CN110740197A - core network equipment, core network system and communication method - Google Patents

core network equipment, core network system and communication method Download PDF

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Publication number
CN110740197A
CN110740197A CN201810804336.1A CN201810804336A CN110740197A CN 110740197 A CN110740197 A CN 110740197A CN 201810804336 A CN201810804336 A CN 201810804336A CN 110740197 A CN110740197 A CN 110740197A
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core network
service
single board
interface message
node
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CN201810804336.1A
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CN110740197B (en
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陈秋玲
张晓奎
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/163—In-band adaptation of TCP data exchange; In-band control procedures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]

Abstract

The invention discloses core network devices, a core network system and a communication method, wherein the core network devices comprise a single board based on an advanced telecom computing platform (ATCA) and a service node supporting an open source server architecture (TARS), the single board sends a Transmission Control Protocol (TCP) interface message to the service node, the service node converts the TCP interface message into the service interface message, determines a target core network device corresponding to the service interface message according to configuration information, and the service node sends the service interface message to the target core network device, so that the service of a communication interface between network elements of a core network is realized, and the flexibility of the core network architecture is improved.

Description

core network equipment, core network system and communication method
Technical Field
The invention relates to the technical field of communication, in particular to types of core network equipment, a core network system and a communication method.
Background
In recent years, with the development of communication technology, the development of core network architecture is changing rapidly.
Typically, the core network architecture is constructed based on the Advanced Telecom Computing Architecture (ATCA). The 4G core network architecture is taken as an example for explanation: at present, in a 4G core network architecture formed by using an ATCA hardware platform, interfaces between network elements need to be defined and configured in advance, and the defined interfaces can only be used between two specific types of network elements.
For example, when a Mobility Management Entity (MME) communicates with a base station, a Transmission Control Protocol (TCP) Protocol is used for the communication, the MME can send a TCP interface message to the base station, interfaces are needed to establish a link between the MME and the base station, and service data is transmitted through the link, where the link is established and cannot be modified, that is, the link is a permanent physical link, and a network cannot be flexibly adjusted, so that a serviced interface process is implemented.
Disclosure of Invention
The invention aims to provide core network devices, a core network system and a communication method so as to realize a service core network architecture and improve the flexibility of the core network architecture.
The purpose of the invention is realized by the following technical scheme:
, the invention provides kinds of core network devices, including:
the system comprises a single board based on an advanced telecom computing platform ATCA and a service node supporting an open source server architecture TARS; the single board is used for realizing the function of the core network equipment;
the single board sends a Transmission Control Protocol (TCP) interface message to the serving node;
the service node converts the TCP interface message into a service interface message and determines target core network equipment corresponding to the service interface message according to configuration information;
the configuration information includes a corresponding relationship between the service interface message and the identification information of the core network device.
And the service node sends the service interface message to the target core network equipment.
Optionally, the sending, by the board, a TCP interface message to the serving node includes:
the single board determines the IP address of the service node according to the Internet protocol IP address of the single board;
the IP address of the single board is determined based on the frame slot position of the single board, the IP address of the service node is determined based on the frame slot position of the service node, and the frame slot position of the single board and the frame slot position of the service node have a corresponding relation;
and the single board sends the TCP interface message to the service node according to the IP address of the service node.
Optionally, the TCP message carries an IP address of the board, an IP address of the serving node, and a port number, where the port number is a port number of a process in the core network device interacting with the serving node.
Optionally, the single board is connected to the service node through a twisted pair ethernet.
In a second aspect, the present invention provides communication methods, applied to a core network device, including:
the single board sends a Transmission Control Protocol (TCP) interface message to the serving node;
the service node converts the TCP interface message into a service interface message;
the service node determines a target single board corresponding to the service interface message according to the configuration information and sends the service interface message to the target single board;
the configuration information includes a corresponding relationship between the service interface message and the identification information of the core network device.
Optionally, the sending, by the board, a TCP interface message to the serving node includes:
the single board determines the IP address of the service node according to the Internet protocol IP address of the single board;
the IP address of the single board is determined based on the frame slot position of the single board, the IP address of the service node is determined based on the frame slot position of the service node, and the frame slot position of the single board and the frame slot position of the service node have a corresponding relation;
and the single board sends the TCP interface message to the service node according to the IP address of the service node.
Optionally, the TCP message carries an IP address of the board, an IP address of the serving node, and a port number, where the port number is a port number of a process interacting with the serving node.
Optionally, the single board is connected to the service node through a twisted pair ethernet.
In a third aspect, the present invention provides kinds of core network systems, including:
th core network device, second core network device;
the core network equipment comprises a single board based on an advanced telecom computing platform (ATCA) and a service node supporting an open source server architecture (TARS), and the second core network equipment comprises a second single board based on the ATCA and a second service node supporting the TARS, wherein the single board is used for realizing the function of the core network equipment;
the th servitization node receives a Transmission Control Protocol (TCP) interface message sent by the th single board;
the th service node converts the TCP interface message into a service interface message for communicating with a second core network device, and sends the service interface message to a second board of the second core network device;
and the second single board sends the service interface message to the second service node.
The invention provides core network devices, a core network system and a communication method, wherein the core network devices comprise a single board of an advanced telecommunication computing platform ATCA for realizing the functions of the core network devices and a service node supporting an vacation open source server architecture TARS, the single board sends a transmission control protocol TCP interface message to the service node, the service node converts the TCP interface message into the service interface message and determines a target core network device corresponding to the service interface message, the service node sends the service interface message to the target core network device, and the single board on the ATCA and the service node in the TARS are linked by utilizing the ATCA hardware platform and the TARS for realizing the functions of the core network devices, thereby realizing the services of the core network architecture and improving the flexibility of the core network architecture.
Drawings
Fig. 1 is a single board schematic diagram of ATCA hardware platforms according to an embodiment of the present application;
fig. 2 is a schematic board diagram of another ATCA hardware platforms according to an embodiment of the present application;
fig. 3 is a schematic core network deployment diagram of ATCA hardware platforms according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of types of TARS frameworks provided in the embodiment of the present application;
fig. 5 is a schematic diagram of types of core network devices according to an embodiment of the present application;
fig. 6 is a flowchart of kinds of devices implementing a core network according to an embodiment of the present application;
fig. 7 is a schematic diagram of kinds of ATCA-based board bus connections according to an embodiment of the present application;
fig. 8 is a schematic link connection diagram of types of TARS virtual machines according to an embodiment of the present application;
fig. 9 is a schematic diagram of an implementation manner of AMFs based on ATCA and TARS architectures according to an embodiment of the present application;
fig. 10 is a schematic diagram of communications between boards and a service node according to an embodiment of the present application;
fig. 11 is a flowchart of communication methods provided by an embodiment of the present application;
fig. 12 is a schematic diagram of kinds of core network systems provided by an embodiment of the present application;
fig. 13 is a schematic diagram of types of served core network architectures according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of the present invention , and not all embodiments.
At present, core networks of the third Generation mobile communication technology (3rd-Generation, 3G) and the fourth Generation mobile communication technology (4G) are all built based on an ATCA hardware platform, and in the international mobile telecommunications standards organization third Generation partnership project (3 GPP) professional conference, a Service-based network architecture (SBA) is adopted as a basic architecture for a 5th-Generation (5G) core network, but no specific software platform realizes the Service of the 5G core network.
The ATCA hardware platform is mainly composed of single boards, single frames are provided with 14 groups of boards ( groups of boards comprise a front panel and a rear panel, some boards are not provided with a rear panel as required), backplanes are arranged between the front panel and the rear panel, and the backplanes are provided with two main system buses, namely a Base bus and a Fabric bus, which are responsible for management information communication, signaling communication and data communication of all the boards in the frames.
Specifically, the Base bus is a management control plane bus of the system. Each switch board slot is internally provided with 24 Base bus interfaces, 12 of the 24 Base bus interfaces are respectively connected to the node slot, 2 of the 24 Base bus interfaces are connected to the main and standby global boards, 1 of the 24 Base bus interfaces is used for intercommunication between the main and standby switch boards, 4 of the 24 Base bus interfaces are externally provided through the rear plug board of the switch board, and 5 interface systems are reserved, and the reference is made to fig. 1.
The Fabric bus is a data channel that provides a system service plane. Each switch board slot is internally provided with 24 Fabric bus interfaces, 12 of which are respectively connected to the node slot, 1 of which is used for the intercommunication between the main switch board and the standby switch board, 8 of which are externally provided through the rear plug board of the switch board, and 3 of which are reserved, and refer to fig. 2.
The deployment environment of the core network system of single boxes based on the ATCA hardware platform can be seen from fig. 3.
When two network elements need to communicate, a link needs to be established through the interface to perform service transmission, under the ATCA architecture, a protocol used for communication is a TCP protocol, and a link for performing service transmission is established, so that exists directly, the flexibility of the core network is poor, and the core network architecture cannot be serviced.
In view of this, the present application provides core network devices, core network systems, and communication methods, and an ATCA hardware platform and an Open source server Architecture (TARS) are used to implement the core network Architecture servitization.
It should be noted that, the embodiments of the present application are mainly applicable to a 5G core network, and the TARS framework may be an Tencent Source Server framework.
The architectural topology of the TARS framework can be seen in fig. 4, which includes a service node and a common framework node.
The service nodes may be specific operating system instances actually run by the service, which may be physical hosts, virtual hosts, or cloud hosts, with the type extension and scale expansion of the service, the service nodes may be thousands or even hundreds of thousands, each service Node has Node service nodes and N (N > -0) service nodes, and the Node service nodes perform system management on the service nodes, provide functions of starting and stopping, issuing, monitoring, and the like, and receive heartbeats reported by the service nodes.
The number of the common frame nodes is not fixed, generally requires deployment on a plurality of servers of a plurality of computer rooms for fault tolerance and disaster tolerance of the common frame nodes, and the specific number of the nodes is related to the scale of the service nodes, for example, if some services need to make more logs, more log service nodes need to be deployed.
The common framework node in the TARS architecture may specifically include: web management system, Registry (routing + management service), Patch (distribution management), Config (configuration center), Log (remote Log), Stat (call statistics), Property (service attribute), Notify (exception information), and the like.
In principle, network interworking between all nodes is required, and at least the node of each machine can communicate with the common framework node.
When the TARS framework is used for service transmission, a tass protocol is used, the protocol is realized by using an Interface Description Language (IDL), and the Interface Description Language (IDL) is binary, extensible, code automatic generation and multi-platform supporting protocols, so that objects running on different platforms and programs written by different languages can communicate with each other in a programmed suspension Control (PRC) remote calling mode, and the TARS framework is mainly applied to a network transmission protocol between background services, serialization and deserialization of the objects and the like.
Fig. 5 shows types of core network devices 100 provided in this embodiment of the present application, which specifically include a board 101 of an ATCA and a serving node 102.
The ATCA single board is used for realizing the function of core network equipment, and the service node is used for supporting a TARS framework.
, the following steps may be taken to achieve communication, as shown in FIG. 6:
s101: the single board sends the TCP interface message to the service node.
S102: the servitizing node converts the TCP message into a servitizing interface message.
S103: and the service node determines the target core network equipment corresponding to the service interface message according to the configuration information.
The configuration information includes a corresponding relationship between the service interface message and the identification information of the core network device.
S104: and sending the service interface message to the target core network equipment.
The steps involved will be described in detail below.
In the embodiment of the present application, a core network architecture that utilizes ATCA and TARS virtual machines to implement services is used, so a description is first given of network deployment of ATCA and TARS in the prior art:
specifically, as shown in fig. 7, deployment manners of a single board under an ATCA architecture provided in the embodiment of the present application are provided, where the global version, the signaling board, the service board, and the interface board are all connected to a base network, a fabric network, and an Operation Administration and Maintenance (OAM) network, and the interface board is used as an interface for generating non-serviced signaling and is connected to the non-serviced signaling network, and the interface board generates the non-serviced signaling and transmits the non-serviced signaling to the non-serviced signaling network.
Fig. 8 shows link deployment modes of types of tass virtual machines provided in this embodiment, where a service server node (sigmsggvbserver), a service node (sigmsgcommenser), and a master node (HttpApiServer) are all connected to a base, a fabric, and an OAM network.
The core network architecture for implementing the servization by using the ATCA and TARS virtual machines provided in the embodiment of the present application includes a plurality of core network devices, and core network devices are taken as an example below to describe in detail a communication process between the board and the servization node.
Fig. 9 is a schematic diagram of core network devices provided in this embodiment, where communication between boards on an access and mobility management entity (AMF) is implemented in a bus connection manner of an ATCA hardware platform, that is, in a connection manner shown in fig. 7, in fig. 9, global boards, two signaling boards, and interface boards are required for implementing functions of the AMF, for example, the global boards and the signaling boards need to communicate with other core network devices through a servization signaling, in this embodiment, servization nodes are respectively configured for the global boards and the signaling boards, in order to distinguish the servization nodes configured for the global boards and the servization nodes configured for the signaling boards, in fig. 9, the servization nodes configured for the global boards are referred to as sigmsggservers, the servization nodes configured for the signaling boards are referred to as hsigmecommememesner.
It can be understood that sigmsglbserver can be used as a service node connected to a global board, and sigmscommenserver can be used as a service node connected to other boards (signaling board, service board, interface board).
In fig. 9, Stream Control Transmission Protocol (SCTP) indicates that a link between a base station and a core network access device AMF transmits data by an SCTP Protocol, and eNB indicates the base station.
Data processing can be performed between the single board and the Tars service node based on a User Datagram Protocol (UDP), and communication can be performed between the service node and the main control node by using a standard high-performance Remote Procedure Call (RPC) framework.
The service interface message may be a hypertext Transfer Protocol (HTTP) message, and may be sent in the form of a JavaScript Object Notation (JSON) string.
Interface board a is an interface for generating non-service signaling, and if core network devices do not need to communicate with other network devices through the non-service interface, interface board a may not be configured in the core network devices.
For example, if the AMF shown in fig. 9 requires 3 boards, then the AMF is configured with a http api master node, a sigmsglbserver, and two sigmsgcommenserservers.
Specifically, the service node may determine the target core network device corresponding to the service interface message according to the configuration information.
The configuration information may include a correspondence between the service interface message and the identification information of the core network device.
, in one possible embodiment, the board sends the TCP message to the service node in the following manner:
the single board determines an Internet Protocol (IP) address of the serving node according to the IP address of the single board, and sends the TCP message to the serving node through the IP address of the serving node.
It is understood that the single board communicates with the servicing node via an IP address.
The IP address of the single board can be determined by the position of the frame slot where the single board is located, the IP address of the service node can be determined by the position of the frame slot of the service node, and the position of the frame slot where the single board is located and the position of the frame slot of the service node have a corresponding relation.
It should be noted that the position of the frame slot is understood as the frame number of the frame slot.
It will be appreciated that the frame slots are under the ATCA architecture, including subracks, card slots, and that there may be differences for different vendors, for example, the frame slots used by dating are frames with three subracks and subracks with 14 slots.
In the practical application process, the frame number and the frame slot number of the frame slot are both configured in advance, for example, if the frame number of the frame slot of the Amf signaling board is 1 and the frame slot number is 3, the frame number of the frame slot of the service node may be the frame number plus 2, and the frame slot number is not changed, that is, the frame number of the frame slot of the service node is 3 and the frame slot number is 3.
The relationship between the frame number of the frame slot of the service node and the frame number of the frame slot of the single board is not limited to plus 2, and the above description is only illustrative of types, and the embodiment of the present application does not limit this.
Optionally, the TCP message carries an IP address of the board, an IP address of the serving node, and a port number.
The port number is a port number of a process interacting with the service node in the core network device.
Fig. 10 shows a communication process between types of Tars virtual machines and a board according to the embodiment of the present application, specifically taking an Amf signaling board and a service node as an example, as shown in fig. 10.
The communication process of communication between the service node and the Amf signaling board can be specifically divided into:
amf signaling board → serving node: and calculating the IP address of the service node in the Tars virtual machine through the frame slot of the signaling board.
It is understood that the IP address is an IP address calculated based on the shelf slot under the ATCA architecture, i.e., a baseip address.
Serving node → Amf signaling board: and acquiring the port number of a process for interacting the service node and the single board and the IP address of the service node.
Specifically, the service node interacts with the msps process of the board in the Amf network element.
It should be understood that the processes with which the servitizing node interacts in different network elements are different, and that which process the servitizing node interacts with is preconfigured.
For example, for a servitization node in the Amf, the msps process is:
root 4762 1 0 11:59？00:01:39./msps.exe cpsstag 102410c32000000102410c3 21001 21001fa04d1
the port number of the msps process is a 12-bit value of the parameter after the cpsstag of the process information column, and f are supplemented in front, namely 0xf 102.
The servitization node may read the base ip address of the signaling board and the port number of the corresponding process in a configuration file (DTApp _ sba.cfg).
Further , the single board and the service node may be connected via a twisted pair ethernet (base network).
The present application further provides communication methods, which can be applied to the above core network device.
Fig. 11 shows communication methods provided in this embodiment of the present application, where an execution subject of the method shown in fig. 11 may be communication devices, for example, the method may be the core network device mentioned above, and referring to fig. 11, the method includes:
s201: the single board sends a TCP interface message to the serving node.
S202: the servitizing node converts the TCP interface message to a servitizing interface message.
S203: and the service node determines the target single board according to the configuration information.
Specifically, the service node may determine the target board corresponding to the service interface message according to the configuration information.
The configuration information may include a corresponding relationship between the service interface message and the identification information of the board.
S204: and the service node sends the service interface message to the target single board.
Further , the board sends the TCP interface message to the service node in the following manner:
and determining the IP address of the service node according to the IP address of the single board, and then sending the TCP interface message to the service node according to the IP address of the service node.
The IP address of the single board can be determined based on the frame slot position of the single board, the IP address of the service node can also be determined according to the frame slot position, and the frame slot position of the single board and the frame slot position of the service node have a preset corresponding relationship.
It is understood that the position of the frame slot may be preset, and secondly, the relationship between the frame slot position of the single board and the frame slot position of the service node is not particularly limited.
Optionally, the TCP message may carry an IP address of the board, an IP address of the serving node, and a port number.
Wherein, the port number is the port number of the process interacting with the service node.
Further , the board is connected to the servitization node through a twisted pair ethernet, that is, the board communicates with the servitization node through the twisted pair ethernet (base network).
Referring to fig. 12, an -type core network system 200 according to an embodiment of the present application is shown in fig. 12, and the system includes a -type core network device 201 and a second core network device 202.
The th core network device comprises a th single board of an advanced telecom computing platform (ATCA) for realizing the th core network device function and a th service node supporting TARS.
The second core network device comprises a second single board of an advanced telecom computing platform (ATCA) for realizing the functions of the second core network device, and a second service node supporting the TARS.
Specifically, in the th core network device, the th board sends a TCP interface message to the th servization node, the th servization node converts the TCP message into a servization interface message after receiving the TCP interface message, determines a second core network device in communication with the servization interface message, and sends the servization interface message to the second core network device.
In the second core network device, after receiving the service interface message, the second board sends the service interface message to the second service node.
Fig. 13 is a schematic diagram of core network architectures according to an embodiment of the present invention, and referring to fig. 13, a process involved in the above system is described.
The th core Network device may be understood as the AMF in fig. 13, and when the http server master node in the AMF receives the service interface message (http message), the http server master node sends the message to a Network Function library Function (NRF) in the form of json character string, and since the NRF has a Management Function, the NRF may schedule the core Network device for the service interface message, i.e., to which core Network device the service interface message is sent, and assuming that the service interface message is to be sent to a Session Management Function (SMF), the SMF may be understood as the second core Network device.
In fig. 13, a Radio Access Network (RAN) is connected to an interface board in the AMF, a signaling board of the SMF is connected to a signaling board of a User Plane Function (UPF), and an NRF, a Policy Control Function (PCF), and a User Data Management (UDM) are further connected to the service interface bus.
It should be understood that in the foregoing description, words such as "", "second", etc. have been used for descriptive purposes only and not for purposes of indicating or implying relative importance, nor order, thereof.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

  1. The core network device of kinds, characterized by comprising:
    the system comprises a single board based on an advanced telecom computing platform ATCA and a service node supporting an open source server architecture TARS; the single board is used for realizing the function of the core network equipment;
    the single board sends a Transmission Control Protocol (TCP) interface message to the serving node;
    the service node converts the TCP interface message into a service interface message and determines target core network equipment corresponding to the service interface message according to configuration information;
    the configuration information comprises a corresponding relation between the service interface information and the identification information of the core network equipment;
    and the service node sends the service interface message to the target core network equipment.
  2. 2. The apparatus of claim 1, wherein the board sending a TCP interface message to the servization node comprises:
    the single board determines the IP address of the service node according to the Internet protocol IP address of the single board;
    the IP address of the single board is determined based on the frame slot position of the single board, the IP address of the service node is determined based on the frame slot position of the service node, and the frame slot position of the single board and the frame slot position of the service node have a corresponding relation;
    and the single board sends the TCP interface message to the service node according to the IP address of the service node.
  3. 3. The apparatus according to claim 2, wherein the TCP message carries an IP address of the board, an IP address of the serving node, and a port number, and the port number is a port number of a process interacting with the serving node in the core network apparatus.
  4. 4. The apparatus according to any , wherein the single board is coupled to the servitization node via a twisted pair ethernet network.
  5. The communication method of , applied to a core network device, includes:
    the single board sends a Transmission Control Protocol (TCP) interface message to the serving node;
    the service node converts the TCP interface message into a service interface message;
    the service node determines a target single board corresponding to the service interface message according to the configuration information and sends the service interface message to the target single board;
    the configuration information includes a corresponding relationship between the service interface message and the identification information of the board.
  6. 6. The method of claim 5, wherein said board sending a TCP interface message to said servitizing node comprises:
    the single board determines the IP address of the service node according to the Internet protocol IP address of the single board;
    the IP address of the single board is determined based on the frame slot position of the single board, the IP address of the service node is determined based on the frame slot position of the service node, and the frame slot position of the single board and the frame slot position of the service node have a corresponding relation;
    and the single board sends the TCP interface message to the service node according to the IP address of the service node.
  7. 7. The method according to claim 6, wherein the TCP message carries an IP address of the board, an IP address of the serving node, and a port number, and the port number is a port number of a process interacting with the serving node.
  8. 8. The method according to any of claims 5-7, wherein the single board is connected to the servitizer node via twisted pair ethernet.
  9. The core network system of , characterized by that, include:
    th core network device, second core network device;
    the core network equipment comprises a single board based on advanced telecom computing platform ATCA and a service node supporting TARS, and the second core network equipment comprises a second single board based on advanced telecom computing platform ATCA and a second service node supporting TARS, wherein the single board is used for realizing the function of core network equipment, and the second single board is used for realizing the function of the core network equipment;
    the th servitization node receives a Transmission Control Protocol (TCP) interface message sent by the th single board;
    the th service node converts the TCP interface message into a service interface message for communicating with a second core network device, and sends the service interface message to a second board of the second core network device;
    and the second single board sends the service interface message to the second service node.
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