without performing the predetermined processing as a value for determining appropriateness of an access when the mobile device has the special type access class.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: July 11, 2017
    Assignee: NTT DOCOMO, INC.
    Inventors: Kenichiro Aoyagi, Mikio Iwamura, Minami Ishii, Mutsumi Ishimoto
  • Patent number: 9264983
    Abstract: A mobile communication method according to the present invention includes: notifying, from a network node (200, 300) to a mobile station (100), a communication service provided by a target radio access technology in which the mobile station (100) is to be in idle mode; storing, at the mobile station (100), the communication service notified by the network node (200, 300); and starting, at the mobile station (100), a connection procedure on the basis of the stored communication service.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: February 16, 2016
    Assignee: NTT DOCOMO, INC.
    Inventors: Minami Ishii, Takehiro Nakamura
  • Patent number: 9265062
    Abstract: A mobile communication system is provided that performs bi-directional communications between a mobile station and a wireless access network device. The mobile station includes a connection set-up signal reception timing calculation unit for calculating a reception timing of a connection set-up signal when a connection request signal is transmitted, and a connection set-up signal reception determination unit that determines, according to the reception timing, whether the connection set-up signal is received, and performs a signal reception operation based on the determination.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: February 16, 2016
    Assignee: NTT DOCOMO, INC.
    Inventors: Minami Ishii, Anil Umesh, Sadayuki Abeta, Takehiro Nakamura
  • Patent number: 9220056
    Abstract: When a network is in a state of requiring any sort of access barring, determining whether a special type access class is included as an access class to which an own device belongs, determining appropriateness of an access by referring to, from barring information, a first barring information for designating whether a mobile device belonging to each access class is subject to access barring when having determined that the special type access class is included, and determining the appropriateness of an access by referring to, from the barring information, second barring information indicating a value serving as a reference for determining the appropriateness of an access according to a relationship between a numerical value generated by each mobile device and the reference indicated by the second barring information when having determined that the special type access class is included.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: December 22, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Mikio Iwamura, Minami Ishii, Mutsumi Ishimoto
  • Patent number: 9215629
    Abstract: A mobile communication method according to the present invention includes: a step of a mobile switching center MME managing access information that defines accessible CSG-ID of a mobile station UE; a step of the mobile switching center MME accommodating a combination of eNB-IDs and CSG-IDs of a radio base station HeNB2 from a gateway device HeNB-GW; and a step of the mobile switching center MME determining whether the mobile station UE is accessible to the radio base station HeNB2 based on identification information of the mobile station UE and eNB-ID of the radio base station HeNB2 included in “HO Required” received from the radio base station eNB, which are included in the handover request signal, with reference to the access information and the combination.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: December 15, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Wuri Andarmawanti Hapsari, Hideaki Takahashi, Anil Umesh, Mikio Iwamura, Minami Ishii, Takeshi Okamoto
  • Patent number: 9185633
    Abstract: A radio base station that includes an upper-layer information transmission unit configured to transmit a length of Cyclic Prefix (CP) used in neighboring cells and a Positioning Reference Signal (PRS) transmission unit configured to transmit the PRS generated based on the length of CP, in a subordinate cell included in the neighboring cells.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: November 10, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Minami Ishii, Sadayuki Abeta
  • Patent number: 9184831
    Abstract: A mobile communication method according to the present invention comprising a step A in which, when a predetermined trigger is detected, the radio base station DeNB notifies the relay node RN of a transmission timing of an MBSFN subframe by a signal for changing the configuration of an RRC connection that is set between the radio base station DeNB and the relay node RN, a step B in which the radio base station DeNB performs scheduling such that a downlink signal is transmitted to the relay node RN at the transmission timing of the MBSFN subframe, and a step C in which the relay node RN performs scheduling such that a downlink signal is transmitted at a timing other than the transmission timing of the MBSFN subframe.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: November 10, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Wuri Andarmawanti Hapsari, Anil Umesh, Mikio Iwamura, Minami Ishii
  • Publication number: 20150230133
    Abstract: A system for enabling broadcasting of broadcast information to a mobile station UE camping on a phantom cell is disclosed. A mobile communication system transmits reference instruction information to a mobile station UE camping on or communicating in any of phantom cells #1 to #13, the reference instruction information instructing the mobile station UE to refer to broadcast information in a macro cell #A which the mobile station UE does not camp on or is not communicating in.
    Type: Application
    Filed: August 22, 2013
    Publication date: August 13, 2015
    Applicant: NTT DOCOMO, INC.
    Inventors: Kenichiro Aoyagi, Minami Ishii, Wuri Andarmawanti Hapsari
  • Patent number: 9084182
    Abstract: When a network is in a state of requiring some sort of access barring, a reference value notified to a mobile device is determined to indicate a value in which an access of a certain mobile device is denied while an access of another mobile device is allowed. When an own device has a special type access class, it is determined that an access is allowed The appropriateness of an access is determined according to designation from the network when the own device has the special type access class, and when the own device does not have the special type access class, it is determined that an access is denied.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: July 14, 2015
    Assignee: NIT DOCOMO, INC.
    Inventors: Mikio Iwamura, Minami Ishii, Mutsumi Ishimoto
  • Patent number: 9036551
    Abstract: A base station includes a radio communication unit (82, 85) configured to wirelessly communicate with a mobile apparatus capable of communicating in both a first mobile communication system and a second mobile communication system and a network communication unit (83, 84) configured to communicate with a switching station in the first mobile communication system, and if a line setup instruction signal (Initial Context Setup Request) received at the network communication unit from the switching station is not due to initial access to the switching station by the mobile apparatus, the radio communication unit receives mobile apparatus capability information in the second mobile communication system (UE-UTRA-Capability) from the mobile apparatus after transmitting a line setup response signal (Initial Context Setup Response) to the switching station.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: May 19, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Tadashi Uchiyama, Kazunori Obata, Seigo Harano, Shogo Yabuki, Minami Ishii
  • Publication number: 20150119060
    Abstract: When a network is requiring access barring, a mobile device determines whether a reference value broadcasted to the mobile device indicates a value determining that an access is denied regardless of a numerical value generated by the mobile device, or indicates a value having a possibility that an access of a certain mobile device is denied while an access of another mobile device is allowed. In the latter case, the mobile device determines appropriateness of an access by performing predetermined processing using the reference value as a value to be checked for a relationship with a numerical value generated by the mobile device when the mobile device does not have a special type access class, and uses a value enabling allowance of an access without performing the predetermined processing as a value for determining appropriateness of an access when the mobile device has the special type access class.
    Type: Application
    Filed: May 21, 2013
    Publication date: April 30, 2015
    Inventors: Kenichiro Aoyagi, Mikio Iwamura, Minami Ishii, Mitsumi Ishimoto
  • Patent number: 8977266
    Abstract: A radio base station includes a mobile communication system, a relay node and a radio base station connected via a radio bearer. A mobile station is configured to perform a handover process between a state in which a radio bearer is set with the relay node so as to communicate via the relay node and the radio base station, and a state in which a radio bearer is set with the radio base station so as to communicate via the radio base station. The handover process is configured such that a data signal is transferred via the radio bearer between the relay node and the radio base station.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: March 10, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Wuri Andarmawanti Hapsari, Anil Umesh, Mikio Iwamura, Minami Ishii
  • Patent number: 8976760
    Abstract: To provide a communication control system and a communication control method, in which call connection delay can be reduced even in a case where a resource capable of continuing an established communication bearer in a radio communication system in a transition destination cannot be captured when a mobile station transitions to another radio communication system. An eNB 110 includes a handover control unit 115 configured to determine whether a handover of a PS bearer to a 3G system 20 is performed based on the priority of the PS bearer to the CS bearer when a connection destination of a mobile station 300 being in connection with an LTE system 10 using the PS bearer is switched to the 3G system 20.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: March 10, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Kenichiro Aoyagi, Hideaki Takahashi, Minami Ishii
  • Patent number: 8971230
    Abstract: A radio base station apparatus (10) according to the present invention includes: an uplink resource assignor unit (13) configured to assign an uplink resource to a mobile station (01) in response to a random access signal which the mobile station (01) transmits by use of a random access preamble; a random access response signal transmitter unit (14) configured to notify the mobile station (01) of the uplink resource by using a random access response signal; and an uplink scramble decoder unit (16) configured to perform descrambling processing on an uplink signal transmitted from the mobile station (01) by use of the uplink resource, by using an uplink scrambling sequence corresponding to the uplink resource.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: March 3, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Minami Ishii, Sadayuki Abeta
  • Patent number: 8917701
    Abstract: A mobile communication method according to the present invention includes: a step in which a mobile station UE transmits “Measurement Report” including identification information “ECGI” on a cell subordinate to a radio base station eNB, to a radio base station HeNB; a step in which a radio base station HeNB transmits “(X2) HO Request” including the identification information “ECGI” of the cell subordinate to the radio base station eNB, to an IP address of a gateway device HeNB-GW; and a step in which the gateway device HeNB-GW transfers the “(X2) HO Request” to the IP address corresponding to the identification information “ECGI” on the cell subordinate to the radio base station eNB.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: December 23, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hideaki Takahashi, Wuri Andarmawanti Hapsari, Takeshi Okamoto, Hiroyuki Hosono, Minami Ishii
  • Patent number: 8885543
    Abstract: Interference to a reception circuit of a relay node itself is reduced, which occurs when transmission-and-reception process in a Un radio bearer and transmission-and-reception process in a Uu radio bearer are simultaneously performed. A mobile communication method according to the present invention includes a step of determining, by a relay node RN, whether it is necessary to perform the scheduling of a second timing such that the second timing does not overlap a first timing in a time direction, based on a first operating frequency f1 used in a radio zone between the relay node RN and a mobile station UE and a second operating frequency f2 used in a radio zone between a radio base station DeNB and the relay node RN, and a step of notifying, by the relay node RN, the radio base station DeNB of the determination result.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: November 11, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hideaki Takahashi, Wuri Andarmawanti Hapsari, Anil Umesh, Mikio Iwamura, Minami Ishii
  • Patent number: 8849284
    Abstract: A mobile communication method according to the present invention includes the steps of: when a gateway apparatus (S-GW) is switched from a first state where downlink data is transmitted to a first radio access apparatus to a second state where the downlink data is transmitted to a second radio access apparatus, transferring, from the first radio access apparatus to the second radio access apparatus, the downlink data which is received from the gateway apparatus and to which specific information is added; and transmitting, from the second radio access apparatus to a mobile station (UE), transfer downlink data which is transferred from the first radio access apparatus and to which the specific information is added, before new downlink data transmitted from the gateway apparatus (S-GW).
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: September 30, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Wuri Andarmawanti Hapsari, Minami Ishii, Keisuke Suzuki, Hiroto Tooyama, Yoshifumi Morihiro
  • Patent number: 8848663
    Abstract: A radio base station including a mobile communication system, a first relay node and a second relay node which are connected via a radio bearer, the second relay node and a radio base station which are connected via a radio bearer, where a mobile station is configured to perform a handover process between a first state, in which a radio bearer is set with the first relay node in order to communicate via the first relay node, the second relay node, and the radio base station, and a second state, in which a radio bearer is set with the radio base station in order to communicate via the radio base station, and a mobile station is configured such that during the handover process. Control signals involved in the handover process are sent and received via the radio bearer between the first relay node and the second relay node and via the radio bearer between the second relay node and the radio base station.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: September 30, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Wuri Andarmawanti Hapsari, Hideaki Takahashi, Anil Umesh, Mikio Iwamura, Minami Ishii