Ntt Docomo, Inc.

Atsushi Minokuchi

Malla Reddy Sama

Srisakul Thakolsri

Takuya Shimojou

Masayoshi Shimizu

Kenichiro Aoyagi

Hiroshi Ishikawa

Irfan Ali

Jari Mutikainen

Shinya Takeda

Riccardo Guerzoni

Alf Zugenmaier

Shigeru Iwashina

Ashiq Khan

Wolfgang Kiess

Tomoki Shibahara

Maoki Hikosaka

Ban Al-Bakri

Joan Triay Marques

Takuya Shimojo

Tooru Uchino

Kazuaki Obana

Bahador Bakhshi

Frederic Thepot

Al-Bakri Ban

Alf Zugenmeier

A session management apparatus including: a reception unit configured to receive, from a user plane apparatus, a time offset between a TSN time of a TSN time domain and a 5G time, and identification information of the TSN time domain; and a transmission unit configured to transmit, to a base station apparatus, a TSC assistance information determined based on the time offset and the identification information of the TSN time domain.

Session management apparatus, user plane apparatus, and access mobile management apparatus

A session management apparatus including: a reception unit configured to receive, from a user plane apparatus, time comparison information between a TSN time of a TSN time domain and a 5G time, and identification information of the TSN time domain; and a transmission unit configured to transmit, to a base station apparatus, TSN assistance information determined based on the time comparison information and identification information of a TSN stream for each of one or more TSN streams that belong to the TSN time domain.

Methods and devices provide for enhancements to the Steering of Roaming (SoR) provisioning during the registration procedure by introducing a new parameter generated by a user data management network function of the home network which indicates to roaming networks whether to request updated SoR information based on a registration type received in a registration request from a mobile terminal.

Communication system and method for operating a communication system

A network node includes a receiving unit configured to receive, from a management node, information for improving security of communication between network nodes, and a control unit configured to receive a request transmitted from a first network node arranged in a first PLMN (Public Land Mobile Network) based on the information for improving security, and transmit the request to a second network node arranged in a second PLMN.

Network node

An access control apparatus including: a reception unit; and a control unit configured to store, in a buffer, data transmitted from a terminal from when the reception unit receives a first message indicating that an application server is to be switched until when the reception unit receives a second message indicating move completion of an application context.

Access control apparatus and user plane apparatus

A network node includes a receiver configured to receive, from a user equipment, a message requesting an initial registration or a location registration from a user equipment; and a transmitter configured to transmit a message to the user equipment when the user equipment is disallowed to connect to any one of one or more network slices, the message allowing the initial registration or the location registration including information related to a connection restriction that causes the user equipment to transition into a state in which the user equipment is registered and the user equipment is not allowed to use a service.

Network node and user equipment that initiate a connection

A network node is a first network node in a VPLMN (Visited Public land mobile network), the network node including a receiving unit configured to receive information relating to network selection, from a second network node in an HPLMN (Home Public land mobile network); a transmitting unit configured to transmit the information relating to network selection, to a user equipment; and a control unit configured to transmit, to the second network node, a response indicating that the user equipment was unable to receive the information relating to network selection, when a response, with respect to the information relating to network selection transmitted to the user equipment, is not received from the user equipment.

Network node and reporting method

A user equipment includes a receiving unit configured to receive, from a network node in a VPLMN (Visited Public land mobile network), information indicating a PLMN to be prioritized and information indicating a trigger of PLMN selection; and a control unit configured to execute the PLMN selection, based on the information indicating the PLMN to be prioritized and the information indicating the trigger of the PLMN selection.

User equipment, network node, and communication system

In 5G cell () of 5G system (), upon detecting that access to the 5G system () is barred, the 5G system () is congested, 5G core network () of the 5G system () does not support IMS-type communication service, or fallback to 4G system () is instructed, UE () selects 4G cell () of the 4G system () as a target cell for connection. The UE () transmits a connection request signal for the IMS-type communication service to the target cell for connection.

User device

An NSSF () includes: a selection unit selecting a slice corresponding to a service related to a request from a terminal () 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 () 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.

Communication control method and communication system

A disclosed user device includes a receiver configured to receive emergency information from a network; and a control unit configured to change a process of detecting whether first emergency information is duplicated with second emergency information upon receiving, by the receiver, the second emergency information after the first emergency information, based on the first emergency information.

User equipment is capable of connecting to a first core network and a second core network through a base station apparatus. The user equipment includes a controller that connects to, upon selecting or visiting a cell of a base station apparatus that does not support the first core network while connecting to the first core network or visiting the first core network, the second core network through a connection in the cell.

User equipment, base station apparatus, and core network apparatus

According to one embodiment, a method for establishing a connection of a mobile terminal to a mobile radio communication network is described comprising a radio access network of a mobile radio communication network receiving a connection request from a mobile terminal, the radio access network establishing a control plane communication having as a first endpoint the radio access network, the radio access network forwarding the mobile terminal's connection request to a first common control plane function via the control plane communication, the radio access network receiving a message indicating that the second endpoint of the control plane communication should be set to the second common control plane function and the radio access network setting the second endpoint of the control plane communication to the second common control plane function.

Method for establishing a connection of a mobile terminal to a mobile radio communication network and radio access network component

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.

Method for establishing a connection of a mobile terminal to a mobile radio communication network and communication network device

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.

Growing community of inventors

Tokyo, Japan

Atsushi Minokuchi