WO2019035287A1 - Communication control method and communication system - Google Patents

Communication control method and communication system Download PDF

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Publication number
WO2019035287A1
WO2019035287A1 PCT/JP2018/025728 JP2018025728W WO2019035287A1 WO 2019035287 A1 WO2019035287 A1 WO 2019035287A1 JP 2018025728 W JP2018025728 W JP 2018025728W WO 2019035287 A1 WO2019035287 A1 WO 2019035287A1
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Prior art keywords
access
communication control
access type
amf
network
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PCT/JP2018/025728
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French (fr)
Japanese (ja)
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拓也 下城
スリサクル タコルスリ
マラ レディ サマ
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株式会社Nttドコモ
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Publication of WO2019035287A1 publication Critical patent/WO2019035287A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/22Processing or transfer of terminal data, e.g. status or physical capabilities
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/14Backbone network devices

Definitions

  • the present invention relates to a communication control method and a communication system, and more particularly, to a communication control node in a communication system in which a network slice (hereinafter abbreviated as "slice") which is a virtual network is logically generated on a network infrastructure.
  • the present invention relates to a communication control method implemented by the present invention and the communication system.
  • a network system using a conventional virtualization technology virtually separates hardware resources using the virtualization technology disclosed in Non-Patent Document 1, and is a virtual network logically generated on a network infrastructure. Generate a slice. Then, by assigning a service to the slice, it is possible to provide a service using a network of independent slices. As a result, when a slice is allocated to each of the services having various requirements, it becomes easy to satisfy the requirements of each service, and it is possible to reduce the signaling processing and the like.
  • a slice selection device NSSF Network Slice Selection Function
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • the present invention aims to determine appropriate access processing based on the access type.
  • a communication control method is a communication control method executed by a communication control node that performs communication control in a communication system in which a slice that is a virtual network is logically generated on a network infrastructure. And acquiring an access type indicating an access method to a network by a terminal, and determining an access process to slice components constituting the slice based on the acquired access type.
  • the communication control node acquires an access type indicating an access method to the network by the terminal, and determines access processing to the slice component based on the acquired access type. This allows the appropriate access processing to be determined based on the actual access type in situations where different access types may be used.
  • the above-mentioned "communication control node” includes, for example, AMF (Access and Mobility Management Function), SMF (Session Management Function), NRF (Network Repository Function) which is a dedicated node for determining access processing, and the like.
  • the “slice component” includes, for example, AMF, SMF, UPF (User Plane Function), AUSF (Authentication Server Function), PCF (Policy Control Function) and the like.
  • the “access processing” to be determined includes, for example, selection of slice components according to the access type, and also includes inquiring of the access type to the terminal when there is no slice component according to the access type .
  • the "access type” is information indicating which access method the terminal has accessed.
  • appropriate access processing can be determined based on the access type.
  • the first embodiment is an example in which the present invention is applied to a network registration process by a terminal (User Equipment, hereinafter referred to as “UE”)
  • the second embodiment is a PDU (Protocol Data Unit) based on a request from the UE. It is an example which applied the present invention to session establishment processing.
  • UE User Equipment
  • PDU Protocol Data Unit
  • the communication system 1a includes a terminal (UE) 10, a plurality of radio access networks (hereinafter referred to as "RAN") 20, an initial AMF 30A, and a target.
  • a plurality of RANs 20 are wireless networks based on various communication methods such as mobile communication networks according to 3GPP standards including eNodeBs corresponding to base stations, wireless networks not conforming to 3GPP standards (for example, Wi-Fi etc.) Is included.
  • 3GPP standards including eNodeBs corresponding to base stations, wireless networks not conforming to 3GPP standards (for example, Wi-Fi etc.) Is included.
  • the initial AMF 30A and the target AMF 30B are nodes provided with functions (AMF functions) for performing access management, mobility management, etc. of the UE 10 located in the network, and among the above, the initial AMF 30A is the default AMF for the UE 10,
  • the target AMF 30B is an AMF selected as an AMF to be accessed by the process according to the present invention described later.
  • the NRF 40 is a dedicated node having a function of determining access processing according to the present invention in the communication system 1 a
  • the UDM 50 is a node having a function of managing user (subscriber) information of the UE 10.
  • the NSSF 60 is a node having a function of selecting a slice
  • the AUSF 70 is a node having a function of executing an authentication process.
  • the SMF 80 is a node having a function of managing a U-Plane session
  • the UPF 90 is a node having a function of processing U-Plane traffic.
  • a slice which is a virtual network logically generated on the network infrastructure, is configured to include the target AMF 30B, SMF 80 and UPF 90, and a set of nodes and circuits that constitute the slice is called NSI (Network Slice Instance). .
  • NSI Network Slice Instance
  • FIG. 2 shows the message transmission from UE to the message transmission to UE.
  • the process of FIG. 2 does not include the process by the SMF 80 and the UPF 90 because it is a process before the slice is created.
  • an Initial UE message is transmitted from the UE to the initial AMF via the RAN (step 1 in FIG. 2), and then predetermined option processing is performed (step 2). Then, the initial AMF requests subscriber information related to the user (subscriber) of the UE from the UDM (step 3), and receives a response from the UDM (step 4). The initial AMF also sends a slice selection request to the NSSF (step 5) and receives its response from the NSSF (step 6).
  • the initial AMF transmits, to the NRF, an Nnrf_NF Discovery Request including an access type indicating an access method from the UE in order to query the NRF for a target AMF to be accessed by the UE. 7).
  • the initial AMF recognizes the access type from the UE in the above step 1 depending on which access method RAN the UE has accessed from. By automatically recognizing the access type in this way, it becomes unnecessary to send an explicit notification (notification on the access type) from the UE.
  • the initial AMF may recognize the access type by an explicit notification from the UE (notification regarding the access type).
  • the NRF determines an appropriate target AMF according to the access type included in the Nnrf_NF Discovery Request, and responds the determined target AMF to the initial AMF by the Nnrf_NF Discovery Response (step 8).
  • the NRF may request the initial AMF to query the UE for another access type in the absence of an appropriate target AMF according to the access type.
  • the NRF may not only determine the target AMF to access, but also may request the UE to query another access type in the absence of an appropriate target AMF.
  • the initial AMF performs the following redirect processing to change the destination of the message from the UE to the target AMF.
  • a first method of directly transmitting Reroute message from the initial AMF to the target AMF shown in (A) of FIG. 2 and a second method of redirecting to the target AMF via the RAN shown in (B) of FIG. The method is illustrated.
  • the initial AMF directly transmits the Reroute message to the target AMF (step 9A), and then transmits and receives an N2 message between the target AMF and the RAN (steps 10A and 11A), and the UE Redirect the message destination from to the target AMF.
  • the target AMF recognizes the access type from the UE depending on which access method RAN has sent the N2 message in step 11A. By thus automatically recognizing the access type, it becomes unnecessary to send an explicit notification on the access type from, for example, the initial AMF.
  • the target AMF may recognize the access type by explicit notification of the access type included in the N2 message.
  • the initial AMF transmits the Reroute NAS message including the information of the target AMF to the RAN (step 9B), and transmits the Initial UE message from the UE again from the RAN to the target AMF.
  • Step 10B redirect the destination of the message from the UE to the target AMF.
  • the target AMF recognizes the access type from the UE depending on which access method RAN has transmitted the Initial UE message in step 10B. Also, the target AMF may recognize the access type by explicit notification of the access type included in the Initial UE message.
  • the target AMF then selects the appropriate AUSF based on the recognized access type (step 12). Thereafter, predetermined authentication processing is performed among the selected AUSF, UE and UDM (step 13).
  • Step 14 Registration Accept is sent from the initial AMF to the UE via RAN (Step 15), and Registration Complete responds to the initial AMF via the RAN from RAN Step 16).
  • Step 15 Registration Accept is sent from the initial AMF to the UE via RAN (Step 15)
  • Registration Complete responds to the initial AMF via the RAN from RAN Step 16).
  • the initial AMF selects an appropriate target AMF (target AMF to be accessed by the UE) according to the access type. it can. That is, appropriate access processing can be determined. Similarly, the target AMF can select the appropriate AUSF based on the recognized access type.
  • a disadvantage considered when selecting an access destination node based on the service requirements that is, a node unsuitable for the access type (for example, a node with a capacity excess) is selected Can be prevented.
  • the present invention is applied to PDU session establishment processing based on a request from a UE.
  • the PDU session establishment process is performed in the communication system 1b according to the second embodiment shown in FIG. The components associated with are shown.
  • the communication system 1 b includes the UE 10, the plurality of RANs 20, the AMF 30, the NRF 40, the UDM 50, the plurality of SMFs 80, the plurality of UPFs 90, and the plurality of PCFs (Policy Control Function) 100. It comprises.
  • the AMF 30 here corresponds to the target AMF 30B in the first embodiment, and the details thereof will be described later.
  • the AMF 30 selects an appropriate SMF 80 according to the access type from a plurality of SMFs 80.
  • the selected SMF 80 selects an appropriate UPF 90 according to the access type from the plurality of UPFs 90, and selects an appropriate PCF 100 according to the access type from the plurality of PCFs 100.
  • FIGS. 4 to 6 An example in which the present invention is applied to PDU session establishment processing based on a request from a UE will be described below using FIGS. 4 to 6.
  • a PDU Session Establishment Request is transmitted from the UE to the AMF via the RAN (step 1 in FIG. 4).
  • the AMF recognizes the access type from the UE depending on which access method RAN has transmitted a PDU Session Establishment Request. By thus automatically recognizing the access type, it becomes unnecessary to send an explicit notification on the access type from the UE. Note that the AMF may recognize the access type by explicit notification of the access type included in the PDU Session Establishment Request.
  • the AMF selects an appropriate SMF related to the PDU Session as follows (step 2). For example, as shown in FIG. 5, the AMF selects an appropriate SMF by querying the NRF. That is, when the AMF transmits an Nnrf_NF Discovery_request including the access type (indicated as “Access Network Type” in FIG. 5) recognized as described above to the NRF (Step 1 in FIG. 5), the NRF receives the received Nnrf_NF. As a process responding to Discovery_request, an appropriate SMF according to the access type is selected (Step 2 in FIG. 5), and Nnrf_NF Discovery_response including the selected SMF information is returned to the AMF (Step 3 in FIG. 5). This allows the AMF to select an appropriate SMF according to the access type. In addition, in step 2 of FIG. 4, the AMF may select an SMF corresponding to an access type by the AMF itself, in addition to inquiring to the NRF.
  • Nnrf_NF Discovery_request
  • the AMF requests the PDU session establishment by sending Namf_PDUSession_CreateSMContext to the selected SMF (step 3), and the SMF obtains subscriber information by sending Nudm_SubscriberData_Get to the UDM (step 4), and A predetermined user authentication process (PDU Session authentication / authorization) prior to the establishment of a PDU session is executed (step 5).
  • the SMF recognizes the access type, for example, from the access type information included in the message received in step 3 or from the access type information included in a message (not shown) from an AMF or the like. Then, the SMF selects an appropriate PCF according to the access type (step 6a). In the process of step 6a, as in step 2 described above, the PCF may be selected by inquiring to the NRF, or the PCF may be selected by the SMF itself. Thereafter, predetermined processing related to policy control is performed between the SMF and the selected PCF (steps 6 b and 6 c).
  • the SMF selects an appropriate UPF according to the access type (step 7). For example, as shown in FIG. 6, the SMF selects an appropriate UPF by querying the NRF. That is, when the SMF transmits Nnrf_NF Discovery_request including the previously recognized access type (denoted as “Access Network Type” in FIG. 6) to the NRF (Step 1 in FIG. 6), the NRF responds to the received Nnrf_NF Discovery_request. Then, an appropriate UPF according to the access type is selected (step 2 in FIG. 6), and an Nnrf_NF Discovery_response including the selected UPF information is returned to the SMF (step 3 in FIG. 6). This allows the SMF to select an appropriate UPF according to the access type. In addition, in step 7 of FIG. 4, the SMF may select the UPF according to the access type by the SMF itself other than inquiring to the NRF.
  • predetermined processing related to policy control is performed between the SMF and the PCF (steps 8a and 8b), and the SMF transmits an N4 Session Establishment / Modification Request to the selected UPF (step 9a), A response (N4 Session Establishment / Modification Response) is received from the UPF (step 9b).
  • the SMF transmits an Nsmf_PDUSession_CreateSMContext Response to the AMF as a response to the PDU Session establishment request in the step 3 (step 10).
  • the AMF makes a session establishment request by transmitting an N2 PDU Session Request to the RAN (step 11), and accordingly, a PDU session is established between the RAN and the UE (step 12), and further, from the RAN
  • the process according to the session establishment request is completed by responding N2 PDU Session Request Ack to AMF (step 13). Thereafter, predetermined processing including the first uplink data transmission from the UE is performed (step 14).
  • the AMF can select an appropriate SMF according to the access type, and the SMF accesses Appropriate UPF and PCF can be selected according to the type. In this way, appropriate access processing can be determined.
  • a disadvantage considered when selecting an access destination node based on the service requirements that is, a node unsuitable for the access type (for example, a node with a capacity excess) is selected Can be prevented.
  • each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.
  • the communication control nodes nodes such as the NRF 40, the AMF 30, and the SMF 80
  • the terminal (UE) 10 may function as a computer that performs the above-described processing.
  • the UE 10 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like.
  • the term “device” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the terminal 10 may be configured to include one or more of the devices illustrated in the drawing, or may be configured without including some devices.
  • Each function in the terminal 10 performs a calculation by causing the processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and performs communication by the communication device 1004, data in the memory 1002 and the storage 1003. This is realized by controlling the reading and / or writing of
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • each functional unit of the terminal 10 may be realized including the processor 1001.
  • the processor 1001 reads a program (program code), a software module and data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
  • a program a program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
  • each functional unit of the terminal 10 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, or may be realized similarly for other functional blocks.
  • the various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device) or the like.
  • the memory 1002 may store a program (program code), a software module, etc. that can be executed to implement the method according to an embodiment of the present invention.
  • the storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used.
  • the storage 1003 may be called an auxiliary storage device.
  • the above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
  • a network device for example, a network controller, a network card, a communication module, or the like.
  • each functional unit of the above-described terminal 10 may be realized including the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
  • the terminal 10 includes hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). Some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • the input / output information may be stored in a specific place (for example, a memory), or may be managed by a management table. Information to be input or output may be overwritten, updated or added. The output information may be deleted. The input information or the like may be transmitted to another device.
  • the determination may be performed by a value (0 or 1) represented by one bit, may be performed by a boolean value (Boolean: true or false), or may be compared with a numerical value (for example, a predetermined value). Comparison with the value).
  • notification of predetermined information is not limited to what is explicitly performed, but is performed by implicit (for example, not notifying of the predetermined information) It is also good.
  • Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.
  • software, instructions, etc. may be sent and received via a transmission medium.
  • software may use a wireline technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a website, server or other using wireless technology such as infrared, radio and microwave When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.
  • wireline technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a website, server or other using wireless technology such as infrared, radio and microwave
  • data, instructions, commands, information, signals, bits, symbols, chips etc may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of
  • information, parameters, and the like described in the present specification may be represented by absolute values, may be represented by relative values from predetermined values, or may be represented by corresponding other information. .
  • Mobile communication terminals may be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, by those skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.
  • determining may encompass a wide variety of operations.
  • “Judgment”, “decision” are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc.
  • “determination” and “determination” are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to that element does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken there, or that in any way the first element must precede the second element.
  • 1a, 1b ... communication system 10 ... terminal (UE), 20 ... RAN, 30 ... AMF, 30A ... initial AMF, 30B ... target AMF, 40 ... NRF, 50 ... UDM, 60 ... NSSF, 70 ... AUSF, 80 ... SMF, 90: UPF, 100: PCF, 1001: processor, 1002: memory, 1003: storage, 1004: communication device, 1005: input device, 1006: output device, 1007: bus.

Abstract

This communication control method is executed by a communication control node (for example, NRF (Network Repository Function)) that performs communication control in a communication system in which a slice, which is a virtual network, is logically generated on a network infrastructure. The communication control method comprises: a step (1) for acquiring an access type indicating a scheme for accessing a network by a terminal; and a step (2) for determining, on the basis of the acquired access type, a process for accessing a slice constituent element that constitutes the slice.

Description

通信制御方法および通信システムCommunication control method and communication system
 本発明は、通信制御方法および通信システムに係り、より詳しくは、ネットワークインフラ上に仮想ネットワークであるネットワークスライス(以下「スライス」と略記する)が論理的に生成される通信システムにて通信制御ノードによって実行される通信制御方法、および、当該通信システムに関する。 The present invention relates to a communication control method and a communication system, and more particularly, to a communication control node in a communication system in which a network slice (hereinafter abbreviated as "slice") which is a virtual network is logically generated on a network infrastructure. The present invention relates to a communication control method implemented by the present invention and the communication system.
 従来の仮想化技術を用いたネットワークシステムは、非特許文献1に開示された仮想化技術を用いて、ハードウェア資源を仮想的に切り分けて、ネットワークインフラ上に論理的に生成される仮想ネットワークであるスライスを生成する。そして、当該スライスへサービスを割当てることにより、それぞれ独立したスライスのネットワークを用いてサービスを提供することができる。これにより、多様な要求条件を持つサービス各々にスライスを割り当てた場合、サービス個々の要求条件を満たすことを容易にし、そのシグナリング処理などを軽減させることが可能となる。 A network system using a conventional virtualization technology virtually separates hardware resources using the virtualization technology disclosed in Non-Patent Document 1, and is a virtual network logically generated on a network infrastructure. Generate a slice. Then, by assigning a service to the slice, it is possible to provide a service using a network of independent slices. As a result, when a slice is allocated to each of the services having various requirements, it becomes easy to satisfy the requirements of each service, and it is possible to reduce the signaling processing and the like.
 また、既存の標準化アーキテクチャにおいては,スライス選択装置であるNSSF (Network Slice Selection Function)が、サービスの要求条件に基づいて、上述したスライスを構成するスライス構成要素(例えば、AMF(Access and Mobility Management Function)、SMF(Session Management Function)等)を選択する。 Also, in the existing standardized architecture, a slice selection device NSSF (Network Slice Selection Function) is a slice component (for example, AMF (Access and Mobility Management Function) that configures the above-mentioned slice based on the service requirement. ), SMF (Session Management Function), etc.).
 近年の5G(第5世代ネットワーク)時代においては、セルラ方式のみならず、Wi-Fi(登録商標)等の様々なアクセス方式(アクセスタイプ)が用いられている。ところが、このような様々なアクセスタイプに応じて、上述したスライス構成要素の選択を含んだアクセス処理の決定を行うことについては、未だあまり検討されていなかった。 In the recent 5G (fifth generation network) era, not only the cellular system but also various access systems (access types) such as Wi-Fi (registered trademark) are used. However, according to such various access types, the decision of the access process including the selection of the slice component described above has not been considered very much yet.
 そこで、本発明は、アクセスタイプに基づいて適切なアクセス処理を決定することを目的とする。 Therefore, the present invention aims to determine appropriate access processing based on the access type.
 本発明の一実施形態に係る通信制御方法は、ネットワークインフラ上に仮想ネットワークであるスライスが論理的に生成される通信システムにて、通信制御を行う通信制御ノードによって実行される通信制御方法であって、端末によるネットワークへのアクセス方式を示すアクセスタイプを取得するステップと、取得されたアクセスタイプに基づいて、前記スライスを構成するスライス構成要素へのアクセス処理を決定するステップと、を備える。 A communication control method according to an embodiment of the present invention is a communication control method executed by a communication control node that performs communication control in a communication system in which a slice that is a virtual network is logically generated on a network infrastructure. And acquiring an access type indicating an access method to a network by a terminal, and determining an access process to slice components constituting the slice based on the acquired access type.
 上記通信制御方法によれば、通信制御ノードは、端末によるネットワークへのアクセス方式を示すアクセスタイプを取得し、取得されたアクセスタイプに基づいてスライス構成要素へのアクセス処理を決定する。これにより、様々なアクセスタイプが使用されうる状況で、実際のアクセスタイプに基づいて、適切なアクセス処理を決定することができる。 According to the above communication control method, the communication control node acquires an access type indicating an access method to the network by the terminal, and determines access processing to the slice component based on the acquired access type. This allows the appropriate access processing to be determined based on the actual access type in situations where different access types may be used.
 上記の「通信制御ノード」としては、例えば、AMF(Access and Mobility Management Function)、SMF(Session Management Function)、アクセス処理を決定する専用のノードであるNRF(Network Repository Function)などを含み、上記の「スライス構成要素」としては、例えば、AMF、SMF、UPF(User Plane Function)、AUSF(Authentication Server Function)、PCF(Policy Control Function)などを含む。また、決定される「アクセス処理」は、例えば、アクセスタイプに応じたスライス構成要素の選択を含み、また、アクセスタイプに応じたスライス構成要素が無い場合に端末にアクセスタイプを問い合わせること等も含む。また、「アクセスタイプ」とは、端末がどのアクセス方式によりアクセスしてきたかを示す情報である。 The above-mentioned "communication control node" includes, for example, AMF (Access and Mobility Management Function), SMF (Session Management Function), NRF (Network Repository Function) which is a dedicated node for determining access processing, and the like. The “slice component” includes, for example, AMF, SMF, UPF (User Plane Function), AUSF (Authentication Server Function), PCF (Policy Control Function) and the like. Also, the “access processing” to be determined includes, for example, selection of slice components according to the access type, and also includes inquiring of the access type to the terminal when there is no slice component according to the access type . The "access type" is information indicating which access method the terminal has accessed.
 本発明によれば、アクセスタイプに基づいて適切なアクセス処理を決定することができる。 According to the present invention, appropriate access processing can be determined based on the access type.
第1実施形態に係る通信システムの構成図である。It is a block diagram of the communication system concerning a 1st embodiment. 第1実施形態に係る処理のフロー図である。It is a flow figure of processing concerning a 1st embodiment. 第2実施形態に係る通信システムの構成図である。It is a block diagram of the communication system concerning 2nd Embodiment. 第2実施形態に係る処理のフロー図である。It is a flowchart of the process which concerns on 2nd Embodiment. 図4のステップ2の詳細を示すフロー図である。It is a flowchart which shows the detail of step 2 of FIG. 図4のステップ7の詳細を示すフロー図である。It is a flowchart which shows the detail of step 7 of FIG. NRF等の通信制御ノードのハードウェア構成例を示す図である。It is a figure which shows the hardware structural example of communication control nodes, such as NRF.
 以下、図面を参照しながら、本発明の各種の実施形態について説明する。第1実施形態は、端末(User Equipment、以下「UE」と称する)によるネットワーク登録処理に本発明を適用した例であり、第2実施形態は、UEからの要求に基づくPDU(Protocol Data Unit)セッション確立処理に本発明を適用した例である。なお、図面の説明においては同一要素には同一符号を付し、重複する説明を省略する。 Hereinafter, various embodiments of the present invention will be described with reference to the drawings. The first embodiment is an example in which the present invention is applied to a network registration process by a terminal (User Equipment, hereinafter referred to as “UE”), and the second embodiment is a PDU (Protocol Data Unit) based on a request from the UE. It is an example which applied the present invention to session establishment processing. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description.
 [第1実施形態]
 図1に示すように第1実施形態に係る通信システム1aは、端末(UE)10と、複数の無線アクセス網(Radio Access Network(以下「RAN」と称する))20と、イニシャルAMF30Aと、ターゲットAMF30Bと、NRF40と、UDM(Unified Data Management)50と、NSSF60と、AUSF(Authentication Server Function)70と、複数のSMF80と、複数のUPF(User Plane Function)90と、を含んで構成される。
First Embodiment
As shown in FIG. 1, the communication system 1a according to the first embodiment includes a terminal (UE) 10, a plurality of radio access networks (hereinafter referred to as "RAN") 20, an initial AMF 30A, and a target. The AMF 30 B, the NRF 40, the UDM (Unified Data Management) 50, the NSSF 60, the AUSF (Authentication Server Function) 70, a plurality of SMFs 80, and a plurality of UPFs (User Plane Function) 90.
 このうち、複数のRAN20には、基地局に相当するeNodeBを含んだ3GPP規格に係る移動通信ネットワーク、3GPP規格に準拠しない無線ネットワーク(例えばWi-Fi等)など、さまざまな通信方式に基づく無線ネットワークが含まれる。 Among these, a plurality of RANs 20 are wireless networks based on various communication methods such as mobile communication networks according to 3GPP standards including eNodeBs corresponding to base stations, wireless networks not conforming to 3GPP standards (for example, Wi-Fi etc.) Is included.
 イニシャルAMF30AおよびターゲットAMF30Bは、ネットワークに在圏するUE10のアクセス管理、モビリティ管理等を行う機能(AMFの機能)を備えたノードであり、上記のうちイニシャルAMF30Aは、UE10にとってデフォルトのAMFであり、ターゲットAMF30Bは、後述する本発明に係る処理によって、アクセスすべきAMFとして選択されるAMFである。 The initial AMF 30A and the target AMF 30B are nodes provided with functions (AMF functions) for performing access management, mobility management, etc. of the UE 10 located in the network, and among the above, the initial AMF 30A is the default AMF for the UE 10, The target AMF 30B is an AMF selected as an AMF to be accessed by the process according to the present invention described later.
 NRF40は、通信システム1aにおいて、本発明に係るアクセス処理を決定する機能を備えた専用のノードであり、UDM50は、UE10のユーザ(加入者)情報を管理する機能を備えたノードである。NSSF60は、スライスを選択する機能を備えたノードであり、AUSF70は、認証処理を実行する機能を備えたノードである。 The NRF 40 is a dedicated node having a function of determining access processing according to the present invention in the communication system 1 a, and the UDM 50 is a node having a function of managing user (subscriber) information of the UE 10. The NSSF 60 is a node having a function of selecting a slice, and the AUSF 70 is a node having a function of executing an authentication process.
 SMF80は、U-Planeセッションを管理する機能を備えたノードであり、UPF90は、U-Planeトラヒックを処理する機能を備えたノードである。 The SMF 80 is a node having a function of managing a U-Plane session, and the UPF 90 is a node having a function of processing U-Plane traffic.
 ネットワークインフラ上に論理的に生成される仮想ネットワークであるスライスは、上記ターゲットAMF30B、SMF80およびUPF90を含んで構成され、スライスを構成するノード・回線の集合はNSI(Network Slice Instance)と称される。1つのAMFは複数のスライスで共有されうる。 A slice, which is a virtual network logically generated on the network infrastructure, is configured to include the target AMF 30B, SMF 80 and UPF 90, and a set of nodes and circuits that constitute the slice is called NSI (Network Slice Instance). . One AMF can be shared by multiple slices.
 以下、図2を用いて、UEによるネットワーク登録処理に本発明を適用した例を説明する。なお、図2には、「UE」の表記が省略されているが、図2に示す「RAN」の動作は、UEからのメッセージ送信およびUEへのメッセージ送信を示している。また、図2の処理は、スライスが作成される前段階の処理であるため、SMF80およびUPF90による処理を含んでいない。 Hereinafter, an example in which the present invention is applied to the network registration process by the UE will be described using FIG. In addition, although the description of "UE" is abbreviate | omitted in FIG. 2, operation | movement of "RAN" shown in FIG. 2 has shown the message transmission from UE to the message transmission to UE. Further, the process of FIG. 2 does not include the process by the SMF 80 and the UPF 90 because it is a process before the slice is created.
 まず、UEからRAN経由でInitial UE messageが、イニシャルAMFへ送信され(図2のステップ1)、その後、所定のオプション処理が実行される(ステップ2)。そして、イニシャルAMFは、UEのユーザ(加入者)に係る加入者情報をUDMに要求し(ステップ3)、その応答をUDMから受信する(ステップ4)。また、イニシャルAMFは、スライス選択要求をNSSFに送信し(ステップ5)、その応答をNSSFから受信する(ステップ6)。 First, an Initial UE message is transmitted from the UE to the initial AMF via the RAN (step 1 in FIG. 2), and then predetermined option processing is performed (step 2). Then, the initial AMF requests subscriber information related to the user (subscriber) of the UE from the UDM (step 3), and receives a response from the UDM (step 4). The initial AMF also sends a slice selection request to the NSSF (step 5) and receives its response from the NSSF (step 6).
 次に、イニシャルAMFは、本発明に係る処理として、UEがアクセスすべきターゲットAMFをNRFに問い合わせるために、UEからのアクセス方式を示すアクセスタイプを含んだNnrf_NF Discovery RequestをNRFへ送信する(ステップ7)。なお、ステップ7に先立ち、イニシャルAMFは、上記ステップ1で、UEがどのアクセス方式のRANからアクセスしてきたかによって、UEからのアクセスタイプを認識する。このようにアクセスタイプを自動認識することで、UEから明示的な通知(アクセスタイプに関する通知)を送付することが不要となる。なお、イニシャルAMFは、UEからの明示的な通知(アクセスタイプに関する通知)によってアクセスタイプを認識してもよい。 Next, as processing according to the present invention, the initial AMF transmits, to the NRF, an Nnrf_NF Discovery Request including an access type indicating an access method from the UE in order to query the NRF for a target AMF to be accessed by the UE. 7). Note that, prior to step 7, the initial AMF recognizes the access type from the UE in the above step 1 depending on which access method RAN the UE has accessed from. By automatically recognizing the access type in this way, it becomes unnecessary to send an explicit notification (notification on the access type) from the UE. Note that the initial AMF may recognize the access type by an explicit notification from the UE (notification regarding the access type).
 NRFは、Nnrf_NF Discovery Requestに含まれたアクセスタイプに応じた、適切なターゲットAMFを決定し、決定したターゲットAMFをNnrf_NF Discovery ResponseによってイニシャルAMFに応答する(ステップ8)。ここで、NRFは、アクセスタイプに応じた適切なターゲットAMFが無い場合には、別のアクセスタイプをUEに問い合わせるようイニシャルAMFに対し要求してもよい。このように、NRFは、アクセスすべきターゲットAMFを決定するだけでなく、適切なターゲットAMFが無い場合に別のアクセスタイプをUEに問い合わせるよう要求するといった処理を行ってもよい。NRFという専用のノードによって、アクセス先(例えばアクセスすべきターゲットAMF)を決定することで、決定処理の安定化、情報の一元管理などが可能となる。 The NRF determines an appropriate target AMF according to the access type included in the Nnrf_NF Discovery Request, and responds the determined target AMF to the initial AMF by the Nnrf_NF Discovery Response (step 8). Here, the NRF may request the initial AMF to query the UE for another access type in the absence of an appropriate target AMF according to the access type. In this way, the NRF may not only determine the target AMF to access, but also may request the UE to query another access type in the absence of an appropriate target AMF. By determining an access destination (for example, a target AMF to be accessed) by a dedicated node called NRF, it becomes possible to stabilize the determination processing and centrally manage information.
 その後、イニシャルAMFは、UEからのメッセージの宛先をターゲットAMFへ変更するために、以下のようなリダイレクト処理を行う。ここでは、図2に(A)で示したイニシャルAMFからターゲットAMFへReroute messageを直接送信する第1の方法と、図2に(B)で示したRAN経由でターゲットAMFへリダイレクトする第2の方法とが例示される。 Thereafter, the initial AMF performs the following redirect processing to change the destination of the message from the UE to the target AMF. Here, a first method of directly transmitting Reroute message from the initial AMF to the target AMF shown in (A) of FIG. 2 and a second method of redirecting to the target AMF via the RAN shown in (B) of FIG. The method is illustrated.
 上記第1の方法によれば、イニシャルAMFは、ターゲットAMFへReroute messageを直接送信し(ステップ9A)、その後、ターゲットAMFとRAN間でN2 messageを送受信することで(ステップ10A、11A)、UEからのメッセージの宛先をターゲットAMFへリダイレクトする。ターゲットAMFは、上記ステップ11AでN2 messageがどのアクセス方式のRANから送信されてきたかによって、UEからのアクセスタイプを認識する。このようにアクセスタイプを自動認識することで、アクセスタイプに関する明示的な通知を例えばイニシャルAMFから送付することが不要となる。なお、ターゲットAMFは、N2 messageに含まれた、アクセスタイプの明示的な通知によってアクセスタイプを認識してもよい。 According to the first method, the initial AMF directly transmits the Reroute message to the target AMF (step 9A), and then transmits and receives an N2 message between the target AMF and the RAN (steps 10A and 11A), and the UE Redirect the message destination from to the target AMF. The target AMF recognizes the access type from the UE depending on which access method RAN has sent the N2 message in step 11A. By thus automatically recognizing the access type, it becomes unnecessary to send an explicit notification on the access type from, for example, the initial AMF. The target AMF may recognize the access type by explicit notification of the access type included in the N2 message.
 上記第2の方法によれば、イニシャルAMFは、ターゲットAMFの情報を含んだReroute NAS messageをRANへ送信し(ステップ9B)、UEからのInitial UE messageを改めてRANからターゲットAMFへ送信することで(ステップ10B)、UEからのメッセージの宛先をターゲットAMFへリダイレクトする。ターゲットAMFは、上記ステップ10BでInitial UE messageがどのアクセス方式のRANから送信されてきたかによって、UEからのアクセスタイプを認識する。また、ターゲットAMFは、Initial UE messageに含まれた、アクセスタイプの明示的な通知によってアクセスタイプを認識してもよい。 According to the second method, the initial AMF transmits the Reroute NAS message including the information of the target AMF to the RAN (step 9B), and transmits the Initial UE message from the UE again from the RAN to the target AMF. (Step 10B) redirect the destination of the message from the UE to the target AMF. The target AMF recognizes the access type from the UE depending on which access method RAN has transmitted the Initial UE message in step 10B. Also, the target AMF may recognize the access type by explicit notification of the access type included in the Initial UE message.
 次に、ターゲットAMFは、認識したアクセスタイプに基づいて、適切なAUSFを選択する(ステップ12)。その後、選択されたAUSF、UEおよびUDM間で所定の認証処理が行われる(ステップ13)。 The target AMF then selects the appropriate AUSF based on the recognized access type (step 12). Thereafter, predetermined authentication processing is performed among the selected AUSF, UE and UDM (step 13).
 そして、ネットワーク登録に係るその他の処理が実行された後(ステップ14)、イニシャルAMFからRAN経由のUE宛てにRegistration Acceptが送信され(ステップ15)、UEからRAN経由でイニシャルAMFにRegistration Completeが応答される(ステップ16)。これにより、図2のネットワーク登録処理が完了する。 Then, after other processing related to network registration is executed (Step 14), Registration Accept is sent from the initial AMF to the UE via RAN (Step 15), and Registration Complete responds to the initial AMF via the RAN from RAN Step 16). Thus, the network registration process of FIG. 2 is completed.
 以上説明した第1実施形態によれば、UEによるネットワーク登録処理に本発明を適用することで、イニシャルAMFは、アクセスタイプに応じた、適切なターゲットAMF(UEがアクセスすべきターゲットAMF)を選択できる。即ち、適切なアクセス処理を決定することができる。同様に、ターゲットAMFは、認識したアクセスタイプに基づいて、適切なAUSFを選択できる。 According to the first embodiment described above, by applying the present invention to the network registration process by the UE, the initial AMF selects an appropriate target AMF (target AMF to be accessed by the UE) according to the access type. it can. That is, appropriate access processing can be determined. Similarly, the target AMF can select the appropriate AUSF based on the recognized access type.
 これに伴い、アクセスタイプを基礎とせず、例えばサービス要件に基づいてアクセス先ノードを選択する場合に考えられる不都合、即ち、アクセスタイプに対し適さないノード(例えば能力的に過剰なノード)が選択されてしまう不都合を防止することができる。 Along with this, based on the service requirements, for example, a disadvantage considered when selecting an access destination node based on the service requirements, that is, a node unsuitable for the access type (for example, a node with a capacity excess) is selected Can be prevented.
 [第2実施形態]
 次に、第2実施形態では、UEからの要求に基づくPDUセッション確立処理に本発明を適用した例を説明する。第2実施形態では、第1実施形態で述べたネットワーク登録処理が完了した後のPDUセッション確立処理を説明するため、図3に示す第2実施形態に係る通信システム1bには、PDUセッション確立処理に関連した構成要素が示されている。
Second Embodiment
Next, in the second embodiment, an example in which the present invention is applied to PDU session establishment processing based on a request from a UE will be described. In the second embodiment, in order to describe the PDU session establishment process after the network registration process described in the first embodiment is completed, the PDU session establishment process is performed in the communication system 1b according to the second embodiment shown in FIG. The components associated with are shown.
 図3に示すように通信システム1bは、UE10と、複数のRAN20と、AMF30と、NRF40と、UDM50と、複数のSMF80と、複数のUPF90と、複数のPCF(Policy Control Function)100と、を含んで構成される。 As shown in FIG. 3, the communication system 1 b includes the UE 10, the plurality of RANs 20, the AMF 30, the NRF 40, the UDM 50, the plurality of SMFs 80, the plurality of UPFs 90, and the plurality of PCFs (Policy Control Function) 100. It comprises.
 ここでのAMF30は、第1実施形態におけるターゲットAMF30Bに相当し、詳細は後述するが、本発明に係る処理として、AMF30は、複数のSMF80から、アクセスタイプに応じた適切なSMF80を選択する。選択されたSMF80は、複数のUPF90から、アクセスタイプに応じた適切なUPF90を選択し、また、複数のPCF100から、アクセスタイプに応じた適切なPCF100を選択する。 The AMF 30 here corresponds to the target AMF 30B in the first embodiment, and the details thereof will be described later. As a process according to the present invention, the AMF 30 selects an appropriate SMF 80 according to the access type from a plurality of SMFs 80. The selected SMF 80 selects an appropriate UPF 90 according to the access type from the plurality of UPFs 90, and selects an appropriate PCF 100 according to the access type from the plurality of PCFs 100.
 以下、図4~図6を用いて、UEからの要求に基づくPDUセッション確立処理に本発明を適用した例を説明する。 An example in which the present invention is applied to PDU session establishment processing based on a request from a UE will be described below using FIGS. 4 to 6.
 まず、UEからRAN経由でPDU Session Establishment Requestが、AMFへ送信される(図4のステップ1)。このとき、AMFは、PDU Session Establishment Requestがどのアクセス方式のRAN経由で送信されてきたかによって、UEからのアクセスタイプを認識する。このようにアクセスタイプを自動認識することで、アクセスタイプに関する明示的な通知をUEから送付することが不要となる。なお、AMFは、PDU Session Establishment Requestに含まれた、アクセスタイプの明示的な通知によってアクセスタイプを認識してもよい。 First, a PDU Session Establishment Request is transmitted from the UE to the AMF via the RAN (step 1 in FIG. 4). At this time, the AMF recognizes the access type from the UE depending on which access method RAN has transmitted a PDU Session Establishment Request. By thus automatically recognizing the access type, it becomes unnecessary to send an explicit notification on the access type from the UE. Note that the AMF may recognize the access type by explicit notification of the access type included in the PDU Session Establishment Request.
 そして、AMFは、PDU Sessionに係る適切なSMFを以下のように選択する(ステップ2)。例えば、図5に示すように、AMFは、NRFへ問い合わせることで適切なSMFを選択する。即ち、AMFが、上記のようにして認識したアクセスタイプ(図5では「Access Network Type」と表記)を含んだNnrf_NF Discovery_requestをNRFへ送信すると(図5のステップ1)、NRFは、受信したNnrf_NF Discovery_requestに応える処理として、アクセスタイプに応じた適切なSMFを選択し(図5のステップ2)、選択されたSMF情報を含んだNnrf_NF Discovery_responseをAMFへ応答する(図5のステップ3)。これにより、AMFは、アクセスタイプに応じた適切なSMFを選択できる。なお、図4のステップ2では、AMFは、NRFへ問い合わせる以外に、AMF自身で、アクセスタイプに応じたSMFを選択してもよい。 Then, the AMF selects an appropriate SMF related to the PDU Session as follows (step 2). For example, as shown in FIG. 5, the AMF selects an appropriate SMF by querying the NRF. That is, when the AMF transmits an Nnrf_NF Discovery_request including the access type (indicated as “Access Network Type” in FIG. 5) recognized as described above to the NRF (Step 1 in FIG. 5), the NRF receives the received Nnrf_NF. As a process responding to Discovery_request, an appropriate SMF according to the access type is selected (Step 2 in FIG. 5), and Nnrf_NF Discovery_response including the selected SMF information is returned to the AMF (Step 3 in FIG. 5). This allows the AMF to select an appropriate SMF according to the access type. In addition, in step 2 of FIG. 4, the AMF may select an SMF corresponding to an access type by the AMF itself, in addition to inquiring to the NRF.
 その後、AMFは、選択されたSMFへNamf_PDUSession_CreateSMContextを送信することでPDU Session確立を要求し(ステップ3)、SMFは、UDMへNudm_SubscriberData_Getを送信することで加入者情報を取得し(ステップ4)、そして、PDUセッション確立に先立つ所定のユーザ認証処理(PDU Session authentication/authorization)が実行される(ステップ5)。 Thereafter, the AMF requests the PDU session establishment by sending Namf_PDUSession_CreateSMContext to the selected SMF (step 3), and the SMF obtains subscriber information by sending Nudm_SubscriberData_Get to the UDM (step 4), and A predetermined user authentication process (PDU Session authentication / authorization) prior to the establishment of a PDU session is executed (step 5).
 SMFは、例えばステップ3で受信したメッセージに含まれたアクセスタイプ情報から、又は、AMF等からの図示しないメッセージに含まれたアクセスタイプ情報から、アクセスタイプを認識する。そして、SMFは、アクセスタイプに応じた適切なPCFを選択する(ステップ6a)。このステップ6aの処理は、前述したステップ2と同様に、NRFへ問い合わせることでPCFを選択してもよいし、SMF自身でPCFを選択してもよい。その後、SMFと選択されたPCFとの間で、ポリシー制御に係る所定の処理が行われる(ステップ6b、6c)。 The SMF recognizes the access type, for example, from the access type information included in the message received in step 3 or from the access type information included in a message (not shown) from an AMF or the like. Then, the SMF selects an appropriate PCF according to the access type (step 6a). In the process of step 6a, as in step 2 described above, the PCF may be selected by inquiring to the NRF, or the PCF may be selected by the SMF itself. Thereafter, predetermined processing related to policy control is performed between the SMF and the selected PCF (steps 6 b and 6 c).
 次に、SMFは、アクセスタイプに応じた適切なUPFを選択する(ステップ7)。例えば、図6に示すように、SMFは、NRFへ問い合わせることで適切なUPFを選択する。即ち、SMFが、予め認識したアクセスタイプ(図6では「Access Network Type」と表記)を含んだNnrf_NF Discovery_requestをNRFへ送信すると(図6のステップ1)、NRFは、受信したNnrf_NF Discovery_requestに応える処理として、アクセスタイプに応じた適切なUPFを選択し(図6のステップ2)、選択されたUPF情報を含んだNnrf_NF Discovery_responseをSMFへ応答する(図6のステップ3)。これにより、SMFは、アクセスタイプに応じた適切なUPFを選択できる。なお、図4のステップ7では、SMFは、NRFへ問い合わせる以外に、SMF自身で、アクセスタイプに応じたUPFを選択してもよい。 Next, the SMF selects an appropriate UPF according to the access type (step 7). For example, as shown in FIG. 6, the SMF selects an appropriate UPF by querying the NRF. That is, when the SMF transmits Nnrf_NF Discovery_request including the previously recognized access type (denoted as “Access Network Type” in FIG. 6) to the NRF (Step 1 in FIG. 6), the NRF responds to the received Nnrf_NF Discovery_request. Then, an appropriate UPF according to the access type is selected (step 2 in FIG. 6), and an Nnrf_NF Discovery_response including the selected UPF information is returned to the SMF (step 3 in FIG. 6). This allows the SMF to select an appropriate UPF according to the access type. In addition, in step 7 of FIG. 4, the SMF may select the UPF according to the access type by the SMF itself other than inquiring to the NRF.
 その後、SMFとPCFとの間で、ポリシー制御に係る所定の処理が行われ(ステップ8a、8b)、SMFは、上記選択されたUPFへN4 Session Establishment/Modification Requestを送信し(ステップ9a)、当該UPFからの応答(N4 Session Establishment/Modification Response)を受信する(ステップ9b)。 Thereafter, predetermined processing related to policy control is performed between the SMF and the PCF (steps 8a and 8b), and the SMF transmits an N4 Session Establishment / Modification Request to the selected UPF (step 9a), A response (N4 Session Establishment / Modification Response) is received from the UPF (step 9b).
 そして、SMFは、上記ステップ3のPDU Session確立要求への応答として、Nsmf_PDUSession_CreateSMContext ResponseをAMFへ送信する(ステップ10)。 Then, the SMF transmits an Nsmf_PDUSession_CreateSMContext Response to the AMF as a response to the PDU Session establishment request in the step 3 (step 10).
 AMFは、RANへN2 PDU Session Requestを送信することでセッション確立要求を行い(ステップ11)、これに応じて、RANとUEとの間にPDU Sessionが確立され(ステップ12)、さらに、RANからAMFへN2 PDU Session Request Ackを応答することでセッション確立要求に応じた処理が完了する(ステップ13)。以後、UEからの最初の上り方向のデータ送信を含んだ所定の処理が実行される(ステップ14)。 The AMF makes a session establishment request by transmitting an N2 PDU Session Request to the RAN (step 11), and accordingly, a PDU session is established between the RAN and the UE (step 12), and further, from the RAN The process according to the session establishment request is completed by responding N2 PDU Session Request Ack to AMF (step 13). Thereafter, predetermined processing including the first uplink data transmission from the UE is performed (step 14).
 以上説明した第2実施形態によれば、UEからの要求に基づくPDUセッション確立処理に本発明を適用することで、AMFは、アクセスタイプに応じた、適切なSMFを選択でき、SMFは、アクセスタイプに応じた、適切なUPFおよびPCFを選択できる。このように、適切なアクセス処理を決定することができる。 According to the second embodiment described above, by applying the present invention to PDU session establishment processing based on a request from the UE, the AMF can select an appropriate SMF according to the access type, and the SMF accesses Appropriate UPF and PCF can be selected according to the type. In this way, appropriate access processing can be determined.
 これに伴い、アクセスタイプを基礎とせず、例えばサービス要件に基づいてアクセス先ノードを選択する場合に考えられる不都合、即ち、アクセスタイプに対し適さないノード(例えば能力的に過剰なノード)が選択されてしまう不都合を防止することができる。 Along with this, based on the service requirements, for example, a disadvantage considered when selecting an access destination node based on the service requirements, that is, a node unsuitable for the access type (for example, a node with a capacity excess) is selected Can be prevented.
 なお、上記の実施形態の説明で用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及び/又はソフトウェアの任意の組み合わせによって実現される。また、各機能ブロックの実現手段は特に限定されない。すなわち、各機能ブロックは、物理的及び/又は論理的に結合した1つの装置により実現されてもよいし、物理的及び/又は論理的に分離した2つ以上の装置を直接的及び/又は間接的に(例えば、有線及び/又は無線)で接続し、これら複数の装置により実現されてもよい。 Note that the block diagram used in the description of the above embodiment shows blocks in units of functions. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.
 例えば、上記の実施形態における通信制御ノード(NRF40、AMF30、SMF80等のノード)、端末(UE)10などは、上述したような処理を行うコンピュータとして機能してもよい。一例として、図7に、UE10のハードウェア構成の例を示すが、他の装置・ノードについても同様である。図7に示すように、UE10は、物理的には、プロセッサ1001、メモリ1002、ストレージ1003、通信装置1004、入力装置1005、出力装置1006、バス1007などを含むコンピュータ装置として構成されてもよい。 For example, the communication control nodes (nodes such as the NRF 40, the AMF 30, and the SMF 80), the terminal (UE) 10, and the like in the above embodiments may function as a computer that performs the above-described processing. As an example, although the example of the hardware constitutions of UE10 is shown in FIG. 7, it is the same also about another apparatus and node. As shown in FIG. 7, the UE 10 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like.
 なお、以下の説明では、「装置」という文言は、回路、デバイス、ユニットなどに読み替えることができる。端末10のハードウェア構成は、図に示した各装置を1つ又は複数含むように構成されてもよいし、一部の装置を含まずに構成されてもよい。 In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the terminal 10 may be configured to include one or more of the devices illustrated in the drawing, or may be configured without including some devices.
 端末10における各機能は、プロセッサ1001、メモリ1002などのハードウェア上に所定のソフトウェア(プログラム)を読み込ませることで、プロセッサ1001が演算を行い、通信装置1004による通信、メモリ1002及びストレージ1003におけるデータの読み出し及び/又は書き込みを制御することで実現される。 Each function in the terminal 10 performs a calculation by causing the processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and performs communication by the communication device 1004, data in the memory 1002 and the storage 1003. This is realized by controlling the reading and / or writing of
 プロセッサ1001は、例えば、オペレーティングシステムを動作させてコンピュータ全体を制御する。プロセッサ1001は、周辺装置とのインターフェース、制御装置、演算装置、レジスタなどを含む中央処理装置(CPU:Central Processing Unit)で構成されてもよい。例えば、端末10の各機能部は、プロセッサ1001を含んで実現されてもよい。 The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, each functional unit of the terminal 10 may be realized including the processor 1001.
 また、プロセッサ1001は、プログラム(プログラムコード)、ソフトウェアモジュール及びデータを、ストレージ1003及び/又は通信装置1004からメモリ1002に読み出し、これらに従って各種の処理を実行する。プログラムとしては、上述の実施形態で説明した動作の少なくとも一部をコンピュータに実行させるプログラムが用いられる。例えば、端末10の各機能部は、メモリ1002に格納され、プロセッサ1001で動作する制御プログラムによって実現されてもよく、他の機能ブロックについても同様に実現されてもよい。上述の各種処理は、1つのプロセッサ1001で実行される旨を説明してきたが、2以上のプロセッサ1001により同時又は逐次に実行されてもよい。プロセッサ1001は、1以上のチップで実装されてもよい。なお、プログラムは、電気通信回線を介してネットワークから送信されても良い。 Also, the processor 1001 reads a program (program code), a software module and data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, each functional unit of the terminal 10 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, or may be realized similarly for other functional blocks. The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.
 メモリ1002は、コンピュータ読み取り可能な記録媒体であり、例えば、ROM(Read Only Memory)、EPROM(Erasable Programmable ROM)、EEPROM(Electrically Erasable Programmable ROM)、RAM(Random Access Memory)などの少なくとも1つで構成されてもよい。メモリ1002は、レジスタ、キャッシュ、メインメモリ(主記憶装置)などと呼ばれてもよい。メモリ1002は、本発明の一実施形態に係る方法を実施するために実行可能なプログラム(プログラムコード)、ソフトウェアモジュールなどを保存することができる。 The memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done. The memory 1002 may be called a register, a cache, a main memory (main storage device) or the like. The memory 1002 may store a program (program code), a software module, etc. that can be executed to implement the method according to an embodiment of the present invention.
 ストレージ1003は、コンピュータ読み取り可能な記録媒体であり、例えば、CD-ROM(Compact Disc ROM)などの光ディスク、ハードディスクドライブ、フレキシブルディスク、光磁気ディスク(例えば、コンパクトディスク、デジタル多用途ディスク、Blu-ray(登録商標)ディスク)、スマートカード、フラッシュメモリ(例えば、カード、スティック、キードライブ)、フロッピー(登録商標)ディスク、磁気ストリップなどの少なくとも1つで構成されてもよい。ストレージ1003は、補助記憶装置と呼ばれてもよい。上述の記憶媒体は、例えば、メモリ1002及び/又はストレージ1003を含むデータベース、サーバその他の適切な媒体であってもよい。 The storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used. The storage 1003 may be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.
 通信装置1004は、有線及び/又は無線ネットワークを介してコンピュータ間の通信を行うためのハードウェア(送受信デバイス)であり、例えばネットワークデバイス、ネットワークコントローラ、ネットワークカード、通信モジュールなどともいう。例えば、上述の端末10の各機能部は、通信装置1004を含んで実現されてもよい。 The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, each functional unit of the above-described terminal 10 may be realized including the communication device 1004.
 入力装置1005は、外部からの入力を受け付ける入力デバイス(例えば、キーボード、マウス、マイクロフォン、スイッチ、ボタン、センサなど)である。出力装置1006は、外部への出力を実施する出力デバイス(例えば、ディスプレイ、スピーカー、LEDランプなど)である。なお、入力装置1005及び出力装置1006は、一体となった構成(例えば、タッチパネル)であってもよい。 The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
 また、プロセッサ1001、メモリ1002などの各装置は、情報を通信するためのバス1007で接続される。バス1007は、単一のバスで構成されてもよいし、装置間で異なるバスで構成されてもよい。 Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
 また、端末10は、マイクロプロセッサ、デジタル信号プロセッサ(DSP:Digital Signal Processor)、ASIC(Application Specific Integrated Circuit)、PLD(Programmable Logic Device)、FPGA(Field Programmable Gate Array)などのハードウェアを含んで構成されてもよく、当該ハードウェアにより、各機能ブロックの一部又は全てが実現されてもよい。例えば、プロセッサ1001は、これらのハードウェアの少なくとも1つで実装されてもよい。 The terminal 10 includes hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). Some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
 以上、本実施形態について詳細に説明したが、当業者にとっては、本実施形態が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本実施形態は、特許請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。したがって、本明細書の記載は、例示説明を目的とするものであり、本実施形態に対して何ら制限的な意味を有するものではない。 As mentioned above, although this embodiment was described in detail, it is clear for persons skilled in the art that this embodiment is not limited to the embodiment described in this specification. This embodiment can be implemented as a modification and a change mode, without deviating from the meaning and range of the present invention which become settled by statement of a claim. Therefore, the description of the present specification is for the purpose of illustration and does not have any limitation on the present embodiment.
 本明細書で説明した各態様/実施形態の処理手順、シーケンス、フローチャートなどは、矛盾の無い限り、順序を入れ替えてもよい。例えば、本明細書で説明した方法については、例示的な順序で様々なステップの要素を提示しており、提示した特定の順序に限定されない。 As long as there is no contradiction, the processing procedure, sequence, flow chart, etc. of each aspect / embodiment described in this specification may be reversed. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.
 入出力された情報などは特定の場所(例えば、メモリ)に保存されてもよいし、管理テーブルで管理してもよい。入出力される情報などは、上書き、更新、または追記され得る。出力された情報などは削除されてもよい。入力された情報などは他の装置へ送信されてもよい。 The input / output information may be stored in a specific place (for example, a memory), or may be managed by a management table. Information to be input or output may be overwritten, updated or added. The output information may be deleted. The input information or the like may be transmitted to another device.
 判定は、1ビットで表される値(0か1か)によって行われてもよいし、真偽値(Boolean:trueまたはfalse)によって行われてもよいし、数値の比較(例えば、所定の値との比較)によって行われてもよい。 The determination may be performed by a value (0 or 1) represented by one bit, may be performed by a boolean value (Boolean: true or false), or may be compared with a numerical value (for example, a predetermined value). Comparison with the value).
 本明細書で説明した各態様/実施形態は単独で用いてもよいし、組み合わせて用いてもよいし、実行に伴って切り替えて用いてもよい。また、所定の情報の通知(例えば、「Xであること」の通知)は、明示的に行うものに限られず、暗黙的(例えば、当該所定の情報の通知を行わない)ことによって行われてもよい。 Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution. In addition, notification of predetermined information (for example, notification of "it is X") is not limited to what is explicitly performed, but is performed by implicit (for example, not notifying of the predetermined information) It is also good.
 ソフトウェアは、ソフトウェア、ファームウェア、ミドルウェア、マイクロコード、ハードウェア記述言語と呼ばれるか、他の名称で呼ばれるかを問わず、命令、命令セット、コード、コードセグメント、プログラムコード、プログラム、サブプログラム、ソフトウェアモジュール、アプリケーション、ソフトウェアアプリケーション、ソフトウェアパッケージ、ルーチン、サブルーチン、オブジェクト、実行可能ファイル、実行スレッド、手順、機能などを意味するよう広く解釈されるべきである。 Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.
 また、ソフトウェア、命令などは、伝送媒体を介して送受信されてもよい。例えば、ソフトウェアが、同軸ケーブル、光ファイバケーブル、ツイストペア及びデジタル加入者回線(DSL)などの有線技術及び/又は赤外線、無線及びマイクロ波などの無線技術を使用してウェブサイト、サーバ、又は他のリモートソースから送信される場合、これらの有線技術及び/又は無線技術は、伝送媒体の定義内に含まれる。 Also, software, instructions, etc. may be sent and received via a transmission medium. For example, software may use a wireline technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a website, server or other using wireless technology such as infrared, radio and microwave When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.
 本明細書で説明した情報、信号などは、様々な異なる技術のいずれかを使用して表されてもよい。例えば、上記の説明全体に渡って言及され得るデータ、命令、コマンド、情報、信号、ビット、シンボル、チップなどは、電圧、電流、電磁波、磁界若しくは磁性粒子、光場若しくは光子、又はこれらの任意の組み合わせによって表されてもよい。 The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips etc that may be mentioned throughout the above description may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of
 また、本明細書で説明した情報、パラメータなどは、絶対値で表されてもよいし、所定の値からの相対値で表されてもよいし、対応する別の情報で表されてもよい。 In addition, the information, parameters, and the like described in the present specification may be represented by absolute values, may be represented by relative values from predetermined values, or may be represented by corresponding other information. .
 移動通信端末は、当業者によって、加入者局、モバイルユニット、加入者ユニット、ワイヤレスユニット、リモートユニット、モバイルデバイス、ワイヤレスデバイス、ワイヤレス通信デバイス、リモートデバイス、モバイル加入者局、アクセス端末、モバイル端末、ワイヤレス端末、リモート端末、ハンドセット、ユーザエージェント、モバイルクライアント、クライアント、またはいくつかの他の適切な用語で呼ばれる場合もある。 Mobile communication terminals may be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, by those skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.
 本明細書で使用する「判断(determining)」、「決定(determining)」という用語は、多種多様な動作を包含する場合がある。「判断」、「決定」は、例えば、判定(judging)、計算(calculating)、算出(computing)、処理(processing)、導出(deriving)、調査(investigating)、探索(looking up)(例えば、テーブル、データベースまたは別のデータ構造での探索)、確認(ascertaining)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、受信(receiving)(例えば、情報を受信すること)、送信(transmitting)(例えば、情報を送信すること)、入力(input)、出力(output)、アクセス(accessing)(例えば、メモリ中のデータにアクセスすること)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、解決(resolving)、選択(selecting)、選定(choosing)、確立(establishing)、比較(comparing)などした事を「判断」「決定」したとみなす事を含み得る。つまり、「判断」「決定」は、何らかの動作を「判断」「決定」したとみなす事を含み得る。 The terms "determining", "determining" as used herein may encompass a wide variety of operations. "Judgment", "decision" are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc. Also, "determination" and "determination" are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”. Also, "judgement" and "decision" are to be considered as "judgement" and "decision" that they have resolved (resolving), selecting (selecting), choosing (choosing), establishing (establishing), etc. May be included. That is, "judgment" "decision" may include considering that some action is "judged" "decision".
 本明細書で使用する「に基づいて」という記載は、別段に明記されていない限り、「のみに基づいて」を意味しない。言い換えれば、「に基づいて」という記載は、「のみに基づいて」と「に少なくとも基づいて」の両方を意味する。 As used herein, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."
 本明細書で「第1~」、「第2~」などの呼称を使用した場合においては、その要素へのいかなる参照も、それらの要素の量または順序を全般的に限定するものではない。これらの呼称は、2つ以上の要素間を区別する便利な方法として本明細書で使用され得る。したがって、第1および第2の要素への参照は、2つの要素のみがそこで採用され得ること、または何らかの形で第1の要素が第2の要素に先行しなければならないことを意味しない。 Where the designations "first", "second" etc. are used herein, any reference to that element does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken there, or that in any way the first element must precede the second element.
 「含む(include)」、「含んでいる(including)」、およびそれらの変形が、本明細書あるいは特許請求の範囲で使用されている限り、これら用語は、用語「備える(comprising)」と同様に、包括的であることが意図される。さらに、本明細書あるいは特許請求の範囲において使用されている用語「または(or)」は、排他的論理和ではないことが意図される。 As long as "includes", "including", and variations thereof are used in the present specification or claims, these terms as well as the term "comprising" Is intended to be comprehensive. Further, it is intended that the term "or" as used in the present specification or in the claims is not an exclusive OR.
 本明細書において、文脈または技術的に明らかに1つのみしか存在しない装置である場合以外は、複数の装置をも含むものとする。本開示の全体において、文脈から明らかに単数を示したものではなければ、複数のものを含むものとする。 In the present specification, a plurality of devices are also included unless it is a device clearly having only one context or technically. Throughout this disclosure, unless the context clearly indicates otherwise, it is intended to include the plural.
 1a、1b…通信システム、10…端末(UE)、20…RAN、30…AMF、30A…イニシャルAMF、30B…ターゲットAMF、40…NRF、50…UDM、60…NSSF、70…AUSF、80…SMF、90…UPF、100…PCF、1001…プロセッサ、1002…メモリ、1003…ストレージ、1004…通信装置、1005…入力装置、1006…出力装置、1007…バス。 1a, 1b ... communication system, 10 ... terminal (UE), 20 ... RAN, 30 ... AMF, 30A ... initial AMF, 30B ... target AMF, 40 ... NRF, 50 ... UDM, 60 ... NSSF, 70 ... AUSF, 80 ... SMF, 90: UPF, 100: PCF, 1001: processor, 1002: memory, 1003: storage, 1004: communication device, 1005: input device, 1006: output device, 1007: bus.

Claims (6)

  1.  ネットワークインフラ上に仮想ネットワークであるスライスが論理的に生成される通信システムにて、通信制御を行う通信制御ノードによって実行される通信制御方法であって、
     端末によるネットワークへのアクセス方式を示すアクセスタイプを取得するステップと、
     取得されたアクセスタイプに基づいて、前記スライスを構成するスライス構成要素へのアクセス処理を決定するステップと、
     を備える通信制御方法。
    A communication control method executed by a communication control node performing communication control in a communication system in which a slice, which is a virtual network, is logically generated on a network infrastructure, comprising:
    Obtaining an access type indicating a method of terminal access to the network;
    Determining an access process to slice components constituting the slice based on the acquired access type;
    A communication control method comprising:
  2.  前記取得するステップにおいて、前記通信制御ノードは、前記端末によりアクセスされたネットワークの種別を識別することにより、前記アクセスタイプを取得する、
     請求項1に記載の通信制御方法。
    In the acquiring step, the communication control node acquires the access type by identifying a type of a network accessed by the terminal.
    The communication control method according to claim 1.
  3.  前記通信制御ノードは、前記アクセス処理を決定する専用のノードであるNRF(ネットワーク・リポジトリ・ファンクション)を含む、
     請求項1又は2に記載の通信制御方法。
    The communication control node includes a network repository function (NRF) that is a dedicated node that determines the access process.
    A communication control method according to claim 1 or 2.
  4.  前記NRFは、前記通信システムに含まれるAMF(アクセス・アンド・モビリティ・マネジメント・ファンクション)から、前記アクセスタイプ、および、アクセスすべきSMF(セッション・マネジメント・ファンクション)の問合せを受信し、前記アクセスタイプに基づいて前記アクセスすべきSMFを決定し、決定した前記アクセスすべきSMFを前記AMFへ応答する、
     請求項3に記載の通信制御方法。
    The NRF receives an inquiry of the access type and an SMF (session management function) to be accessed from an access and mobility management function (AMF) included in the communication system, and the access type Determining the SMF to be accessed on the basis of the AMF, and responding the determined SMF to be accessed to the AMF,
    The communication control method according to claim 3.
  5.  前記NRFは、前記通信システムに含まれるSMF(セッション・マネジメント・ファンクション)から、前記アクセスタイプ、および、アクセスすべきUPF(ユーザ・プレーン・ファンクション)の問合せを受信し、前記アクセスタイプに基づいて前記アクセスすべきUPFを決定し、決定した前記アクセスすべきUPFを前記SMFへ応答する、
     請求項3又は4に記載の通信制御方法。
    The NRF receives an inquiry of the access type and a UPF (user plane function) to be accessed from an SMF (session management function) included in the communication system, and the NRF is based on the access type. Determining the UPF to be accessed, and responding the determined UPF to be accessed to the SMF;
    The communication control method according to claim 3 or 4.
  6.  ネットワークインフラ上に仮想ネットワークであるスライスが論理的に生成される通信システムであって、
     端末によるネットワークへのアクセス方式を示すアクセスタイプを取得し、取得されたアクセスタイプに基づいて、前記スライスを構成するスライス構成要素へのアクセス処理を決定する通信制御ノード、
     を備える通信システム。
    A communication system in which slices, which are virtual networks, are logically generated on a network infrastructure, and
    A communication control node which acquires an access type indicating a method of access to a network by a terminal, and determines access processing to slice components constituting the slice based on the acquired access type,
    A communication system comprising
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EP4192064A4 (en) * 2020-07-31 2024-01-17 Vivo Mobile Communication Co Ltd Access control method and apparatus, and communication device

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