WO2018120822A1 - Procédé, dispositif et système de migration d'ancrage de données d'utilisateur - Google Patents

Procédé, dispositif et système de migration d'ancrage de données d'utilisateur Download PDF

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Publication number
WO2018120822A1
WO2018120822A1 PCT/CN2017/094753 CN2017094753W WO2018120822A1 WO 2018120822 A1 WO2018120822 A1 WO 2018120822A1 CN 2017094753 W CN2017094753 W CN 2017094753W WO 2018120822 A1 WO2018120822 A1 WO 2018120822A1
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Prior art keywords
plane gateway
group
data plane
address
data
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PCT/CN2017/094753
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English (en)
Chinese (zh)
Inventor
苏岩
夏渊
朱泉
袁立平
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device, and system for user data anchor migration.
  • the service gateway and the PDN gateway are further separated from the control plane and the user plane (CU), and the gateway is formed after separation.
  • the control plane gateway device CGW Control GateWay
  • the data plane gateway device DGW Data GateWay
  • the CGW can control the DGW processing action on the data packet.
  • the uplink and downlink user data packets pass through the base station and the DGW, and the DGW completes data forwarding according to the established context.
  • the DGW is the anchor point for user data.
  • the backup of the DGW is generally performed.
  • the currently used DGW that is, the context information of the current active DGW is backed up to another standby DGW.
  • the standby DGW is used. Enable to take over the failed DGW to process business data.
  • the standby DGW occupies the same storage resources as the primary DWG to save the user's context, and the system efficiency is very low.
  • embodiments of the present invention provide a method, device, and system for user data anchor migration to save storage resources and improve system flexibility.
  • an embodiment of the present invention provides a method for user data anchor migration, which includes: configuring, by a control plane, a first data plane gateway as an active device of an IP group, and configuring a second data plane gateway as an IP group.
  • the IP address is assigned to the user equipment from the IP group, and the user context is established.
  • the user context information is sent to the second data plane gateway for the second data plane gateway.
  • User data packets can be processed after user context information.
  • the primary and secondary switching of the data plane gateway with the granularity of the IP group saves the storage resources and improves the use efficiency and flexibility of the system.
  • the IP group includes an interface address, and the interface address includes one or more of the following: an S1U interface address, an S5 interface address, an S8 interface address, an S4 interface address, and an S12 interface address. Further, the IP group includes an IP address or an IP address segment for assignment to the user equipment. System flexibility is further increased by configuring the interface address and UE address separately.
  • control plane gateway configures the first data plane gateway as an IP address contained in the IP group. High priority routing; configures the second data plane gateway as a low priority route for the IP address contained in the IP group. System flexibility is further increased through high and low priority routing configurations.
  • control plane gateway indicates to the first data plane gateway that the first data plane gateway is the primary device of the IP group, and the first data plane gateway issues the high priority of the IP address included in the IP group. Routing; the control plane gateway indicates to the second data plane gateway that the second data plane gateway is a backup device of the IP group, and the second data plane gateway advertises a low priority route that is itself an IP address included in the IP group. Or the control plane gateway directly issues high priority routes and low priority routes. System flexibility is further increased by different configurations.
  • sending the user context information to the second data plane gateway is triggered by the second data plane gateway receiving the user equipment uplink data packet or the downlink data packet.
  • an embodiment of the present invention provides a control plane gateway, which has the function of implementing the behavior of a control plane gateway in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more units corresponding to the functions described above, such as a configuration unit, a context unit, and a transmitting unit.
  • control plane gateway includes a processor and a memory for storing application code supporting a control plane gateway to perform the above method, the processor being configured to execute the memory Stored in the program.
  • the control plane gateway may further include a communication interface for controlling the polygon gateway to communicate with other devices.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the control plane gateway, which includes a program designed to implement the above aspects as a control plane gateway.
  • an embodiment of the present invention provides a system for user data anchor migration, including a control plane gateway, a first data plane gateway, and a second data plane gateway, each of which has a function of implementing respective behaviors in the foregoing methods.
  • FIG. 1 is a system architecture diagram of implementing user data anchor migration according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another system for implementing user data anchor migration according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for implementing user data anchor migration according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a control plane device according to an embodiment of the present invention.
  • FIG. 5 is another schematic structural diagram of a control plane device according to an embodiment of the present invention.
  • an embodiment of the present invention provides a communication system for implementing user data anchor migration, including a control plane gateway (CGW) 101, a data plane gateway (DGW) 102, and a mobility management entity (Mobility Management Entity, MME). 103, an evolved NodeB (eNB) 104, and a router 105.
  • CGW control plane gateway
  • DGW data plane gateway
  • MME mobility management entity
  • eNB evolved NodeB
  • router 105 a router 105.
  • the base station 104 provides wireless access for user equipment (User Equipment, UE).
  • the mobility management entity 103 is used for access control, mobility management, and the like of the UE.
  • the data plane gateway 102 is used for data of the UE passing through the base station to the external network Internet. connection.
  • the control plane gateway 101 is configured to control the processing action of the data plane gateway on the data packet.
  • the router 105 is used to physically connect the above devices and is connected to the external network Internet. The router in the figure is usually deployed as a router network to connect the above devices of the mobile core network.
  • FIG. 1 indicates the signaling connection relationship between the devices.
  • the two-way arrow between the data plane gateway 102 and the base station 104 and the Internet indicates the logical link relationship of the UE to send and receive data.
  • Figure 1 includes two data plane gateways, one for the primary use of the IP group and one for the backup of the IP group.
  • the data plane gateway and the control plane gateway may be network elements separated by the service gateway CU, or may be the network elements separated by the PDN gateway CU, or may be the network elements separated by the CU after the service gateway and the PDN gateway are combined.
  • the IP group includes the interface address used to process the user data packet.
  • the interface address includes one or more of the following: S1U interface address, S5 interface address, S8 interface address, S4 interface address, and S12 interface address.
  • the IP group also includes a set of user IP addresses or address segments for assigning to the user equipment to access the wireless network. When the IP group is switched between primary and backup, that is, when the data anchor is migrated, the route of the interface address and the user address in the IP group are switched from the data plane gateway 1 to the data plane gateway 2.
  • one CGW may control multiple DGWs, and multiple IP groups may be configured on each DGW.
  • one CGW may control dozens of DGWs, each DGW has several hundred groups, and each group may have several thousand users, so that one CGW service may serve millions of users.
  • These DGWs can be backups of IP groups to each other.
  • IP group 1 is mainly used for DGW1, DGW2 is reserved, and IP group 2 is mainly used for DGW2, and DGW1 is reserved.
  • Multiple IP groups on one DGW can be backed up by different DGWs.
  • There are IP groups 1, 2, and 3 for DGW1, and their standby DGWs are DGW2, DGW3, and DGW4.
  • the primary and backup data plane gateways of different IP groups can be flexibly configured.
  • the granularity of data anchor migration is the IP group.
  • the CGW can allocate different IP groups on different DGWs according to the load sharing algorithm.
  • the selection of the primary and backup DGWs of the IP group can be considered by the operator based on factors such as location and capacity.
  • the functions of the SDN controller and the switch are similar to those of the foregoing router, and the CGW sends the routing information of the IP group to the router.
  • the SDN controller is then converted into a flow table entry by the controller and sent to the switch by using the OpenFlow protocol Openflow.
  • the SDN controller may be built in the CGW or the SDN switch may be built in the DGW. I will not repeat them here.
  • the specific method flow of the data anchor migration below is exemplified by the system of FIG. 1.
  • the method for user data anchor migration provided by the embodiment of the present invention is applied to the system shown in FIG.
  • the CGW configures the DGW1 and the DGW2 as the primary and backup devices of the IP group respectively.
  • the service is migrated from the active device to the standby device. Specifically, the following steps are included:
  • the DGW1 sends a configuration request message to the CGW. This can be sent after the DGW1 is powered on, or it can be sent according to the system configuration command.
  • the CGW allocates an IP group, and carries the allocated IP group information in the configuration response message to the DGW1, and carries the primary standby indication information in the configuration response message, indicating that the DGW1 is the primary DGW of the IP group.
  • the IP group includes interface addresses of the IP group, such as an interface such as an S1U address, an S5/S8 address, an S4 address, and an S12 address.
  • the IP group may also include an IP address or address segment that will be subsequently assigned to the user equipment.
  • the DGW1 configures an interface address according to the configuration response message, and advertises the high priority route of the IP group to the router according to the primary standby indication information.
  • the advertised route may use Border Gateway Protocol (BGP) or Open Shortest Path First (OSPF).
  • BGP Border Gateway Protocol
  • OSPF Open Shortest Path First
  • the route advertised by DGW1 to the router indicates that DGW1 is a high priority route of the IP address contained in the IP group.
  • Table 1 below is a publish to route Two routes in the device.
  • the DGW2 sends a configuration request message to the CGW. Similarly, this can be sent after the DGW2 is powered on, or it can be sent according to the system configuration command.
  • the CGW carries the IP group information that is assigned in the step 302 to the DGW2 in the configuration response message, and carries the primary standby indication information in the configuration response message, indicating that the DGW2 is the standby DGW of the IP group.
  • the DGW2 configures an interface address according to the configuration response message, and advertises the low priority route of the IP group to the router according to the primary and backup indication information. DGW2 can also use BGP, OSPF, etc. to advertise routes. The route advertised by DGW2 to the router indicates that DGW2 is a low priority route of the IP address contained in the IP group. For example, Table 2 below shows the two routes that are published to the router.
  • the router contains the high priority and low priority routes of the above IP group. After receiving the data packet, the router preferentially forwards the data packet with a higher priority. If the route with the higher priority is unreachable, the route with the lower priority is forwarded. package. After the above route is advertised, DGW1 is the primary device of the IP group, and the related uplink and downlink data packets are preferentially forwarded to DGW1 for processing.
  • the CGW sends a session generation request to DGW1.
  • the DGW1 allocates an IP address of the UE from a user IP address or an address segment of the IP group, and establishes a user context. The DGW 1 then returns a session generation response to the CGW containing the user context information.
  • the user context of the DGW may include an interface address (S1U/S5/S8 address), a Tunnel Endpoint Identifier (TEID), a UE IP address, an Access Point Name (APN), and a Quality of Service (Quality of Service). , QoS), billing attributes, etc.
  • the context of the CGW may include: a UE identifier, an MSISDN number (Mobile Subscriber Integrated Services Digital Network), an IMSI number (International Mobile Subscriber Identity), an IP group to which the UE IP address belongs, and the like.
  • the DGW1 may provide the uplink of the uplink and downlink data packets for the user equipment UE.
  • the router performs route switching when the DGW1 is unreachable. For example, the DGW1 fails, and the router does not receive the heartbeat message of the DGW1. Or the physical connection between the DGW1 and the router is broken, causing the router to detect the signal of the physical line connecting the DGW1.
  • the router considers that DGW1 is unreachable, and the router enables low-priority routes for data forwarding.
  • the router can also switch to enable low priority routes when it receives a switch command.
  • the uplink and downlink data packets originally sent to DGW1 will be forwarded to DGW2.
  • the DGW2 receives the uplink or downlink data packet of the user in the IP group, but the DGW2 does not have a user context for processing the data packet, and the DGW2 sends an error indication message to the CGW, where the key information of the user context is obtained in the data packet. (such as the tunnel identifier in the upstream packet or the destination address in the downstream packet).
  • the CGW finds the corresponding UE identifier according to the key information in the error indication message, and sends the user context information corresponding to the UE identifier, including the interface address, the TEID, the UE IP address, and the APN, to the DGW2, and the DGW2 receives the user context. Information, complete the forwarding processing of the data packet.
  • the CGW can also send all the created user contexts corresponding to the IP group in which the UE identifier is located to the DGW2, and all the user contexts corresponding to the IP group can be restored.
  • the subsequent DGW2 can directly process the uplink and downlink data packets of the relevant users. Forwarding processing.
  • the CGW may also directly advertise the high priority route and the low priority route to the router. That is, the CGW can directly release the routing information of Table 1 and Table 2 to the router. In this way, DGW1 and DGW2 do not have to issue routes.
  • the CGW may also not notify the primary and backup indication information described in steps 302 and 305 of DGW1 and DGW2.
  • one CGW may control multiple DGWs, and multiple IP groups may be configured on each DGW.
  • These DGWs can be backups of IP groups to each other.
  • IP group 1 is mainly used for DGW1, DGW2 is reserved, and IP group 2 is mainly used for DGW2, and DGW1 is reserved.
  • Multiple IP groups on one DGW can be backed up by different DGWs.
  • DGW1 has IP group 1, IP group 2, and IP group 3.
  • DGW1 is the primary device of these three families, and their backup devices are DGW2, DGW3, and DGW4, respectively.
  • the primary and backup data plane gateways of different IP groups can be flexibly configured.
  • the granularity of data anchor migration is the IP group.
  • the CGW can allocate different IP groups on different DGWs according to the load sharing algorithm.
  • the selection of the primary and backup DGWs of the IP group can be considered by the operator based on factors such as location and capacity.
  • IP group 1 and IP group 2 use DGW1 as the primary device
  • IP group 3 uses DGW1 as the backup device.
  • the DGW1 will be configured with the interface addresses of the three IP groups, and each group interface address includes the S1U address and S5. /S8 address, S4 address, S12 address and other interface addresses.
  • the embodiment of the present invention further provides a schematic diagram of a control plane gateway.
  • the method includes: a configuration unit 401, a context unit 402, and a sending unit 403. among them:
  • the configuration unit is configured to configure a primary data plane gateway as an active device of the IP group, and configure a second data plane gateway as a backup device of the IP group;
  • the context unit is configured to allocate an IP address for the user equipment from the IP group, and establish a user context
  • the sending unit is configured to send user context information to the second data plane gateway, where the user context information is used by the second data plane gateway to process the user data packet after the anchor point migration.
  • control plane device is presented in the form of a functional unit.
  • a "unit” herein may refer to an application-specific integrated circuit (ASIC), circuitry, a processor and memory that executes one or more software or firmware programs, integrated logic circuitry, and/or other functions that provide the functionality described above.
  • ASIC application-specific integrated circuit
  • processor and memory that executes one or more software or firmware programs, integrated logic circuitry, and/or other functions that provide the functionality described above.
  • control plane device can be implemented with a processor, memory, and communication interface.
  • FIG. 5 is a schematic diagram of a computer device according to an embodiment of the present invention.
  • the computer device includes at least one processor 501, a communication bus 502, a memory 503, and at least one communication interface 504, and may further include an IO interface 505.
  • Processor 501 can be a general purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present invention.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • Communication bus 502 can include a path for communicating information between the components described above.
  • the communication interface 504 uses devices such as any transceiver for communicating with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), and the like.
  • RAN Radio Access Network
  • WLAN Wireless Local Area Networks
  • the memory 503 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions.
  • the dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this.
  • the memory can exist independently and be connected to the processor via a bus.
  • the memory can also be integrated with the processor.
  • the memory 503 is used to store application code for executing the solution of the present invention, and is controlled by the processor 501 for execution.
  • the processor 501 is configured to execute application code stored in the memory 503.
  • the processor 501 may include one or more CPUs, and each CPU may be a single-core processor or a multi-core processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.
  • the computer device can also include an input/output (I/O) interface 505.
  • the output device can be a liquid crystal display (LCD), a light-emitting diode (light) (Emission diode, LED) display device, cathode ray tube (CRT) display device, or projector (projector).
  • the input device can be a mouse, a keyboard, a touch screen device, or a sensing device.
  • the computer device described above may be a general purpose computer device or a special purpose computer device.
  • the computer device may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet, a wireless terminal device, a communication device, an embedded device, or the like in FIG. Structured equipment.
  • PDA personal digital assistant
  • Embodiments of the invention do not limit the type of computer device.
  • the control plane device in FIG. 1 may be the device shown in FIG. 5, and one or more software modules are stored in the memory 503.
  • the control plane device can implement the software module by implementing the software module through the processor and the program code in the memory.
  • the embodiment of the present invention further provides a computer storage medium for storing computer software instructions for use in the apparatus shown in FIG. 4 or FIG. 5, which includes a program designed to execute the foregoing method embodiments.
  • the above method can be implemented by executing a stored program.
  • embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program is stored/distributed in a suitable medium, provided with other hardware or as part of the hardware, or in other distributed forms, such as over the Internet or other wired or wireless telecommunication systems.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un dispositif et un système de migration d'ancrage de données d'utilisateur. Le procédé comprend principalement les étapes suivantes : une passerelle de plan de commande configure une première passerelle de plan de données en tant que dispositif principal d'un groupe IP, et configure une seconde passerelle de plan de données en tant que dispositif de veille du groupe IP ; une adresse IP est attribuée, à partir du groupe IP, à un équipement utilisateur, et un contexte utilisateur est établi ; et après la migration, la passerelle de plan de commande envoie des informations de contexte utilisateur à la seconde passerelle de plan de données. Dans la présente invention, la migration d'ancrage d'un groupe IP est effectuée au moyen de la granularité, ce qui permet d'améliorer la flexibilité d'un système et d'économiser une ressource de stockage.
PCT/CN2017/094753 2016-12-30 2017-07-27 Procédé, dispositif et système de migration d'ancrage de données d'utilisateur WO2018120822A1 (fr)

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CN110958719B (zh) * 2018-09-27 2023-05-30 中兴通讯股份有限公司 Ue迁移方法、nrf、备用smf、系统及存储介质
CN112737806B (zh) 2019-10-28 2022-05-13 华为技术有限公司 网络流量的迁移方法及装置
CN112003748B (zh) * 2020-08-21 2023-01-13 中国建设银行股份有限公司 适用于虚拟网关的故障处理方法、系统、装置和存储介质

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