Patents by Inventor Takihito YOSHIZAWA

Takihito YOSHIZAWA 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).

  • Method to select the right UDM instance and ensure the UDM instance security
    Patent number: 11496882
    Abstract: Methods for (i) finding/discovering the right UDM instances and (ii) ensuring the UDM instance security are provided. The method for (i), includes the steps of: (i-1) pre-provisioning of UDM instance discovery information/parameters to the UE/USIM, (i-2) sending the UDM instance discovery related parameters to a core network element, and (i-3) discovering the right UDM instance at the core network element based on the discovery parameters and related routing information either at the UDM consumer/NRF. The method for (ii) includes the steps of: (ii-1) Secured choice of parameter for UDM instance discovery (e.g. UDM instance identifier) to the core network element and (ii-2) the secured UDM instance identifier generation and management at the UDM to prevent attack on UDM instances. Also a method to identify the cleartext IMSI/SUPI is provided for the re-authentication scenario along with the relevant procedures.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: November 8, 2022
    Assignee: NEC CORPORATION
    Inventors: Sheeba Backia Mary Baskaran, Anand Raghawa Prasad, Sivakamy Lakshminarayanan, Sivabalan Arumugam, Hironori Ito, Takihito Yoshizawa
  • METHOD TO SELECT THE RIGHT UDM INSTANCE AND ENSURE THE UDM INSTANCE SECURITY
    Publication number: 20210051468
    Abstract: Methods for (i) finding/discovering the right UDM instances and (ii) ensuring the UDM instance security are provided. The method for (i), includes the steps of: (i-1) pre-provisioning of UDM instance discovery information/parameters to the UE/USIM, (i-2) sending the UDM instance discovery related parameters to a core network element, and (i-3) discovering the right UDM instance at the core network element based on the discovery parameters and related routing information either at the UDM consumer/NRF. The method for (ii) includes the steps of: (ii-1) Secured choice of parameter for UDM instance discovery (e.g. UDM instance identifier) to the core network element and (ii-2) the secured UDM instance identifier generation and management at the UDM to prevent attack on UDM instances. Also a method to identify the cleartext IMSI/SUPI is provided for the re-authentication scenario along with the relevant procedures.
    Type: Application
    Filed: February 15, 2019
    Publication date: February 18, 2021
    Inventors: Sheeba Backia Mary BASKARAN, Anand Raghawa PRASAD, Sivakamy LAKSHMINARAYANAN, Sivabalan ARUMUGAM, Hironori ITO, Takihito YOSHIZAWA