Ntt Docomo, Inc.

Srisakul Thakolsri

Malla Reddy Sama

Masayoshi Shimizu

Kenichiro Aoyagi

Atsushi Minokuchi

Takuya Shimojou

Ashiq Khan

Wolfgang Kiess

Shigeru Iwashina

Alf Zugenmaier

Eckehard Steinbach

Wolfgang Kellerer

Riccardo Guerzoni

Tomoki Shibahara

Joan Triay Marques

Takuya Shimojo

Hiroshi Ishikawa

Keisuke Suzuki

Motoshi Tamura

Masaki Nishimura

Ali El Essaili

Irfan Ali

Jari Mutikainen

Keisuke Sasada

Ban Al-Bakri

Sergio Beker

Reika Higa

Daisuke Fujishima

Kazuaki Obana

Dirk Staehle

Frederic Thepot

Alf Zugenmeier

Daniele Munaretto

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

According to one embodiment, a network function database of a mobile communication network is described comprising a memory configured to store, for a network function or service of the mobile communication network, an indication that the network function or service is configured to take over serving mobile terminals served by one of one or more other mobile communication networks, a receiver configured to receive, from another mobile radio communication network, a request for selecting a network function or service to take over serving a mobile terminal served by the other mobile communication network and a selector configured to select the network function or service for taking over serving the mobile terminal for which the memory stores the indication that the network function or service is configured to take over serving mobile terminals served by one of one or more other mobile communication networks if the one or more other mobile communication networks include the other mobile communication network serving the mobile terminal.

Network function database, mobile communication network component, method for selecting a network function and method for registering a network function

A radio communication system includes user equipment, a call control apparatus, and a plurality of communication apparatuses, wherein each communication apparatus belongs to one of a plurality of groups, wherein the user equipment transmits, to the call control apparatus, a first access request signal including a group specifying information for specifying one group and a communication destination identifier, wherein the call control apparatus transmits, to the communication apparatus belonging to the one group specified by the group specifying information, a second access request signal including the communication destination identifier, and wherein the communication apparatus establishes a communication path between a communication destination indicated by the communication destination identifier included in the second access request signal and the user equipment.

Radio communication system and communication method

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

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

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

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 systemforming a core network of the mobile communication and to cause a UEperforming the non-cellular communication to access a sliceproviding the service comprises: an acquisition step of acquiring from the UE, terminal identification information identifying the UE; and an access step of referring to correspondence information correlating the UEand the slice, and causing the UEto access the slicecorrelated with the UEidentified by the terminal identification information acquired in the acquisition step.

Network access method and communication system

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 unitthat receives a request for a connection with a slice of a control target of an AMFfrom a UEused by a user and a selection information transmitting unitthat controls, in response to the reception of the request, the connection of the UEwith the slice, acquires selection information for selecting a slice of a control target of another AMFdifferent from the AMF, and transmits the selection information to the terminal.

Information notification method and mobile communication system

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.

Communication control device and communication control method

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.

Method for associating network functions with a network slice instance of a mobile radio communication network

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). Then, when it is determined that the idle time for one bearer, for example, bearer, has reached the idle timer threshold value (Step), a PGWrequests an MME to release bearervia an SGW(Stepsand), and the MME performs a process of releasing bearerin response to the request (Stepand the like).

A slice management system () 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 () are aligned in order of priority levels and, in a case in which a connection request for a slice from the UE () is acquired, determines a slice to which UE () is to be connected on the basis of the priority list stored in the memory.

Slice management system and slice management method

In a communications system (A), a communication service which is utilized by UE () is specified from among a first communication service and a second communication service, an address of a SGW () 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 () that transmits and receives data for utilizing the communication service are correlated with each other, and a SGW () other than a first communication control device is retrieved when the specified communication service is the second communication service.

Communication control device selection method and communications system

A restriction control apparatus configured to perform restriction control of communication of a user apparatus in a mobile communication system includes an information obtaining unit configured to obtain, from a user information management apparatus in the mobile communication system, group identification information indicating a group to which the user apparatus belongs, and a restriction determination unit configured, when receiving a communication request from the user apparatus, to determine whether the group to which the user apparatus belongs is a control target or not based on the group identification information and group identification information of a control target determined by the restriction control apparatus.

Growing community of inventors

Munich, Germany

Srisakul Thakolsri