WO2018173567A1

WO2018173567A1 - Node and migration method

Info

Publication number: WO2018173567A1
Application number: PCT/JP2018/005316
Authority: WO
Inventors: 拓也下城; 滋岩科; 雅純清水; 淳巳之口; マラレディサマ; スリサクルタコルスリ; イルファンアリ
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2017-03-22
Filing date: 2018-02-15
Publication date: 2018-09-27
Also published as: JP2018160770A

Abstract

The purpose of the present invention is to enable a mobile terminal to access a corresponding slice even in a different network. A UDM 10 is a node of a 5GS 1 including a plurality of slices, each being a virtual network generated on a network infrastructure, and is provided with: an association information storage unit 100 which stores association information in which NSSAI for designating one of the plurality of slices included in the 5GS 1 is associated with a DCN ID for designating a slice included in a 4G eDecor 2 which is different from the 5GS 1; and a specific information transmission unit 101 which, when the NSSAI is received from the 5G UE 3, transmits, to a corresponding 5G UE 3, the DCN ID associated with the received NSSAI in the association information stored in the association information storage unit 100.

Description

Node and migration method

The present invention relates to a node and a migration method for enabling a mobile terminal accessing a slice (virtual network generated on a network infrastructure) included in a network to access a slice included in another network.

In Non-Patent Document 1 below, a UE (User Equipment) is connected to a slice specified by NSAI (Network Slice Selection Assistance information) in a 5G network system (5GS) that includes multiple slices. Is disclosed.

Non-Patent Document 2 below discloses that a UE is connected to a slice specified by a DCN ID (Dedicated Core Network ID) in a 4G (4th Generation, 4th generation mobile communication system) network (4G eDecor) including a plurality of slices. Has been.

However, compatibility between 5GS and eDecor is not guaranteed. Therefore, for example, a UE accessing a slice included in 5GS cannot access a corresponding slice included in eDecor. That is, the UE cannot access the corresponding slice in different networks.

Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a node and a migration method capable of making a mobile terminal accessible to a corresponding slice even in different networks.

In order to solve the above problem, a node according to an aspect of the present invention is a node of a first network including a plurality of slices that are virtual networks generated on a network infrastructure, and the plurality of slices included in the first network A storage unit that stores correspondence information that associates first identification information for identifying one of the first identification information and second identification information for identifying a slice included in a second network different from the first network And, when receiving the first specific information from the portable terminal, the transmitting unit that transmits the second specific information associated with the first specific information received in the correspondence information stored by the storage unit to the portable terminal And comprising.

According to such a node, when the first specific information is received from the mobile terminal, the second specific information associated with the first specific information received in the correspondence information is transmitted to the mobile terminal. Thereby, for example, the mobile terminal that accesses one slice among the plurality of slices included in the first network specified by the first specifying information is the second specifying information transmitted from the node, and the first specifying information It is possible to access a slice of the second network specified by the second specifying information associated with. That is, a mobile terminal that accesses a slice included in the first network can access a corresponding slice included in the second network. That is, according to such a node, a portable terminal can be made accessible to a corresponding slice even in different networks.

According to the present invention, it is possible to make a mobile terminal accessible to a corresponding slice even in different networks.

It is a system configuration figure of the network system concerning this embodiment. It is a figure which shows the system configuration example of a 5G network system. It is a figure which shows the system configuration example of 4G network. It is a functional block diagram of UDM concerning this embodiment. It is a hardware block diagram of UDM concerning this embodiment. It is a figure which shows the example of a table of correspondence information. It is a sequence diagram which shows the 1st example of the process at the time of position registration among the migration processes performed by the network system which concerns on this embodiment. It is a sequence diagram which shows the 2nd example of the process at the time of position registration among the migration processes performed by the network system which concerns on this embodiment. It is a figure which shows the example of a table of the correspondence information which 5G UE hold | maintains after position registration. It is a sequence diagram which shows the process at the time of access to 4G network among the migration processes performed by the network system which concerns on this embodiment. It is a figure which shows the example of a table of the correspondence information in the modification of the network system which concerns on this embodiment. It is a sequence diagram which shows the process at the time of access to 4G network among the migration processes performed by the modification of the network system which concerns on this embodiment.

Hereinafter, embodiments of the node and the migration method will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The embodiments in the following description are specific examples of the present invention, and are not limited to these embodiments unless specifically described to limit the present invention.

FIG. 1 is a system configuration diagram of a network system 4 according to the present embodiment. As shown in FIG. 1, the network system 4 (network system) includes 5GS1 (first network), 4G eDecor2 (second network), and 5G UE3 (mobile terminal).

5GS1 is a 5G network system including a plurality of slices. That is, 5GS1 is a mobile communication network. A slice (or network slice) is a virtual network or a service network that is logically generated on a network infrastructure by virtually separating links and node resources of a network device and combining the separated resources. Slices separate resources and do not interfere with each other. The service refers to a service using network resources such as a communication service (private line service or the like) or an application service (service using a moving image distribution or sensor device such as an embedded device). As shown in FIG. 1, 5GS1 includes a plurality of slices NS-1, NS-2,..., NS-x.

FIG. 2 is a diagram illustrating a system configuration example of 5GS1. 5GS1 shown in FIG. 2 is 5G UE3, eNB (evolved Node B) which is a radio base station apparatus, AMF (Access and Mobility Management Function) which is a mobility management function, and a plurality of SMF (Session Management Function which is a session management function). ). For details of the components of 5GS1, such as eNB, AMF, and SMF, refer to Non-Patent Document 1 and various documents related to 5G. In 5GS1, one SMF manages corresponding slices (network slice, network slice, NS). In 5GS1, NSAI (first specific information) is used as a parameter when selecting a slice. NSAI is composed of a plurality of S-NSSAIs. That is, NSAI is a set of a plurality of S-NSSAIs. Examples of each S-NSSAI include “service type”, “slice type”, and “slice differentiator”. S-NSSAI includes SD (Slice Differentiator) and SST (Slice / Service type). In FIG. 2, 5G UE3 can receive S-NSSAI from the network side at the time of registration request. The eNB selects a Common CP (Control Plane) according to NSAI. For example, S-NSSAI # 1 (included in NSSAI) selects Common CP # 1. In addition, the AMF receives the NSSAI from the 5G UE 3 via the eNB, and selects an SMF (or a slice managed by the SMF) based on the received NSSAI. In the present embodiment, NSSAI and S-NSSAI are appropriately handled in the same row (identified). That is, in this embodiment, NSSAI and S-NSSAI may be appropriately replaced.

Referring back to FIG. 1, 4G eDecor2 is a 4G network including a plurality of slices. That is, 4G eDecor2 is a mobile communication network. As shown in FIG. 1, 4G eDecor2 includes a plurality of slices NS-A, NS-B,..., NS-y.

FIG. 3 is a diagram illustrating a system configuration example of 4G eDecor2. 4G eDecor2 shown in FIG. 3 is a user terminal UE, eNB, a mobility control entity MME (Mobility Management Entity), a user information database HSS (Home Subscriber Serve), a gateway device SGW (Serving Gateway) and It includes SGW / PGW (Packet data network Gateway). For details of the components of 4G eDecor2, such as UE, eNB, MME, HSS, SGW, and PGW, refer to the above-mentioned Non-Patent Document 2 and various documents related to 4G. In 4G eDecor2, a combination of MME and SGW or SGW / PGW corresponds to a slice (or a dedicated core network). In 4G eDecor2, the DCN ID (second specific information) is used as a parameter when selecting a slice. In 4G eDecor2, slice selection is performed in the eNB based on the DCN ID. For example, in FIG. 3, the eNB that has received the DCN ID indicating the DCN ID # 1 from the UE selects the slice 1 specified by the DCN ID # 1.

Returning to FIG. 1, 5G UE3 is a user terminal in 5G. Specifically, the 5G UE3 is a computer device such as a mobile communication terminal, a smartphone, or a laptop computer that performs 5G and 4G mobile communication.

Here, the preconditions assumed in the present embodiment will be described. First, 5G UE3 accesses the slice corresponding to NSSAI that 5G UE3 transmitted to 5GS1 among the plurality of slices included in 5GS1. Next, the 5G UE3 moves physically, and moves to an area where 5GS1 is not provided and 4G eDecor2 is provided. Next, 5G UE3 accesses 4G eDecor2. The above is a prerequisite.

According to the network system 4 of this embodiment, when accessing the 4G eDecor2, the 5G UE3 can access a slice included in the 4G eDecor2, which corresponds to the slice accessed by the 5GS1. it can. In other words, the 5G UE3 is a slice corresponding to the 5GS1 slice selected based on the NSAI transmitted by the 5G UE3 to the 5GS1 when accessing the 4G eDecor2, and is included in the 4G eDecor2. You can access the slices. In order to realize this, in the network system 4, UDM or AMF manages the corresponding DCN ID based on the UE information (mobile terminal information) related to 5GS1. The UE information is, for example, IMSI (International Mobile Subscriber Identity). When 5G UE3 registers with 5GS1, 5GS1 notifies 5G UE3 of the DCN ID corresponding to NSAI. Then, the 5G UE3 uses the received DCN ID when accessing the 4G eDecor2. This will be specifically described below.

FIG. 4 is a functional block diagram of the UDM 10 (node) included in 5GS1 (which is a component of 5GS1). As illustrated in FIG. 4, the UDM 10 includes a correspondence information storage unit 100 (storage unit) and a specific information transmission unit 101 (transmission unit).

The functional block diagram shown in FIG. 4 shows functional unit blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.

For example, the UDM 10 may function as a computer. FIG. 5 is a diagram illustrating an example of a hardware configuration of the UDM 10. The UDM 10 described above 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.

In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the UDM 10 may be configured to include one or a plurality of devices illustrated in FIG. 5 or may be configured not to include some devices.

Each function in the UDM 10 reads predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an operation to perform communication by the communication device 1004 and data in the memory 1002 and the storage 1003. This is realized by controlling reading and / or writing.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the specific information transmission unit 101 described above may be realized by the processor 1001.

Further, the processor 1001 reads programs (program codes), software modules, and data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the present embodiment is used. For example, the above-described specific information transmission unit 101 or the like 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. Although the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

The memory 1002 is a computer-readable recording medium and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to perform the paging method according to the present embodiment.

The storage 1003 is a computer-readable recording medium such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003. For example, the above-described correspondence information storage unit 100 and the like may be realized by the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. For example, the specific information transmitting unit 101 described above may be realized by 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, etc.) that accepts 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 have an integrated configuration (for example, a touch panel).

Also, 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 with a single bus or may be configured with different buses between apparatuses.

The UDM 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). Alternatively, some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.

Hereinafter, each functional block of the UDM 10 shown in FIG. 4 will be described.

The correspondence information storage unit 100 specifies S-NSSAI (or NSSAI) for specifying one of a plurality of slices included in 5GS1 and a slice included in 4G eDecor2, which is a network different from 5GS1. The correspondence information in which the DCN ID is associated is stored. The correspondence information may further be associated with UE information regarding 5G UE3. FIG. 6 is a diagram illustrating a table example of correspondence information stored by the correspondence information storage unit 100. In the example of the correspondence information table shown in FIG. 6A, S-NSSAI and DCN ID are associated with each other. Note that the S-NSSAI and DCN ID are the same information and are not conscious of 4G / 5G, so parameters may overlap. Also, the expression method such as bit length may be different. In the correspondence information table example shown in FIG. 6B, UE information, S-NSSAI, and DCN ID are associated with each other.

Returning to FIG. 4, when the NS1 is received from the 5G UE 3 (via another node or the like), the specific information transmission unit 101 is associated with the NSAI received in the correspondence information stored by the correspondence information storage unit 100. The extracted DCN ID is extracted, and the extracted DCN ID is transmitted to the 5G UE 3 (via another node or the like). The specific information transmission unit 101 receives the NSSAI and the UE received in the correspondence information stored by the correspondence information storage unit 100 when receiving the NSSAI and the UE information related to the 5G UE3 from the 5G UE3 (via another node or the like). The DCN ID associated with the information may be extracted, and the extracted DCN ID may be transmitted to the 5G UE 3 (via another node or the like).

The specific information transmission unit 101 may transmit the DCN ID to the 5G UE3 when the 5G UE3 registers the location in the 5GS1. More specifically, when the 5G UE3 registers its location with the 5GS1, the specific information transmission unit 101 (from the location registration request) from the 5G UE3 (via another node or the like) NSAI (and the UE related to the 5G UE3) Information), the DCN ID associated with the NSAI (and UE information) received in the correspondence information stored by the correspondence information storage unit 100 is extracted, and the extracted DCN ID is extracted to the 5G UE3 ( (Via another node or the like).

Hereinafter, processing of the network system 4 including processing of the UDM 10 will be described with reference to FIGS. 7 and 8. FIG. 7 is a sequence diagram showing a first example of processing at the time of location registration in 5GS1 among migration processing (migration method) executed by the network system 4. As shown in FIG. 7, 5GS1 includes 5G UE3, 5G RAN (Radio Access Network), Default AMF, Dedicated AMF, UDM10, and SMF (Session Management Function) and UPF (User Plane Function). To do. Also, it is assumed that the UE information of 5G UE3 is transferred together in the whole process (or a part).

In FIG. 7, first, a Registration Request, which is a location registration request, is transmitted from the 5G UE 3 to the 5G RAN (step S1). The request includes NSAI (Configured NSSAI). The NSSAI includes S-NSSAI-1 and S-NSSAI-2. Next, it is determined that 5G RAN transfers to Default AMF for the initial connection from 5G UE3 (step S2). Next, a Registration Request is transmitted from the 5G RAN to the Default AMF (step S3). The request includes the NSAI transmitted in S1. Next, a Subscription Request is transmitted from the Default AMF to the UDM 10 (step S4). The request includes the NSAI transmitted in S3. Next, the DCN ID corresponding to the NSAI (and 5G UE3 UE information) transmitted in S4 is extracted from the correspondence information stored in the correspondence information storage unit 100 by the specific information transmission unit 101 of the UDM 10 ( Search) (step S5). Next, the DCN ID extracted in S5 and the accepted NSAI (Accepted NSSAI) are transmitted from the UDM 10 to the Default AMF (Step S6).

Next, in the default AMF, if the UDM 10 does not send a DCN ID in S6, a DCN ID corresponding to the UE information of the 5G UE3 is generated based on the correspondence information stored in advance in the Default AMF (step S7). ). Next, S8a or S8b described later is executed by Default AMF (and 5G RAN). That is, the Reroute NAS message is transmitted from the Default AMF to the 5G RAN, and then from the 5G RAN to the Dedicated AMF (the message includes the NSAI and DCN-ID transmitted in S6). (Step S8a), or the Reroute NAS message is transmitted from the Default AMF to the Dedicated AMF (the message includes the NSAI and DCN-ID transmitted in S6) (Step S8b). Next, UP Establishment Req / Resp is transmitted / received between Dedicated AMF and SMF and UPF (step S9). Next, Registration Response is transmitted from Dedicated AMF to 5G UE 3 (step S10). The response includes the NSAI and DCN-ID transmitted in S8a or S8b.

FIG. 8 is a sequence diagram showing a second example (different from the first example) of the process at the time of location registration in 5GS1 among the migration processes (migration method) executed by the network system 4. Hereinafter, differences from the sequence diagram described with reference to FIG. 7 will be mainly described.

In FIG. 8, S20 to S22 are the same as S1 to S3 in FIG. S23a and S23b are the same as S8a and S8b in FIG. 7, respectively. S24 to S26 are the same as S4 to S6 in FIG. 7, respectively, and the difference is that the transmission source of S4 and the transmission destination of S6 are changed from Default AMF to Dedicated AMF. S27 is the same as S7 in FIG. 7, and the difference is that the processing subject (and the storage source of the correspondence information) has been changed from Default AMF to Dedicated AMF. S28 and S29 are the same as S9 and S10 of FIG. 7, respectively.

As described above, the 5G UE3 is notified of the DCN ID corresponding to the S-NSSAI. After S10 in FIG. 7 (after location registration), or after S29 in FIG. 8 (after location registration), 5G UE3 that received the DCN ID from 5GS1 (UDM10) receives the DCN ID in S1 or S20. The transmitted S-NSSAI and the information identifying the application scheduled to be used in the slice specified by the S-NSSAI are stored in the local terminal in association with each other. FIG. 9 is a diagram illustrating a table example of correspondence information held by the 5G UE after location registration. In the correspondence information table example shown in FIG. 9, information for identifying an application, S-NSSAI, and DCN ID are associated with each other.

Subsequently, a procedure when accessing the 4G eDecor2 by the 5G UE3 that has received the DCN ID from the 5GS1 (UDM10) will be described with reference to FIG. FIG. 10 is a sequence diagram showing processing at the time of accessing 4G eDecor 2 among the migration processing executed by the network system 4 according to the present embodiment. Note that 4G eDecor2 includes 5G UE3, 4G RAN, Default MME, Dedicated MME, HSS, and Dedicated S / PGW as shown in FIG.

In FIG. 10, first, an Attach Request that is an attach request is transmitted from the 5G UE 3 to the 4G RAN (step S30). The request includes a DCN ID (Accepted DCN ID) and an APN (Access Point Name) received from 5GS1 (UDM10). Next, in the 4G RAN, it is determined to transfer to the Default MME for the initial connection from the 5G UE3 (step S31). Next, an Attach Request is transmitted from the 4G RAN to the Default MME (step S32). The request includes the DCN ID and APN transmitted in S30. Next, a UE subscription request is transmitted from the default MME to the HSS (step S33). The request includes the DCN ID transmitted in S32. Next, a UE subscription Response is transmitted from the HSS to the Default MME (step S34). The request includes one or more DCN IDs (Subscribed DCN ID (s)) corresponding to the DCN ID transmitted in S33.

Next, a Re-route Request is transmitted from the Default MME to the 4G RAN, and then from the 4G RAN to the Dedicated MME (step S35). The message includes GUMMEI (Globally Unique MME Identifier), the DCN ID sent in S34, and the APN sent in S32. Next, Create Session Req / Resp is transmitted and received between the Dedicated MME and the Dedicated S / PGW (step S36). Next, Attach Accept is transmitted from Dedicated MME to 5G UE3 (step S37). The accept includes the DCN ID transmitted in S35 and a policy for mapping the DCN ID to the application in the 5G UE3.

Subsequently, a network system 4A that is a modification of the network system 4 will be described. Note that the components of the network system 4A are almost the same as the components of the network system 4 (the reference numeral of the component of the network system 4A is omitted at the end), and only the difference is described below. explain. The precondition assumed in the modification is that the 5G UE that has registered the location in 5GS1 as usual based on the existing technology accesses 4G eDecor2. According to the network system 4A of the present modification, when accessing the 4G eDecor2, the 5G UE transmits NSSAI to the 4G eDecor2, as in the existing technology, and is a slice included in the 4G eDecor2, A slice corresponding to the slice (in 5GS1) specified by the NSSAI can be accessed. In order to realize this, in the network system 4A, the HSS stores in advance correspondence information in which the S-NSSAI and the DCN ID are associated with each other from the 5G UE (other nodes). The DCN ID associated with the transmitted NSSAI is extracted, and the 5G UE is accessed to the slice specified by the extracted DCN ID. This will be specifically described below.

FIG. 11 is a diagram showing a table example of correspondence information stored in advance by the HSS included in the 4G eDecor 2 in the network system 4A. In the correspondence information table example shown in FIG. 11, the S-NSSAI and the DCN ID are associated with each other. Note that the S-NSSAI and DCN ID are the same information and are not conscious of 4G / 5G, so parameters may overlap. Also, the expression method such as bit length may be different.

FIG. 12 is a sequence diagram showing processing at the time of accessing 4G eDecor 2 in the migration processing executed by the network system 4A. First, an Attach Request that is an attach request is transmitted from the 5G UE to the RAN (step S40). The request includes NSAI and APN (as usual). Here, the S-NSSAI constituting the NSSAI is entered in the DCN ID field. Next, it is determined to transfer to the Default MME for the initial connection from the 5G UE at the RAN (step S41). RAN can select MME from either DCN ID or SD. Next, an Attach Request is transmitted from the RAN to the Default MME (step S42). The request includes the NSAI and APN transmitted in S40. Next, a UE subscription request is transmitted from the default MME to the HSS (step S43). The request includes the NSAI transmitted in S42. Next, one or more DCN IDs corresponding to the NSAI (or NSSAI SD) transmitted in S43 are extracted (searched) by the HSS using the correspondence information stored in advance (step S44). Next, one or more DCN IDs (Subscribed DCN ID (s)) extracted in S44 are transmitted from the HSS to the Default MME (Step S45).

Next, a Re-route Request is transmitted from the Default MME to the RAN, and then from the RAN to the Dedicated MME (Step S46). The message includes GUMMEI, the DCN ID sent in S45, and the APN sent in S42. Next, Create Session Req / Resp is transmitted and received between the Dedicated MME and the Dedicated S / PGW (step S47). Next, Attach Accept is transmitted from the Dedicated MME to the 5G UE (step S48). The accept includes the DCN ID transmitted in S46 and the policy for mapping the DCN ID to the application in the 5G UE.

As described above, the 5G UE can handle the existing technology including the RAN and the core network by inserting the S-NSSAI constituting the NSSAI into the DCN ID field. In this case, the SD in the S-NSSAI works the same as the DCN ID (the network side ignores the SST in the S-NSSAI). This can also be realized by the 5G UE putting the S-NSSAI constituting the NSSAI in the Option field, but in that case, the correspondence information previously stored by the HSS is stored in advance by the RAN and the core network, etc. There is a need to.

Next, operational effects of the network system 4 configured as in the present embodiment will be described.

Here, conventionally, it is not considered that the 5G UE accesses the slice included in the 5GS after moving to the area where the 4G eDecor is provided and accessing the slice included in the corresponding 4G eDecor. . That is, backward compatibility from 5GS to 4G eDecor was not ensured. From the viewpoint of backward compatibility, it is necessary to associate NSAI with DCN ID.

According to the network system 4 (included in the UDM 10) configured as in the present embodiment, when the NSAI is received from the 5G UE 3, the DCN ID associated with the NSAI received in the correspondence information is the 5G Sent to UE3. Thereby, for example, 5G UE3 that accesses one slice among a plurality of slices included in 5GS1 specified by NSAI is a DCN ID transmitted from UDM10 and specified by a DCN ID associated with NSAI. 4G eDecor2 slices can be accessed. That is, 5G UE3 that accesses a slice included in 5GS1 can access a corresponding slice included in 4G eDecor2. That is, according to such a network system 4 (UDM 10 included therein), it is possible to make 5GS1 accessible to a corresponding slice even in a different network.

Further, according to the network system 4 configured as in the present embodiment (the UDM 10 included therein), the correspondence information is further associated with the UE information, and is associated with the NSSAI and the UE information received in the correspondence information. Since the received DCN ID can be transmitted to the 5G UE3, the 5G UE3 can be accessed to UE information, for example, a slice of 4G eDecor2 along the characteristics of the 5G UE3. Thereby, the access destination of 5G UE3 can be adjusted more flexibly.

Further, according to the network system 4 (including the UDM 10) configured as in the present embodiment, 5GS1 is a mobile communication network, and when 5G UE3 registers its location in 5GS1, the DCN ID is registered in 5G UE3. Sent. Thereby, 5G UE3 can acquire DCN ID only by performing the existing location registration process, without performing other special processes. In other words, in constructing the network system 4, since existing nodes and processes can be used almost as they are, it is cost-effective and there is no need to perform special processes. Therefore, a DCN ID can be acquired at a higher speed. it can.

As mentioned above, although this embodiment was described in detail, it is clear for those skilled in the art that this embodiment is not limited to embodiment described in this specification. The present embodiment can be implemented as a modification and change without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present embodiment.

The notification of information is not limited to the aspect / embodiment described in this specification, and may be performed by other methods. For example, notification of information includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. The RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.

Each aspect / embodiment described in this specification includes LTE, LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark) The present invention may be applied to a system using other appropriate systems and / or a next-generation system extended based on these systems.

The processing procedures, sequences, flowcharts and the like of each aspect / embodiment described in this specification may be switched in order as long as there is no contradiction. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.

The specific operation that is performed by a specific device in this specification may be performed by the upper node in some cases. For example, when a specific device is a base station, various operations performed for communication with a terminal in a network including one or more network nodes having the base station are as follows: It is clear that this can be done by the base station and / or other network nodes other than the base station (for example, but not limited to MME or S-GW). Although the case where there is one network node other than the base station in the above is illustrated, a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

Information etc. can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information or the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

The determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).

Each aspect / embodiment described in this specification may be used alone, in combination, or may be switched according to execution. In addition, notification of predetermined information (for example, notification of being “X”) is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.

Software, whether it is called software, firmware, middleware, microcode, hardware description language, or other names, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be interpreted broadly.

Further, software, instructions, etc. may be transmitted / received via a transmission medium. For example, software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission media.

The information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of

Note that the terms described in this specification and / or terms necessary for understanding this specification may be replaced with terms having the same or similar meaning. For example, the channel and / or symbol may be a signal. The signal may be a message. Further, the component carrier (CC) may be called a carrier frequency, a cell, or the like.

The terms “system” and “network” used in this specification are used interchangeably.

In addition, information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information. . For example, the radio resource may be indicated by an index.

The names used for the above parameters are not limited in any way. Further, mathematical formulas and the like that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements (eg, TPC, etc.) can be identified by any suitable name, the various names assigned to these various channels and information elements are However, it is not limited.

The base station can accommodate one or a plurality of (for example, three) cells (also called sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, indoor small base station RRH: Remote Communication service can also be provided by Radio Head). The term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein. A base station may also be called in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, and small cell.

A mobile communication terminal is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, It may also be referred to as a wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.

As used herein, the terms “determining” and “determining” may encompass a wide variety of actions. “Judgment” and “determination” are, for example, calculating, computing, processing, deriving, investigating, looking up (eg, table, database or another (Search in the data structure), and confirming (ascertaining) that it is “determined” and “determined” may be included. In addition, “determination” and “determination” are reception (for example, receiving information), transmission (for example, transmitting information), input (input), output (output), and access. (Accessing) (eg, accessing data in a memory) may be considered as “determined” or “determined”. In addition, “determination” and “determination” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “determining”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.

The terms “connected”, “coupled”, or any variation thereof, means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements. The coupling or connection between the elements may be physical, logical, or a combination thereof. As used herein, the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples By using electromagnetic energy, such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.

As used herein, the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

In the present specification, when a designation such as “first” or “second” is used, any reference to the element does not generally limit the quantity or order of the elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.

“Means” in the configuration of each apparatus may be replaced with “unit”, “circuit”, “device”, and the like.

As long as "include", "including", and variations thereof are used in the specification or claims, these terms are similar to the term "comprising". It is intended to be comprehensive. Furthermore, the term “or” as used herein or in the claims is not intended to be an exclusive OR. In this specification, a plurality of devices are also included unless there is only one device that is clearly present in context or technically.

In the whole of the present disclosure, a plural is included unless it is clearly indicated by a context.

1 ... 5GS, 2 ... 4G eDecor, 3 ... 5G UE, 4 ... network system, 10 ... UDM, 100 ... corresponding information storage unit, 101 ... specific information transmitting unit.

Claims

A node of a first network including a plurality of slices which are virtual networks generated on a network infrastructure,
First specifying information for specifying one of the plurality of slices included in the first network and second specifying information for specifying a slice included in a second network different from the first network A storage unit that stores correspondence information that associates
When receiving the first specific information from the portable terminal, the second specific information associated with the first specific information received in the correspondence information stored by the storage unit is transmitted to the portable terminal. A transmitter to
A node comprising
The correspondence information is further associated with mobile terminal information related to the mobile terminal,
When the transmission unit receives the first identification information and the portable terminal information related to the portable terminal from the portable terminal, the transmission unit receives the first identification information and the portable information received in the correspondence information stored by the storage unit Transmitting the second specific information associated with the terminal information to the mobile terminal;
The node according to claim 1.
The first network is a mobile communication network;
The transmitting unit transmits the second specific information to the mobile terminal when the mobile terminal registers a location in the first network.
The node according to claim 1 or 2.
First identification information for identifying one slice of the plurality of slices included in the first network, the first network node including a plurality of slices that are virtual networks generated on the network infrastructure; Migration by a network system including a node including a storage unit that stores correspondence information that associates second specifying information for specifying a slice included in a second network different from the first network, and a mobile terminal A method,
A first access step in which the portable terminal accesses the first network;
When the node is accessed by the portable terminal in the first access step and receives the first specific information from the portable terminal, the node received in the correspondence information stored by the storage unit A transmitting step of transmitting the second specific information associated with the first specific information to the mobile terminal;
A second access step in which the mobile terminal accesses a slice of the second network identified by the second identification information transmitted in the transmission step;
Migration method that includes