WO2021180084A1

WO2021180084A1 - Data transmission method, nodes and storage medium

Info

Publication number: WO2021180084A1
Application number: PCT/CN2021/079788
Authority: WO
Inventors: 杜宗鹏; 耿亮
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2020-03-09
Filing date: 2021-03-09
Publication date: 2021-09-16
Also published as: CN113381920B; CN113381920A

Abstract

Disclosed in the embodiments of the present disclosure are a transmission method, nodes and a storage medium. Said method comprises: an encapsulation node sending a first data packet of a service flow to a mapping node, the first data packet comprising identifier information and service requirement information, the identifier information and the service requirement information being used for the mapping node to establish a mapping between the service flow and a communication tunnel; and upon determination that the mapping node has established a mapping between the service flow and the communication tunnel, the encapsulation node sending a second data packet to the mapping node, the second data packet comprising flow identifier information, the flow identifier information being a part of the identifier information, and the second data packet being a data packet of the service flow after the first data packet.

Description

Data transmission method, node and storage medium

Cross-references to related applications

The present disclosure is filed based on a Chinese patent application with an application number of 202010158986.0 and an application date of March 9, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into the present disclosure by way of introduction.

Technical field

The present disclosure relates to the field of communication technology, and in particular to a data transmission method, node and storage medium.

Background technique

In the Application-aware Networking (APN, Application-aware Networking) architecture, the encapsulation node carries demand information, such as service parameters (service parameters), in the data packets sent to the mapping node. The demand information is used to find or establish a suitable network Path, so as to achieve the network-aware service, the ability to complete the bearer on demand. In related technologies, data packets for the same service flow will all carry the above-mentioned demand information. In the case that a suitable network path is found or established based on the demand information carried in the first or some of the first data packets, it is equivalent to the subsequent Data packets carry a lot of repeated information, causing a waste of bandwidth.

Summary of the invention

The embodiments of the present disclosure expect to provide a data transmission method, node, and storage medium.

In order to achieve the foregoing objectives, the technical solutions of the embodiments of the present disclosure are implemented as follows:

In the first aspect, embodiments of the present disclosure provide a data transmission method, the method including:

The encapsulation node sends a first data packet of the service flow to the mapping node, where the first data packet includes identification information and service requirement information; the identification information and the service requirement information are used by the mapping node to establish the service flow And the mapping of the communication tunnel; after determining that the mapping node establishes the mapping between the service flow and the communication tunnel, the encapsulation node sends a second data packet to the mapping node, and the second data packet includes flow identification information, The flow identification information is a part of the identification information; the second data packet is a data packet after the first data packet of the service flow.

In some optional embodiments of the present disclosure, the encapsulation node determining that the mapping node establishes the mapping between the service flow and the communication tunnel includes: when the encapsulation node sends the first data packet, or sends the After the first data packet, a timer is started; when the timing of the timer expires, it is determined that the mapping node establishes the mapping between the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, that the encapsulation node determines that the mapping node establishes the mapping between the service flow and the communication tunnel includes: the encapsulation node receives notification information sent by the mapping node, based on the The notification information determines that the mapping node establishes the mapping between the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, the receiving of the notification information sent by the mapping node by the encapsulation node includes: the encapsulation node uses Internet Control Management Protocol Version 6 (ICMPv6, Internet Control Management Protocol Version 6) messages Receiving notification information sent by the mapping node; a specific field in the data field in the ICMPv6 message is used to indicate the notification information.

In some optional embodiments of the present disclosure, the sending the second data packet to the mapping node includes: the encapsulating node sends the second data packet in the APN format to the mapping node; and the second data packet in the APN format The specific field of the second data packet includes the flow identification information.

In some optional embodiments of the present disclosure, the sending the second data packet to the mapping node includes: the encapsulation node uses an Internet Protocol Version 6 (IPv6, Internet Protocol Version 6) data packet to map to the mapping node The node sends a second data packet; the bits of the specific field of the IPv6 data packet correspond to the flow identification information.

In a second aspect, an embodiment of the present disclosure also provides a data transmission method, the method includes: a mapping node receives a first data packet of a service flow sent by an encapsulation node, and the first data packet includes identification information and service requirements Information; the mapping node establishes the mapping of the service flow and the communication tunnel based on at least the identification information and the service requirement information, and forwards the first data packet through the communication tunnel; the mapping node receives the encapsulation node The second data packet sent includes flow identification information; the flow identification information is a part of the identification information; the second data packet is the first data of the service flow A data packet after the packet; the mapping node determines the corresponding communication tunnel based on at least the flow identification information and the mapping, and forwards the second data packet through the communication tunnel.

In some optional embodiments of the present disclosure, the mapping node that establishes the mapping of the service flow and the communication tunnel based on at least the identification information and the service requirement information includes: the mapping node extracts all of the identification information The flow identification information, and the source node information of the first data packet obtained; create or select a communication tunnel that meets the service requirement information; establish the source node information, the flow identification information, and the communication tunnel Mapping; the mapping node determines the corresponding communication tunnel based on at least the flow identification information and the mapping, including: the mapping node determines all corresponding to the flow identification information and the source node information based on the mapping The communication tunnel.

In some optional embodiments of the present disclosure, before the mapping node receives the second data packet sent by the encapsulation node, the method further includes: the mapping node sends notification information to the encapsulation node, the notification The information is used to notify the encapsulation node that the mapping between the service flow and the communication tunnel has been established; the notification information is sent after the mapping node has established the mapping between the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, the sending of the notification information by the mapping node to the encapsulation node includes: the mapping node sends the notification information to the encapsulation node through an ICMPv6 message, and in the ICMPv6 message The specific field in the data field is used to indicate the notification information.

In some optional embodiments of the present disclosure, the receiving, by the mapping node, the second data packet sent by the encapsulation node includes: receiving, by the mapping node, the second data packet in the APN format sent by the encapsulation node; The specific field of the second data packet in the APN format includes the stream identification information.

In some optional embodiments of the present disclosure, the receiving, by the mapping node, the second data packet sent by the encapsulation node includes: the mapping node receives the second data packet sent by the encapsulation node through an IPv6 data packet; At least some bits of the specific field of the IPv6 data packet correspond to the flow identification information.

In a third aspect, an embodiment of the present disclosure also provides an encapsulation node, the encapsulation node includes: a first communication unit and a first processing unit; wherein,

The first communication unit is configured to send a first data packet of a service flow to a mapping node, where the first data packet includes identification information and service requirement information; the identification information and the service requirement information are used in the A mapping node establishes a mapping between the service flow and the communication tunnel;

The first processing unit is configured to determine whether the mapping node establishes a mapping between the service flow and the communication tunnel;

The first communication unit is further configured to send a second data packet to the mapping node after the first processing unit determines that the mapping node establishes the mapping between the service flow and the communication tunnel, and the second data packet The flow identification information is included in the flow identification information, and the flow identification information is a part of the identification information; the second data packet is a data packet of the service flow after the first data packet.

In some optional embodiments of the present disclosure, the first processing unit is configured to start a timer when the first communication unit sends the first data packet or after the first data packet is sent; When the timing of the timer expires, it is determined that the mapping node establishes the mapping between the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, the first processing unit is configured to receive notification information sent by the mapping node through the first communication unit, and based on the notification information, determine that the mapping node establishes the Mapping of service flow and communication tunnel.

In some optional embodiments of the present disclosure, the first processing unit is configured to receive notification information sent by the mapping node through an ICMPv6 message; a specific field in the data field in the ICMPv6 message is used to indicate The notification information.

In some optional embodiments of the present disclosure, the first communication unit is configured to send a second data packet in the APN format to the mapping node; the specific field of the second data packet in the APN format includes the Stream identification information.

In some optional embodiments of the present disclosure, the first communication unit is configured to send a second data packet to the mapping node through an IPv6 data packet; the bits of a specific field of the IPv6 data packet correspond to the Stream identification information.

In a fourth aspect, an embodiment of the present disclosure also provides a mapping node, the mapping node includes: a second communication unit and a second processing unit; wherein,

The second communication unit is configured to receive a first data packet of a service flow sent by an encapsulation node, where the first data packet includes identification information and service requirement information;

The second processing unit is configured to establish a mapping between the service flow and the communication tunnel based on at least the identification information and the service requirement information;

The second communication unit is further configured to forward the first data packet through the communication tunnel; and further configured to receive a second data packet sent by the encapsulation node, the second data packet including flow identification information; The flow identification information is a part of the identification information; the second data packet is a data packet of the service flow after the first data packet;

The second processing unit is further configured to determine the corresponding communication tunnel based on at least the flow identification information and the mapping;

The second communication unit is further configured to forward the second data packet through the communication tunnel.

In some optional embodiments of the present disclosure, the second processing unit is configured to extract the flow identification information in the identification information, and obtain the source node information of the first data packet; create or select The communication tunnel of the service requirement information; establishing the source node information, the flow identification information, and the mapping of the communication tunnel; and further configured to determine that the flow identification information corresponds to the source node information based on the mapping The communication tunnel.

In some optional embodiments of the present disclosure, the second communication unit is further configured to send notification information to the encapsulation node before receiving the second data packet sent by the encapsulation node, and the notification information is used to notify The encapsulation node has established the mapping between the service flow and the communication tunnel; the notification information is sent after the mapping node has established the mapping between the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, the second communication unit is configured to send notification information to the encapsulation node through an ICMPv6 message, and a specific field in the data field in the ICMPv6 message is used to indicate The notification information.

In some optional embodiments of the present disclosure, the second communication unit is configured to receive a second data packet in the APN format sent by the encapsulation node; the specific field of the second data packet in the APN format includes all The stream identification information.

In some optional embodiments of the present disclosure, the second communication unit is configured to receive a second data packet sent by the encapsulation node through an IPv6 data packet; at least some bits of a specific field of the IPv6 data packet correspond to于The stream identification information.

In a fifth aspect, the embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the method described in the first aspect or the second aspect of the embodiments of the present disclosure are implemented .

In a sixth aspect, the embodiments of the present disclosure also provide a node, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. The processor implements the embodiments of the present disclosure when the program is executed. The steps of the method described in the first or second aspect.

The data transmission method, node, and storage medium provided by the embodiments of the present disclosure include: an encapsulating node sends a first data packet of a service flow to a mapping node, and the first data packet includes identification information and service requirement information; The identification information and the service requirement information are used by the mapping node to establish the mapping between the service flow and the communication tunnel; after determining that the mapping node establishes the mapping between the service flow and the communication tunnel, send the first mapping node to the mapping node Two data packets, the second data packet includes flow identification information, the flow identification information is a part of the identification information; the second data packet is the service flow after the first data packet One packet. Using the technical solution of the embodiment of the present disclosure, the first or first data packets (ie, the first data packet) containing identification information and service requirement information are transmitted through the encapsulation node, so that the mapping node can establish a service based on the identification information and service requirement information The mapping between the flow and the communication tunnel; the second data packet containing only the flow identification information is transmitted through the encapsulation node, so that the mapping node forwards the second data packet through the communication tunnel corresponding to the flow identification information based on the established mapping, thereby achieving The reduction of the information carried in the data packet prevents the repeated transmission of the same information in each data packet and reduces the waste of bandwidth.

Description of the drawings

FIG. 1 is a schematic diagram of the system architecture of the application of the data transmission method provided by the embodiments of the present disclosure;

FIG. 2 is a first schematic flowchart of a data transmission method provided by an embodiment of the present disclosure;

FIG. 3 is a second schematic diagram of a flow of a data transmission method provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an implementation manner of notification information in a data transmission method provided by an embodiment of the disclosure;

FIG. 5 is a first schematic diagram of interaction of a data transmission method provided by an embodiment of the present disclosure;

FIG. 6 is a second schematic diagram of interaction of a data transmission method provided by an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of the composition structure of a package node according to an embodiment of the disclosure;

FIG. 8 is a schematic diagram of the composition structure of a mapping node according to an embodiment of the disclosure;

FIG. 9 is a schematic diagram of the hardware composition structure of a node according to an embodiment of the disclosure.

Detailed ways

The present disclosure will be further described in detail below with reference to the drawings and specific embodiments.

Figure 1 is a schematic diagram of the system architecture of the application of the data transmission method provided by the embodiments of the disclosure; as shown in Figure 1, the system includes: a client (Client), an application-aware-edge node, and an application-aware processing front-end ( App-aware process Head-End), application-aware process Mid-Point, application-aware process End-Point and server (Server).

Among them, the client terminal can be through electronic devices such as mobile terminals such as mobile phones and tablet computers or personal computers; one or more application programs (APP) can be installed in the client terminal for accessing the application programs by operating the icons of the application programs. In the related technical solutions, during the process of the application being accessed, the application can generate packets containing various identification information and business requirement information, and send them to the application-aware edge node; or, the application can send operation-related data to the application For the sensing edge node, the application sensing edge encapsulates data packets containing various identification information and business requirements, and sends them to the application sensing processing front end. The application-aware processing front-end establishes a mapping between the service flow and the communication tunnel according to the communication tunnel that is determined to meet the business needs, and the data packet is transmitted to the server through the communication tunnel, through the application-aware processing midpoint and the application-aware processing end point, from the server to the client Respond to the access of the application.

The encapsulation node in this embodiment may be the client in FIG. 1 (specifically, it may be an application in the client) or an application-aware edge node; the mapping node may be the application-aware processing front end in FIG. 1. Exemplarily, the application-aware edge node may be an access device such as a router or an access network device such as a base station. The application-aware processing front end may be an access device such as a router.

Based on the system architecture shown in FIG. 1, the following embodiments of the present disclosure are proposed.

The embodiment of the present disclosure provides a data transmission method. FIG. 2 is a schematic diagram 1 of the flow of a data transmission method provided by an embodiment of the present disclosure; as shown in FIG. 2, the method includes:

Step 101: The encapsulation node sends a first data packet of the service flow to the mapping node, where the first data packet includes identification information and service requirement information; the identification information and the service requirement information are used by the mapping node to establish a The mapping between the service flow and the communication tunnel;

Step 102: After determining that the mapping node establishes the mapping between the service flow and the communication tunnel, the encapsulation node sends a second data packet to the mapping node. The second data packet includes flow identification information, and the flow The identification information is a part of the identification information; the second data packet is a data packet after the first data packet of the service flow.

In this embodiment, the encapsulation node may be the client shown in FIG. 1 (specifically, it may be an application in the client) or an application-aware edge node.

In this embodiment, when the user accesses the application of the client, the client will generate access data for this access of the application, and the generated access data forms multiple data packets, which form a business flow for this access of the application. That is, the service flow includes multiple data packets. Wherein, the first data packet may be the first data packet for this visit or one of the first data packets (that is, the first data packet in the first data packets or one of the multiple data packets). data pack). The second data packet is any data packet after the first data packet.

In this embodiment, if the client is an encapsulation node, the client encapsulates the access data, and generates a first data packet including identification information and business requirement information. If the application-aware edge node is an encapsulation node, the client sends the access data to the application-aware edge node, and the application-aware edge node encapsulates the access data to generate a first data packet including identification information and service requirement information. Similarly, if the client is an encapsulation node, the client encapsulates the access data, and generates a second data packet including flow identification information. If the application-aware edge node is an encapsulation node, the client sends the access data to the application-aware edge node, and the application-aware edge node encapsulates the access data to generate a second data packet including flow identification information.

Wherein, the identification information may include: application identification, user identification, and flow identification information. Among them, the application identifier is used to identify the currently accessed application, and in actual applications, it can be indicated by the application identifier (for example, the name of the application or the identification code representing the application); the user identifier is used to identify the user accessing the application, In actual applications, it can be represented by the user's user name or client identification in the application; the flow identification information is used to indicate the service flow, and the flow identification information corresponding to different service flows is different. Wherein, the service requirement information includes any one of bandwidth, time delay, jitter, and packet loss rate or a combination of several types of information. It can be understood that the service requirement information represents the basic requirements of the communication tunnel carrying the current service flow. For example, the bandwidth of the communication tunnel needs to be greater than or equal to the bandwidth indicated in the service requirement information, and the delay of the communication tunnel must be less than or equal to the bandwidth indicated in the service requirement information. Time delay and so on.

It is understandable that the flow identification information is only one kind of identification information, that is, in this embodiment, the first data packet contains complete application identification, user identification, identification information of flow identification information, and business requirement information. The identification information and service requirement information in the first data packet are used by the mapping node to establish the mapping of the service flow and the communication tunnel; and the second data packet sent subsequently only includes the flow identification information, and the mapping node can determine based on the flow identification information The communication tunnel corresponding to the service flow.

In this embodiment, optionally, the second data packet may not include the service requirement information and other identification information other than the flow identification information.

Compared with the related technology, each data packet transmitted by the encapsulation node to the mapping node includes identification information and service requirement information. In the embodiment of the present disclosure, the encapsulation node transmits the first or the first data including identification information and service requirement information. The data packet (that is, the first data packet) enables the mapping node to establish a mapping between the service flow and the communication tunnel based on the identification information and the service requirement information; then the second data packet containing only the flow identification information is transmitted through the encapsulation node, so that the mapping node is based on The established mapping forwards the second data packet through the communication tunnel corresponding to the flow identification information, thereby achieving the simplification of the information carried in the data packet, avoiding repeated transmission of the same information in each data packet, and reducing bandwidth waste.

In an optional embodiment of the present disclosure, the encapsulation node determining that the mapping node establishes the mapping between the service flow and the communication tunnel includes: when the encapsulation node sends the first data packet, or send After the first data packet, a timer is started; when the timing of the timer expires, it is determined that the mapping node establishes the mapping between the service flow and the communication tunnel.

In this embodiment, the encapsulating node starts a timer when sending the first data packet or after sending the first data packet. When the timer expires, it can be determined that the mapping node establishes the service flow. And the mapping of the communication tunnel. Wherein, the timing time of the timer can be pre-configured based on experience or requirements. Exemplarily, the timing time of the timer is 3 seconds, for example.

In another optional embodiment of the present disclosure, that the encapsulation node determines that the mapping node establishes the mapping between the service flow and the communication tunnel includes: the encapsulation node receives notification information sent by the mapping node, based on The notification information determines that the mapping node establishes the mapping between the service flow and the communication tunnel.

In this embodiment, after the encapsulation node sends the first data packet, the mapping node may establish the mapping between the service flow and the communication tunnel based on the identification information and the service requirement information in the first data packet, and After the establishment of the mapping is completed, the mapping node sends a notification message to the encapsulation node; upon receiving the notification information, the encapsulation node can determine that the mapping node establishes the mapping between the service flow and the communication tunnel.

The receiving, by the encapsulation node, the notification information sent by the mapping node includes: the encapsulation node receives the notification information sent by the mapping node through an ICMPv6 message; the specific field in the data field in the ICMPv6 message is used for To indicate the notification information.

In this embodiment, the notification information can be implemented through an improved ping6 message. Among them, the ping6 message can refer to the ICMPv6 message, that is, the notification information is transmitted through the ICMPv6 message. Among them, the format of the ICMPv6 message can be referred to as shown in Figure 4, at least including the type (Type) field, code (Code) field, checksum (Checksum) field, identifier (Identifier) field, sequence shown in Figure 4 Number (Sequence Number) field and data (Data) field. In this embodiment, the notification information may be indicated by a specific field in the data (Data) field in the ICMPv6 message.

Optionally, a new data type length value (TLV, Tag Length Value) can be defined for at least some of the fields in the data field, for example, a specific bit is defined, where the value of the specific bit is a specific value In this case, it may indicate that the ICMPv6 message includes the notification information.

Exemplarily, if the data fields are as shown in Table 1, for example, a TLV with Type=1 is defined, and the content is mainly the source address (SA, Source Address), destination address (DA, Destination Address), Flow ID, and Flags fields, Reserved For reserved fields, for example, for the Flags field, define that the first bit (bit) is related to notification information, and when the value of the first bit is 1, it is used to indicate the above notification information, and when the value of the first bit is 0, it means not. Including the above notification information.

Table 1

In some optional embodiments of the present disclosure, the sending a second data packet to the mapping node includes: the encapsulating node sends the second data packet to the mapping node through an IPv6 data packet; the IPv6 data packet The bits of the specific field correspond to the stream identification information.

In this embodiment, as an implementation manner, the encapsulating node sends a second data packet in the APN format to the mapping node. As an example, the encapsulation node may send the second data packet to the mapping node through an IPv6 segment routing (SRv6, Segment Routing IPv6) packet. Among them, the SRv6 message, as an extension of IPv6, is a new extension in the IP extension header of IPv6, and the extension is called the Segment Routing Header (SRH, Segment Routing Header).

As another implementation manner, the encapsulation node sends the second data packet to the mapping node through an IPv6 data packet. Exemplarily, the header format of the IPv6 data packet may refer to Table 2 below, and the encapsulating node may indicate the flow identification information through the flow label (Flow Label) field in the IPv6 data packet. It can be understood that, in this embodiment, the encapsulation node may send an IPv6 data packet directly to the mapping node. The Flow Label field in the IPv6 data packet represents flow identification information, which is compared with sending the second data in the APN format. Packets, this embodiment can reduce the overhead of related encapsulation.

Table 2

It can be understood that, in this embodiment, the encapsulating node sends the first data packet in the APN format to the mapping node.

Based on the foregoing embodiment, the embodiment of the present disclosure also provides a data transmission method. FIG. 3 is a second schematic diagram of the flow of a data transmission method provided by an embodiment of the present disclosure; as shown in FIG. 3, the method includes:

Step 201: The mapping node receives the first data packet of the service flow sent by the encapsulation node, where the first data packet includes identification information and service requirement information;

Step 202: The mapping node establishes a mapping between the service flow and the communication tunnel based on at least the identification information and the service requirement information, and forwards the first data packet through the communication tunnel;

Step 203: The mapping node receives a second data packet sent by the encapsulation node, where the second data packet includes flow identification information; the flow identification information is a part of the identification information; the second data packet Is a data packet after the first data packet of the service flow;

Step 204: The mapping node determines the corresponding communication tunnel based on at least the flow identification information and the mapping, and forwards the second data packet through the communication tunnel.

In this embodiment, the mapping node may be the application-aware processing front end shown in FIG. 1.

In this embodiment, the source node information is specifically the source address of the first data packet, or it can also be said that the source node information is the address of the encapsulating node. It can be understood that during data transmission, the data usually carries an active address and a destination address. The source address is used to let the node receiving the data know which node the data is sent from, and the destination address is used to send the data to the destination node. After receiving the first data packet, the mapping node finds a communication tunnel that meets the business demand information from the created communication tunnels according to the business demand information in the first data packet, or recreates a communication tunnel that meets the business demand information The communication tunnel is established, and the mapping of source node information, identification information and communication tunnel is established. Wherein, the identification information may include: application identification, user identification, and flow identification information, and the mapping node may establish the mapping between the above three identifications, source node information, and communication tunnel, or only flow identification information, source node information, and The mapping of the communication tunnel. Among them, the source node information, as the address of the source node (i.e. encapsulation node), is the unique identification of the encapsulation node; the flow identification information is unique within the source node (i.e. encapsulation node), but may not be unique in the entire network. That is, for all flow identifications in the network, there may be repeated flow identifications. Based on this, in this embodiment, the mapping established by the mapping node includes the mapping of source node information, flow identification information, and communication channel.

Correspondingly, after the mapping node receives the second data packet, it searches for the mapping based on the source node information of the second data packet and the flow identification information carried in the second data packet, that is, based on the source of the second data packet The address of the node (that is, the encapsulating node) and the flow identification information look up the mapping, determine a communication tunnel that meets both the source node information and the flow identification information, and forward the second data packet based on the communication tunnel.

In this embodiment, after the mapping node establishes the mapping between the service flow and the communication tunnel, it may send notification information to the encapsulation node to inform the encapsulation node that the mapping of the current service flow and the communication tunnel is completed.

In this embodiment, the notification information can be implemented through an improved ping6 message. Among them, the ping6 message can refer to the ICMPv6 message, that is, the notification information is transmitted through the ICMPv6 message. The format of the ICMPv6 message can be referred to as shown in FIG. 4, and includes at least the fields shown in FIG. 4. In this embodiment, the notification information may be indicated by a specific field in the data (Data) field in the ICMPv6 message.

Optionally, a new data TLV can be defined for at least some of the fields in the data field, for example, a specific bit is defined, and when the value of the specific bit is a specific value, it can represent the ICMPv6 message Including the notification information. For example, for the Flags field in the data field, it is defined that the first bit (bit) is related to the notification information, and when the value of the first bit is 1, it is used to indicate the above notification information, and when the value of the first bit is 0, it means not. Including the above notification information.

In this embodiment, as an implementation manner, the encapsulating node sends a second data packet in the APN format to the mapping node. As an example, the encapsulation node may send the second data packet to the mapping node through an SRv6 message. Among them, the SRv6 message, as an extension of IPv6, is a new extension in the IP extension header of IPv6, and the extension part is called SRH.

As another implementation manner, the encapsulation node sends a second data packet to the mapping node through an IPv6 data packet. Exemplarily, the header format of the IPv6 data packet may refer to the above Table 2, and the encapsulating node may indicate the flow identification information through the flow label (Flow Label) field in the IPv6 data packet. It can be understood that, in this embodiment, the encapsulation node may send an IPv6 data packet directly to the mapping node. The Flow Label field in the IPv6 data packet represents flow identification information, which is compared with sending the second data in the APN format. Packets, this embodiment can reduce the overhead of related encapsulation.

Using the technical solution of the embodiment of the present disclosure, the first or first data packets (ie, the first data packet) containing identification information and service requirement information are transmitted through the encapsulation node, so that the mapping node can establish a service based on the identification information and service requirement information The mapping between the flow and the communication tunnel; the second data packet containing only the flow identification information is transmitted through the encapsulation node, so that the mapping node forwards the second data packet through the communication tunnel corresponding to the flow identification information based on the established mapping, thereby achieving The reduction of the information carried in the data packet prevents the repeated transmission of the same information in each data packet and reduces the waste of bandwidth.

The following describes the embodiments of the present disclosure in combination with specific examples.

Example one

FIG. 5 is a schematic diagram 1 of interaction of a data transmission method provided by an embodiment of the present disclosure; as shown in FIG. 5, the method includes:

Step 301: The encapsulating node sends a first data packet of the service flow to the mapping node, where the first data packet includes identification information and service requirement information.

Here, the encapsulation node is a node that encapsulates the data packet in the APN format, and may specifically be the client shown in FIG. 1 (specifically, it may be an application in the client) or an application-aware edge node. Wherein, the identification information may include: application identification, user identification, and flow identification information, and the service requirement information includes any one of bandwidth, delay, jitter, and packet loss rate.

Step 302: The mapping node establishes a mapping between the service flow and the communication tunnel based on the identification information and the service requirement information.

Here, after receiving the first data packet, the mapping node finds a communication tunnel that meets the business demand information from the created communication tunnels according to the business demand information in the first data packet, or recreates a communication tunnel that meets the business demand information Information communication tunnel, and establish the source node information, identification information and the mapping of the communication tunnel. Wherein, the identification information may include: application identification, user identification, and flow identification information, and the mapping node may establish the mapping between the above three identifications, source node information, and communication tunnel, or only flow identification information, source node information, and The mapping of the communication tunnel; or, the mapping node can also establish the mapping of flow identification information, source node information, target node information, and the communication tunnel. Wherein, the source node information may be the address of the source node (such as the encapsulation node), and the target node is the address of the target node to which the data packet is to be transmitted.

Exemplarily, the source node information is the address of the source node, hereinafter referred to as the source address, and the target node information is the address of the target node, hereinafter referred to as the destination address. Then the mapping may include the source address, flow identification information, and communication The mapping of the tunnel identifier; or, the mapping may also include the mapping of the source address, the destination address, the flow identification information, and the communication tunnel identifier.

Step 303: The encapsulation node determines that the mapping node establishes the mapping between the service flow and the communication tunnel, which can be implemented in the following two ways:

Step 303a: The mapping node sends notification information to the encapsulation node. Upon receiving the notification information, the encapsulation node can determine that the mapping node has established a mapping between the service flow and the communication tunnel.

Step 303b: The encapsulating node waits for a preset period of time when sending the first data packet or after sending the first data packet, and it can be determined that the mapping node has established the mapping between the service flow and the communication tunnel.

Here, the encapsulating node may start a timer when sending the first data packet or after sending the first data packet, and when the timer expires, it may be determined that the mapping node has established the mapping between the service flow and the communication tunnel.

Step 304: The encapsulating node sends a second data packet in the APN format to the mapping node, where the second data packet includes flow identification information.

It can be understood that after the mapping node has established and completed the mapping between the service flow and the communication tunnel, all subsequent second data packets sent do not carry service requirement information and other identifiers except flow identification information, and are only in the second data packet. Carry flow identification information; after receiving the second data packet, the mapping node searches for the communication tunnel identification that matches the source node information of the second data packet and the flow identification information according to the established mapping, and passes the second data packet through the matching The communication tunnel corresponding to the communication tunnel identifier is forwarded.

Example two

FIG. 6 is a second schematic diagram of interaction of a data transmission method provided by an embodiment of the disclosure; as shown in FIG. 6, the method includes:

Step 401: The encapsulating node sends the first data packet of the service flow to the mapping node, where the first data packet includes identification information and service requirement information.

Step 402: The mapping node establishes a mapping between the service flow and the communication tunnel based on the identification information and the service requirement information.

Step 403: The encapsulation node determines that the mapping node establishes the mapping between the service flow and the communication tunnel, which can be implemented in the following two ways:

Step 403a: The mapping node sends notification information to the encapsulation node. Upon receiving the notification information, the encapsulation node can determine that the mapping node has established a mapping between the service flow and the communication tunnel.

Step 403b: The encapsulating node waits for a preset period of time when sending the first data packet or after sending the first data packet, and it can be determined that the mapping node has established the mapping between the service flow and the communication tunnel.

Step 404: The encapsulating node sends a second data packet to the mapping node through an IPv6 data packet; the bits of a specific field of the IPv6 data packet correspond to the flow identification information.

The embodiment of the present disclosure also provides a package node. FIG. 7 is a schematic diagram of the composition structure of an encapsulation node according to an embodiment of the disclosure; as shown in FIG. 7, the encapsulation node includes: a first communication unit 51 and a first processing unit 52; wherein,

The first communication unit 51 is configured to send a first data packet of a service flow to a mapping node, where the first data packet includes identification information and service requirement information; the identification information and the service requirement information are used for all The mapping node establishes a mapping between the service flow and the communication tunnel;

The first processing unit 52 is configured to determine whether the mapping node establishes a mapping between the service flow and the communication tunnel;

The first communication unit 51 is further configured to send a second data packet to the mapping node after the first processing unit 52 determines that the mapping node establishes the mapping between the service flow and the communication tunnel, and the second processing unit 52 The data packet includes flow identification information, and the flow identification information is a part of the identification information; the second data packet is a data packet of the service flow after the first data packet.

In some optional embodiments of the present disclosure, the first processing unit 52 is configured to start timing when the first communication unit 51 sends the first data packet, or after sending the first data packet器; When the timer expires, it is determined that the mapping node establishes the mapping of the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, the first processing unit 52 is configured to receive the notification information sent by the mapping node through the first communication unit 51, and determine that the mapping node is established based on the notification information The mapping between the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, the first processing unit 52 is configured to receive the notification information sent by the mapping node through an ICMPv6 message; a specific field in the data field in the ICMPv6 message is used for Indicates the notification information.

In some optional embodiments of the present disclosure, the first communication unit 51 is configured to send a second data packet in the APN format to the mapping node; the specific field of the second data packet in the APN format includes all The stream identification information.

In some optional embodiments of the present disclosure, the first communication unit 51 is configured to send a second data packet to the mapping node through an IPv6 data packet; the bits of the specific field of the IPv6 data packet correspond to all the bits in the specific field of the IPv6 data packet. The stream identification information.

In the embodiment of the present disclosure, the first processing unit 52 in the packaging node can be implemented by, for example, a central processing unit (CPU, Central Processing Unit), a digital signal processor (DSP, Digital Signal Processor), and a micro-controller in practical applications. Unit (MCU, Microcontroller Unit) or Programmable Gate Array (FPGA, Field-Programmable Gate Array) implementation; the first communication unit 51 in the package node can be implemented through a communication module (including: basic communication suite) in practical applications , Operating system, communication module, standardized interface and protocol, etc.) and the realization of the transceiver antenna.

It should be noted that when the encapsulation node provided in the above embodiment performs data transmission, only the division of the above-mentioned program modules is used as an example for illustration. In actual applications, the above-mentioned processing can be allocated by different program modules according to needs, i.e. The internal structure of the encapsulation node is divided into different program modules to complete all or part of the processing described above. In addition, the encapsulation node provided in the foregoing embodiment and the data transmission method embodiment belong to the same concept. For the specific implementation process, please refer to the method embodiment, which will not be repeated here.

The embodiment of the present disclosure also provides a mapping node. FIG. 8 is a schematic diagram of the composition structure of a mapping node according to an embodiment of the disclosure; as shown in FIG. 8, a second communication unit 61 and a second processing unit 62; among them,

The second communication unit 61 is configured to receive a first data packet of a service flow sent by an encapsulation node, where the first data packet includes identification information and service requirement information;

The second processing unit 62 is configured to establish a mapping between the service flow and the communication tunnel based on at least the identification information and the service requirement information;

The second communication unit 61 is further configured to forward the first data packet through the communication tunnel; and is further configured to receive a second data packet sent by the encapsulation node, the second data packet including flow identification information The flow identification information is a part of the identification information; the second data packet is a data packet after the first data packet of the service flow;

The second processing unit 62 is further configured to determine the corresponding communication tunnel based on at least the flow identification information and the mapping;

The second communication unit 61 is further configured to forward the second data packet through the communication tunnel.

In some optional embodiments of the present disclosure, the second processing unit 62 is configured to extract the flow identification information in the identification information, and obtain the source node information of the first data packet; create or select A communication tunnel that satisfies the service requirement information; establishes the source node information, the flow identification information, and a mapping with the communication tunnel; and is further configured to determine the flow identification information and the source node information based on the mapping The corresponding communication tunnel.

In some optional embodiments of the present disclosure, the second communication unit 61 is further configured to send notification information to the encapsulation node before receiving the second data packet sent by the encapsulation node, where the notification information is used for Notifying the encapsulation node that the mapping between the service flow and the communication tunnel has been established; the notification information is sent after the mapping node has established the mapping between the service flow and the communication tunnel.

In some optional embodiments of the present disclosure, the second communication unit 61 is configured to send notification information to the encapsulation node through an ICMPv6 message, and a specific field in the data field in the ICMPv6 message is used to indicate The notification information.

In some optional embodiments of the present disclosure, the second communication unit 61 is configured to receive a second data packet in the APN format sent by the encapsulation node; the specific field of the second data packet in the APN format includes The stream identification information.

In some optional embodiments of the present disclosure, the second communication unit 61 is configured to receive a second data packet sent by the encapsulation node through an IPv6 data packet; at least some bits of a specific field of the IPv6 data packet Corresponds to the stream identification information.

In the embodiment of the present disclosure, the second processing unit 62 in the mapping node can be implemented by, for example, a CPU, DSP, MCU, or FPGA in practical applications; the second communication unit 61 in the packaging node is in practical applications It can be realized through a communication module (including: basic communication kit, operating system, communication module, standardized interface and protocol, etc.) and a transceiver antenna.

It should be noted that when the mapping node provided in the above embodiment performs data transmission, only the division of the above-mentioned program modules is used as an example. In actual applications, the above-mentioned processing can be allocated by different program modules according to needs, i.e. The internal structure of the mapping node is divided into different program modules to complete all or part of the processing described above. In addition, the mapping node provided in the foregoing embodiment and the data transmission method embodiment belong to the same concept. For the specific implementation process, please refer to the method embodiment, which will not be repeated here.

The embodiment of the present disclosure also provides a node. FIG. 9 is a schematic diagram of the hardware composition structure of the node of the embodiment of the disclosure. As shown in FIG. 9, the node includes a memory 72, a processor 71, and a computer program stored in the memory 72 and running on the processor 71. The processing The device 71 implements the steps of the data transmission method applied to the encapsulation node or the mapping node described in the embodiment of the present disclosure when the program is executed.

Optionally, one or more network interfaces 73 may also be included in the node. It can be understood that the various components in the node are coupled together through the bus system 74. It can be understood that the bus system 74 is used to implement connection and communication between these components. In addition to the data bus, the bus system 74 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clear description, various buses are marked as the bus system 74 in FIG. 9.

It can be understood that the memory 72 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read- Only Memory, Electrically Erasable Programmable Read-Only Memory (EEPROM), Ferromagnetic Random Access Memory (FRAM), Flash Memory, Magnetic Surface Memory , CD-ROM, or CD-ROM (Compact Disc Read-Only Memory); magnetic surface memory can be magnetic disk storage or tape storage. The volatile memory may be a random access memory (RAM, Random Access Memory), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (SRAM, Static Random Access Memory), synchronous static random access memory (SSRAM, Synchronous Static Random Access Memory), and dynamic random access memory. Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), enhanced Type synchronous dynamic random access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), synchronous connection dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, Direct Rambus Random Access Memory) ). The memory 72 described in the embodiments of the present disclosure is intended to include, but is not limited to, these and any other suitable types of memory.

The methods disclosed in the foregoing embodiments of the present disclosure may be applied to the processor 71 or implemented by the processor 71. The processor 71 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 71 or instructions in the form of software. The aforementioned processor 71 may be a general-purpose processor, a DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like. The processor 71 may implement or execute various methods, steps, and logical block diagrams disclosed in the embodiments of the present disclosure. The general-purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present disclosure may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the memory 72. The processor 71 reads the information in the memory 72 and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the node may be configured by one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), complex programmable logic device (CPLD, Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, microprocessor (Microprocessor), or other electronic components to implement the foregoing method.

In an exemplary embodiment, the embodiment of the present disclosure also provides a computer-readable storage medium, such as a memory 72 including a computer program, which can be executed by the processor 71 of the node to complete the steps described in the foregoing method. The computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM; it may also be various devices including one or any combination of the foregoing memories.

The computer-readable storage medium provided by the embodiment of the present disclosure has a computer program stored thereon, wherein the program is executed by a processor to implement the steps of the data transmission method applied to the packaging node or the mapping node in the embodiment of the present disclosure .

The methods disclosed in the several method embodiments provided in this application can be combined arbitrarily without conflict to obtain new method embodiments.

The features disclosed in the several product embodiments provided in this application can be combined arbitrarily without conflict to obtain new product embodiments.

The features disclosed in the several method or device embodiments provided in this application can be combined arbitrarily without conflict to obtain a new method embodiment or device embodiment.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, such as: multiple units or components can be combined, or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms. of.

The units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the embodiments of the present disclosure can be all integrated into one processing unit, or each unit can be individually used as a unit, or two or more units can be integrated into one unit; The unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

A person of ordinary skill in the art can understand that all or part of the steps in the above method embodiments can be implemented by a program instructing relevant hardware. The foregoing program can be stored in a computer readable storage medium. When the program is executed, it is executed. Including the steps of the foregoing method embodiment; and the foregoing storage medium includes: various media that can store program codes, such as a mobile storage device, ROM, RAM, magnetic disk, or optical disk.

Alternatively, if the aforementioned integrated unit of the present disclosure is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product in essence or a part that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the methods described in the various embodiments of the present disclosure. The aforementioned storage media include: removable storage devices, ROM, RAM, magnetic disks, or optical disks and other media that can store program codes.

The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present disclosure. It should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

A data transmission method, the method includes:

The encapsulation node sends a first data packet of the service flow to the mapping node, where the first data packet includes identification information and service requirement information; the identification information and the service requirement information are used by the mapping node to establish the service flow And the mapping of the communication tunnel;

After determining that the mapping node establishes the mapping between the service flow and the communication tunnel, the encapsulation node sends a second data packet to the mapping node. The second data packet includes flow identification information, and the flow identification information is A part of the identification information; the second data packet is a data packet after the first data packet of the service flow.
The method according to claim 1, wherein the determining by the encapsulation node that the mapping node establishes the mapping between the service flow and the communication tunnel comprises:

The encapsulation node starts a timer when sending the first data packet or after sending the first data packet;

When the timing of the timer expires, it is determined that the mapping node establishes the mapping between the service flow and the communication tunnel.
The method according to claim 1, wherein the determining by the encapsulation node that the mapping node establishes the mapping between the service flow and the communication tunnel comprises:

The encapsulation node receives the notification information sent by the mapping node, and determines, based on the notification information, that the mapping node establishes the mapping between the service flow and the communication tunnel.
The method according to claim 3, wherein the receiving, by the encapsulating node, the notification information sent by the mapping node comprises:

The encapsulation node receives the notification information sent by the mapping node through an Internet Control Information Protocol version 6 ICMPv6 message; a specific field in the data field in the ICMPv6 message is used to indicate the notification information.
The method according to any one of claims 1 to 4, wherein the sending a second data packet to the mapping node comprises:

The encapsulation node sends a second data packet in an application-aware network APN format to the mapping node; a specific field of the second data packet in the APN format includes the flow identification information.
The method according to any one of claims 1 to 4, wherein the sending a second data packet to the mapping node comprises:

The encapsulation node sends a second data packet to the mapping node through an Internet Protocol version 6 IPv6 data packet; the bits of the specific field of the IPv6 data packet correspond to the flow identification information.
A data transmission method, the method includes:

The mapping node receives the first data packet of the service flow sent by the encapsulation node, where the first data packet includes identification information and service requirement information;

The mapping node establishes a mapping between the service flow and the communication tunnel based on at least the identification information and the service requirement information, and forwards the first data packet through the communication tunnel;

The mapping node receives a second data packet sent by the encapsulation node, the second data packet includes flow identification information; the flow identification information is a part of the identification information; the second data packet is the A data packet after the first data packet of the service flow;

The mapping node determines the corresponding communication tunnel based on at least the flow identification information and the mapping, and forwards the second data packet through the communication tunnel.
The method according to claim 7, wherein the mapping node establishing the mapping of the service flow and the communication tunnel based on at least the identification information and the service requirement information comprises:

The mapping node extracts the flow identification information in the identification information, and obtains the source node information of the first data packet;

Create or select a communication tunnel that meets the business demand information;

Establishing a mapping between the source node information, the flow identification information, and the communication tunnel;

The determining, by the mapping node, at least the corresponding communication tunnel based on the flow identification information and the mapping includes:

The mapping node determines the communication tunnel corresponding to the flow identification information and the source node information based on the mapping.
The method according to claim 7, wherein before the mapping node receives the second data packet sent by the encapsulation node, the method further comprises:

The mapping node sends notification information to the encapsulation node, where the notification information is used to notify the encapsulation node that the mapping between the service flow and the communication tunnel has been established; the notification information establishes the service flow at the mapping node After mapping with the communication tunnel, it is sent.
The method according to claim 9, wherein the sending of notification information by the mapping node to the encapsulation node comprises:

The mapping node sends notification information to the encapsulation node through an ICMPv6 message, and a specific field in a data field in the ICMPv6 message is used to indicate the notification information.
The method according to any one of claims 7 to 10, wherein the receiving of the second data packet sent by the encapsulating node by the mapping node comprises:

The mapping node receives the second data packet in the APN format sent by the encapsulation node; the specific field of the second data packet in the APN format includes the flow identification information.
The method according to any one of claims 7 to 10, wherein the receiving of the second data packet sent by the encapsulating node by the mapping node comprises:

The mapping node receives the second data packet sent by the encapsulation node through an IPv6 data packet; at least some bits of a specific field of the IPv6 data packet correspond to the flow identification information.
An encapsulation node, the encapsulation node includes: a first communication unit and a first processing unit; wherein,

The first communication unit is configured to send a first data packet of a service flow to a mapping node, where the first data packet includes identification information and service requirement information; the identification information and the service requirement information are used in the A mapping node establishes a mapping between the service flow and the communication tunnel;

The first processing unit is configured to determine whether the mapping node establishes a mapping between the service flow and the communication tunnel;

The first communication unit is further configured to send a second data packet to the mapping node after the first processing unit determines that the mapping node establishes the mapping between the service flow and the communication tunnel, and the second data packet The flow identification information is included in the flow identification information, and the flow identification information is a part of the identification information; the second data packet is a data packet of the service flow after the first data packet.
The encapsulation node according to claim 13, wherein the first processing unit is configured to start a timer when the first communication unit sends the first data packet or after the first data packet is sent ; When the timing of the timer expires, it is determined that the mapping node establishes the mapping of the service flow and the communication tunnel.
The encapsulation node according to claim 13, wherein the first processing unit is configured to receive notification information sent by the mapping node through the first communication unit, and determine based on the notification information that the mapping node establishes the The mapping between the service flow and the communication tunnel is described.
The encapsulation node according to claim 15, wherein the first processing unit is configured to receive notification information sent by the mapping node through an ICMPv6 message; a specific field in the data field in the ICMPv6 message is used for Indicates the notification information.
The encapsulation node according to any one of claims 13 to 16, wherein the first communication unit is configured to send a second data packet in APN format to the mapping node; The specific field includes the stream identification information.
The encapsulation node according to any one of claims 13 to 16, wherein the first communication unit is configured to send a second data packet to the mapping node through an IPv6 data packet; The bits correspond to the stream identification information.
A mapping node, the mapping node includes: a second communication unit and a second processing unit; wherein,

The second communication unit is configured to receive a first data packet of a service flow sent by an encapsulation node, where the first data packet includes identification information and service requirement information;

The second processing unit is configured to establish a mapping between the service flow and the communication tunnel based on at least the identification information and the service requirement information;

The second communication unit is further configured to forward the first data packet through the communication tunnel; and further configured to receive a second data packet sent by the encapsulation node, the second data packet including flow identification information; The flow identification information is a part of the identification information; the second data packet is a data packet of the service flow after the first data packet;

The second processing unit is further configured to determine the corresponding communication tunnel based on at least the flow identification information and the mapping;

The second communication unit is further configured to forward the second data packet through the communication tunnel.
The mapping node according to claim 19, wherein the second processing unit is configured to extract the flow identification information in the identification information, and obtain the source node information of the first data packet; create or select A communication tunnel that satisfies the service requirement information; establishes the source node information, the flow identification information, and a mapping with the communication tunnel; and is further configured to determine the flow identification information and the source node information based on the mapping The corresponding communication tunnel.
The mapping node according to claim 19, wherein the second communication unit is further configured to send notification information to the encapsulation node before receiving the second data packet sent by the encapsulation node, and the notification information is used for Notifying the encapsulation node that the mapping between the service flow and the communication tunnel has been established; the notification information is sent after the mapping node has established the mapping between the service flow and the communication tunnel.
The mapping node according to claim 21, wherein the second communication unit is configured to send notification information to the encapsulation node through an ICMPv6 message, and a specific field in a data field in the ICMPv6 message is used to indicate The notification information.
The mapping node according to any one of claims 19 to 22, wherein the second communication unit is configured to receive a second data packet in the APN format sent by the encapsulation node; the second data packet in the APN format The specific field of includes the stream identification information.
The mapping node according to any one of claims 19 to 22, wherein the second communication unit is configured to receive a second data packet sent by the encapsulation node through an IPv6 data packet; a specific field of the IPv6 data packet At least part of the bits corresponds to the stream identification information.
A computer-readable storage medium with a computer program stored thereon, which implements the steps of any one of claims 1 to 6 when the program is executed by a processor; or, implements claim 7 when the program is executed by a processor To the steps of any one of the methods described in 12.
A node comprising a memory, a processor, and a computer program stored on the memory and running on the processor, and the processor implements the steps of the method according to any one of claims 1 to 6 when the processor executes the program; or , When the processor executes the program, the steps of the method according to any one of claims 7 to 12 are implemented.