WO2022270609A1

WO2022270609A1 - Communication system, program, and communication control method

Info

Publication number: WO2022270609A1
Application number: PCT/JP2022/025209
Authority: WO
Inventors: 聡松嶋; 勝広堀場; 大輔横田
Original assignee: ソフトバンク株式会社
Priority date: 2021-06-24
Filing date: 2022-06-23
Publication date: 2022-12-29
Also published as: JP2023003881A; TW202301838A; JP7165784B1; TWI809888B

Abstract

Provided is a communication system, comprising: an information acquisition unit for acquiring slice identification information associated with a communication terminal in a mobile network, terminal identification information of the communication terminal, and base station identification information of a base station in which service area the communication terminal exists; an import unit for importing the information acquired by the information acquisition unit to a routing table that corresponds to the slice identification information in a router for relaying between the mobile network and an IP network; and a transfer control unit for exercising control in the router so that packets of the communication terminal are transferred by segment routing in accordance with route information.

Description

Communication system, program, and communication control method

The present invention relates to a communication system, program, and communication control method.

In network slicing technology in mobile networks, slices are identified by S-NSSAI (Single Network Slice Selection Assistance Information) (see, for example, Patent Document 1).
[Prior art documents]
[Patent Literature]
[Patent Document 1] JP-A-2021-022889

General disclosure

According to one embodiment of the present invention, a communication system is provided. A communication system includes slice identification information associated with a communication terminal in a mobile network, terminal identification information of the communication terminal, base station identification information of the base station in which the communication terminal is located, and route information in the IP network. and an information acquisition unit that acquires the information. The communication system may include an importer that imports the information acquired by the information acquirer into a routing table corresponding to slice identification information in a router that relays between the mobile network and the IP network. The communication system may include, in the router, a forwarding control unit that controls forwarding of the packet of the communication terminal according to route information by segment routing. The terminal identification information of the communication terminal may be, for example, an IP address assigned to the communication terminal. The base station identification information of a base station may be, for example, an IP address assigned to the N3 interface of a 5G (5th Generation) base station. The slice identification information may be, for example, a network instance name in a 5G system. The slice identity may be, for example, S-NSSAI in 5G systems.

The transfer control unit may control the router to transfer the packet of the communication terminal according to the route information by SRv6 (Segment Routing IPv6). In the router, the transfer control unit may add an IPv6 address format header including a plurality of destinations in the locator field to the packet of the communication terminal according to the route information corresponding to the slice identification information. The import unit may import the information acquired by the information acquisition unit into a VRF (Virtual Routing and Forwarding) routing table associated with SRv6 information as a routing table corresponding to the slice identification information. The transfer control unit imports the information acquired by the import unit into a routing table corresponding to the slice identification information in the router that relays the mobile network and the Internet. SRv6 information corresponding to the slice identification information. may be controlled using the route information of the above-mentioned communication terminal associated with. The import unit imports the information acquired by the information acquisition unit into a VRF routing table linked with SRv6 information as a routing table corresponding to the slice identification information in the router relaying the mobile network and the Internet. You can The information acquisition unit may acquire, as the slice identification information, a network instance corresponding to the S-NSSAI associated with the communication terminal. The information acquisition unit may acquire the route information according to the service desired by the user of the communication terminal. The communication system determines the slice in the mobile network and route information in the IP network based on a service specifying unit that specifies a service desired by the user of the communication terminal, and the service specified by the service specifying unit. and the information acquisition unit may acquire the slice identification information and the route information of the slice determined by the determination unit. The information acquisition unit may acquire the terminal identification information of the communication terminal from UPF or SMF. The information acquisition unit may acquire the terminal identification information of the communication terminal from a control signal (PFCP: Packet Forwarding Control Protocol) exchanged between UPF and SMF. The information acquisition unit may acquire the base station identification information from a radio base station in which the communication terminal is located. The information acquisition unit may acquire the base station identification information from UPF or SMF. The information acquisition unit may acquire the base station identification information of the communication terminal from a control signal (PFCP: Packet Forwarding Control Protocol) exchanged between UPF and SMF. The information acquisition unit may acquire the route information corresponding to the slice identification information. The information acquisition unit may acquire the route information set by a carrier that manages the core network. The import unit may generate, in the router, a VRF corresponding to the slice identification information of the communication terminal. The import unit may generate, in the router, a VRF instance corresponding to the slice identification information of the communication terminal. The import unit may use the route target to control the VRF to be imported. The import unit may import the slice identification information associated with the communication terminal, the terminal identification information, and the base station identification information of the radio base station in the area. The determining unit may determine the slice by selecting a UPF suitable for the service identified by the service identifying unit. The determining unit may determine the slice by selecting an AMF suitable for the service identified by the service identifying unit. The determining unit may determine the slice by selecting an SMF suitable for the service identified by the service identifying unit. The determining unit may determine the slice by selecting a data size suitable for the service identified by the service identifying unit. The determining unit may determine the slice by selecting a utilization band suitable for the service identified by the service identifying unit. The determination unit may determine route information indicating a route including, as a final destination, a server executing an application that provides the specified service. When the specified service requires high-speed communication, the determining unit may determine the route information indicating a route for realizing high-speed communication. The determination unit may determine the route information indicating a route for achieving low delay when the specified service requires low delay. The determining unit may determine the route information indicating a route for realizing a large capacity when the identified service requires a large capacity. The determination unit may determine the slice in the mobile network and the route information in the IP network by referring to a pre-registered operator's policy. At least one or at least one of the type of the communication terminal, the specifications of the communication terminal, the service desired by the user of the communication terminal, the state of the core network, the state of the AN, and the state of the DN as the policy of the business operator Appropriate slice and path information may be registered for the combination of .

According to one embodiment of the present invention, there is provided a program for causing a computer to function as the communication system.

According to one embodiment of the present invention, a computer-executed communication control method is provided. The communication control method includes slice identification information associated with a communication terminal in a mobile network, terminal identification information of the communication terminal, base station identification information of the base station in which the communication terminal is located, and path in the IP network. An information acquisition stage may be provided for acquiring information. The communication control method may comprise an importer that imports the information acquired in the information acquisition step into a routing table corresponding to slice identification information in a router that relays between the mobile network and the IP network. The communication control method may include a forwarding control step of controlling the router to forward the packet of the communication terminal according to the route information by segment routing.

It should be noted that the above outline of the invention does not list all the necessary features of the present invention. Subcombinations of these feature groups can also be inventions.

An example configuration of the system 10 is shown schematically. An example of the logical configuration of system 10 is shown schematically. 1 schematically illustrates an example network slice configuration; 1 schematically illustrates an example network slice configuration; An example of the functional configuration of the N4 server 400 is shown schematically. An example of the hardware configuration of the computer 1200 functioning as the N4 server 400, UPF 120, or SMF 140 is shown schematically.

A technique for identifying network slices in a mobile network is known, but it was closed within the mobile network. It would be desirable to provide techniques for managing network slices, including IP networks. For example, in a mobile network, an IP network, and MEC (Multi-access Edge Computing), it is desirable to realize a network slice configuration that makes each network slice consistent. In 3GPP (registered trademark) TR29.892, a network instance is assigned a network identifier (VLAN (Virtual Local Area Network), MPLS (Multi-Protocol Label Switching), MPLS (Multi-Protocol Label Switching), SRv6 ), but despite the fact that there is no clear method described, the corresponding part is limited to UPF, and it is not possible to associate with anything other than UPF, realizing a consistent network slice configuration was difficult. In addition, the IETF draft "VTN (Virtual Transport Network)" describes the outline for handling SRv6 etc. as a VTN, but there is no method for making VTN compatible with other slices such as 5G, and a continuous network Realization of the slice configuration was difficult. The system 10 according to this embodiment provides technology that contributes to the realization of such a configuration.

Although the present invention will be described below through embodiments of the invention, the following embodiments do not limit the invention according to the scope of claims. Also, not all combinations of features described in the embodiments are essential for the solution of the invention.

FIG. 1 schematically shows an example of the configuration of system 10. FIG. System 10 constitutes a mobile network. In the present embodiment, the case where the system 10 constitutes a mobile network conforming to 5G will be mainly described as an example, but the present invention is not limited to this. The system 10 may constitute a mobile network conforming to LTE (Long Term Evolution) and 4G (4th Generation). The system 10 may constitute a mobile network conforming to 6G (6th Generation).

The system 10 includes a core network 100. The core network 100 may be 5GC (5G Core network). System 10 may include router 110 . System 10 may include multiple routers 220 . Each of the multiple routers 220 is accommodated in, for example, the communication building 22 and is connected to one or multiple wireless base stations 210 . A plurality of routers 220 are also connected to the core network 100 .

The radio base station 210 may be a gNB (gNodeB). Radio base station 210 relays communication of communication terminal 500 . Communication terminal 500 may be a mobile phone such as a smart phone. Communication terminal 500 may be a tablet terminal. Communication terminal 500 may be a PC (Personal Computer). Communication terminal 500 may be a wearable terminal. Communication terminal 500 may be an IoT (Internet of Things) terminal. The communication terminal 500 can include anything applicable to IoE (Internet of Everything).

The router 110 is housed in, for example, the centralized communication building 20, and is connected to the core network 100, the Internet 310 which is an IP network, and the cloud/MEC 320. Router 110 relays between the mobile network and the IP network. Core network 100 may be housed in centralized communication building 20 or may be located outside centralized communication building 20 .

FIG. 2 schematically shows an example of the logical configuration of system 10. FIG. The AN 200 includes a radio base station 210, a router 220, and the like.コアネットワーク１００は、ＵＰＦ１２０、ＡＭＦ（Ａｃｃｅｓｓ　ａｎｄ　Ｍｏｂｉｌｉｔｙ　Ｍａｎａｇｅｍｅｎｔ　Ｆｕｎｃｔｉｏｎ）１３０、ＳＭＦ（Ｓｅｓｓｉｏｎ　Ｍａｎａｇｅｍｅｎｔ　Ｆｕｎｃｔｉｏｎ）１４０、ＮＳＳＦ（Ｎｅｔｗｏｒｋ　Ｓｌｉｃｅ　Ｓｅｌｅｃｔｉｏｎ　Ｆｕｎｃｔｉｏｎ）１５０、ＡＵＳＦ（Ａｕｔｈｅｎｔｉｃａｔｉｏｎ　Ｓｅｒｖｅｒ　Ｆｕｎｃｔｉｏｎ）１６０、ＵＤＭ（Ｕｎｉｆｉｅｄ　Ｄａｔａ　Ｆｕｎｃｉｔｏｎ）１７０、 and N4 server 400 .

The UPF 120 performs routing and forwarding of user packets. The UPF 120 performs an anchor point function at the time of handover, a policy control execution function, a traffic usage monitoring function, etc., in addition to a connection point function to the DN (Data Network) 300 . UPF 120 is connected to DN 300 via router 110 . DN 300 may be an IP network. DN 300 includes Internet 310 . DN 300 may include Cloud/MEC 320 .

The AMF 130 is responsible for functions such as registrant management, connection management, and movement management. The SMF 140 has a session management function, and is responsible for IP address allocation management to the communication terminal 500, selection/control of the UPF 120, and the like. NSSF 150 is responsible for selecting an instance of a network slice to serve communication terminal 500 . The AUSF 160 has the function of authenticating the communication terminal 500 . UDM 170 stores subscription information and authentication information.

In addition to these, the core network 100 may include NEF (Network Exposure Function), NRF (NF Repository Function), and PCF (Policy Control Function). The core network 100 may also include NWDAF (Network Data Analytics Function) and OCS (Online Charging Function).

The NEF is responsible for disclosing information within the mobile network to external applications and receiving information from external applications. The NRF maintains profiles of network function instances within the mobile network and is responsible for discovering and notifying network function instances and the network function services they provide upon inquiry. The NWDAF is responsible for providing network state analysis information. The OCS is responsible for online billing processing.

The N4 server 400 executes processing for seamlessly communicating slices within the mobile network and slices within the DN300. The N4 server 400, for example, the slice identifier assigned to the communication terminal 500 by the NSSF 150, the terminal identification information of the communication terminal 500, the base station identification information of the radio base station 210 in which the communication terminal 500 is located, and the DN300 Get route information and A slice identifier is, for example, S-NSSAI. Examples of terminal identification information include IMEI (International Mobile Equipment Identifier) and IMSI (International Mobile Subscriber Identity), but not limited to these, any information that can identify communication terminal 500 may be used. . Examples of base station identification information include gNBID and PCI (Physical Cell ID), but are not limited to these, and any information that can identify the wireless base station 210 may be used. The route information in DN 300 corresponds to the slice identifier of communication terminal 500 and indicates a route suitable for the service desired by the user of communication terminal 500 .

The N4 server 400, for example, acquires route information specified by the carrier that manages the core network 100. The N4 server 400 may acquire route information notified from the outside via NEF or the like. The N4 server 400 may automatically determine a route suitable for the service desired by the user of the communication terminal 500 and generate route information.

The N4 server 400 may generate a VRF corresponding to the slice identifier assigned to the communication terminal 500. The N4 server 400 may create a VRF instance in the router 110 and import the obtained information into the routing table. Then, the N4 server 400 may control the router 110 to transfer the packet of the communication terminal 500 by segment routing according to the acquired route information. The N4 server 400, for example, controls the router 110 so as to transfer the packet of the communication terminal according to the route information by SRv6. According to the system 10 according to the present embodiment, the information of the communication terminal 500 and the slice information of the communication terminal 500 in the mobile network can be easily transferred to the slice of the mobile network and the slice of the IP network simply by copying them to the VRF of the router 110. It is possible to provide an environment in which it is possible to pass cross-cutting.

　Figures 3 and 4 schematically show an example of a network slice configuration. In this example, in a mobile network (sometimes referred to as MN), a network slice 102 is assigned to a communication terminal 502, a network slice 104 is assigned to a communication terminal 504, and a network slice 104 is assigned to a communication terminal 506. network slices 106 are assigned. Here, the service desired by the user of the communication terminal 502 is provided by the server 312, the service desired by the user of the communication terminal 504 is provided by the DN server 314, and the service desired by the user of the communication terminal 506 is provided by the server 314. A case in which the service provided by the DN server 316 will be described as an example.

N4 server 400 provides communication terminal 502 with terminal identification information of communication terminal 502, base station identification information of radio base station 210 in which communication terminal 502 is located, identification information of network slice 102, network slice 102 and the route information in the DN corresponding to the service desired by the user of the communication terminal 502 corresponding to the identification information.

The route information indicates the final destination and the nodes 311 passed through to the final destination. The route is based on the location of the application providing the service desired by the user of the communication terminal 502, whether high-speed communication is required, whether high-reliability communication is required, and whether low-delay communication is required. can be determined by

Similarly, for communication terminal 504, N4 server 400 provides terminal identification information of communication terminal 504, base station identification information of radio base station 210 in which communication terminal 504 is located, identification information of network slice 104, Route information in the DN corresponding to the identification information of the network slice 104 and corresponding to the service desired by the user of the communication terminal 504 is acquired. Similarly, for communication terminal 506, N4 server 400 provides terminal identification information for communication terminal 506, base station identification information for radio base station 210 in which communication terminal 506 is located, identification information for network slice 106, Route information in the DN corresponding to the identification information of the network slice 106 and corresponding to the service desired by the user of the communication terminal 506 is acquired.

The N4 server 400 generates a VRF 112 corresponding to the identification information of the network slice 102 assigned to the communication terminal 502 in the router 110, and stores the identification information of the network slice 102 and the terminal identification of the communication terminal 502 in the routing table of the VRF 112. information and the base station identification information of the radio base station in which the communication terminal 502 is located. Then, the N4 server 400 transmits the IPv6 address format header included in the locator field to the node 311 and the server 312 included in the communication path 332 indicated by the path information corresponding to the identification information of the network slice 102. The router 110 is set to be attached to the packet. This makes it possible to implement a network slice configuration 342 that connects MNs and DNs.

In addition, the N4 server 400 generates a VRF 114 corresponding to the identification information of the network slice 104 assigned to the communication terminal 504 in the router 110, and stores the identification information of the network slice 104 and the identification information of the communication terminal 504 in the routing table of the VRF 114. The terminal identification information and the base station identification information of the radio base station in which the communication terminal 504 is located are imported. Then, the N4 server 400 transmits the IPv6 address format header included in the locator field to the node 311 and the server 314 included in the communication path 334 indicated by the path information corresponding to the identification information of the network slice 104. The router 110 is set to be attached to the packet. This makes it possible to realize a network slice configuration 344 that connects MNs and DNs all the way through.

In addition, the N4 server 400 generates the VRF 116 corresponding to the identification information of the network slice 106 assigned to the communication terminal 506 in the router 110, and stores the identification information of the network slice 106 and the identification information of the communication terminal 506 in the routing table of the VRF 116. The terminal identification information and the base station identification information of the radio base station in which the communication terminal 506 is located are imported. Then, the N4 server 400 transmits the IPv6 address format header included in the locator field to the node 311 and the server 316 included in the communication path 336 indicated by the path information corresponding to the identification information of the network slice 106. The router 110 is set to be attached to the packet. This makes it possible to implement a network slice configuration 346 that connects MNs and DNs all the way through.

FIG. 5 schematically shows an example of the functional configuration of the N4 server 400. The N4 server 400 comprises an information acquisition section 402 , an import section 404 , a transfer control section 406 , a service identification section 408 and a determination section 410 . It should be noted that it is not essential for the N4 server 400 to have all of these.

The information acquisition unit 402 acquires various types of information. The information acquisition unit 402 acquires information about the communication terminal 500 that is a target for implementing a network slice configuration that extends through the mobile network and the IP network.

The information acquisition unit 402 acquires terminal identification information of the communication terminal 500, for example. The information acquisition unit 402 acquires terminal identification information transmitted by the communication terminal 500, for example. The information acquisition unit 402 receives terminal identification information of the communication terminal 500 from the UPF 120 or the SMF 140, for example.

The information acquisition unit 402 acquires, for example, the base station identification information of the radio base station 210 in which the communication terminal 500 is located. The information acquisition unit 402 acquires base station information from, for example, the radio base station 210 in which the communication terminal 500 is located. The information acquisition unit 402 receives the base station identification information of the wireless base station 210 from the UPF 120 or the SMF 140, for example.

The information acquisition unit 402 acquires slice identification information of slices associated with the communication terminal 500 . Information acquisition section 402 acquires a network instance corresponding to S-NSSAI associated with communication terminal 500 as slice identification information. The information acquisition unit 402 receives the network instance from the UPF 120, for example.

The information acquisition unit 402 acquires route information in the IP network corresponding to the slice identification information of the communication terminal 500, for example. For example, the information acquisition unit 402 acquires route information according to the service desired by the user of the communication terminal 500 . The information acquisition unit 402 acquires, for example, route information set by a telecommunications carrier that manages the core network 100 .

The import unit 404 may generate a VRF corresponding to the slice identification information of the communication terminal 500 in the N4 server 400. For example, import section 404 generates a VRF instance corresponding to the slice identification information of communication terminal 500 . The import unit 404 imports the information acquired by the information acquisition unit 402 into the VRF routing table corresponding to the slice identification information of the communication terminal 500 . The import unit 404 may import the information acquired by the information acquisition unit 402 into the VRF routing table associated with the SRv6 information as the routing table corresponding to the slice identification information. The import unit 404 may import slice identification information associated with the communication terminal 500, terminal identification information, and base station identification information of the wireless base station 210 in range. The import unit 404 may import route information corresponding to slice identification information of the communication terminal 500 .

The transfer control unit 406 advertises the route information of the communication terminal 500 linked with the SRv6 information corresponding to the slice identification information of the communication terminal 500 to the router 110 via the VRF of the N4 server 400, and performs routing of the VRF of the router 110. The route information of communication terminal 500 may be imported into the table. The forwarding control unit 406 may use the route target to control the VRF to be imported.

The SRv6 information of the route information of the communication terminal 500 corresponding to the slice identification information of the communication terminal 500 may be an SID (Segment ID). The SID indicating the SRv6 information of the route information of the communication terminal 500 corresponding to the slice identification information of the communication terminal 500 may identify the slice generated by Flex-Algo, for example, by the Locator of the SID.

The SRv6 information of the route information of the communication terminal 500 corresponding to the slice identification information of the communication terminal 500 may indirectly identify slices generated by Flex-Algo or other slicing techniques by BGP color attributes.

The transfer control unit 406 controls packet transfer of the communication terminal 500 in the router 110 . For example, the transfer control unit 406 controls the router 110 to transfer the packet of the communication terminal 500 according to the route information corresponding to the slice identification information of the communication terminal 500 by segment routing.

The transfer control unit 406 may control the router 110 to transfer the packet of the communication terminal 500 according to the route information by SRv6. For example, the transfer control unit 406 identifies multiple SIDs corresponding to multiple destinations according to the route information corresponding to the slice identification information. A locator field of each of the plurality of SIDs indicates each path corresponding to the slice identification information in the plurality of destinations. Then, the transfer control unit 406 causes the router 110 to add an IPv6 format header having an SRH (Segment Running Header) including a Segment list in which the plurality of SIDs are set according to the order of the route to the packet of the communication terminal 500. Control. As a result, the packets of the communication terminal 500 can be transferred in the order registered in the Segment list, that is, in the order of the routes in the route information.

The service specifying unit 408 specifies the service desired by the user of the communication terminal 500. For example, the user of communication terminal 500 transmits information on a desired service to core network 100 via NEF of core network 100, and service identification unit 408 identifies the service by receiving the information.

The determining unit 410 may determine a slice in the mobile network based on the service identified by the service identifying unit 408. The determining unit 410 selects, for example, the UPF 120 suitable for the service identified by the service identifying unit 408, the AMF 130, the SMF 140, the data size, and the bandwidth to be used. to determine the slice.

The determination unit 410 may determine route information in the IP network corresponding to the slice identification information of the communication terminal 500 based on the service identified by the service identification unit 408 . The determining unit 410 determines, for example, route information indicating a route including, as a final destination, a server executing an application that provides the specified service.

For example, if the specified service requires high-speed communication, the determining unit 410 determines route information indicating a route for realizing high-speed communication. Further, for example, when the specified service requires low delay, the determining unit 410 determines route information indicating a route for achieving low delay. Further, for example, when the specified service requires a large capacity, the determining unit 410 decides route information indicating a route for realizing the large capacity.

The determining unit 410 may determine slices in the mobile network and route information in the IP network based on the operator's policy. The determination unit 410 may refer to a pre-registered operator's policy to determine slices in the mobile network and route information in the IP network. Type of communication terminal 500, specifications of communication terminal 500, service desired by user of communication terminal 500, state of core network 100, state of AN 200, and state of DN 300, or at least one Appropriate slice and route information and the like can be registered for the combination of . Note that these are only examples, and the provider's policy may be any information as long as it can determine slices and routes. The determining unit 410 determines slices and path information by referring to the policy of the operator based on information about the target communication terminal 500 and information about the network, for example.

The information acquisition unit 402 may acquire slice identification information of the slice determined by the determination unit 410 . Also, the information acquisition unit 402 may acquire the route information determined by the determination unit 410 .

Note that the import unit 404 may generate a VRF corresponding to the slice identification information of the communication terminal 500 in the router 110 . For example, the import unit 404 creates a VRF instance corresponding to the slice identification information of the communication terminal 500 in the router 110 . The import unit 404 imports the information acquired by the information acquisition unit 402 into the routing table corresponding to the slice identification information of the communication terminal 500 in the router 110 . The import unit 404 may import the information acquired by the information acquisition unit 402 into the VRF routing table associated with the SRv6 information as the routing table corresponding to the slice identification information. The import unit 404 may use the route target to control the VRF to be imported. The import unit 404 may import slice identification information associated with the communication terminal 500, terminal identification information, and base station identification information of the wireless base station 210 in range. The import unit 404 may import route information corresponding to slice identification information of the communication terminal 500 .

The N4 server 400 may be an example of a communication system. The N4 server 400 and router 110 may constitute a communication system. The communication system may include UPF 120 . The communication system may include AMF 130 .

In the above embodiment, the case where the system 10 includes the N4 server 400 has been mainly described as an example, but the present invention is not limited to this. For example, the UPF 120 may have the functionality of the N4 server 400 . In this case, UPF 120 may be a communication system. Also, for example, the SMF 140 may have the functions of the N4 server 400 . In this case, SMF 140 may be the communication system.

FIG. 6 schematically shows an example of the hardware configuration of a computer 1200 functioning as the N4 server 400, UPF 120, or SMF 140. FIG. Programs installed on the computer 1200 cause the computer 1200 to function as one or more "parts" of the apparatus of the present embodiments, or cause the computer 1200 to operate or perform operations associated with the apparatus of the present invention. Multiple "units" can be executed and/or the computer 1200 can be caused to execute the process or steps of the process according to the present invention. Such programs may be executed by CPU 1212 to cause computer 1200 to perform certain operations associated with some or all of the blocks in the flowcharts and block diagrams described herein.

A computer 1200 according to this embodiment includes a CPU 1212 , a RAM 1214 and a graphics controller 1216 , which are interconnected by a host controller 1210 . Computer 1200 also includes input/output units such as communication interface 1222 , storage device 1224 , DVD drive, and IC card drive, which are connected to host controller 1210 via input/output controller 1220 . The DVD drive may be a DVD-ROM drive, a DVD-RAM drive, and the like. Storage devices 1224 may be hard disk drives, solid state drives, and the like. Computer 1200 also includes legacy input/output units, such as ROM 1230 and keyboard, which are connected to input/output controller 1220 via input/output chip 1240 .

The CPU 1212 operates according to programs stored in the ROM 1230 and RAM 1214, thereby controlling each unit. Graphics controller 1216 retrieves image data generated by CPU 1212 into a frame buffer or the like provided in RAM 1214 or itself, and causes the image data to be displayed on display device 1218 .

A communication interface 1222 communicates with other electronic devices via a network. Storage device 1224 stores programs and data used by CPU 1212 within computer 1200 . The DVD drive reads programs or data from a DVD-ROM or the like and provides them to the storage device 1224 . The IC card drive reads programs and data from IC cards and/or writes programs and data to IC cards.

ROM 1230 stores therein programs such as boot programs that are executed by computer 1200 upon activation and/or programs that depend on the hardware of computer 1200 . Input/output chip 1240 may also connect various input/output units to input/output controller 1220 via USB ports, parallel ports, serial ports, keyboard ports, mouse ports, and the like.

The program is provided by a computer-readable storage medium such as a DVD-ROM or an IC card. The program is read from a computer-readable storage medium, installed in storage device 1224 , RAM 1214 , or ROM 1230 , which are also examples of computer-readable storage media, and executed by CPU 1212 . The information processing described within these programs is read by computer 1200 to provide coordination between the programs and the various types of hardware resources described above. An apparatus or method may be configured by implementing information operations or processing according to the use of computer 1200 .

For example, when communication is performed between the computer 1200 and an external device, the CPU 1212 executes a communication program loaded into the RAM 1214 and sends communication processing to the communication interface 1222 based on the processing described in the communication program. you can command. The communication interface 1222 reads transmission data stored in a transmission buffer area provided in a recording medium such as a RAM 1214, a storage device 1224, a DVD-ROM, or an IC card under the control of the CPU 1212, and transmits the read transmission data. Data is transmitted to the network, or received data received from the network is written in a receive buffer area or the like provided on the recording medium.

In addition, the CPU 1212 causes the RAM 1214 to read all or necessary portions of files or databases stored in an external recording medium such as a storage device 1224, a DVD drive (DVD-ROM), an IC card, etc. Various types of processing may be performed on the data. CPU 1212 may then write back the processed data to an external recording medium.

Various types of information such as various types of programs, data, tables, and databases may be stored in recording media and subjected to information processing. CPU 1212 performs various types of operations on data read from RAM 1214, information processing, conditional decisions, conditional branching, unconditional branching, and information retrieval, which are described throughout this disclosure and are specified by instruction sequences of programs. Various types of processing may be performed, including /replace, etc., and the results written back to RAM 1214 . In addition, the CPU 1212 may search for information in a file in a recording medium, a database, or the like. For example, when a plurality of entries each having an attribute value of a first attribute associated with an attribute value of a second attribute are stored in the recording medium, the CPU 1212 selects the first attribute from among the plurality of entries. search for an entry that matches the specified condition of the attribute value of the attribute, read the attribute value of the second attribute stored in the entry, and thereby determine the first attribute that satisfies the predetermined condition An attribute value of the associated second attribute may be obtained.

The programs or software modules described above may be stored in a computer-readable storage medium on or near computer 1200 . Also, a recording medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet can be used as a computer-readable storage medium, whereby the program can be transferred to the computer 1200 via the network. offer.

The blocks in the flowcharts and block diagrams in this embodiment may represent steps in the process in which the operations are performed or "parts" of the device responsible for performing the operations. Certain steps and "sections" may be provided with dedicated circuitry, programmable circuitry provided with computer readable instructions stored on a computer readable storage medium, and/or computer readable instructions provided with computer readable instructions stored on a computer readable storage medium. It may be implemented by a processor. Dedicated circuitry may include digital and/or analog hardware circuitry, and may include integrated circuits (ICs) and/or discrete circuitry. Programmable circuits, such as Field Programmable Gate Arrays (FPGAs), Programmable Logic Arrays (PLAs), etc., perform AND, OR, EXCLUSIVE OR, NOT AND, NOT OR, and other logical operations. , flip-flops, registers, and memory elements.

A computer-readable storage medium may comprise any tangible device capable of storing instructions to be executed by a suitable device, such that a computer-readable storage medium having instructions stored thereon may be illustrated in flowchart or block diagram form. It will comprise an article of manufacture containing instructions that can be executed to create means for performing specified operations. Examples of computer-readable storage media may include electronic storage media, magnetic storage media, optical storage media, electromagnetic storage media, semiconductor storage media, and the like. More specific examples of computer readable storage media include floppy disks, diskettes, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory) , electrically erasable programmable read only memory (EEPROM), static random access memory (SRAM), compact disc read only memory (CD-ROM), digital versatile disc (DVD), Blu-ray disc, memory stick , integrated circuit cards, and the like.

The computer readable instructions may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state configuration data, or instructions such as Smalltalk, JAVA, C++, etc. any source or object code written in any combination of one or more programming languages, including object-oriented programming languages, and conventional procedural programming languages such as the "C" programming language or similar programming languages; may include

Computer readable instructions are used to produce means for a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, or programmable circuits to perform the operations specified in the flowchart or block diagrams. A general purpose computer, special purpose computer, or other programmable data processor, locally or over a wide area network (WAN) such as the Internet, etc., to execute such computer readable instructions. It may be provided in the processor of the device or in a programmable circuit. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers, and the like.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. It is clear from the description of the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

The execution order of each process such as actions, procedures, steps, and stages in devices, systems, programs, and methods shown in claims, specifications, and drawings is etc., and it should be noted that they can be implemented in any order unless the output of a previous process is used in a later process. Regarding the operation flow in the claims, specification, and drawings, even if explanations are made using "first," "next," etc. for the sake of convenience, it means that it is essential to carry out in this order. is not.

10 system, 20 centralized communication building, 22 communication building, 100 core network, 102, 104, 106 network slice, 110 router, 112, 114, 116 VRF, 120 UPF, 130 AMF, 140 SMF, 150 NSSF, 160 AUSF, 170 UDM, 200 AN, 210 wireless base station, 220 router, 300 DN, 310 Internet, 311 node, 312, 314, 316 server, 320 cloud/MEC, 332, 334, 336 communication path, 400 N4 server, 402 information acquisition unit , 404 import unit, 406 transfer control unit, 408 service identification unit, 410 determination unit, 500, 502, 504, 506 communication terminal, 1200 computer, 1210 host controller, 1212 CPU, 1214 RAM, 1216 graphic controller, 1218 display device, 1220 input/output controller, 1222 communication interface, 1224 storage device, 1230 ROM, 1240 input/output chip

Claims

Slice identification information associated with a communication terminal in a mobile network, terminal identification information of the communication terminal, base station identification information of a base station in which the communication terminal is located, and route information in an IP network. an information acquisition unit to acquire;
an import unit that imports the information acquired by the information acquisition unit into a routing table corresponding to the slice identification information in a router that relays the mobile network and the IP network;
A communication system comprising, in the router, a transfer control unit that controls to transfer the packet of the communication terminal according to the route information by segment routing.
The communication system according to claim 1, wherein the transfer control unit controls the router to transfer the packet of the communication terminal according to the route information by SRv6.
The transfer control unit, in the router, adds a header including an SRH having a Segment list including a plurality of SIDs corresponding to a plurality of destinations according to the route information corresponding to the slice identification information to the packet of the communication terminal. 3. The communication system of claim 2, wherein the grant.
4. The import unit according to any one of claims 1 to 3, wherein the information acquired by the information acquisition unit is imported into a VRF routing table associated with SRv6 information as a routing table corresponding to the slice identification information. Communication system as described.
The transfer control unit imports the information acquired by the import unit into a routing table corresponding to the slice identification information in the router that relays the mobile network and the Internet. SRv6 information corresponding to the slice identification information. 5. The communication system according to any one of claims 1 to 4, wherein control is performed using the route information of said communication terminal with which is associated.
The communication system according to any one of claims 1 to 5, wherein said information acquisition unit acquires a network instance corresponding to S-NSSAI associated with said communication terminal as said slice identification information.
The communication system according to any one of claims 1 to 6, wherein said information acquisition unit acquires said route information according to a service desired by a user of said communication terminal.
a service identification unit that identifies a service desired by the user of the communication terminal;
a determination unit that determines a slice in the mobile network and routing information in the IP network based on the service identified by the service identification unit;
The communication system according to any one of claims 1 to 7, wherein the information acquisition unit acquires the slice identification information and the route information of the slice determined by the determination unit.
a determination unit that determines a slice in the mobile network and route information in the IP network based on an operator's policy;
The communication system according to any one of claims 1 to 7, wherein the information acquisition unit acquires the slice identification information and the route information of the slice determined by the determination unit.
A program for causing a computer to function as the communication system according to any one of claims 1 to 9.
A communication control method executed by a computer, comprising:
Slice identification information associated with a communication terminal in a mobile network, terminal identification information of the communication terminal, base station identification information of a base station in which the communication terminal is located, and route information in an IP network. an information acquisition stage to acquire;
an import step of importing the information obtained in the information obtaining step into a routing table corresponding to the slice identification information in a router that relays the mobile network and the IP network;
A communication control method comprising: a transfer control step of controlling the router to transfer the packet of the communication terminal according to the route information by segment routing.