Patents by Inventor Osamu Kurokawa
Osamu Kurokawa 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).
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Patent number: 9055437Abstract: A communication system for solving a problem, in which secure communications security cannot be ensured in communications between a femtocell base station and UE, is provided. The communication system includes UE (User Equipment) and an HLR (Home Location Register) used in an IMS (IP Multimedia subsystem) network and a femtocell base station (Femto AP) that constructs a predetermined communication area. The femtocell base station exists between the UE and the HLR, acquires a concealment key corresponding to the UE from the HLR during authentication of the UE, and executes a concealment process to conceal the identity of the UE based on the concealment key.Type: GrantFiled: December 24, 2009Date of Patent: June 9, 2015Assignee: NEC CORPORATIONInventors: Osamu Kurokawa, Kazuki Eguchi, Koki Hayashi, Yuichiro Kameoka, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido
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Patent number: 9019988Abstract: When a femto cell base station used for a communication system provided with a function of providing a predetermined supplementary service receives first information indicating supplementary service control from a radio terminal, the femto cell base station converts the received information to a SIP (Session Initiation Protocol) message including the first information and transmits the SIP message to a higher apparatus in the communication system.Type: GrantFiled: June 30, 2010Date of Patent: April 28, 2015Assignee: NEC CorporationInventors: Osamu Kurokawa, Kazuki Eguchi, Naoki Yoshida, Shunsuke Yokouchi, Toru Shiiba, Tomiharu Hamguchi, Yasuyuki Ueda, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido
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Patent number: 8880094Abstract: Provided is a broadcast control apparatus that realizes broadcasting to a predetermined distribution area, as in an existing public mobile communication network in a communication system using a femto cell base station. The broadcast control apparatus includes a database, in which location information of the femto cell base station existing in a predetermined distribution area section is associated with the distribution area section. The broadcast control apparatus also includes update means for updating the association in the database based on the location information of the femto cell base station received by reception means.Type: GrantFiled: December 22, 2010Date of Patent: November 4, 2014Assignee: NEC CorporationInventors: Osamu Kurokawa, Yasuhiro Watanabe, Hiroaki Akiyama, Daisuke Nakamura, Takeshi Nishimura, Takuo Akimoto
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Publication number: 20140219252Abstract: When a representative service control device receives a PDP context succession request signal according to a handover communication procedure prescribed in an applicable standard, the representative service control device transmits a P-TMSI contained in the PDP context succession request signal as an address request to a database device. When the representative service control device receives address information of a service control device from the database device, the representative service control device forwards the PDP context succession request signal received from the request transmission means to the received address.Type: ApplicationFiled: August 27, 2012Publication date: August 7, 2014Applicant: NEC CORPORATIONInventors: Yusuke Miyagawa, Takayuki Kido, Takuo Akimoto, Osamu Kurokawa, Yuki Nakanishi, Yasuhiro Watanabe
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Publication number: 20140213260Abstract: When a representative PS server receives a P-TMSI contained in a PDP context succession request signal from a UE according to a handover communication procedure prescribed in an applicable standard after the UE moves, if the PS server identified with the identification information contained in the received P-TMSI is not its own representative PS server, the representative PS server identifies the PS server identified with the identification information as a PS server that manages a femtocell base station to which the UE belonged before it moved and forwards the PDP context succession request signal to the identified PS server.Type: ApplicationFiled: August 28, 2012Publication date: July 31, 2014Applicant: NEC CORPORATIONInventors: Yusuke Miyagawa, Takayuki Kido, Takuo Akimoto, Yuki Nakanishi, Osamu Kurokawa, Yasuhiro Watanabe
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Patent number: 8699416Abstract: A communication system that includes at least UE and an HLR that are used in an IMS network further includes: a Femto-cell base station that makes up a predetermined communication area, and a control unit for controlling at least communication between the UE and the HLR. The Femto-cell base station and the control unit are present between the UE and the HLR. The Femto-cell base station includes a transmission unit for transmitting messages received from the UE to the control unit and for transmitting messages received from the control unit to the UE. The control unit converts messages received from the Femto-cell base station to messages that can be recognized by the HLR, and converts messages received from the HLR to messages that can be recognized by the UE.Type: GrantFiled: December 21, 2009Date of Patent: April 15, 2014Assignees: NEC Corporation, NEC Commuication Systems Ltd.Inventors: Osamu Kurokawa, Kazuki Eguchi, Yasuo Kanazawa, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido, Akatsuki Minami
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Patent number: 8670443Abstract: A femto-cell base station acquires an IP address of a CS-dedicated relay device from a first management device, connects to the CS-dedicated relay device based on the acquired IP address of the CS-dedicated relay device, and establishes a first IPsec Tunnel between the femto-cell base station and the CS-dedicated relay device. The femto-cell base station also acquires an IP address of a PS-dedicated relay device from a second management device through the first IPsec Tunnel, connects to the PS-dedicated relay device based on the acquired IP address of the PS-dedicated relay device, and establishes a second IPsec Tunnel between the femto-cell base station and the PS-dedicated relay device.Type: GrantFiled: December 24, 2009Date of Patent: March 11, 2014Assignee: NEC CorporationInventors: Osamu Kurokawa, Yuki Nakanishi, Yoshio Wada
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Patent number: 8649767Abstract: A Femtocell base station has a determination means and a transmission means. The determination means, upon receiving a location update request message from UE (User Equipment), determines whether a first message that prompts the UE to again attempt a location update should be transmitted to the UE, whether a second message that prompts the UE to divert to another network should be transmitted to the UE, or whether a third message that notifies the UE that the location update request is accepted should be transmitted to the UE. The transmission means transmits to the UE either the first message, or the second message, or the third message in accordance with the determination of the determination means.Type: GrantFiled: April 5, 2010Date of Patent: February 11, 2014Assignee: NEC CorporationInventors: Osamu Kurokawa, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido, Takuo Akimoto, Yusuke Miyagawa
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Publication number: 20140038565Abstract: A Femtocell base station has a determination means and a transmission means. The determination means, upon receiving a location update request message from UE (User Equipment), determines whether a first message that prompts the UE to again attempt a location update should be transmitted to the UE, whether a second message that prompts the UE to divert to another network should be transmitted to the UE, or whether a third message that notifies the UE that the location update request is accepted should be transmitted to the UE. The transmission means transmits to the UE either the first message, or the second message, or the third message in accordance with the determination of the determination means.Type: ApplicationFiled: October 11, 2013Publication date: February 6, 2014Applicant: NEC CORPORATIONInventors: OSAMU KUROKAWA, YASUHIRO WATANABE, HIROAKI AKIYAMA, TAKAYUKI KIDO, TAKUO AKIMOTO, YUSUKE MIYAGAWA
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Publication number: 20140038595Abstract: A Femtocell base station has a determination means and a transmission means. The determination means, upon receiving a location update request message from UE (User Equipment), determines whether a first message that prompts the UE to again attempt a location update should be transmitted to the UE, whether a second message that prompts the UE to divert to another network should be transmitted to the UE, or whether a third message that notifies the UE that the location update request is accepted should be transmitted to the UE. The transmission means transmits to the UE either the first message, or the second message, or the third message in accordance with the determination of the determination means.Type: ApplicationFiled: October 11, 2013Publication date: February 6, 2014Applicant: NEC CORPORATIONInventors: OSAMU KUROKAWA, YASUHIRO WATANABE, HIROAKI AKIYAMA, TAKAYUKI KIDO, TAKUO AKIMOTO, YUSUKE MIYAGAWA
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Patent number: 8620378Abstract: A Femto Access Point includes determination means for determining whether or not called side user equipment is accommodated in the Femto Access Point; and communication control means for, if the determination means has determined that the called side user equipment is accommodated in the Femto Access Point, sending out a Ring Back Tone to calling side user equipment.Type: GrantFiled: December 21, 2009Date of Patent: December 31, 2013Assignee: Nec CorporationInventors: Osamu Kurokawa, Kazuki Eguchi, Naoki Yoshida, Shunsuke Yokouchi, Yasuhiro Watanabe, Hiroaki Akiyama, Takuo Akimoto
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Publication number: 20130310028Abstract: In order to enable a communication system introduced with a femtocell base station using an IMS network, to perform PS service similar to that of the existing 3G network, a service control apparatus (SGSN functional unit), based on the UE's message transmitted to the femtocell base station (FAP), acquires UE's subscriber information for PS (Packet Switching) service, from a HLR and registers the subscriber information in a VLR that is present on the IMS network. Then, service control apparatus performs PS service based on the subscriber information registered in the VLR.Type: ApplicationFiled: June 22, 2012Publication date: November 21, 2013Applicant: NEC CORPORATIONInventors: Yusuke Miyagawa, Takayuki Kido, Takuo Akimoto, Osamu Kurokawa, Yuki Nakanishi, Yasuhiro Watanabe
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Publication number: 20130072199Abstract: In order to realize hand over between an existing communication network and an FAP in a communication system with a different communication procedure, without requiring improvement of an existing communication system, a gateway device and the Femto Access Point configure virtual RNC means which is recognized as an RNC by an RNC when communication with the RNC is performed, and if the hand over is performed between a BTS and the Femto Access Point, the virtual RNC means transmits and receives a message containing hand over information for call control to and from the RNC.Type: ApplicationFiled: July 14, 2011Publication date: March 21, 2013Applicant: NEC CORPORATIONInventors: Yusuke Miyagawa, Yasuhiro Watanabe, Takayuki Kido, Takuo Akimoto, Osamu Kurokawa
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Publication number: 20130065606Abstract: Provided is a broadcast control apparatus that realizes broadcasting to a predetermined distribution area, as in an existing public mobile communication network in a communication system using a femto cell base station. The broadcast control apparatus includes a database, in which location information of the femto cell base station existing in a predetermined distribution area section is associated with the distribution area section. The broadcast control apparatus also includes update means for updating the association in the database based on the location information of the femto cell base station received by reception means.Type: ApplicationFiled: December 22, 2010Publication date: March 14, 2013Applicant: NEC CORPORATIONInventors: Osamu Kurokawa, Yasuhiro Watanabe, Hiroaki Akiyama, Daisuke Nakamura, Takeshi Nishimura, Takuo Akimoto
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Publication number: 20120270529Abstract: When a femto cell base station used for a communication system provided with a function of providing a predetermined supplementary service receives first information indicating supplementary service control from a radio terminal, the femto cell base station converts the received information to a SIP (Session Initiation Protocol) message including the first information and transmits the SIP message to a higher apparatus in the communication system.Type: ApplicationFiled: June 30, 2010Publication date: October 25, 2012Applicant: NEC CORPORATIONInventors: Osamu Kurokawa, Kazuki Eguchi, Naoki Yoshida, Shunsuke Yokouchi, Toru Shiiba, Tomiharu Hamguchi, Yasuyuki Ueda, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido
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Publication number: 20120258686Abstract: A femto cell base station includes a generating part that generates a SIP message including a terminal ID of a radio terminal and a check request for the terminal ID at a predetermined time, and a first transmitting part that transmits the SIP message generated by the generating part to a higher level apparatus in the communication system.Type: ApplicationFiled: July 20, 2010Publication date: October 11, 2012Applicant: NEC CORPORATIONInventors: Osamu Kurokawa, Kazuki Eguchi, Naoki Yoshida, Shunsuke Yokouchi, Toru Shiiba, Yasuyuki Ueda, Tomiharu Hamaguchi, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido
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Publication number: 20120258743Abstract: A femtocell base station (FAP) converts, when information concerning a SMS is received from UE (User Equipment), the received information concerning the SMS into a SIP (Session Initiation Protocol) message including the received information concerning the SMS and transmits the converted SIP message to the core network side. The femtocell base station converts, when a SIP message including information concerning the SMS is received from the core network side, the information concerning the SMS included in the received SIP message into a message that can be recognized by the UE and transmits the converted information concerning the SMS to the UE.Type: ApplicationFiled: June 30, 2010Publication date: October 11, 2012Applicant: NEC CORPORATIONInventors: Osamu Kurokawa, Kazuki Eguchi, Naoki Yoshida, Shunsuke Yokouchi, Toru Shiiba, Yasuyuki Ueda, Tomiharu Hamaguchi, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido
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Publication number: 20120002649Abstract: A femto-cell base station acquires an IP address of a CS-dedicated relay device from a first management device, connects to the CS-dedicated relay device based on the acquired IP address of the CS-dedicated relay device, and establishes a first IPsec Tunnel between the femto-cell base station and the CS-dedicated relay device. The femto-cell base station also acquires an IP address of a PS-dedicated relay device from a second management device through the first IPsec Tunnel, connects to the PS-dedicated relay device based on the acquired IP address of the PS-dedicated relay device, and establishes a second IPsec Tunnel between the femto-cell base station and the PS-dedicated relay device.Type: ApplicationFiled: December 24, 2009Publication date: January 5, 2012Inventors: Osamu Kurokawa, Yuki Nakanishi, Yoshio Wada
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Publication number: 20110305196Abstract: A communication system that includes at least UE and an HLR that are used in an IMS network further includes: a Femto-cell base station that makes up a predetermined communication area, and a control unit for controlling at least communication between the UE and the HLR. The Femto-cell base station and the control unit are present between the UE and the HLR. The Femto-cell base station includes a transmission unit for transmitting messages received from the UE to the control unit and for transmitting messages received from the control unit to the UE. The control unit converts messages received from the Femto-cell base station to messages that can be recognized by the HLR, and converts messages received from the HLR to messages that can be recognized by the UE.Type: ApplicationFiled: December 21, 2009Publication date: December 15, 2011Inventors: Osamu Kurokawa, Kazuki Eguchi, Yasuo Kanazawa, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido, Akatsuki Minami
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Publication number: 20110269427Abstract: A Femtocell base station has a determination means and a transmission means. The determination means, upon receiving a location update request message from UE (User Equipment), determines whether a first message that prompts the UE to again attempt a location update should be transmitted to the UE, whether a second message that prompts the UE to divert to another network should be transmitted to the UE, or whether a third message that notifies the UE that the location update request is accepted should be transmitted to the UE. The transmission means transmits to the UE either the first message, or the second message, or the third message in accordance with the determination of the determination means.Type: ApplicationFiled: April 5, 2010Publication date: November 3, 2011Inventors: Osamu Kurokawa, Yasuhiro Watanabe, Hiroaki Akiyama, Takayuki Kido, Takuo Akimoto, Yusuke Miyagama