Patents by Inventor Takuya SHIMOJOU

Takuya SHIMOJOU 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: 10827031
    Abstract: In a communication system (1) including a terminal (10), a base station (20), a processing server (30) that executes a process related to the terminal, and one or a plurality of serving gateways (40), the processing server (30) includes: a determination unit (31) that determines whether or not an unused bearer other than a used bearer used for a service process is to be established on the basis of a system load for bearer maintenance and a system load for bearer establishment when the determination unit receives a service processing request from the terminal that is in an idle state; and a bearer establishment control unit (32) that performs control so that the unused bearer determined to be established by the determination unit (31) and the used bearer are established between a corresponding serving gateway and the terminal.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: November 3, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Masayoshi Shimizu, Atsushi Minokuchi, Takuya Shimojou
  • Patent number: 10772037
    Abstract: In a communication system (1), when there is no access destination corresponding to a service type to be used by a piece of UE (50) in one of cellular communication and non-cellular communication, a retrieval unit (13) of a DB server (10) selects an access destination by referring to correspondence information in the other of the cellular communication and the non-cellular communication. Thus, when there is no access destination corresponding to the service type to be used by the UE (50) in one of the cellular communication and the non-cellular communication, the access destination corresponding to the service type is selected in the other of the cellular communication and the non-cellular communication. Therefore, it is possible to select an access destination suitable for the service type from both the cellular communication and the non-cellular communication.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: September 8, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Daisuke Nojima, Akira Yamada, Shigeru Iwashina
  • Patent number: 10715404
    Abstract: A slice changing device is disclosed including a circuitry configured to acquire, in a case where a condition for changing a slice is satisfied, a connection destination of a slice after change. The circuitry is further configured to notify a communication device that connects a terminal using a slice and a connection destination of a slice of the acquired connection destination, and to release a resource relating to a slice before change after notification by the notifying means, where a service which is used by the terminal is allocated to a slice, and in a case where a condition in which the slice is changed is satisfied, the service is allocated to a slice after change.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: July 14, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Shigeru Iwashina
  • Patent number: 10687385
    Abstract: In a communication system in which a plurality of bearers are set up between UE and one or more PGWs, a PGW measures an idle time for each bearer and determines whether or not the measured idle time has reached an idle timer threshold value which is determined in advance for each of the plurality of bearers (Step 1). Then, when it is determined that the idle time for one bearer, for example, bearer 2, has reached the idle timer threshold value (Step 2), a PGW2 requests an MME to release bearer 2 via an SGW2 (Steps 3 and 4), and the MME performs a process of releasing bearer 2 in response to the request (Step 5 and the like).
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: June 16, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Atsushi Minokuchi, Shigeru Iwashina, Srisakul Thakolsri, Malla Reddy Sama
  • Publication number: 20200187182
    Abstract: In a service mapping apparatus, an allocation service table, which associates a service to which a slice is allocated in advance, the slice, and an address representing an apparatus executing the service with each other, is stored. In addition, a request accepting unit of the service mapping apparatus receives an SLA-SL that is a requirement of a function. A determination unit determines a slice including an SLA-SL corresponding to the received service requirement (SLA-SL) of the service (satisfying the service requirement). In a case in which a service that is the allocation target is associated with a slice in advance, an allocation unit changes allocation of the service to the determined slice.
    Type: Application
    Filed: March 2, 2017
    Publication date: June 11, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya SHIMOJOU, Masayoshi SHIMIZU, Shigeru IWASHINA
  • Publication number: 20200178166
    Abstract: An object is that, in a mobile communication, a communication terminal that performs a non-cellular communication can access a service network that provides a service. A network access method to be performed by a communication system 8 forming a core network of the mobile communication and to cause a UE 7 performing the non-cellular communication to access a slice 5 providing the service comprises: an acquisition step of acquiring from the UE 7, terminal identification information identifying the UE 7; and an access step of referring to correspondence information correlating the UE 7 and the slice 5, and causing the UE 7 to access the slice 5 correlated with the UE 7 identified by the terminal identification information acquired in the acquisition step.
    Type: Application
    Filed: July 11, 2018
    Publication date: June 4, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Srisakul Thakolsri, Malla Reddy Sama
  • Publication number: 20200178139
    Abstract: A communication system is disclosed in which communication control is performed for a slice which is a virtual network accessible by a mobile terminal from any of a plurality of mobile communication networks with different communication schemes, the communication system including a communication control device arranged to perform communication connection control for the slice in each of the plurality of mobile communication networks, wherein the communication control device arranged in one mobile communication network among the plurality of mobile communication networks includes a search unit that searches for another communication control device arranged in another mobile communication network if an instruction to switch the mobile communication network with which the mobile terminal has a communication connection is received; and a communication unit that takes over communication control information for the communication connection control with the other communication control device.
    Type: Application
    Filed: June 19, 2018
    Publication date: June 4, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Malla Reddy Sama, Srisakul Thakolsri
  • Patent number: 10652813
    Abstract: A slice management system (1) is a slice management system managing slices that are virtual networks generated on a network infrastructure, comprises a memory storing a priority list in which slices of connection destination candidates of a UE (2) are aligned in order of priority levels and, in a case in which a connection request for a slice from the UE (2) is acquired, determines a slice to which UE (2) is to be connected on the basis of the priority list stored in the memory.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: May 12, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Tomoki Shibahara, Atsushi Minokuchi, Masayoshi Shimizu, Ashiq Khan, Kazuaki Obana, Srisakul Thakolsri, Malla Reddy Sama, Wolfgang Kiess, Joan Triay Marques
  • Publication number: 20200137678
    Abstract: A network operating device is disclosed that serves as a slice management device and assigns a service to slices that are virtual networks generated on a network infrastructure. The slices are being arranged in a plurality of stages of a communication path along which communication is performed between a user equipment as a user terminal and a service server providing the service. The network operating device includes an information acquiring unit that acquires a slice setting request including a service requirement, a slice setting policy determining unit that determines a slice setting policy for setting slices, and a slice setting unit that performs a process relating to the settings of the slices in the plurality of stages on the basis of the setting policy.
    Type: Application
    Filed: February 15, 2018
    Publication date: April 30, 2020
    Applicant: NTT Docomo, Inc.
    Inventors: Yuki KATSUMATA, Shigeru IWASHINA, Akira YAMADA, Takuya SHIMOJOU
  • Publication number: 20200113001
    Abstract: A mobile communication system is a mobile communication system that controls a connection with a slice which is a virtual network generated on a network infrastructure, and includes a request receiving unit 12 that receives a request for a connection with a slice of a control target of an AMF 100 from a UE 140 used by a user and a selection information transmitting unit 14 that controls, in response to the reception of the request, the connection of the UE 140 with the slice, acquires selection information for selecting a slice of a control target of another AMF 100x different from the AMF 100, and transmits the selection information to the terminal.
    Type: Application
    Filed: March 9, 2018
    Publication date: April 9, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Shigeru Iwashina, Ashiq Khan, Masayoshi Shimizu, Atsushi Minokuchi, Malla Reddy Sama, Srisakul Thakolsri, Irfan Ali
  • Patent number: 10616854
    Abstract: An SGW-C acquires correlation information in advance and retrieves an SGW-U corresponding to a tracking area of a movement destination of UE with reference to the correlation information. An MME issues a request for connection between the SGW-U retrieved by the SGW-C and an eNB. In this way, since the correlation information in which SGW-Us and tracking areas are correlated with each other is stored, it is possible to appropriately change a tracking area even in a situation in which a control plane and a user plane are separated.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: April 7, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Atsushi Minokuchi, Tomoki Shibahara, Masayoshi Shimizu
  • Publication number: 20200045624
    Abstract: An NSSF (69) includes: a selection unit selecting a slice corresponding to a service related to a request from a terminal (10) and a target processing server corresponding to the slice based on slice correspondence information including information where a slice, a processing server corresponding to the slice, and a service used by a terminal are associated with one another; and a notification unit notifying an AMF (30) of selection result including information regarding the slice and target processing server. The AMF includes: a determination processing unit determining whether the AMF is a target processing server based on information on the target processing server in the selection result information, and performing processing for a service when the AMF is the target processing server, or transferring a request for processing for a service to the target processing server when the AMF is not the target processing server.
    Type: Application
    Filed: April 27, 2018
    Publication date: February 6, 2020
    Applicant: NTT DOCOMO, Inc.
    Inventors: Takuya Shimojou, Atsushi Minokuchi, Ashiq Khan, Srisakul Thakolsri, Malla Reddy Sama, Joan Triay Marques, Irfan Ali
  • Publication number: 20200029374
    Abstract: A mobile communication system 8 is a mobile communication system comprising a core network comprising a RAN 3 (a radio access network), an SM 2 (a session management function) that manages a session between a UE 4 (a mobile communication terminal) and an MM 1 (a mobility management function) that manages mobility of the UE 4, and the SM 2 comprises a communication path establishment unit 22 that establishes a communication path enabling communication between the SM 2 and a node of the RAN 3 without passing through the MM 1. The communication path establishment unit 22 may establish a communication path when the communication path establishment unit 22 receives the session construction request at the time of attachment of the UE 4 from the MM 1.
    Type: Application
    Filed: September 21, 2017
    Publication date: January 23, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Atsushi Minokuchi, Shigeru Iwashina, Srisakul Thakolsri, Malla Reddy Sama, Irfan Ali
  • Publication number: 20200029273
    Abstract: In a communication system (1), when there is no access destination corresponding to a service type to be used by a piece of UE (50) in one of cellular communication and non-cellular communication, a retrieval unit (13) of a DB server (10) selects an access destination by referring to correspondence information in the other of the cellular communication and the non-cellular communication. Thus, when there is no access destination corresponding to the service type to be used by the UE (50) in one of the cellular communication and the non-cellular communication, the access destination corresponding to the service type is selected in the other of the cellular communication and the non-cellular communication. Therefore, it is possible to select an access destination suitable for the service type from both the cellular communication and the non-cellular communication.
    Type: Application
    Filed: September 20, 2017
    Publication date: January 23, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Daisuke Nojima, Akira Yamada, Shigeru Iwashina
  • Publication number: 20200022074
    Abstract: In a communication system (1), a communication service to be used by a piece of UE (30) that has requested access is identified, and an ePDG (40) or a PGW (60) is dynamically selected on the basis of the identified communication service. Thus, it is possible to appropriately provide a communication service requested by a user. Therefore, it is possible to dynamically select the ePDG (40) or the PGW (60) according to requirements of the service requested by the UE (30) (for example, requirements of a network for executing a service). Accordingly, it is possible to provide a suitable communication service to a user of the UE (30) who uses a plurality of services.
    Type: Application
    Filed: September 20, 2017
    Publication date: January 16, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Daisuke Nojima, Masayoshi Shimizu, Akira Yamada, Shigeru Iwashina
  • Patent number: 10492134
    Abstract: In a communications system (1A), a communication service which is utilized by UE (10) is specified from among a first communication service and a second communication service, an address of a SGW (80) corresponding to a service type of the first communication service is retrieved when the specified communication service is the first communication service with reference to information in which the specified communication service and the address of the SGW (80) that transmits and receives data for utilizing the communication service are correlated with each other, and a SGW (80) other than a first communication control device is retrieved when the specified communication service is the second communication service.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: November 26, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Motoshi Tamura, Ashiq Khan, Srisakul Thakolsri, Malla Reddy Sama, Wolfgang Kiess, Sergio Beker
  • Patent number: 10390181
    Abstract: A terminal connected to a plurality of user planes retains information on a tracking area where service areas of the plurality of user planes overlap each other as a tracking area identity list. When the terminal moves to the outside of a tracking area described in the tracking area identity list (a tracking area where a plurality of service areas overlap each other), the terminal transmits information on a tracking area after movement and an update request of the tracking area identity list to an MME. The MME creates, as a new tracking area identity list based on the update request, information on a tracking area where service areas in a plurality of user planes overlap in which a tracking area after movement is considered as a service area, and notifies the terminal of the new tracking area identity list for updating a current tracking area identity list.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: August 20, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Masayoshi Shimizu, Atsushi Minokuchi, Takuya Shimojou
  • Patent number: 10374937
    Abstract: An integrated control device, to implement automatic address assignment in a path spanning two or more administrative domains, and to implement communication between a plurality of administrative domains, acquires definition information that defines protocols used in each administrative domain from an inter-administrative domain communication protocol stack list table, acquires available addresses of each protocol in each administrative domain which can be used for communication between the respective administrative domains from an available address range table, acquires a communication route from a starting point administrative domain to an ending point administrative domain, specifies domains that use the respective protocols on the communication route by using the definition information, assigns protocol information such as available addresses of each protocol between the specified domains by using an available address range table and notifies the assigned address to each domain.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: August 6, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Youhei Katayama, Motoshi Tamura, Ashiq Khan, Takuya Shimojou
  • Publication number: 20190230734
    Abstract: In a communication system in which a plurality of bearers are set up between UE and one or more PGWs, a PGW measures an idle time for each bearer and determines whether or not the measured idle time has reached an idle timer threshold value which is determined in advance for each of the plurality of bearers (Step 1). Then, when it is determined that the idle time for one bearer, for example, bearer 2, has reached the idle timer threshold value (Step 2), a PGW2 requests an MME to release bearer 2 via an SGW2 (Steps 3 and 4), and the MME performs a process of releasing bearer 2 in response to the request (Step 5 and the like).
    Type: Application
    Filed: September 20, 2017
    Publication date: July 25, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Atsushi Minokuchi, Shigeru Iwashina, Srisakul Thakolsri, Malla Reddy Sama
  • Patent number: 10356663
    Abstract: A slice allocating method capable of dynamically changing a service and a slice to be allocated to the service is provided. An OSS/BSS holds allocation service information in which a service to which a slice has been allocated is associated with the slice. Further, a request reception unit of the OSS/BSS receives an SLA-SL which is a requirement of a function. An allocation determination unit determines a slice having an SLA-SL corresponding to a service requirement of the received service. When the service of the slice determined by the allocation determination unit is the same as the service associated with the slice in advance, an allocation request unit reallocates the service to the determined slice.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: July 16, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Motoshi Tamura, Masayoshi Shimizu, Ashiq Khan, Shigeru Iwashina