WO2017162071A1

WO2017162071A1 - Network node, method and device for communicating between network nodes, and storage medium

Info

Publication number: WO2017162071A1
Application number: PCT/CN2017/076672
Authority: WO
Inventors: 郑芳庭; 陈力; 罗伟; 李宁
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-03-21
Filing date: 2017-03-14
Publication date: 2017-09-28
Also published as: CN107222450A

Abstract

Disclosed are a network node and a method for communicating between network nodes. The network node in the present application is split into an application node configured to complete application-related processing, and a session and transmission node configured to complete processing of sessions and transmission necessary for communication. The application node is configured to perform presentation layer and/or application layer encapsulation on a message to be sent and then deliver the message to be sent to the session and transmission node. The session and transmission node is configured to determine a transmission link according to a target network node and a transmission type, perform session layer and/or transmission layer and/or network layer and/or data link layer encapsulation on presentation layer and/or application layer payload from the application node by means of the determined transmission link, and then send the presentation layer and/or application layer payload to the target network node. Also disclosed are a device for communicating between network nodes and a storage medium.

Description

Network node and method, device and storage medium for realizing communication between network nodes

Technical field

The present invention relates to, but is not limited to, a network communication technology, and more particularly to a network node and a method, device and storage medium for implementing communication between network nodes.

Background technique

The current communication mode between network nodes basically follows the seven-layer model of Open System Interconnection (OSI). The seven-layer model includes: physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer. . That is to say, the interface communication implemented by each traditional network node includes all layers from the physical layer to the application layer (in some cases, there is no complete seven layers), and point-to-point communication is often used between network nodes. .

This kind of point-to-point communication between existing network nodes causes the following problem: since the link between each two network nodes needs to be negotiated by two nodes, if the network node is dynamically added or decreased in the network The link between network nodes will also increase or decrease, so the network topology is complex and the network topology is difficult to change. On the other hand, even if the network path is open, the communication between two network nodes without direct links is only It can transmit relays through some network nodes with links to them, and cannot dynamically add links between two network nodes. This makes the network path lengthen and the network topology rigid. Moreover, the network nodes need Pre-negotiating some parameters for establishing connections, including transport layer parameters, session layer parameters, and even application layer parameters, complicates communication between network nodes.

Summary of the invention

In view of this, embodiments of the present invention are directed to providing a network node and a method, apparatus, and storage medium for implementing communication between network nodes, which can reduce problems caused by the point-to-point communication mode.

In order to achieve the objectives of the present invention, the present invention provides a network node, including a configuration to complete An application node that applies related processing, and a session transfer node configured to complete the processing of the necessary sessions and transmissions for communication;

The application node is configured to deliver the message to be sent to the session transfer node after being encapsulated by the presentation layer and/or the application layer;

a session transfer node configured to determine a session relationship and a transmission link according to information and a transmission type of the target network node, and to perform a presentation layer and/or an application layer payload from the application node through the determined transmission link, including a session layer, and / or the transport layer, and / or network layer, and / or data link layer is encapsulated and sent to the target network node.

In an embodiment, different application nodes belonging to the same data center share the same session transfer node or use different session transfer nodes.

In an embodiment, the session transfer node includes: a session node configured to complete session processing necessary for communication, and a transfer node configured to perform transmission processing necessary for communication;

a session node, configured to determine a corresponding transport node according to information and a transmission type of the target network node; deliver the presentation layer and/or application layer payload from the application node to the selected transport node and specify a target network node Or other identifiers used by the transport node to select the link;

a transport node configured to determine a transport link based on a target network node or other identifier for the transport node to select the link, and to perform the payload obtained by the determined transport link including the transport layer, and/or the network layer, and/or Or the data link layer is encapsulated and sent to the target network node.

In an embodiment, the session node is further configured to: perform session layer encapsulation on the presentation layer and/or application layer payload, and then deliver the selected layer to the selected transit node.

In an embodiment, the transmission node is divided into one or more transmission nodes according to different transmission types;

The same session node invokes a plurality of transmission nodes of different transmission types to transmit corresponding types Message.

In an embodiment, the information and transmission type of the target network node are specified by the application node; or

The session transfer node or the session node is further configured to determine information and a transmission type of the target network node by a local configuration policy or a third party.

In an embodiment, the session transmission node or the session node determines that the transmission link comprises:

Determining whether a transmission link has been established according to the information and transmission type of the target network node. If not established, the transmission link is newly established as a transmission path. If it is established, the established transmission link is selected as the transmission path. .

In an embodiment, the application node and the session transfer node are two independent entities, or different modules disposed in the same entity.

In an embodiment, the application node, the session node, and the transit node are three independent entities, or different modules disposed in the same entity.

In an embodiment, the session node and the transit node are two independent entities, or different modules disposed in the same entity.

The present invention also provides an apparatus for implementing communication between network nodes, including a first processing module, a first interface module, wherein

a first processing module, configured to perform a presentation layer and/or an application layer encapsulation on the message that needs to be sent;

The first interface module is configured to deliver the encapsulated presentation layer and/or application layer payload to the session transfer node.

In an embodiment, the device is disposed in a network node or is a separate entity.

The present invention further provides an apparatus for implementing communication between network nodes, including a second processing module and a second interface module;

a second processing module configured to receive a presentation layer and/or an application layer payload from the application node Loading; determining the transmission link according to the target network node and the transmission type;

a second interface module configured to include the presentation layer and/or the application layer payload obtained by the determined transmission link, including a session layer, and/or a transport layer, and/or a network layer, and/or a data link layer encapsulation Then send it to the target network node.

The second processing module is further configured to: determine, by a local configuration policy or a third party, information and a transmission type of the target network node.

In an embodiment, the determining, by the second processing module, the transmission link includes:

In an embodiment, the device is disposed in a network node; or is a separate entity.

The present invention further provides an apparatus for implementing communication between network nodes, including a third processing module and a third interface module;

a third processing module, configured to receive a presentation layer and/or an application layer payload from the application node; and determine a corresponding transmission node according to the target network node and the transmission type;

And a third interface module configured to deliver the presentation layer and/or application layer payload from the application node to the selected transport node and specify a target network node or other identifier for the transport node selection link.

In an embodiment, the third interface module is further configured to: perform session layer encapsulation on the presentation layer and/or application layer payload, and then deliver the selected layer to the selected transit node.

The third processing module is further configured to: determine the target by a local configuration policy or a third party The information and transmission type of the standard network node.

In an embodiment, the third processing module determines that the transmission link includes:

In an embodiment, the device is disposed in a network node; or is disposed in a session transfer node; or is a separate entity.

The present invention also provides an apparatus for implementing communication between network nodes, including a fourth processing module and a fourth interface module;

a fourth processing module configured to receive a session layer and/or a presentation layer and/or an application layer payload from the session node; determine a transmission link according to a target network node from the session node or other identifier for the transmission node to select the link ;

a fourth interface module, configured to send the obtained session layer and/or presentation layer and/or application layer payload to the transport layer, and/or the network layer, and/or the data link layer by using the determined transmission link Go to the target network node.

The present invention further provides a method for implementing communication between network nodes. The network node is split into an application node configured to complete application-related processing, and a session transfer node configured to perform processing necessary for communication and transmission of communication;

The application node completes the presentation layer and/or application layer encapsulation of the message to be sent, and delivers the encapsulated presentation layer and/or application layer payload to the session transfer node;

The session transfer node determines the transmission link according to the information and the transmission type of the target network node, and performs the presentation layer and/or application layer payload obtained through the determined transmission link, including the session layer, and/or the transport layer, and/or The network layer, and/or the data link layer is encapsulated and sent to the destination network segment. point.

In an embodiment, the session transfer node is split into a session node configured to complete session processing necessary for communication, and a transfer node configured to perform transmission processing necessary for communication;

The session node determines a corresponding transport node according to the target network node and the transmission type; delivers the presentation layer and/or application layer payload from the application node to the selected transport node and specifies the target network node or other for transport node selection The identity of the link;

The transmitting node determines the transmission link according to the target network node or other identifier for the transmission node selection link, and performs the presentation layer and/or application layer payload obtained through the determined transmission link, including the transport layer, and/or the network. The layer, and/or data link layer is encapsulated and sent to the target network node.

In an embodiment, the method further includes: the session node performing session layer encapsulation on the presentation layer and/or application layer payload, and then delivering the result to the selected transit node.

The same session node invokes a plurality of transmission nodes of different transmission types to send a message of a corresponding type.

The method also includes the session transmission node or the session node determining information and transmission type of the target network node by a local configuration policy or a third party.

Finding whether a transmission has been established according to the information and transmission type of the target network node The link, if not established, newly establishes a transmission link as a transmission path, and if so, selects an established transmission link as a transmission path.

The embodiment of the present invention further provides a computer storage medium storing a computer program configured to perform the above-described method for implementing communication between network nodes according to an embodiment of the present invention.

Compared with the prior art, the network node of the present application is split into an application node configured to complete application-related processing, and a session transfer node configured to complete processing of communication and transmission necessary for communication; wherein, the application node is configured to The message to be sent is encapsulated by the presentation layer and/or the application layer and delivered to the session transfer node; the session transfer node is configured to determine the session relationship and the transmission link according to the target network node and the transmission type, and the determined transmission link The presentation layer and/or application layer payload from the application node is encapsulated and included in the session layer, and/or transport layer, and/or network layer, and/or data link layer, and transmitted to the target network node. In the present invention, since the network node is split into the application node and the session transmission node, the interface communication implemented by one node does not need to be implemented from the physical layer to the application layer, and therefore, the network topology change becomes simple and flexible; The communication process between network nodes.

In an embodiment, the session transfer node can also be split into a session node and a transit node, which further simplifies the protocol that a node needs to implement interface communication, thereby making the network topology change simpler and more flexible; and further simplifying The process of communication between network nodes.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

DRAWINGS

The drawings described herein are provided to provide a further understanding of the invention, and are intended to be a Improper limitations of the Ming. In the drawing:

1 is a schematic structural diagram 1 of a network node of an application layer separated from a session transport layer according to an embodiment of the present invention;

2 is a flowchart of a method for implementing communication between network nodes shown in FIG. 1 according to an embodiment of the present invention;

3 is a schematic flowchart of implementing communication based on the architecture shown in FIG. 1 according to an embodiment of the present invention;

4 is a schematic structural diagram 2 of a network node separated from an application layer and a session transport layer according to an embodiment of the present invention;

FIG. 5( a ) is a schematic flowchart 1 of implementing communication according to the architecture shown in FIG. 4 according to an embodiment of the present invention;

FIG. 5(b) is a second schematic diagram of a process for implementing communication based on the architecture shown in FIG. 4 according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram 3 of a network node of an application layer separated from a session transport layer in an embodiment of the present invention; FIG.

FIG. 7 is a flowchart of a method for implementing communication between network nodes shown in FIG. 6 according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic flowchart of implementing communication according to the architecture shown in FIG. 6 according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram 1 of a device for implementing communication between network nodes according to an embodiment of the present invention; FIG.

10 is a schematic structural diagram 2 of a device for implementing communication between network nodes according to an embodiment of the present invention;

11 is a schematic structural diagram 3 of a device for implementing communication between network nodes according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram 4 of a device for implementing communication between network nodes according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The network node of the present invention is split into an application node including an application configured to perform application related processing, and a session transfer node configured to perform processing necessary for communication and transmission. among them,

An application node, configured to perform a presentation layer and/or an application layer encapsulation of the message to be sent, and then deliver the presentation layer and/or the application layer payload to the session transmission node;

The session transfer node is configured to determine a session relationship and a transmission link according to information and a transmission type of the target network node, and perform a mapping of the presentation layer and/or the application layer payload from the application node through the determined transmission link to perform network node communication. That is, after encapsulation including the session layer, and/or the transport layer, and/or the network layer, and/or the data link layer, the encapsulated message is sent to the target network node.

The different application nodes belonging to the same data center may share the same session transmission node, or may use different session transmission nodes.

The message obtained after the presentation layer and/or the application layer is encapsulated is a presentation layer and/or an application layer payload.

The interface between the application node and the session transfer node may be a customized interface, such as a payload plus a pure IP transmission, or other tunnel or non-IP interface mode.

In an embodiment, the session transfer node may also be split into session nodes configured to perform the necessary session processing for communication, and transport nodes configured to perform the transfer processing necessary for communication. among them,

a session node, configured to determine a session relationship according to information and a transmission type of the target network node and determine a corresponding transmission node; deliver a presentation layer and/or an application layer payload from the application node to the selected transmission node and specify a target network node Or other identifier used by the transport node to select a link. In an embodiment, the session node is further configured to send the message to be transmitted from the application node to the selected transport node by including the encapsulation of the session layer (ie, the session layer information required for communication), and then deliver the message to the transport node. The message of the node is the session layer and the presentation layer and/or the application layer payload. That is, the message that the session node delivers to the transit node can be the session layer and / Or represent the layer and / or application layer payload.

a transport node configured to determine a transport link based on a target network node or other identifier for the transport node selection link, and to obtain the session layer and/or presentation layer and/or application layer payload through the determined transport link The network node communication must include a transport layer, and/or a network layer, and/or a data link layer, and the encapsulated packet is sent to the target network node.

The interface between the session node and the transit node may be a customized interface, such as a payload plus a pure IP transmission, or other tunnel or non-IP interface mode.

Wherein, the information and transmission type of the target network node are specified by the application node; or,

The session transfer node or session node is also configured to determine the information and transmission type of the target network node through a local configuration policy or a third party.

The transmission node may be divided into multiple transmission nodes according to different transmission types, and the same session node may invoke multiple transmission nodes of different transmission types.

It should be noted that the application node and the session transfer node may be two independent entities, or may be different modules set in the same entity.

It should be noted that the application node, the session node, and the transit node may be three independent entities, or may be different functional modules disposed in the same entity. The session node and the transit node may be two independent entities, or may be different functional modules disposed in the same entity.

Correspondingly, the network node is split into: an application node configured to complete application-related processing, and a session transfer node configured to perform processing necessary for communication and transmission; the method for implementing communication between network nodes of the present invention includes:

The session transfer node determines the session relationship and the transmission link according to the information and the transmission type of the target network node, and performs the presentation layer and/or the application layer payload obtained through the determined transmission link. The network node communication must include encapsulation such as session layer, and/or transport layer, and/or network layer, and/or data link layer, and send the encapsulated message to the target network node.

The different application nodes belonging to the same data center share the same session transmission node, and different session transmission nodes may also be used.

The session transfer node may be further split into: a session node configured to complete session processing necessary for communication, and a transfer node configured to perform necessary transmission processing for communication;

The processing performed by the session transfer node specifically includes:

The session node determines a corresponding transport node according to the target network node and the transmission type; delivers the presentation layer and/or application layer payload from the application node to the selected transport node and specifies the target network node or other transport node selection link Logo. In an embodiment, the method further includes: the session node submits the presentation layer and/or the application layer payload from the application node to the selected transmission node by including the encapsulation of the session layer (ie, the session layer information required for communication). The message delivered to the transmitting node at this time is the session layer and the presentation layer and/or application layer payload. That is, the message that the session node delivers to the transmitting node can be a session layer and/or a presentation layer and/or an application layer payload.

The transmitting node determines the transmission link according to the target network node or other identifier for the transmission node selection link, and performs the payload of the session layer and/or the presentation layer and/or the application layer payload through the determined transmission link. The network node communication must include a transport layer, and/or a network layer, and/or a data link layer, and the encapsulated packet is sent to the target network node.

Wherein, the transmission node is divided into one or more transmission nodes according to different transmission types;

The interface between the application node and the transit node may be a customized interface, such as a payload plus a pure IP transmission, or another tunnel or non-IP interface.

The same session node invokes multiple transmission nodes of different transmission types to send corresponding types of cancellation interest.

In the method of the present invention, the information and transmission type of the target network node are specified by the application node; or the method further includes: the session transmission node or the session node determines the information and transmission type of the target network node by using a local configuration policy or a third party.

In the method of the present invention, the session transmission node or the session node determines that the transmission link includes:

According to the information and the transmission type of the target network node, it is found whether a transmission link has been established. If not, the transmission link is newly established as a transmission path. If it is established, the established transmission link is selected as the transmission path.

FIG. 1 is a schematic structural diagram of a network node of an application layer separated from a session transport layer according to the present invention. As shown in FIG. 1, the network node A of the present invention is split into an application node A and a session transport node A. 2 is a flowchart of an embodiment of a method for implementing communication between network nodes shown in FIG. 1 according to the present invention. Referring to FIG. 1, in this embodiment, it is assumed that the application node A of the present invention needs to be respectively connected to a traditional network node B and a conventional The network node C sends the message B and the message C, and specifically includes:

Step 200: Application node A completes the presentation layer and/or application layer encapsulation of message B and message C, respectively, and the presentation layer and/or application layer payload of the encapsulated message B and the presentation layer and/or application layer of message C. The payload is delivered to the session transfer node A through an interface between the application node A and the session transfer node A.

In this step, the application node A can specify the information of the target network node, that is, the resource name and transmission type of the target network node B and the target network node C, such as Transmission Control Protocol (TCP) or User Datagram Protocol (UDP, User Datagram). Protocol), etc., wherein the target network node resource name may be a Uniform Resource Locator (URL), a protocol (IP, Internet Protoco, or Network Association) address or other identifier. The information of the target network node is encapsulated in a specific interface together with the message B presentation layer and/or the application layer payload and the message C presentation layer and/or the application layer payload, and is transmitted between the application node and the session transmission node.

In this step, the interface that the application node A delivers the message to the session transport node A may be a custom interface in the data center, such as a payload plus a pure IP transmission, or other tunnel or non-IP interface manner.

In the present invention, the application node specifies parameters for use by the session transfer node, such that the session transfer node can dynamically select and create links. In addition, the identifier may be a pre-released parameter such as a domain name, and connection parameters such as an address and a port number need not be negotiated in advance.

Step 201: The session transfer node A correspondingly determines the session relationship and the transmission link to the network node B and the network node C according to the resource name and the transmission type of the target network node.

The session relationship is determined, for example, a session ID of a complete interaction is generated according to the current message and subsequent messages associated with the message, and a session entry is recorded.

If the application node A does not specify the resource name and the transmission type of the target network node in step 200, the step further includes: the session transfer node A may determine the resource name and the transmission type of the target network node by using a local configuration policy or a third party.

Step 202: The session transfer node A performs the session layer and/or the transport layer payload of the obtained message B through the selected transport link, and/or the transport layer (such as TCP or UDP), and/or the network. The layer, and/or the data link layer are encapsulated and sent to the network node B, and the obtained presentation layer and/or application layer payload of the message C is used for the session layer, and/or the transport layer (such as TCP) necessary for network node communication. Or UDP), and/or network layer, and/or data link layer are encapsulated and sent to network node C.

In this step, the session transfer node A may include the session layer, and/or the transport layer, and/or the network layer, and/or the network layer communication required for the obtained message B/message C presentation layer and/or application layer payload. Or the data link layer is encapsulated and sent to the corresponding destination network node.

FIG. 3 is a schematic flowchart of an embodiment of implementing communication between a Mobility Management Entity (MME) and a Home Subscriber Server (HSS) of a 4G mobile core network based on the architecture shown in FIG. In this embodiment, The traditional MME is split into an MME application node and an MME session transmission node. When the MME application node needs to send an authentication information acquisition message to the HSS, the method for implementing communication between the network nodes according to the present invention is as shown in FIG. The following steps:

Step 300: After the MME application node encapsulates the authentication information acquisition message according to the Diameter application protocol, the MME application node delivers the application layer payload to the MME session transmission node through an interface between the MME application node and the MME session transmission node.

In this step, the MME application node can simultaneously specify the information of the target network node, that is, the Diameter host name and the transmission type of the target HSS, such as the Stream Control Transmission Protocol (SCTP).

In this step, the interface that the MME application node delivers the message to the MME session transport node may be a custom interface in the data center, such as a payload plus a pure IP transmission, or other tunnel or non-IP interface manner.

The Diameter protocol is an upgraded version of the Remote Authentication Dial In User Service (RADIUS) protocol. The Diameter protocol is a protocol cluster, including a basic protocol and a Network Attached Server (NAS) protocol. EAP (Extensible authentication protocol) protocol, Mobile IP (MIP, Mobile IP) protocol, Code Message Syntax (CMS) protocol, etc.

Step 301: The MME session transmission node searches whether the transmission link has been established according to the Diameter host name and the transmission type of the target HSS. If not, the newly established transmission link is used as the transmission path. If it is established, the established transmission is selected. The link acts as a transmission path;

Here, the transmission type is SCTP.

If the MME application node does not specify the Diameter host name and the transmission type of the target HSS in step 300, the step further includes: the MME session transmission node may determine the Diameter host name and the transmission type of the target HSS by using a local configuration policy or a third party.

Step 302: The MME session transmission node performs the presentation layer and/or application layer payload of the obtained authentication information acquisition message on the transport layer SCTP, and/or the network layer, and/or the data link through the selected transmission link. After the layer is encapsulated, the encapsulated packet is sent to the target HSS.

4 is a schematic diagram of another composition of a network node in which the application layer and the session transport layer are separated from each other. As shown in FIG. 4, the application node A and the application node C belong to the same data center, such as the data center 1, and therefore, may share the same The session transfer node A performs communication; the network node B in another data center such as the data center 2 may be a conventional network node, or may adopt the network node architecture of the present invention, as shown in FIG. 4, including the application node B and the session transfer node. B.

FIG. 5(a) is a schematic flowchart of an embodiment of the present invention for implementing communication between an MME and a serving gateway (SGW, Serving GW) of a 4G mobile core network based on the architecture shown in FIG. 4, in this embodiment, the MME When the application node and the SGW application node belong to different data centers, when the MME application node needs to send a create session request message to the SGW application node, the method for implementing communication between the network nodes according to the present invention includes the following steps:

Step 500a: After the MME application node encapsulates the create session request message according to the GTP application protocol, the application layer payload is delivered to the MME session transfer node through the interface.

Here, the GTP application protocol is the General Packet Radio Service (GPRS) tunneling protocol.

The MME application node may specify a domain name and a transmission type of the target SGW, such as a User Datagram Protocol (UDP).

In this step, the manner in which the MME application node delivers the message to the MME session transport node may be a pure IP mode or other manner defined by the data center to which it belongs.

Step 501a: The MME session transit node searches for the IP address of the target SGW by using the DNS mode or the local hostfile mode according to the domain name of the target SGW.

If the MME application node does not specify the domain name and the transmission type of the target SGW in step 500a, the step further includes: the MME session transmission node may adopt a local configuration policy or The three parties determine the domain name and transmission type of the target SGW.

Step 502a: After the MME session transmission node creates the session request application layer payload according to the transmission type, such as UDP encapsulation (such as encapsulating UDP and IP headers, etc.), the encapsulated packet is sent to the SGW session transmission node of the target SGW.

Step 503a: The SGW session transmission node of the target SGW delivers the received packet extraction application layer payload to the SGW application node of the target SGW.

FIG. 5(b) is an embodiment of the present invention, based on the architecture shown in FIG. 4, between an SGW of a 4G mobile core network and a Public Data Network (PDN, PDN GateWay) gateway in the same data center. A flow diagram of an embodiment of the communication implementation. In this embodiment, when the SGW application node needs to send a create session request message to the PGW application node, the method for implementing communication between the network nodes according to the present invention specifically includes the following steps:

Step 500b: The SGW application node encapsulates the create session request message according to the GTP application protocol, and delivers the session request node to the session transfer node according to a specific interface.

In this step, the SGW application node may specify the domain name and transmission type of the target PGW, such as UDP.

In this step, the manner in which the SGW application node delivers the application layer payload of the session request message to the session transport node may be a pure IP mode or other manner defined by the data center to which it belongs.

Step 501b: The session transfer node searches for the IP address of the target PGW by using a Domain Name System (DNS) or a local host file according to the domain name of the target PGW, and determines that the data center is an internal application node.

If the SGW application node does not specify the domain name and the transmission type of the target PGW in step 500b, the step further includes: the session transmission node may determine the domain name and the transmission type of the target PGW through a local configuration policy or a third party.

Step 502b: The session transfer node will create a session request application layer payload according to the transport class. After the UDP encapsulation (such as encapsulating UDP and IP headers), the encapsulated packet is sent to the target PGW application node. Optionally, the transport session node may also extract the application layer payload from the create session request message, and deliver the packet to the target PGW application node according to the identifiable encapsulation form in the data center, for example, without encapsulating UDP, using a custom interface, etc. .

FIG. 6 is a schematic structural diagram of another composition of a network node separated from the session transport layer by the application layer. As shown in FIG. 6, the session transport node of the present invention is split into a session node A and a transport node A. The transmission node A can be further split into a plurality of transmission nodes corresponding to different transmission types, such as the transmission node A1 and the transmission node A2 shown in FIG. 6. FIG. 7 is a flowchart of an embodiment of a method for implementing communication between network nodes shown in FIG. 6 . Referring to FIG. 6 , in this embodiment, session node A uniformly manages session relationships on various types of transmissions, and session node A may Call multiple different types of transport nodes. The transit node A in this embodiment is only responsible for transport layer processing, such as TCP link establishment and data transmission, and includes a transport node A1 and a transport node A2 corresponding to different transport types. When the application node A in this embodiment needs to send a message to the traditional network node B and the traditional network node C, the method specifically includes:

Step 700: Application node A completes the presentation layer and/or application layer encapsulation of message B and message C, respectively, and the presentation layer and/or application layer payload of the encapsulated message B and the presentation layer and/or application layer of message C. The payload is delivered to session node A on a specific interface.

In this step, the application node A may specify the resource name and transmission type of the target network node B and the target network node C, such as TCP or UDP, etc., wherein the resource name of the target network node may be a URL, an IP address or other identifier.

In this step, the manner in which the application node A delivers the message payload to the session node A may be a pure IP mode or other manner defined by the data center to which it belongs.

Step 701: The session node A determines the session relationship to the target network node, such as the network node B and the network node C, respectively, according to the resource name of the target network node and the transmission type specified by the application node A. Determining the session relationship may be based on the current message and subsequent cancellation associated with the message. Generate a complete interactive session ID, record session entries, and more. Optionally, session node A may further perform session layer encapsulation necessary for network node communication.

If in step 700. The application node A does not specify the resource name and the transmission type of the target network node. Then, the step further includes: the session node A may determine the resource name and the transmission type of the target network node by using a local configuration policy or a third party.

Step 702: The session node A delivers the session layer and/or the presentation layer and/or the application layer payload of the message B and the session layer and/or the presentation layer and/or the application layer payload of the message C to the transmission according to the specific interface. Node A1 and transport node A2.

In this step, session node A delivers the session layer and/or presentation layer and/or application layer payload of message B and the session layer and/or presentation layer and/or application layer payload of message C to transport node A1 and respectively. The way of transmitting node A2 may be pure IP mode, or other way defined by the data center to which it belongs. In this embodiment, it is assumed that an identifier for the transmission node selection transmission link, such as a target IP address and a destination port number, is also included.

Step 703: The transmitting node A1 or the transmitting node A2 selects an established connection or a newly established transmission link.

Step 704: The transit node A1 performs the obtained session layer and/or the presentation layer and/or the application layer payload of the message B on the transport layer (such as TCP or UDP), and/or the network side through the selected transmission link. And/or the data link layer is encapsulated and sent to the network node B; the transport node A2 performs the transport layer of the obtained message C session layer and/or the presentation layer and/or the application layer payload through the selected transmission link ( The packet is sent to the network node C after being encapsulated, such as TCP or UDP), and/or the network side, and/or the data link layer.

8 is a schematic flowchart of an embodiment of implementing communication between an MME and an HSS of a 4G mobile core network according to the architecture shown in FIG. 6. In this embodiment, a traditional MME is split into an MME application node. MME session node and SCTP transport node. When the MME application node needs to send an update location request message to the HSS, the communication between the network nodes is implemented according to the present invention. The method, as shown in FIG. 9, specifically includes the following steps:

Step 900: The MME application node encapsulates the update location request message according to the Diameter application protocol, and delivers the MME session node to the MME session node according to a specific interface.

In this step, the MME application node may specify a Diameter host name and a transmission type of the target HSS, such as SCTP.

In this step, the manner in which the MME application node delivers the update location request message application layer payload to the MME session node may be a pure IP mode or other manner defined by the data center to which it belongs.

Step 901: The MME session node generates a Diameter session ID and a session record for the message interaction according to the source MME node information and the target HSS node information according to the Diameter host name of the target HSS, and selects a corresponding SCTP-enabled transport node.

In this step, if the MME application node does not specify the Diameter host name and transmission type of the target HSS, the MME session node may determine the Diameter host name and transmission type of the target HSS through a local configuration policy or a third party.

Step 902: The MME session node delivers the update location request message application layer payload to the determined SCTP transport node according to the specific interface, and specifies the IP address of the target HSS or other identifier for the SCTP transport node to select the transport link.

In this step, the MME session node delivers the message application layer payload to the SCTP transport node, which may be a pure IP mode or other manner defined in the data center;

Step 903: The SCTP transmission node selects or newly establishes a transmission link according to the target IP or other identifier used for the transmission node to select the link.

Step 904: The SCTP encapsulates the location request message application layer payload into an SCTP and IP header, a MAC header, and the like, and finally sends the packet to the target HSS.

Embodiments of the present invention further provide the following apparatus for implementing communication between network nodes:

FIG. 9 is a schematic structural diagram of an apparatus for implementing communication between network nodes according to an embodiment of the present invention; Figure, as shown in Figure 9, comprising a first processing module, a first interface module; wherein

The apparatus shown in Figure 9 can be placed in a network node or can be a separate entity.

FIG. 10 is a schematic structural diagram of another apparatus for implementing communication between network nodes according to an embodiment of the present invention. As shown in FIG. 10, the method includes a second processing module and a second interface module.

a second processing module, configured to receive a presentation layer and/or an application layer payload from the application node that needs to be sent; determine a transmission link according to the target network node and the transmission type;

a second interface module, configured to include a presentation layer and/or an application layer payload through the determined transmission link, including a session layer, and/or a transport layer, and/or a network layer, and/or The data link layer is encapsulated and sent to the target network node.

Wherein, the information and transmission type of the target network node are specified by the application node; or

The second processing module is further configured to: determine the information and transmission type of the target network node by using a local configuration policy or a third party.

The second processing module determines that the transmission link includes:

The device shown in Figure 10 can be placed in a network node; or it can be a separate entity.

FIG. 11 is a schematic structural diagram of a device for implementing communication between network nodes according to an embodiment of the present invention. As shown in FIG. 11, the method includes a third processing module and a third interface module.

a third interface module configured to represent a presentation layer and/or an application layer payload from an application node It is delivered to the selected transport node and specifies the target network node or other identifier used by the transport node to select the link.

The third processing module is further configured to: determine the information and transmission type of the target network node by using a local configuration policy or a third party.

The third processing module determines that the transmission link includes:

The apparatus shown in FIG. 11 may be provided in a network node; or may be provided in a session transfer node; or may be a separate entity.

FIG. 12 is a schematic structural diagram of a device for implementing communication between network nodes according to an embodiment of the present invention. As shown in FIG. 12, the method includes a fourth processing module and a fourth interface module.

a fourth interface module, configured to include the transport layer, and/or network layer, and/or data necessary for network node communication by using the determined transport link to obtain the session layer and/or the presentation layer and/or the application layer payload The link layer or the like is encapsulated and sent to the target network node.

The apparatus shown in FIG. 12 may be provided in a network node; or may be provided in a session transfer node; or may be a separate entity.

In the embodiment of the present invention, if the port expansion method is implemented in the form of a software function module and is sold or used as an independent product, it may also be stored in a computer readable storage medium. Quality. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, an embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program for performing the foregoing method for implementing communication between network nodes according to an embodiment of the present invention.

The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A network node comprising an application node configured to perform application related processing, and a session transfer node configured to perform processing necessary for communication and transmission of communication;

The application node is configured to deliver the message to be sent to the session transfer node after being encapsulated by the presentation layer and/or the application layer;

a session transfer node configured to determine a session relationship and a transmission link according to information and a transmission type of the target network node, and to perform a presentation layer and/or an application layer payload from the application node through the determined transmission link, including a session layer, and / or the transport layer, and / or network layer, and / or data link layer is encapsulated and sent to the target network node.
The network node according to claim 1, wherein different application nodes belonging to the same data center share the same session transfer node or use different session transfer nodes.
The network node according to claim 1, wherein the session transfer node comprises: a session node configured to perform session processing necessary for communication, and a transfer node configured to perform transmission processing necessary for communication;

a session node, configured to determine a corresponding transport node according to information and a transmission type of the target network node; deliver the presentation layer and/or application layer payload from the application node to the selected transport node and specify a target network node Or other identifiers used by the transport node to select the link;

a transport node configured to determine a transport link based on a target network node or other identifier for the transport node to select the link, and to perform the payload obtained by the determined transport link including the transport layer, and/or the network layer, and/or Or the data link layer is encapsulated and sent to the target network node.
The network node according to claim 3, wherein the session node is further configured to: perform session layer encapsulation on the presentation layer and/or application layer payload before delivering to the selected transport node.
The network node according to claim 3 or 4, wherein the transmission node is divided into one or more transmission nodes according to different transmission types;

The same session node invokes a plurality of transmission nodes of different transmission types to send a message of a corresponding type.
The network node according to claim 1, 3 or 4, wherein the information and transmission type of the target network node are specified by the application node; or

The session transfer node or the session node is further configured to determine information and a transmission type of the target network node by a local configuration policy or a third party.
The network node according to claim 1, 3 or 4, wherein the session transmission node or the session node determines that the transmission link comprises:

Determining whether a transmission link has been established according to the information and transmission type of the target network node. If not established, the transmission link is newly established as a transmission path. If it is established, the established transmission link is selected as the transmission path. .
The network node according to claim 1 or 2, wherein the application node and the session transfer node are two independent entities or different modules arranged in the same entity.
The network node according to claim 3 or 4, wherein the application node, the session node and the transmission node are three independent entities or different modules arranged in the same entity.
A network node according to claim 3, 4 or 8, wherein said session node and said transport node are two separate entities or are different modules arranged in the same entity.
An apparatus for implementing communication between network nodes, comprising a first processing module, a first interface module, wherein

a first processing module, configured to perform a presentation layer and/or an application layer encapsulation on the message that needs to be sent;

The first interface module is configured to deliver the encapsulated presentation layer and/or application layer payload to the session transfer node.
The apparatus of claim 11 wherein said apparatus is disposed in a network node or is a separate entity.
An apparatus for implementing communication between network nodes, comprising a second processing module and a second interface module; wherein

a second processing module, configured to receive a presentation layer and/or an application layer payload from the application node; determine a transmission link according to the target network node and the transmission type;

a second interface module configured to include the presentation layer and/or the application layer payload obtained by the determined transmission link, including a session layer, and/or a transport layer, and/or a network layer, and/or a data link layer encapsulation Then send it to the target network node.
The apparatus of claim 13, wherein the information and transmission type of the target network node are specified by the application node; or

The second processing module is further configured to: determine, by a local configuration policy or a third party, information and a transmission type of the target network node.
The apparatus of claim 14, wherein the second processing module determines that the transmission link comprises:

Determining whether a transmission link has been established according to the information and transmission type of the target network node. If not established, the transmission link is newly established as a transmission path. If it is established, the established transmission link is selected as the transmission path. .
Apparatus according to any one of claims 13 to 15, wherein the apparatus is provided in a network node; or is a separate entity.
An apparatus for implementing communication between network nodes, comprising a third processing module and a third interface module; wherein

a third processing module, configured to receive a presentation layer and/or an application layer payload from the application node; and determine a corresponding transmission node according to the target network node and the transmission type;

a third interface module configured to represent a presentation layer and/or an application layer payload from an application node It is delivered to the selected transport node and specifies the target network node or other identifier used by the transport node to select the link.
The apparatus of claim 17, wherein the third interface module is further configured to: perform session layer encapsulation on the presentation layer and/or application layer payload before delivering to the selected transport node.
The apparatus according to claim 17 or 18, wherein information and transmission type of said target network node are specified by said application node; or

The third processing module is further configured to: determine, by a local configuration policy or a third party, information and a transmission type of the target network node.
The apparatus of claim 18, wherein the third processing module determines that the transmission link comprises:

Determining whether a transmission link has been established according to the information and transmission type of the target network node. If not established, the transmission link is newly established as a transmission path. If it is established, the established transmission link is selected as the transmission path. .
The apparatus according to claim 17 or 18, wherein said apparatus is provided in a network node; or is disposed in a session transfer node; or is a separate entity.
An apparatus for implementing communication between network nodes, comprising a fourth processing module and a fourth interface module; wherein

a fourth processing module configured to receive a session layer and/or a presentation layer and/or an application layer payload from the session node; determine a transmission link according to a target network node from the session node or other identifier for the transmission node to select the link ;

a fourth interface module, configured to send the obtained session layer and/or presentation layer and/or application layer payload to the transport layer, and/or the network layer, and/or the data link layer by using the determined transmission link Go to the target network node.
The apparatus of claim 22 wherein said apparatus is disposed in a network node; Either set in the session transfer node; or a separate entity.
A method for implementing communication between network nodes, the network node being split into an application node configured to complete application-related processing, and a session transfer node configured to perform processing necessary for communication and transmission of communication;

The application node completes the presentation layer and/or application layer encapsulation of the message to be sent, and delivers the encapsulated presentation layer and/or application layer payload to the session transfer node;

The session transfer node determines the transmission link according to the information and the transmission type of the target network node, and performs the presentation layer and/or application layer payload obtained through the determined transmission link, including the session layer, and/or the transport layer, and/or The network layer, and/or the data link layer is encapsulated and sent to the target network node.
The method of claim 24, wherein different said application nodes belonging to the same data center share the same session transfer node or use different said session transfer nodes.
The method according to claim 24, wherein said session transfer node is split into a session node configured to perform session processing necessary for communication, and a transfer node configured to perform transmission processing necessary for communication;

The session node determines a corresponding transport node according to the target network node and the transmission type; delivers the presentation layer and/or application layer payload from the application node to the selected transport node and specifies the target network node or other for transport node selection The identity of the link;

The transmitting node determines the transmission link according to the target network node or other identifier for the transmission node selection link, and performs the presentation layer and/or application layer payload obtained through the determined transmission link, including the transport layer, and/or the network. The layer, and/or data link layer is encapsulated and sent to the target network node.
The method of claim 26, wherein the method further comprises: the session node performing session layer encapsulation on the presentation layer and/or application layer payload and then delivering the selection to the selection Outgoing transfer node.
The method according to claim 26 or 27, wherein said transmission node is divided into one or more transmission nodes according to different transmission types;

The same session node invokes a plurality of transmission nodes of different transmission types to send a message of a corresponding type.
The method according to claim 24, 26 or 27, wherein the information and transmission type of the target network node are specified by the application node; or

The method also includes the session transmission node or the session node determining information and transmission type of the target network node by a local configuration policy or a third party.
The method of claim 24, 26 or 27, wherein the session transfer node or session node determines that the transmission link comprises:

Determining whether a transmission link has been established according to the information and transmission type of the target network node. If not established, the transmission link is newly established as a transmission path. If it is established, the established transmission link is selected as the transmission path. .
A computer storage medium having stored therein computer executable instructions for performing the method of implementing communication between network nodes as claimed in any one of claims 24 to 30.