TWI809888B - Communication system, computer readable memory medium and communication control method - Google Patents

Abstract

A communication system is provided, the system is provided with: an information obtaining unit, used to obtain: slice identification information associated with a communication terminal in a mobile network; terminal identification information of the communication terminal; information of a base station where the communication terminal is located Base station identification information; and path information in the IP network, an importing part, which imports the information obtained by the information obtaining part into a routing table corresponding to the slice identification information in a router relaying between the mobile network and the IP network wherein; and a transmission control unit, which uses segment routing (Segment Routing) control in the router to transmit the packet of the communication terminal according to the path information.

Description

Communication system, computer readable memory medium and communication control method

The invention relates to a communication system, a computer-readable memory medium and a communication control method.

In the network slice (Network slice) technology of mobile networks, S-NSSAI (Single Network Slice Selection Assistance Information) is used to identify slices (as shown in Patent Document 1).

[Prior Art Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2021-022889

According to an embodiment of the present invention, a communication system is provided. The communication system may have an information obtaining unit for obtaining: slice identification information associated with the communication terminal in the mobile network; terminal identification information of the communication terminal; base station identification information of the base station where the communication terminal is located; and IP network Route information on the road. The communication system may include an importing unit that imports the information obtained by the information obtaining unit into a routing table corresponding to the slice identification information in a router that relays between the mobile network and the IP network. The communication system may have a transmission control unit, which uses segment routing control in the router to transmit the packet of the communication terminal according to the path information.

The transmission control unit may use SRv6 (Segment Routing IPv6) in the router to control the transmission of the packet of the communication terminal based on the route information. In the above-mentioned router, the above-mentioned transmission control unit may assign A header in the form of IPv6 addresses containing a plurality of destinations based on the path information corresponding to the slice identification information in a locator field. The importing unit may import the information acquired by the information acquiring unit as a routing table corresponding to the slice identification information in the router relaying the mobile network and the Internet, and import it into a VRF (Virtual Virtual Reality Network) associated with the SRv6 information. routing and forwarding) routing table. The information acquisition unit may acquire a network instance corresponding to the S-NSSAI associated with the communication terminal as the slice identification information. The communication system may include: a service specifying unit that specifies a service desired by a user of the communication terminal; and determining slices in the mobile network and path information in the IP network based on the service specified by the service specifying unit. The determination unit, and the information acquisition unit may acquire the slice identification information and the path information of the slice determined by the determination unit.

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

According to an embodiment of the present invention, a communication control method executed by a computer is provided. The communication control method may have an information obtaining stage, which is used to obtain: slice identification information associated with the communication terminal in the mobile network; terminal identification information of the communication terminal; base station identification information of the base station where the communication terminal is located; and IP network Path information in . The communication control method may include an import stage of importing information acquired in the information acquisition stage into a routing table corresponding to the slice identification information in a router relaying between the mobile network and the IP network. The communication control method may have a transmission control stage, in which the segment routing control is used in the router to transmit the packet of the communication terminal according to the path information.

The above summary of the invention does not list all essential features of the invention. In addition, subcombinations of these feature groups may also constitute inventions.

10: System

20: Gather Communications Building

22: Communication Building

100: core network

102, 104, 106: Network slicing

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

342, 344, 346: Network slicing structure

400: N4 server

402: Information Acquisition Department

404: Import department

406: Transmission Control Department

408: Service Specific Department

410: Decision Department

500, 502, 504, 506: communication terminals

1200: computer

1210: host controller

1212:CPU

1214: RAM

1216: Graphics controller

1218: display device

1220: Input/Output Controller

1222: communication interface

1224: memory device

1230:ROM

1240: Input/Output Chip

FIG. 1 is a schematic diagram showing an example of the construction of the system 10 .

FIG. 2 is a schematic diagram showing an example of the logical configuration of system 10 .

FIG. 3 is a schematic diagram showing an example of network slicing structure.

FIG. 4 is a schematic diagram showing an example of a network slicing structure.

FIG. 5 is a schematic diagram showing an example of the functional structure of the N4 server 400 .

FIG. 6 is a schematic diagram showing an example of the hardware structure of a computer 1200 functioning as the N4 server 400 , the UPF 120 , or the SMF 140 .

Although the technology for identifying network slices in mobile networks is known, it is closed in mobile networks. It is hoped to provide management technology for network slicing including IP network. For example, in mobile networks, IP networks, and MEC (Multi-access Edge Computing), it is hoped to realize a network slice structure that penetrates each network slice at one time. In 3GPP TR29.892, it is recorded that the network instance can use the local configuration (local configuration) of UPF (User Plane Function) and the identifier of the network other than the 5G (5th Generation) core (including VLAN (Virtual Local Area Network) , MPLS (Multi-Protocol Label Switching) and SRv6), although there is no clear method recorded, but the corresponding point is limited to UPF, and cannot be associated with anything other than UPF, so it is difficult to realize a one-time through network slice structure . In addition, in the IETF draft VTN (Virtual Transport Network), the outline of handling SRv6 etc. as a VTN is described, but there is no way to make VTN correspond to other slices such as 5G, and it is difficult to realize a one-time through-network slice structure of. In the system 10 of the present embodiment, techniques are provided that facilitate the realization of such a configuration.

The present invention is described below through the embodiments of the present invention, but the following embodiments do not limit the inventions related to the scope of the patent application. In addition, all combinations of features described in the embodiments are not necessarily essential to the solution means of the present invention.

FIG. 1 is a schematic diagram showing an example of the construction of the system 10 . System 10 constitutes a mobile network. In this embodiment, the case where the system 10 constitutes a 5G-based mobile network is mainly used as an example for illustration, but it is not limited thereto. The system 10 can constitute a mobile network based on LTE (Long Term Evolution) and 4G (4th Generation). The system 10 can constitute a mobile network based on 6G (6th Generation).

The system 10 includes a core network 100 . The core network 100 may be a 5GC (5G core network). System 10 may include router 110 . System 10 may include a plurality of routers 220 . A plurality of routers 220 are housed in, for example, a communication building 22 , and are connected to one or a plurality of wireless base stations 210 . A plurality of routers 220 are 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 smartphone. Communication terminal 500 may also be a tablet terminal. Communication terminal 500 may also be a PC (Personal Computer). Communication terminal 500 may also be a wearable terminal. Communication terminal 500 may also be an IoT (Internet of Thing) terminal. Communication terminal 500 can include everything conforming 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 . The router 110 relays between the mobile network and the IP network. The core network 100 may be accommodated in the aggregated communication building 20, or may be arranged outside the aggregated communication building.

FIG. 2 is a schematic diagram showing an example of the logical configuration of system 10 . AN200 includes a wireless base station 210, a router 220, and the like. The core network 100 includes: UPF 120, 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 Function) ) 170, and N4 server 400.

The UPF 120 performs routing and transmission of user packets. In addition to the connection point function to DN (Data Network) 300, UPF 120 also performs the function of anchor point (Anchor Point) when switching. function, the implementation function of policy control, and the monitoring function of traffic usage. UPF 120 is connected to DN 300 through router 110 . DN 300 may be an IP network. DN 300 includes Internet 310 . DN 300 may contain cloud/MEC 320 .

AMF 130 is responsible for functions such as registrant management, connection management, and mobility management. The SMF 140 is responsible for the session management function, responsible for the allocation and management of the IP address of the communication terminal 500, the selection and control of the UPF 120, and the like. The NSSF 150 is responsible for selecting an instance of the network slice that provides services for the communication terminal 500 . AUSF 160 is responsible for the authentication function of communication terminal 500 . UDM 170 holds subscriber contract information and authentication information.

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

NEF is responsible for exposing information within the mobile network to external applications, as well as information received from external applications. The NRF maintains configuration files of NFIs in the mobile network, and is responsible for discovering and notifying queried NFIs and the NIF services they provide. NWDAF is responsible for providing analysis information of network status. The OCS is responsible for online billing processing.

The N4 server 400 executes the process of connecting the slices in the mobile network and the slices in the DN 300 at one time. N4 server 400 obtains, for example, the slice identifier assigned to communication terminal 500 by NSSF 150 , terminal identification information of communication terminal 500 , base station identification information of wireless base station 210 where communication terminal 500 is located, and route information of DN 300 . The 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 are not limited thereto, and any information may be used as long as communication terminal 500 can be identified. Examples of base station identification information include gNBID and PCI (Physical Cell ID), but are not limited thereto, and any information may be used as long as the wireless base station 210 can be identified. The route information in DN 300 corresponds to the chip identifier of communication terminal 500 and indicates a route suitable for a service desired by the user of communication terminal 500 .

The N4 server 400 obtains, for example, route information specified by the communication carrier that manages the core network 100 . The N4 server 400 can also acquire route information notified from the outside through NEF or the like. The N4 server 400 may automatically determine a route suitable for a 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 can generate a VRF instance in the router 110 and import the obtained information into the routing table. Then, the N4 server 400 can control the router 110 so that the packet of the communication terminal 500 is transmitted by segment routing and according to the acquired path information. The N4 server 400 controls the router 110, for example, uses SRv6 to transmit the packet of the communication terminal according to the path information. According to the system 10 of this embodiment, only the information of the communication terminal 500 in the mobile network and the information of the slice of the communication terminal 500 are copied to the VRF of the router 110, so that a simple cross-connection in the mobile network can be provided. The environment between slices and IP network slices.

FIG. 3 and FIG. 4 are schematic diagrams showing an example of a network slicing structure. In this embodiment, in a mobile network (sometimes described as MN.), the network slice 102 is allocated to the communication terminal 502, the network slice 104 is allocated to the communication terminal 504, and the network slice 106 is allocated to the communication terminal 504. Terminal 506. 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 server 314 of the DN, and the service desired by the user of the communication terminal 506 is provided by the server of the DN. The situation provided by the device 316 is described as an example.

The N4 server 400 obtains for the communication terminal 502: the terminal identification information of the communication terminal 502, the base station identification information of the wireless base station 210 where the communication terminal 502 is located, the identification information of the network slice 102, and the information corresponding to the identification information of the network slice 102 Route information in the DN corresponding to the service desired by the user of the communication terminal 502 .

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

N4 server 400 similarly obtains for communication terminal 504: terminal identification information of communication terminal 504, base station identification information of wireless base station 210 where communication terminal 504 is located, identification information of network slice 104, and identification information of network slice 104 Corresponding route information in the DN corresponding to the service desired by the user of the communication terminal 504 . The N4 server 400 is also the communication terminal 506, and obtains: the terminal identification information of the communication terminal 506, the base station identification information of the wireless base station 210 where the communication terminal 506 is located, the identification information of the network slice 106, and the identification with the network slice 106 The route information in the DN corresponding to the service desired by the user of the communication terminal 506 corresponding to the information.

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 imports the identification information of the network slice 102 and the terminal identification of the communication terminal 502 into the routing table of the VRF 112. Information and base station identification information of the wireless base station where the communication terminal 502 is located. Then, the N4 server 400 configures the router 110 so as to give the packet of the communication terminal 502 a header in the form of an IPv6 address included in the location domain, as represented by the path information included in the identification information corresponding to the network slice 102 The node 311 and the server 312 in the communication path 332 as the destination. In this way, the network slice structure 342 in which MNs and DNs are connected at one time can be realized.

In addition, N4 server 400 generates VRF 114 corresponding to the identification information of network slice 104 assigned to communication terminal 504 in router 110, and imports the identification information of network slice 104 and the identification information of communication terminal 504 into the routing table of VRF 114. The terminal identification information and the base station identification information of the wireless base station where the communication terminal 504 is located. Then, the N4 server 400 configures the router 110 so as to give the packet of the communication terminal 504 a header in the form of an IPv6 address included in the location field, as indicated by the path information included in the identification information corresponding to the network slice 104 The node 311 and the server 314 in the communication path 334 as the destination. In this way, the network slice structure 344 in which MNs and DNs are connected at one time can be realized.

In addition, N4 server 400 generates VRF 116 corresponding to the identification information of network slice 106 assigned to communication terminal 506 in router 110, and imports the identification information of network slice 106 and the identification information of communication terminal 506 into the routing table of VRF 116. The terminal identification information and the base station identification information of the wireless base station where the communication terminal 506 is located. Then, the N4 server 400 configures the router 110 so as to give the packet of the communication terminal 506 a header in the form of an IPv6 address included in the location field, as represented by the path information included in the identification information corresponding to the network slice 106 The node 311 and the server 316 in the communication path 336 as the destination. In this way, the network slice structure 346 in which MNs and DNs are connected at one time can be realized.

FIG. 5 is a schematic diagram showing an example of the functional structure of the N4 server 400 . The N4 server 400 includes an information obtaining unit 402 , an importing unit 404 , a transmission control unit 406 , a service specifying unit 408 , and a determining unit 410 . The N4 server 400 does not necessarily have to have all the above-mentioned functions.

The information acquisition unit 402 acquires various information. The information acquisition unit 402 acquires relevant information on the communication terminal 500 that is the object of realizing the network slice structure that penetrates the mobile network and the IP network at one time.

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

The information obtaining unit 402 obtains slice identification information of a slice associated with the communication terminal 500 . The information obtaining unit 402 obtains the network instance corresponding to the S-NSSAI associated with the communication terminal 500 as the chip identification information. The information obtaining unit 402 receives the network instance from the UPF 120, for example.

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

The import unit 404 can generate a VRF corresponding to the slice identification information of the communication terminal 500 in the N4 server 400 . For example, the importing unit 404 generates a VRF instance corresponding to the slice identification information of the communication terminal 500 . The importing unit 404 imports the information acquired by the information acquiring unit 402 into the routing table of the VRF corresponding to the slice identification information of the communication terminal 500 . As a routing table corresponding to the slice identification information, the importing unit 404 may import the information obtained by the information obtaining unit 402 into the routing table of the VRF associated with the SRv6 information. The importing unit 404 can import chip identification information corresponding to the communication terminal 500, terminal identification information, and base station identification information of the wireless base station 210 where it is located. The importing unit 404 may import route information corresponding to the slice identification information of the communication terminal 500 .

The transmission control unit 406 can notify the router 110 of the route information of the communication terminal 500 associated with the SRv6 information corresponding to the slice identification information of the communication terminal 500 via the VRF of the N4 server 400, and import the route information of the communication terminal 500 to the router 110. In the routing table of the VRF of router 110. The transfer control unit 406 can use a routing target (root target) to control the VRF to be imported.

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

The SRv6 information of the path information of the communication terminal 500 corresponding to the slice identification information of the communication terminal 500 can indirectly identify slices generated by Flex-Algo or other slicing techniques according to the BGP color attribute.

The transmission control unit 406 controls the transmission of the packet of the communication terminal 500 in the router 110 . For example, the transmission control unit 406 controls the router 110 so that segment routing is used and based on the The path information corresponding to the slice identification information of the communication terminal 500 is used to transmit the packet of the communication terminal 500 .

The transmission control unit 406 can control the router 110 so that the packet of the communication terminal 500 is transmitted according to the path information using SRv6. The transfer control unit 406 specifies, for example, a plurality of SIDs (Segment IDs) corresponding to a plurality of destinations based on route information corresponding to slice identification information. Each location field of the plurality of SIDs respectively represents each path corresponding to the plurality of destinations and the slice identification information. Then, the transmission control unit 406 controls the router 110 to give the packet of the communication terminal 500 an IPv6-format header having an SRH (Segment Rounting Header) including the segment list in which the plurality of SIDs are set in the order of the path. Thus, the packets of the communication terminal 500 can be transmitted according to the sequence registered in the segment list, that is, according to the routing sequence of the path information.

Service specifying unit 408 specifies a service desired by the user of communication terminal 500 . For example, the user of the communication terminal 500 transmits the information of the desired service to the core network 100 through the NEF of the core network 100, and the service specifying unit 408 specifies the service by receiving the information.

The determining unit 410 can determine a slice in the mobile network based on the service specified by the service specifying unit 408 . The determining unit 410 determines a slice by, for example, selecting the UPF 120 suitable for the service specified by the service specifying unit 408 , selecting the AMF 130 , selecting the SMF 140 , selecting the data size, selecting the used frequency band, and the like.

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

The determination unit 410 determines route information indicating a route for realizing high-speed communication, for example, when the specified service requires high-speed communication. Also, for example, when the specified service requires low delay, the determination unit 410 determines route information indicating a route for achieving low delay. In addition, for example, when the specified service requires a large capacity, the determination unit 410 determines the Path information for the path of .

The determining unit 410 may also determine slices in the mobile network and path information in the IP network based on the operator's policy. The determination unit 410 may determine slices in the mobile network and route information in the IP network by referring to pre-registered operator policies. As a carrier's policy, at least any one of the type of communication terminal 500, the specification of communication terminal 500, the service desired by the user of communication terminal 500, the status of core network 100, the status of AN 200, and the status of DN 300 Or at least a combination of any of them can register appropriate slice and route information, and the like. In addition, this is just an example, and the operator's policy can be any information, as long as it can determine slices and paths. The determination unit 410 determines the slice and route information based on, for example, information related to the target communication terminal 500 or information related to the network, referring to the operator's policy.

The information acquiring unit 402 can acquire slice identification information of the slice determined by the determining unit 410 . In addition, the information acquiring unit 402 can acquire the route information determined by the determining unit 410 .

The import unit 404 can generate a VRF corresponding to the slice identification information of the communication terminal 500 in the router 110 . For example, the import unit 404 generates a VRF instance corresponding to the slice identification information of the communication terminal 500 in the router 110 . The importing unit 404 imports the information obtained by the information obtaining unit 402 into the routing table corresponding to the slice identification information of the communication terminal 500 in the router 110 . As a routing table corresponding to the slice identification information, the importing unit 404 may import the information obtained by the information obtaining unit 402 into the routing table of the VRF associated with the SRv6 information. The import unit 404 can control the import target VRF using the route destination. The importing unit 404 may import slice identification information corresponding to the communication terminal 500, terminal identification information, and base station identification information of the wireless base station 210 where it is located. The importing unit 404 may import route information corresponding to the 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 the router 110 may also constitute a communication system. The communication system may include UPF 120 . The communication system may include AMF 130 .

In the above-mentioned embodiment, the case where the system 10 is equipped with the N4 server 400 is mainly used as an example for description, but it is not limited thereto. For example, the UPF 120 may have the function of the N4 server 400 . In this case, UPF 120 may be a communication system. In addition, for example, the SMF 140 may also have the function of the N4 server 400 . In this case, SMF 140 may be a communication system.

FIG. 6 is a schematic diagram showing an example of the hardware structure of a computer 1200 functioning as the N4 server 400 , the UPF 120 , or the SMF 140 . The program installed on the computer 1200 can cause the computer 1200 to act as one or more "parts" of the device according to this embodiment, or can cause the computer 1200 to perform operations associated with the device according to this embodiment or one or more "parts" of the device according to this embodiment. "part", and/or can cause the computer 1200 to execute the process or the stage of the process according to the present embodiment. Such programs may be executed by the CPU 1212 to cause the computer 1200 to perform specific operations associated with some or all of the blocks in the flowcharts and/or block diagrams described in this specification.

The computer 1200 according to this embodiment includes a CPU 1212 , a RAM 1214 and a graphics controller 1216 , which are connected to each other through a main controller 1210 . The computer 1200 also includes input/output units such as a communication interface 1222 , a memory device 1224 , a DVD drive and an IC card driver, which are connected to the main controller 1210 through the input/output controller 1220 . The DVD drive may be a DVD-ROM drive as well as a DVD-RAM drive and the like. The memory device 1224 may be a hard disk drive, a solid state drive, and the like. Computer 1200 also includes conventional I/O units, such as ROM 1230 and keyboard, which are connected to I/O controller 1220 through I/O chip 1240 .

The CPU 1212 operates according to programs stored in the ROM 1230 and the RAM 1214 to control each unit. The graphics controller 1216 acquires the image data generated by the CPU 1212 in a frame buffer or the like provided in the RAM 1214 or in itself to cause the image data to be displayed on the display device 1218 .

The communication interface 1222 communicates with other electronic devices through the network. The memory device 1224 stores programs and data used by the CPU 1212 in the computer 1200 . DVD drive from DVD-ROM etc. to read programs or data and provide them to the memory device 1224 . The IC card driver reads programs and data from and/or writes programs and data to the IC card.

The ROM 1230 stores therein such as a boot program executed by the computer 1200 at startup and/or programs depending on the hardware of the computer 1200 . The I/O chip 1240 can also connect various I/O units to the I/O controller 1220 through a USB port, a parallel port, a serial port, a keyboard port, a mouse port, and the like.

The program can be provided using a computer readable memory medium such as DVD-ROM or IC card. The program can be read from a computer-readable storage medium, installed in the memory device 1224 , RAM 1214 , or ROM 1230 as examples of the computer-readable storage medium, and executed by the CPU 1212 . The information processing described in these programs is read by the computer 1200 and provides the programs and connections with the various types of hardware resources mentioned above. An apparatus or method may be configured to perform operations or processing of information according to the use of the computer 1200 .

For example, when performing communication between the computer 1200 and an external device, the CPU 1212 may execute a communication program loaded into the RAM 1214, and command communication processing to the communication interface 1222 based on the processing described in the communication program. Under the control of the CPU 1212, the communication interface 1222 reads the transmission data stored in the transmission buffer area provided in the recording medium such as the RAM 1214, the memory device 1224, DVD-ROM, or an IC card, and transmits the read data. Data is sent to the network, or reception data received from the network is written into a reception buffer area provided on the recording medium, etc.

The CPU 1212 can also make the RAM 1214 read all or a necessary part of the files or databases stored in external recording media such as the memory device 1224, DVD drive (DVD-ROM), IC card, etc., and the data on the RAM 1214 Perform various types of processing. Then, the CPU 1212 can write the processed data back to the external recording medium.

Various types of information such as various types of programs, data, tables, and databases can be stored in memory media and information processed. CPU 1212 records all the data read from RAM 1214 Each part of the present disclosure includes various types of operations, information processing, conditional judgment, conditional branch, unconditional branch, information retrieval/replacement, etc. specified by the instruction sequence of the program. Various types of operations can be performed and the results written back to RAM 1214 . In addition, the CPU 1212 can search information on files, databases, etc. in the recording medium. For example, in the case where a plurality of entries each having an attribute value of the first attribute associated with an attribute value of the second attribute are stored in the recording medium, the CPU 1212 may retrieve the attribute value associated with the first attribute from the plurality of entries. The entry whose value matches the specified condition reads the attribute value of the second attribute stored in the entry to obtain the attribute value of the second attribute associated with the first attribute that satisfies the predetermined condition.

The programs or software modules described above can be stored in a computer-readable storage medium on the computer 1200 or near the computer 1200 . In addition, 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 to provide the program to the computer 1200 through the network. .

Blocks in the flowcharts and block diagrams of this embodiment may represent stages of programs that perform operations or "parts" of devices that perform operations. Specific stages and "parts" may utilize dedicated circuits, programmable circuits provided by computer readable instructions stored on a computer readable memory medium and/or programmed by computer readable instructions stored on a computer readable memory medium. read instructions provided by the processor to implement. Application specific circuits may include digital and/or analog hardware circuits, and may include integrated circuits (ICs) and/or discrete circuits. Programmable circuits can include reconfigurable hardware circuits, including logical product (AND), logical sum (OR), exclusive OR (Exclusive OR), negative logical product (Negative AND), negative logical sum (NOR) And other logic operations, flip flops, registers and memory elements, such as Field Programmable Logic Gate Array (FPGA), Programmable Logic Array (PLA), etc.

A computer-readable memory medium may include any tangible device capable of storing instructions for execution by a suitable device, so that a computer-readable memory medium having instructions stored thereon will have Products are available that contain instructions that can be executed to create a means for performing the operations specified in the flowchart or block diagrams. 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 (Floppy: registered trademark) disks, floppy disks (diskette), hard disks, random access memory (RAM), read-only memory (ROM), Erasable programmable read-only memory (EPROM or flash memory), electronically erasable programmable read-only memory (EEPROM), static random access memory (SRAM), compact disc read-only memory (CD- ROM), digital versatile disc (DVD), Blu-ray (Blu-ray: registered trademark) disc, memory stick (Memory stick), integrated circuit card, etc.

Computer readable instructions may include instructions written in one or more programming languages, including assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state configuration data, or object-oriented programming languages (object-oriented programming language), such as Smalltalk (registered trademark), JAVA (registered trademark), C++, etc., and any combination of traditional programming languages such as "C" programming language or similar programming language) to write the source code (source code) or object code (object code).

Computer-readable instructions cause a processor or a programmable circuit of a general-purpose computer, a special-purpose computer, or other programmable data processing device to execute the computer-readable instructions, so as to produce a device to execute the specified in the flowchart or block diagram operation, and can be provided locally or through a wide area network (WAN) such as a local area network (LAN), the Internet, etc., to a processor or programmable circuit. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers, and the like.

As mentioned above, although this invention was demonstrated using an Example, the technical scope of this invention is not limited to the range described in the said Example. It is obvious to those skilled in the art that various changes or improvements can be made to the above-mentioned embodiments. It is clear from the description of the claims that such changes and improvements are also included in the technical scope of the present invention.

In the scope of the patent claims, the execution sequence of the actions, sequences, steps, and stages in the devices, systems, programs, and methods shown in the specification and drawings, there is no specific express "before", "before" Before" etc. In addition, it should be noted that as long as the output of the previous processing is not used in the subsequent processing, it can be realized in any order. Regarding the scope of the patent claims, the operation flow in the specification and drawings, even if the description is described using "first" and "next" for convenience, it does not mean that it must be implemented in this order.

102, 104, 106: Network slicing

110: router

112, 114, 116: VRF

200:AN

311: node

312, 314, 316: server

502, 504, 506: communication terminals

Claims (10)

A communication system, comprising: an information obtaining unit, used to obtain: identification information of a slice (slice) associated with a communication terminal in a mobile network; terminal identification information of the communication terminal; a base station where the communication terminal is located ) base station identification information; and path information in the IP network, an importing part, importing the information obtained by the information obtaining part into the router that relays between the mobile network and the IP network and identifying the slice in a routing table corresponding to the information; and a transmission control unit, which utilizes segment routing (Segment Routing) control in the router to transmit the packet of the communication terminal according to the path information. The communication system according to claim 1, wherein the transmission control unit uses SRv6 in the router to control the transmission of the packet of the communication terminal according to the path information. The communication system according to claim 2, wherein the transmission control unit, in the router, assigns a header (head) of SRH including a segment list (segment list) of a plurality of SIDs in the packet of the communication terminal, and the plurality of SIDs is based on the path information corresponding to the slice identification information. The communication system according to claim 1, wherein the importing part imports the information obtained by the information obtaining part into the routing table corresponding to the slice identification information in the router that relays with the mobile network and the Internet SRv6 information in the routing table of the associated VRF. The communication system according to claim 1, wherein the information obtaining unit obtains a network instance corresponding to the S-NSSAI associated with the communication terminal as slice identification information. The communication system of claim item 1, wherein the information acquisition unit obtains the The route information corresponding to the service desired by the user of the communication terminal. The communication system according to claim 1, wherein: a service specifying unit that specifies a service desired by the user of the communication terminal; and determining the slice in the mobile network and the IP network according to the service specified by the service specifying unit A determination unit of route information on the road, the information acquisition unit acquires the slice identification information and the route information of the slice determined by the determination unit. As in the communication system of claim 1, there is a determination unit, the determination unit determines the slice in the mobile network and the path information in the IP network according to the operator’s strategy; the information acquisition unit obtains the information obtained by the determination The slice identification information and the path information of the determined slice. A computer-readable memory medium storing a program for a communication system for a computer to execute any one of claim items 1 to 8. A communication control method is executed by a computer, which includes: an information obtaining stage, used to obtain: slice identification information associated with a communication terminal in a mobile network; terminal identification information of the communication terminal; a base station where the communication terminal is located The base station identification information; and the path information in the IP network, an import stage, the information obtained in the information acquisition stage will be imported into the router that relays between the mobile network and the IP network and the slice In the routing table corresponding to the identification information; and a transmission control stage, using segment routing control in the router to transmit the packet of the communication terminal according to the path information.