Ntt Docomo, Inc.

Takuya Shimojou

Masayoshi Shimizu

Atsushi Minokuchi

Shigeru Iwashina

Malla Reddy Sama

Srisakul Thakolsri

Ashiq Khan

Motoshi Tamura

Wolfgang Kiess

Tomoki Shibahara

Irfan Ali

Joan Triay Marques

Akira Yamada

Yusuke Takano

Riccardo Guerzoni

Youhei Katayama

Sergio Beker

Daisuke Nojima

Kazuaki Obana

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

An object is to provide a slice management system capable of assigning slices to a plurality of business operators. In a parent SMF, a slice management tablecan manage resources of a slice managed by a child SMFor the like, and a communication unitcan notify the child SMFor the like of the resources. The child SMFor the like receives the resources and stores the resources in the slice management table. Therefore, the child SMFor the like can manage the resources of the slice managed by the child SMFor the like, and the child SMFcan independently enable the management of the resources.

Slice management system and slice management method

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

In a slice management device, a storage request accepting unitacquires correspondence information in which a service, a slice, and tracking areas are associated with each other. A presence-in-area identifying unitidentifies a presence-in-area status of a UE. An assignment unitassigns a slice corresponding to a service used by the UEand tracking areas represented by the correspondence information. In this case, the slice management deviceassigns a slice to a service in accordance with the presence-in-area status of the UE, and accordingly, a slice assigned to the service can be dynamically changed.

Slice assignment method

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.

Connection control method and connection control device

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

In a communication system () including a terminal (), a base station (), a processing server () that executes a process related to the terminal, and one or a plurality of serving gateways (), the processing server () includes: a determination unit () 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 () that performs control so that the unused bearer determined to be established by the determination unit () and the used bearer are established between a corresponding serving gateway and the terminal.

Communications system, processing server, and bearer establishment control method

In a communication system (), when there is no access destination corresponding to a service type to be used by a piece of UE () in one of cellular communication and non-cellular communication, a retrieval unit () of a DB server () 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 () 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.

Gateway selection method and communication system

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.

Slice changing method and slice changing device

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.

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.

Communication control method and communication system for changing a tracking area when a control plane and user plane are separated

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 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.

Growing community of inventors

Chiyoda-ku, Japan

Takuya Shimojou