Patents by Inventor Atsushi MINOKUCHI

Atsushi MINOKUCHI 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: 10952078
    Abstract: According to one embodiment, a method for associating network functions with a network slice instance of a mobile radio communication network is described comprising an Network Slice Management Function, NSMF, creating an identifier for a network slice instance, NSI, for Operations Administration and Management, OAM, wherein the mobile radio communication network comprises a core network and an OAM system, wherein the OAM system comprises at least the NSMF which has interfaces to network functions in the core network, wherein the network functions provide a communication service to a mobile terminal and wherein the core network further comprises a Network Repository Function, NRF, that maintains an association of network functions and network slice instances of the mobile radio communication network; and the NSMF or the NRF notifying one or more network functions about their association with the network slice instance.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: March 16, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Srisakul Thakolsri, Malla Reddy Sama, Atsushi Minokuchi
  • Patent number: 10856354
    Abstract: A radio communication method includes a step in which a MeNB (210) transmits a bearer setup instruction to establish a bearer including a first tunnel and a second tunnel based on a setup request, and a step in which a CN-UP (300) establishes the first tunnel and the second tunnel based on the bearer setup instruction. The CN-UP (300) sets the same identifiers to a TEID on the CN-UP (300) side of the first tunnel and a TEID on the CN-UP (300) side of the second tunnel.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: December 1, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Atsushi Minokuchi, Jari Mutikainen, Irfan Ali
  • 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
  • Publication number: 20200336979
    Abstract: In 5G cell (230) of 5G system (200), upon detecting that access to the 5G system (200) is barred, the 5G system (200) is congested, 5G core network (220) of the 5G system (200) does not support IMS-type communication service, or fallback to 4G system (300) is instructed, UE (100) selects 4G cell (330) of the 4G system (300) as a target cell for connection. The UE (100) transmits a connection request signal for the IMS-type communication service to the target cell for connection.
    Type: Application
    Filed: September 12, 2018
    Publication date: October 22, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kenichiro Aoyagi, Hiroshi Ishikawa, Atsushi Minokuchi, Shinya Takeda
  • 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
  • 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: 20200145833
    Abstract: According to one embodiment, a method for associating network functions with a network slice instance of a mobile radio communication network is described comprising an Network Slice Management Function, NSMF, creating an identifier for a network slice instance, NSI, for Operations Administration and Management, OAM, wherein the mobile radio communication network comprises a core network and an OAM system, wherein the OAM system comprises at least the NSMF which has interfaces to network functions in the core network, wherein the network functions provide a communication service to a mobile terminal and wherein the core network further comprises a Network Repository Function, NRF, that maintains an association of network functions and network slice instances of the mobile radio communication network; and the NSMF or the NRF notifying one or more network functions about their association with the network slice instance.
    Type: Application
    Filed: May 4, 2018
    Publication date: May 7, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Srisakul Thakolsri, Malla Reddy Sama, Atsushi Minokuchi
  • 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: 20200053564
    Abstract: According to one embodiment, a method for establishing a connection of a mobile terminal to a mobile radio communication network is described comprising a first common control plane function of a mobile radio communication network receiving a connection request from a mobile terminal; the first common control plane function authenticating the mobile terminal including generating an authentication context of the mobile terminal; the first common control plane function forwarding the connection request and transmitting the authentication context of the mobile terminal to a second common control plane function of the mobile radio communication network and the second common control plane function connecting the mobile terminal to the mobile radio communication network.
    Type: Application
    Filed: September 27, 2017
    Publication date: February 13, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Srisakul Thakolsri, Malla Reddy Sama, Irfan Ali, Atsushi Minokuchi, Takuya Shimojo, Alf Zugenmaier
  • Publication number: 20200053814
    Abstract: A radio communication method includes a step in which a MeNB (210) transmits a bearer setup instruction to establish a bearer including a first tunnel and a second tunnel based on a setup request, and a step in which a CN-UP (300) establishes the first tunnel and the second tunnel based on the bearer setup instruction. The CN-UP (300) sets the same identifiers to a TEID on the CN-UP (300) side of the first tunnel and a TEID on the CN-UP (300) side of the second tunnel.
    Type: Application
    Filed: October 6, 2017
    Publication date: February 13, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Atsushi Minokuchi, Jari Mutikainen, Irfan Ali
  • 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
  • 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
  • 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
  • Publication number: 20190199826
    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: Application
    Filed: July 6, 2017
    Publication date: June 27, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Masayoshi Shimizu, Atsushi Minokuchi, Takuya Shimojou
  • Publication number: 20190182733
    Abstract: A common C-Plane control node includes a change request acquiring unit that acquires a change request relating to changing of a communication path relating to a UE, a determination unit that determines whether or not the UE has set up the communication path in each of control nodes of a plurality of slices using information included in the change request acquired by the change request acquiring unit, and a communication processing unit that performs a process relating to changing of a communication path while forming a state in which the communication path before change and the communication path after change coexist for each of a plurality of communication paths in a case in which the determination unit determines that the UE has set up the communication path in each of the plurality of slices.
    Type: Application
    Filed: June 2, 2017
    Publication date: June 13, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Atsushi Minokuchi, Shigeru Iwashina, Malla Reddy Sama, Srisakul Thakolsri, Wolfgang Kiess, Riccardo Guerzoni
  • Patent number: 10278102
    Abstract: A correspondence information storage 32 acquires correspondence information in which an eNB 20, an SGW-C 60, and an SGW-U 70 are associated with each other in advance, and a connection controller 31 receives a handover request from the eNB 20 and identifies a target eNB 20 and a source eNB 20. A connection changer 33 identifies the SGW-C 60 and the SGW-U 70 associated with the target eNB 20 and identifies the SGW-C 60 and the SGW-U 70 associated with the source eNB 20, with reference to the correspondence information. The connection changer 33 determines whether or not the SGW-C 60 and the SGW-U 70 are to be changed on the basis of the identified result, and controls change requests for at least one of the SGW-C 60 and the SGW-U 70 on the basis of a result of the determination.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: April 30, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Masayoshi Shimizu, Tomoki Shibahara, Atsushi Minokuchi, Srisakul Thakolsri, Malla Reddy Sama, Wolfgang Kiess
  • Publication number: 20190059036
    Abstract: A slice management system is a system managing a slice that is a virtual network generated on a network infrastructure and includes a DNS storing slice information relating to a slice to which a UE can be connected for each area and determines whether or not the UE can, in a moving destination area that is a destination of movement of the UE between areas, be connected to a slice to which the UE was connected in a moving source area by referring to the DNS. In a case in which it is determined that the connection cannot be made, the slice management system generates the slice in the moving destination area such that the UE can be connected to the slice in the moving destination area.
    Type: Application
    Filed: March 29, 2017
    Publication date: February 21, 2019
    Applicant: 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: 20190053297
    Abstract: A connection control method is implemented by a communication system including a UE, two or more SGWs, and an MME for performing processing related to establishment and release of communication paths between the two or more SGWs and the UE. The connection control method includes a request reception in which the MME receives an establishment request of a communication path associated with the UE from one SGW, a path establishment starting processing related to establishment of communication paths between the UE and all SGWs, and an information updating in which the MME updates information related to an establishment status of the communication path stored in a storage unit on the basis of a result of establishing the communication path.
    Type: Application
    Filed: March 14, 2017
    Publication date: February 14, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Masayoshi SHIMIZU, Atsushi MINOKUCHI, Takuya SHIMOJOU