CN114765591B

CN114765591B - Data transmission method, device and storage medium

Info

Publication number: CN114765591B
Application number: CN202011632077.2A
Authority: CN
Inventors: 程志密; 胡渭琦; 孙万飞
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2023-07-18
Anticipated expiration: 2040-12-31
Also published as: CN114765591A

Abstract

The embodiment of the application provides a data transmission method, a data transmission device and a storage medium, wherein the method comprises the following steps: the SMF determines a main user plane connection path and a standby user plane connection path which are not intersected based on a main-standby relation between main receiving equipment and standby receiving equipment; only sending corresponding first message processing logic to each first forwarding device on the main user plane connection path, or simultaneously sending corresponding second message processing logic to each first forwarding device on the main user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path; and the forwarding equipment which exists on the main user plane connection path and the standby user plane connection path simultaneously is public forwarding equipment, and message processing logic on the public forwarding equipment is used for indicating data transmission through the main user plane connection path. The embodiment of the application improves the utilization rate of network resources.

Description

Data transmission method, device and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and storage medium.

Background

In some application scenarios, such as border or weather reconnaissance, where a large number of sensor nodes need to be deployed to collect data, the transmission of such important data requires high reliability, it is a problem how to achieve reliable data transmission to the destination. For improving reliability of data transmission, the third generation partnership project (3rd Generation Partnership Project,3GPP) protocol specification gives support for redundant transmission over the N3/N9 interface, end-to-end redundant user plane paths based on dual connectivity, and redundant transmission mechanisms at the transport layer, but these schemes can result in wastage of network resources and increased complexity of network elements (packet duplication or packet duplicate elimination).

Disclosure of Invention

The embodiment of the application provides a data transmission method, a data transmission device and a storage medium, which are used for solving the problem of network resource waste in the existing data transmission process.

In a first aspect, an embodiment of the present application provides a data transmission method, including:

the session management function SMF determines disjoint main user plane connection paths and spare user plane connection paths based on a main-spare relationship between a main receiving device and a spare receiving device which are deployed in advance;

only sending corresponding first message processing logic to each first forwarding device on the primary user plane connection path, or simultaneously sending corresponding second message processing logic to each first forwarding device on the primary user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path;

The forwarding devices existing on the primary user plane connection path and the standby user plane connection path are public forwarding devices, and message processing logic on the public forwarding devices is used for indicating data transmission through the primary user plane connection path, and the message processing logic comprises first message processing logic, second message processing logic and third message processing logic.

In a second aspect, embodiments of the present application provide an SMF comprising a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

In a third aspect, an embodiment of the present application provides a data transmission apparatus, including:

the determining module is used for determining a main user plane connection path and a standby user plane connection path which are not intersected based on a main-standby relation between a main receiving device and a standby receiving device which are deployed in advance;

the sending module is used for sending corresponding first message processing logic only to each first forwarding device on the main user plane connection path, or sending corresponding second message processing logic to each first forwarding device on the main user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path;

In a fourth aspect, embodiments of the present application provide a processor-readable storage medium storing a computer program for causing a processor to perform the method of the first aspect.

According to the data transmission method, the data transmission device and the storage medium, the corresponding first message processing logic is only sent to the first forwarding devices on the main user plane connection path, or the corresponding second message processing logic is simultaneously sent to each first forwarding device on the main user plane connection path and the corresponding third message processing logic is sent to each second forwarding device on the standby user plane connection path, and the message processing logic is used for indicating data transmission through the main user plane connection path, so that the data transmission process of a single path is realized, the simultaneous data transmission on two disjoint paths is avoided, the utilization rate of network resources is improved, and the problem of low network resource utilization rate of the existing redundancy transmission scheme is solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of steps of a data transmission method in an embodiment of the present application;

fig. 2 is a diagram of a main receiving device and a standby receiving device in the present application when they are at the same DN;

fig. 3 is a schematic diagram of the main receiving device and the standby receiving device in the present application when they are at different DNs.

Fig. 4 is a schematic structural diagram of an SMF according to an embodiment of the present application;

fig. 5 is a block diagram of a data transmission device in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the current redundant transmission of high reliability communications, to support high reliability low latency (Ultra Reliable Low Latency Communication, URLLC) services, a terminal (UE) may establish two redundant protocol data unit (Protocol Data Unit, PDU) sessions over a 5G network such that the 5G system sets the user plane paths of the two redundant PDU sessions to disjoint. The subscription of the user indicates whether the user is allowed to have redundant PDU sessions, and the indication is provided from the unified data management function (Unified Data Management, UDM) to the session management function (Session Management Function, SMF).

When redundancy is applied, one PDU session is connected from the terminal to the user plane function (User Plane Function, UPF 1) acting as PDU session anchor via the primary radio access network (wireless access network, RAN), and the other PDU session is connected from the terminal to UPF2 acting as PDU session anchor via the secondary RAN. As described in TS 37.340, the NG-RAN may implement redundant user plane resources (i.e., primary NG-RAN and secondary NG-RAN) or a single NG-RAN node for a PDU session having two NG-RAN nodes. In both cases there is an N1 interface for access and mobility management functions (AMFs).

Based on the two PDU sessions, two independent user plane paths are established. UPF1 and UPF2 are connected to the same Data Network (DN), i.e., traffic passing through UPF1 and UPF2 may be routed through different user plane nodes within the DN.

In order to establish two redundant PDU sessions and associate repeated traffic from the same application with these PDU sessions, a UE routing policy (UE Route Selection Policy, urs p) or UE local configuration is used, as specified in TS 23.503.

In addition, the redundant user plane settings are applicable to IP and ethernet PDU sessions.

However, a high reliability communication scheme that uses a redundant transmission mechanism (transmitting data simultaneously on two disjoint paths) to achieve data transmission may result in network resource waste, and may also increase the complexity of the network element (RAN or UPF), including duplication of a message to be processed or elimination of a duplicate message.

Therefore, the embodiment of the application provides a data transmission method, a data transmission device and a storage medium, so as to solve the problem of network resource waste caused by the existing transmission scheme.

The method and the device are based on the same application, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and the embodiments of the present application are not limited. Since the terminal device forms a communication-capable network together with other network devices, such as core network devices, access network devices (i.e. base stations), the terminal device is also regarded as a network device in the present invention.

Furthermore, it is to be understood that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The present application is specifically described below.

As shown in fig. 1, a flowchart of steps of a data transmission method in an embodiment of the present application is shown, where the method includes the following steps:

step 101: the SMF determines disjoint primary and backup user plane connection paths based on a primary-backup relationship between a pre-deployed primary and backup receiving device.

Specifically, when the terminal initiates a session establishment request to the pre-deployed primary receiving device and the standby receiving device, and the SMF receives the session establishment request, the SMF may perform user plane selection based on the primary-standby relationship between the primary receiving device and the standby receiving device, and select two disjoint primary user plane connection paths and two disjoint standby user plane connection paths, that is, the primary-standby path where N9/N6 is disjoint.

The primary-backup relationship between the primary and backup receiving devices may be configured by a network administrator or by a network policy or the like.

In addition, two sessions initiated by the terminal adopt the same session IP, namely, the data transmitted to the main receiving device and the standby receiving device are ensured to be the same data.

In addition, the public forwarding equipment exists in the main user plane connection path and the standby user plane connection path, and the forwarding equipment existing on the main user plane connection path and the standby user plane connection path is the public forwarding equipment, so that when data arrives on the public forwarding equipment of the main user connection path and the standby user plane connection path, the public forwarding equipment can determine which path is used for transmitting the data based on message processing logic, and further the data transmission process of a single path can be realized.

Specifically, the common forwarding device may be a common endpoint device of the primary user plane connection path and the backup user plane connection path.

Step 102: and sending corresponding first message processing logic only to each first forwarding device on the main user plane connection path, or simultaneously sending corresponding second message processing logic to each first forwarding device on the main user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path.

Specifically, the message processing logic on the public forwarding device is configured to instruct data transmission through the primary user plane connection path, where the message processing logic includes a first message processing logic, a second message processing logic, and a third message processing logic.

Specifically, since each forwarding device is different, each forwarding device has its own message processing logic, so that each forwarding device can perform data transmission based on its own message processing logic, and the forwarding device includes a first forwarding device and a second forwarding device, and the forwarding device may be a UPF or a PDU session anchor Point (PSA).

Specifically, only sending the corresponding first message processing logic to each first forwarding device is relative to other message processing logic, and no limitation is imposed on other information sent to the first forwarding device.

In addition, the message processing logic on the public forwarding device indicates to perform data transmission through the main user plane connection path, so that the public forwarding device can perform data transmission through the main user plane connection path when performing data transmission according to the message processing logic, the data transmission only through the main user plane connection path in the data transmission process is realized, the data transmission through the standby user plane connection path in a redundant manner is avoided, the data transmission on two disjoint paths is avoided, the utilization rate of network resources is improved, and the complex processing such as copying or eliminating is not performed on the data message through the system network element, so that the realization complexity of the system network element is reduced.

In this way, in this embodiment, by sending only the corresponding first message processing logic to the first forwarding devices on the primary user plane connection path, or sending the corresponding second message processing logic to each first forwarding device on the primary user plane connection path and sending the corresponding third message processing logic to each second forwarding device on the standby user plane connection path, the primary user connection path and the standby user plane connection path have a common forwarding device, and the message processing logic on the common forwarding device is used for indicating data transmission through the primary user plane connection path, so that a transmission process of data by a single path is realized, simultaneous data transmission on two disjoint paths is avoided, the utilization rate of network resources is improved, and the problem of low network resource utilization rate in the existing redundancy transmission scheme is solved.

Alternatively, in this embodiment, the corresponding first message processing logic may be sent to each first forwarding device, or the corresponding second message processing logic may be sent to each first forwarding device and the corresponding third message processing logic may be sent to each second forwarding device at the same time by a Software Defined Network (SDN) controller. That is, the SMF may first issue the message handling logic to the SDN controller, and then issue the message handling logic to the corresponding forwarding device by the SDN controller.

Optionally, in this embodiment, the first message processing logic includes a source IP address or a destination IP address of the data to be transmitted, an output port of the data to be transmitted, and a priority of the first message processing logic.

Specifically, when uplink transmission is performed, the first message processing logic may include a source IP address of data to be transmitted, and when downlink transmission is performed, the first message processing logic may include a destination IP address of data to be transmitted. Of course, both the source IP address and the destination IP address are session IP addresses.

For any one of the first forwarding devices, when the data to be transmitted reaches the first forwarding device, in the first message logic corresponding to the first forwarding device, the output port of the data to be transmitted is the output port of the first forwarding device.

In addition, the present embodiment is not limited herein specifically to the priority of the first message processing logic. Specifically, the SMF only sends the corresponding first message processing logic to each first forwarding device on the primary user plane connection path, and does not send the message processing logic to the second forwarding devices on the standby user plane connection path, so that the common forwarding devices (the first forwarding devices and the second forwarding devices) of the primary user plane connection path and the standby user plane connection path can only transmit data through the first message processing logic, thereby realizing that the data can only be transmitted through the primary user plane connection path, and therefore, in the first message processing logic, the priority of the first message processing logic can be not limited, i.e. the priority of the first message processing logic can be null, higher or lower than the priority of other message processing logic, and the first message processing logic is not limited herein.

The second message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted and the priority of the second message processing logic, and on each first forwarding device or the public forwarding device, the priority of the second message processing logic is higher than the priority of the third message processing logic;

the third message processing logic includes a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted, and a priority of the third message processing logic, where, on each of the second forwarding devices or the common forwarding device, the priority of the second message processing logic is higher than the priority of the third message processing logic.

Specifically, when uplink transmission is performed, the second message processing logic and the third message processing logic may include source IP addresses of data to be transmitted, and when downlink transmission is performed, the second message processing logic and the third message processing logic may include destination IP addresses of data to be transmitted.

For any one of the second forwarding devices, when the data to be transmitted reaches the second forwarding device, in the third message processing logic corresponding to the second forwarding device, the output port of the data to be transmitted is the output port of the second forwarding device.

In addition, by setting the priority of the second message processing logic higher than the priority of the third message processing logic on each first forwarding device and each second forwarding device, data transmission through the second message processing logic can be selected based on the priority on the common forwarding device (the first forwarding device and the second forwarding device at the same time) of the main user plane connection path and the standby user plane connection path, so that data transmission through the main user plane connection path is realized.

Of course, the used message processing logic and thus the selected data transmission path can be determined based on the common forwarding device of the primary user plane connection path and the standby user plane connection path, so that the priority of the second message processing logic is higher than that of the third message processing logic only on the common forwarding device, thereby ensuring that data transmission is performed through the primary user plane connection path without setting the priorities of the second message processing logic and the third message processing logic on other first forwarding devices and second forwarding devices.

Further, optionally, in this embodiment, when a failure of the primary user plane connection path is detected, the control data transmission path is switched from the primary user plane connection path to the backup user plane connection path, so as to implement a high reliability data transmission process.

The procedure of switching the data transmission path from the primary user plane connection path to the backup user plane connection path will be described.

In the first case, when only the corresponding first message processing logic is sent to each first forwarding device on the primary user plane connection path:

at this time, when the control data transmission path is switched from the primary user plane connection path to the standby user plane connection path, any one of the following modes may be included:

firstly, sending a corresponding fourth message processing logic to each second forwarding device on the standby user plane connection path, wherein the fourth message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted and the priority of the fourth message processing logic, and on each second forwarding device or the public forwarding device, the priority of the fourth message processing logic is higher than that of the first message processing logic.

Specifically, the fourth message processing logic includes a source IP address or a destination IP address of the data to be transmitted and an output port of the data to be transmitted, so that the second forwarding device that receives the fourth message processing logic can transmit the data based on the IP address and the output port.

In addition, specifically, the priority of the fourth message processing logic is set to be higher than that of the first message processing logic on each second forwarding device, so that data transmission can be performed through the fourth message processing logic on the basis of the priority selection on the public forwarding device of the main user plane connection path and the standby user plane connection path, data transmission can be performed through the standby user plane connection path, and further the conversion process from the main user plane connection path to the standby user plane connection path is realized.

Of course, the used message processing logic and thus the selected data transmission path can be determined based on the common forwarding device of the primary user plane connection path and the standby user plane connection path, so that the priority of the fourth message processing logic can be set higher than that of the first message processing logic only on the common forwarding device, thereby ensuring that the data transmission is performed through the standby user plane connection path without setting the priority of the fourth message processing logic on other second forwarding devices.

And secondly, sending a corresponding fifth message processing logic to each second forwarding device on the standby user plane connection path, and deleting all the first message processing logic or the first message processing logic of the public forwarding device on the main user plane connection path.

The fifth message processing logic comprises a source IP address or a destination IP address of the data to be transmitted, an output port of the data to be transmitted and a priority of the fifth message processing logic.

Specifically, when the SMF sends the corresponding fifth message processing logic to each second forwarding device on the backup user plane connection path, all the first message processing logic on the primary user plane connection path is deleted, that is, the first message processing logic on the common forwarding device of the primary user connection path and the backup user plane connection path is deleted, so that the common forwarding device can only perform data transmission through the fifth message processing logic, and data transmission through the backup user plane connection path is realized, therefore, the priority of the fifth message processing logic may not be limited at this time, that is, no matter whether the priority of the fifth message processing logic is null, higher than or lower than the priority of the first message processing logic, and the method is not limited specifically herein.

For the reasons described above, only the first message processing logic of the common forwarding device may be deleted, without deleting the first message processing logic on the other first forwarding devices, so that the common forwarding device may only perform data transmission through the fifth message processing logic, thereby implementing data transmission through the connection path of the standby user plane, and at this time, the priority of the fifth message processing logic may not be limited.

Second case: when sending corresponding second message processing logic to each first forwarding device on the main user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path simultaneously:

at this time, when the control data transmission path is switched from the primary user plane connection path to the standby user plane connection path, all the first message processing logic or the first message processing logic of the public forwarding device on the primary user plane connection path may be deleted.

Specifically, because the corresponding third message processing logic is sent to each second forwarding device on the standby user plane connection path, when the main user plane connection path fails, all the first message processing logic on the main user plane connection path is deleted, namely, the first message processing logic on the common forwarding device of the main user plane connection path and the standby user plane connection path is deleted at the same time, so that when the data to be transmitted reaches the common forwarding device in the main user plane connection path and the standby user plane connection path, the data transmission can only be performed through the second message processing logic, and the data transmission path is converted from the main user plane connection path to the standby user plane connection path.

Similarly, the SMF deletes the first message processing logic of the common forwarding device in the primary user plane connection path and the standby user plane connection path, so that data transmission can be performed only through the second message processing logic corresponding to the common forwarding device, and the common forwarding device is endpoint equipment of the primary user plane connection path and the standby user plane connection path, thereby realizing that the data transmission path is converted from the primary user plane connection path to the standby user plane connection path.

In this way, the switching process of the data transmission path from the main user plane connection path to the standby user plane connection path is realized in any mode.

It should also be noted that, to ensure that the terminal can successfully send and receive data to and from the standby receiving device after the data transmission path is switched, the SMF may operate on the message processing logic configured on the second forwarding on the standby user plane connection path so that the destination address (including, but not limited to, the IP address and the MAC address) of the message is correct. That is, the SMF may operate the third message processing logic, the fourth message processing logic, or the fifth message processing logic, and modify the destination address of the data to be transmitted to an address capable of enabling the receiving device to correctly receive the data.

Specifically, in uplink transmission, the destination address of the data to be transmitted is the address of the standby receiving device, and in downlink transmission, the destination address of the data to be transmitted is the address of the terminal.

By modifying the destination address of the data to be transmitted, the terminal does not need to carry out adaptive work after the destination receiving equipment is replaced, and the implementation complexity of the terminal is reduced.

The present application is illustrated by the following specific examples.

As shown in fig. 2 and 3, fig. 2 is an architecture diagram of a primary receiving device and a secondary receiving device on the same DN, and fig. 3 is an architecture diagram of a primary receiving device and a secondary receiving device on different DNs.

In fig. 2 and 3, the forwarding device 1 and the forwarding device 2 constitute a primary user plane connection path, and the forwarding device 1 and the forwarding device 3 constitute a backup user plane connection path. The SMF sends corresponding message handling logic to each forwarding device (forwarding device 1, forwarding device 2, and forwarding device 3) on the primary and backup user plane connection paths through the SDN controller.

The forwarding device 1 is a common forwarding device (both a first forwarding device and a second forwarding device) for the primary user plane connection path and the backup user plane connection path. In the connection path of the main user plane, the output port numbers of the first forwarding device and the second forwarding device are both 2 in uplink transmission, and the output port numbers of the first forwarding device and the second forwarding device are both 1 in downlink transmission; in the backup user interface connection path, the output port number of the first forwarding device is 3 during uplink transmission, the output port number of the third forwarding device is 4, the output port number of the third forwarding device is 2 during downlink transmission, and the output port number of the first forwarding device is 1.

In addition, in the main user plane connection path and the standby user plane connection path, the public forwarding equipment close to the RAN is RAN side forwarding equipment, the first forwarding equipment close to the DN is DN side forwarding equipment, and the second forwarding equipment close to the DN is DN side forwarding equipment; that is, in fig. 2 and 3, the forwarding device 1 is a RAN-side forwarding device, and the forwarding device 2 and the forwarding device 3 are DN-side forwarding devices. Of course, if there are other forwarding devices between the forwarding device 1 and the forwarding device 2 and between the forwarding device 1 and the forwarding device 3, this is an intermediate forwarding device.

Setting the IP of a message of the UE as IP1 and the MAC address as MAC1; the MAC address of the main receiving device is MAC11, and the IP address is IP11; the MAC address of the receiving device is MAC12, and the IP address is IP12.

When the UE sends a data message, it first arrives at the forwarding device 1 through the RAN, and path selection is performed by the forwarding device 1 based on the message processing logic.

The first embodiment simultaneously sends corresponding second message processing logic to each first forwarding device on the primary user plane connection path and sends corresponding third message processing logic to each second forwarding device on the standby user plane connection path:

after the SMF receives the session establishment request of the UE, the SMF executes the main-standby path establishment according to the main-standby relation of the receiving equipment. The SMF performs the selection of the primary and backup user plane connection paths and assigns an IP address (this IP address may also be obtained from the UDM, statically configured) to the UE and issues message processing logic on the primary and backup paths.

Example 1.1: and the SMF simultaneously transmits corresponding message processing logic to the main user plane connection path and the standby user plane connection path, and the forwarding equipment on the RAN side on the standby user plane connection path modifies the destination address.

On the connection path of the main user plane, for all forwarding devices on the user plane, the uplink message processing logic is as follows in table 1:

TABLE 1

Match	Priority level	Actions
			Source IP Address (Session IP Address)	A	Output to port x

On the connection path of the main user plane, for all forwarding devices on the user plane, the downlink message processing logic is as follows in table 2:

TABLE 2

Match	Priority level	Actions
			Destination IP address (session IP address)	A	Output to port y

On the connection path of the standby user plane, for the intermediate forwarding device on the user plane, the uplink message processing logic is as follows in table 3:

TABLE 3 Table 3

On the connection path of the standby user plane, for the intermediate forwarding device on the user plane, the downlink message processing logic is as follows in table 4:

TABLE 4 Table 4

Match	Priority level	Actions
			Destination IP address (session IP address)	B (less than A)	Output to port y

On the connection path of the standby user plane, the modification of the destination address is performed on the uplink message processing logic by the RAN-side forwarding device (forwarding device 1 in fig. 2 and 3), and the procedure is as follows in table 5:

TABLE 5

On the connection path of the standby user plane, the downlink message processing logic is modified by the RAN side forwarding device, and the process is as shown in the following table 6:

TABLE 6

The SDN controller may learn the MAC address of the receiving device, and may be obtained through ARP learning, or may be obtained through MAC learning, or in other manners, which is not specifically limited herein.

Specifically, the above message processing logic is specifically applied to fig. 2 and fig. 3, where, at the forwarding device 1, for uplink transmission of the primary user plane connection path, the message processing logic is: priority level: a, match: source IP1, actions: output:2; for the downlink transmission of the main user plane connection path, the message processing logic is as follows: priority level: a, match: destination IP1, actions: output:1, a step of; for uplink transmission of the backup user plane connection path, the message processing logic is as follows: priority level: b, match: source IP1, actions: IP11- > IP12, MAC11- > MAC12, actions: output:3, a step of; for the downlink transmission of the backup user plane connection path, the message processing logic is as follows: priority level: b, match: destination IP1, actions: IP12- > IP11, MAC12- > MAC11, actions: output:1.

at the forwarding device 2, for uplink transmission of the primary user plane connection path, the message processing logic is: priority level: a, match: source IP1, actions: output:2; for the downlink transmission of the main user plane connection path, the message processing logic is as follows: priority level: a, match: destination IP1, actions: output:1.

At the forwarding device 3, for uplink transmission of the connection path of the standby user plane, the message processing logic is as follows: priority level: b, match: source IP1, actions: output:4, a step of; for the downlink transmission of the backup user plane connection path, the message processing logic is as follows: priority level: b, match: destination IP1, actions: output:2.

example 1.2: the SMF simultaneously issues corresponding message processing logic to the primary and backup user plane connection paths, and the DN side forwarding device (e.g., forwarding device 3 in fig. 2 and 3) on the backup user plane connection path modifies the destination address.

On the connection path of the main user plane, for all forwarding devices on the user plane, the uplink message processing logic is shown in the table 1; on the connection path of the main user plane, for all forwarding devices on the user plane, the downlink message processing logic is as shown in table 2 above.

On the connection path of the standby user plane, aiming at the RAN side forwarding equipment on the user plane and other forwarding equipment (other forwarding equipment comprises DN side forwarding equipment and intermediate forwarding equipment between the RAN side forwarding equipment and the DN side forwarding equipment), the uplink message processing logic is shown in the table 3; on the connection path of the standby user plane, the downlink message processing logic is shown in the table 4 above for the RAN-side forwarding device on the user plane and other forwarding devices on the user plane.

On the connection path of the standby user plane, the uplink message processing logic is modified by DN side forwarding equipment, and the process is as shown in the table 5; on the connection path of the standby user plane, the downstream message processing logic is modified by the DN side forwarding device, and the process is as shown in the table 6.

Specifically, the above message processing logic is specifically applied to fig. 2 and 3, and is specifically shown in the above embodiment 1.1, and will not be described in detail herein.

It should be noted that, of course, the modification of the destination address may also be performed on the uplink packet processing logic and the downlink packet processing logic by the intermediate forwarding device between the RAN-side forwarding device and the DN-side forwarding device of the connection path of the standby user plane, as shown in the above tables 5 and 6.

In a second embodiment, when the SMF issues message processing logic of the primary user plane connection path and the standby user plane connection path simultaneously, the primary user plane connection path is selected to switch to the standby user plane connection path:

specifically, the SDN controller reports topology information of the bottom forwarding device at regular and irregular times, and the SMF determines the related path according to the received topology information. When the primary user plane connection path fails, the SMF initiates a transition from the primary user plane connection path to the backup user plane connection path. The specific conversion method comprises the following steps: the SMF issues and deletes the message processing logic on the main user plane connection path to the SDN controller; after receiving the instruction, the SDN controller sends an instruction for deleting the message processing logic to the related forwarding equipment. The two conditions are: one is to delete all message processing logic on the primary user plane connection path; and the other is deleting the message processing logic corresponding to the main user plane connection path on the public forwarding equipment.

Example 2.1: when the SMF selects to switch from the primary user plane connection path to the backup user plane connection path, the SMF deletes all message processing logic on the primary user plane connection path.

In particular, in fig. 2 and fig. 3, the message processing logic corresponding to the primary user plane connection path on the forwarding device 1 and the forwarding device 2, that is, the second message processing logic, is deleted, so that the forwarding device 1 can only perform data transmission through the remaining third message processing logic, and a conversion process from the primary user plane connection path to the standby user plane connection path is realized.

Example 2.2: when the SMF selects to switch from the main user interface connection path to the standby user interface connection path, the SMF deletes the message processing logic corresponding to the main user interface connection path of the public forwarding equipment.

In particular, in fig. 2 and fig. 3, the message processing logic corresponding to the primary user plane connection path on the forwarding device 1, that is, the second message processing logic, is deleted, so that the forwarding device 1 can only perform data transmission through the remaining third message processing logic, and a conversion process from the primary user plane connection path to the standby user plane connection path is realized.

Third embodiment: the SMF only issues the message processing logic of the primary user plane connection path:

After the SMF receives the session establishment request of the UE, the SMF executes the main-standby path establishment according to the main-standby relation of the receiving equipment. The SMF performs the primary and backup path selection and assigns an IP address (this IP address may also be obtained from the UDM, statically configured) to the UE and issues message processing logic on the primary path. And after receiving the message processing logic on the main path, the SDN controller issues the message processing logic.

For the uplink transmission of the main user plane connection path, the message processing logic of all forwarding devices on the user plane is shown in the table 1; for the downlink transmission of the connection path of the main user plane, the message processing logic of all forwarding devices on the user plane is shown in table 2 above.

In fig. 2 and fig. 3, the specific message processing logic of the primary user plane connection paths of the forwarding device 1 and the forwarding device 2 is described with reference to the first embodiment, and will not be described in detail herein.

It should be noted that, the SMF only issues the message processing logic of the primary user plane connection path, and at this time, the common forwarding device can only perform data transmission through the message processing logic of the primary user plane connection path, so the message processing logic of the primary user plane connection path is not limited to the priority.

Fourth embodiment: when SMF only issues message processing logic of the main user interface connection path, the main user interface connection path is selected to be converted into the standby user interface connection path:

the SDN controller reports topology information of the bottom forwarding device regularly and irregularly, and the SMF judges the related path according to the received topology information. When the primary path fails, the SMF initiates a transition from the primary path to the backup path: message processing logic on the backup path is issued to the SDN controller; after receiving the instruction, the SDN controller transmits message processing logic to the forwarding equipment on the standby path, wherein the priority of the message processing logic is higher than that of the message processing logic on the main path.

Example 4.1: the modification of the destination address is performed by the RAN-side forwarding device on the backup subscriber plane connection path and the SMF performs the transition from the primary subscriber plane connection path to the backup subscriber plane connection path.

On the backup user plane connection path, for the intermediate forwarding device on the user plane, the uplink message processing logic is as follows in table 7:

TABLE 7

Match	Priority level	Actions
			Source IP Address (Session IP Address)	C (greater than A)	Output to port x

On the connection path of the standby user plane, for the intermediate forwarding device on the user plane, the downlink message processing logic is as follows in table 8:

TABLE 8

Match	Priority level	Actions
			Destination IP address (session IP address)	C (greater than A)	Output to port y

On the connection path of the standby user plane, the modification of the destination address is carried out on the uplink message processing logic through the RAN side forwarding equipment, and the process is as shown in the following table 9:

TABLE 9

On the connection path of the standby user plane, the modification of the destination address is carried out on the downlink message processing logic through the RAN side forwarding equipment, and the process is as shown in the following table 10:

table 10

In fig. 2 and fig. 3, for the connection path of the standby user plane, at the forwarding device 1, the message processing logic during uplink transmission is: priority level: c, match: source IP1, actions: IP11- > IP12, MAC11- > MAC12, actions: output:3, a step of; the message processing logic during downlink transmission is as follows: priority level: c, match: destination IP1, actions: IP12- > IP11, MAC12- > MAC11, actions: output:1. at the forwarding device 3, the message processing logic during uplink transmission is as follows: priority level: c, match: source IP1, actions: output:4, a step of; the message processing logic during downlink transmission is as follows: priority level: c, match: destination IP1, actions: output:2.

example 4.2: the destination address is modified by the DN-side forwarding device on the backup subscriber plane connection path and the SMF performs the transition from the primary subscriber plane connection path to the backup subscriber plane connection path.

On the standby user plane connection path, for forwarding devices on the user plane (RAN side forwarding devices and other forwarding devices on the user plane), the uplink message processing logic is as shown in table 7; on the standby user plane connection path, the downlink message processing logic is shown in table 8 above for forwarding devices on the user plane (RAN side forwarding device and other forwarding devices on the user plane).

On the connection path of the standby user plane, the processing logic of the uplink message is modified by the DN side forwarding equipment on the user plane, and the process is shown in the table 9; on the connection path of the standby user plane, the downstream message processing logic is modified by the DN side forwarding device on the user plane, and the process is as shown in the table 10.

Fifth embodiment: when SMF only issues message processing logic of the main user interface connection path, the main user interface connection path is selected to be converted into the standby user interface connection path:

the SDN controller reports topology information of the bottom forwarding device regularly and irregularly, and the SMF judges the related path according to the received topology information. When the primary path fails, the SMF initiates a transition from the primary to the backup subscriber plane connection path: message processing logic on the backup user plane connection path and message processing logic for deleting part or all of the primary user plane connection path are issued to the SDN controller; after receiving the instruction, the SDN controller issues message processing logic to the forwarding equipment on the standby user plane connection path, and deletes part or all of the message processing logic on the forwarding equipment on the main user plane connection path. The two conditions are: one is to delete all message processing logic on the primary user plane connection path; the other is the deletion of the message processing logic of the common forwarding device.

Example 5.1: issuing message processing logic on the standby user plane connection path and deleting all message processing logic on the main user plane connection path:

example 5.1.1: after receiving the instruction, the SDN controller transmits message processing logic to the forwarding equipment on the standby user plane connection path, the priority of the message processing logic is not required, and the forwarding equipment at the RAN side modifies the destination address.

On the backup user plane connection path, for all forwarding devices on the user plane, the uplink message processing logic is as follows in table 11:

TABLE 11

On the backup user plane connection path, for all forwarding devices on the user plane, the downlink message processing logic is as follows in table 12:

table 12

On the connection path of the standby user plane, the modification of the destination address is performed on the uplink message processing logic by the RAN side forwarding device, and the process is as shown in the following table 13:

TABLE 13

On the connection path of the standby user plane, the modification of the destination address is performed on the downlink message processing logic by the RAN side forwarding device, and the process is as shown in the following table 14:

TABLE 14

Specifically, as applied to fig. 2 and 3, the message processing logic of the primary user plane connection path on the forwarding device 1 and the message processing logic on the forwarding device 2 are deleted.

Example 5.1.2: after receiving the instruction, the SDN controller transmits message processing logic to the forwarding equipment on the standby user plane connection path, the priority of the message processing logic is not required, and the DN side forwarding equipment modifies the destination address.

On the standby user plane connection path, for the forwarding device on the user plane, the uplink message processing logic is shown in the above table 11; on the connection path of the standby user plane, the downlink message processing logic is shown in the table 12 above for the forwarding device on the user plane.

On the connection path of the standby user plane, the processing logic of the uplink message is modified by the DN side forwarding equipment on the user plane, and the process is shown in the table 13; on the connection path of the standby user plane, the downstream message processing logic is modified by the DN-side forwarding device on the user plane, and the process is as shown in the table 14.

Example 5.2: and transmitting the message processing logic on the standby user plane connection path and deleting the message processing logic of the public forwarding equipment:

example 5.2.1: after receiving the instruction, the SDN controller transmits message processing logic to the forwarding equipment on the standby user plane connection path, the priority of the message processing logic is not required, and the RAN side forwarding equipment on the standby user plane connection path modifies the destination address.

On the backup user plane connection path, for all forwarding devices on the user plane, the uplink message processing logic is as follows in table 15:

TABLE 15

On the backup user plane connection path, for all forwarding devices on the user plane, the downlink message processing logic is as follows in table 16:

table 16

On the connection path of the standby user plane, the modification of the destination address is performed on the uplink message processing logic by the RAN side forwarding device, and the process is as shown in the following table 17:

TABLE 17

On the connection path of the standby user plane, the modification of the destination address is performed on the downlink message processing logic by the RAN-side forwarding device, and the process is as shown in the following table 18:

TABLE 18

When the method is applied to fig. 2 and 3, the message processing logic of the main user plane connection path on the forwarding device 1 is deleted, so that the forwarding device 1 can only perform data transmission through the message processing logic of the standby user plane connection path, and the conversion process of the data transmission path is realized.

Example 5.2.2: after receiving the instruction, the SDN controller transmits message processing logic to forwarding equipment on the standby user plane connection path, the priority of the message processing logic is not required, and the DN side forwarding equipment on the standby user plane connection path modifies the destination address.

On the standby user plane connection path, for the forwarding device on the user plane, the uplink message processing logic is shown in the table 15; on the connection path of the standby user plane, the downlink message processing logic is shown in the table 16 above for the forwarding device on the user plane.

On the connection path of the standby user plane, the processing logic of the uplink message is modified by the DN side forwarding equipment on the user plane, and the process is shown in the table 17; on the connection path of the standby user plane, the downstream message processing logic is modified by the DN side forwarding device on the user plane, and the process is as shown in table 18.

Through any of the embodiments, the issuing of the message processing logic and the path change are realized.

Fig. 4 is a schematic structural diagram of an SMF according to an embodiment of the present application, including a memory 420, a transceiver 400, and a processor 410.

Wherein in fig. 4, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 410 and various circuits of memory represented by memory 420, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 400 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 410 in performing operations.

The processor 410 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or it may employ a multi-core architecture.

A memory 420 for storing a computer program; a transceiver 400 for transceiving data under the control of the processor; a processor 410 for reading the computer program in the memory and performing the following operations:

the forwarding devices existing on the primary user plane connection path and the standby user plane connection path are public forwarding devices, and message processing logic of the public forwarding devices is used for indicating data transmission through the primary user plane connection path, and the message processing logic comprises first message processing logic, second message processing logic and third message processing logic.

Optionally, the SDN controller sends corresponding first message processing logic to each first forwarding device, or sends corresponding second message processing logic to each first forwarding device and sends corresponding third message processing logic to each second forwarding device at the same time.

Optionally, the first message processing logic includes a source IP address or a destination IP address of the data to be transmitted, an output port of the data to be transmitted, and a priority of the first message processing logic.

Optionally, the second message processing logic includes a source IP address or a destination IP address of the data to be transmitted, an output port of the data to be transmitted, and a priority of the second message processing logic, where, on each of the first forwarding device or the common forwarding device, the priority of the second message processing logic is higher than the priority of the third message processing logic;

Optionally, when the primary user plane connection path is detected to be faulty, the control data transmission path is switched from the primary user plane connection path to the backup user plane connection path.

Optionally, when only sending the corresponding first message processing logic to each first forwarding device on the primary user plane connection path, the control data transmission path is switched from the primary user plane connection path to the backup user plane connection path, including:

sending a corresponding fourth message processing logic to each second forwarding device on the standby user plane connection path, wherein the fourth message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted and a priority of the fourth message processing logic, and the priority of the fourth message processing logic is higher than that of the first message processing logic on each second forwarding device or the public forwarding device; or alternatively, the process may be performed,

and sending a corresponding fifth message processing logic to each second forwarding device on the standby user plane connection path, and deleting all first message processing logic or first message processing logic of the public forwarding device on the main user plane connection path, wherein the fifth message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted and the priority of the fifth message processing logic.

Optionally, when sending corresponding second message processing logic to each first forwarding device on the primary user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path simultaneously, the control data transmission path is switched from the primary user plane connection path to the standby user plane connection path, including:

and deleting all the first message processing logic on the connection path of the main user plane or the first message processing logic of the public forwarding equipment.

Optionally, the method further comprises:

and operating the third message processing logic, the fourth message processing logic or the fifth message processing logic, and modifying the destination address of the data to be transmitted into an address capable of enabling the receiving equipment to correctly receive the data.

The above embodiments can implement all the method steps of the above method embodiments and achieve the same technical effects, and detailed descriptions thereof are omitted herein.

Fig. 5 is a block diagram of a data transmission device according to an embodiment of the present application, where the device includes:

a determining module 501, configured to determine, based on a primary-backup relationship between a pre-deployed primary receiving device and a backup receiving device, a primary user plane connection path and a backup user plane connection path that are disjoint;

A sending module 502, configured to send corresponding first message processing logic only to each first forwarding device on the primary user plane connection path, or send corresponding second message processing logic to each first forwarding device on the primary user plane connection path and send corresponding third message processing logic to each second forwarding device on the backup user plane connection path at the same time;

Optionally, the method further comprises:

and the control module is used for controlling the data transmission path to be switched from the main user plane connection path to the standby user plane connection path when the main user plane connection path is detected to be faulty.

Optionally, when only the corresponding first message processing logic is sent to each first forwarding device on the primary user plane connection path, the control module is specifically configured to:

Optionally, when sending corresponding second message processing logic to each first forwarding device on the primary user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path at the same time, the control module is specifically configured to:

Optionally, the device further includes an operation module, configured to operate the third message processing logic, the fourth message processing logic, or the fifth message processing logic, and modify the destination address of the data to be transmitted to an address capable of enabling the receiving device to correctly receive the data.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be noted that, the above device provided in this embodiment of the present application can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.

In another aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing the processor to perform the method described in the above embodiments.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), and the like.

As can be seen from the above embodiments, a processor readable storage medium stores a computer program for causing the processor to perform the method of data transmission described above.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A data transmission method, comprising:

the session management function SMF determines a main user plane connection path and a standby user plane connection path based on a main-standby relationship between a main receiving device and a standby receiving device which are deployed in advance;

transmitting corresponding first message processing logic only to each first forwarding device on the main user plane connection path, wherein each first forwarding device on the main user plane connection path is used for transmitting data only through the corresponding first message processing logic; or simultaneously sending corresponding second message processing logic to each first forwarding device on the primary user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path, wherein the priority of the second message processing logic is higher than that of the third message processing logic on each first forwarding device and each second forwarding device, or the priority of the second message processing logic is higher than that of the third message processing logic on a public forwarding device;

The forwarding devices existing on the primary user plane connection path and the standby user plane connection path are public forwarding devices, message processing logic on the public forwarding devices is used for indicating data transmission through the primary user plane connection path, and the message processing logic on the public forwarding devices comprises the first message processing logic, the second message processing logic and the third message processing logic.

2. The method for data transmission according to claim 1, wherein,

and sending corresponding first message processing logic to each first forwarding device or simultaneously sending corresponding second message processing logic to each first forwarding device and sending corresponding third message processing logic to each second forwarding device through a software defined network SDN controller.

3. The data transmission method according to claim 1, wherein the first message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of data to be transmitted, and a priority of the first message processing logic.

4. The method for data transmission according to claim 1, wherein,

The second message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted and a priority of the second message processing logic;

the third message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted and a priority of the third message processing logic.

5. The data transmission method according to claim 1, further comprising:

when the main user plane connection path is detected to be faulty, the control data transmission path is switched from the main user plane connection path to the standby user plane connection path.

6. The data transmission method of claim 5, wherein, when transmitting the corresponding first message processing logic only to each first forwarding device on the primary user plane connection path,

the control data transmission path is switched from the main user plane connection path to the standby user plane connection path, and the control data transmission path comprises:

7. The data transmission method of claim 5, wherein when simultaneously transmitting the corresponding second message processing logic to each first forwarding device on the primary user plane connection path and the corresponding third message processing logic to each second forwarding device on the backup user plane connection path,

8. The data transmission method according to any one of claims 1 to 7, characterized by further comprising:

9. An SMF network element comprising a memory, a transceiver, and a processor:

determining a main user plane connection path and a standby user plane connection path based on a main-standby relation between a main receiving device and a standby receiving device which are deployed in advance;

10. The SMF network element according to claim 9, characterized in that,

11. The SMF network element of claim 9, wherein said first message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of data to be transmitted, and a priority of said first message processing logic.

12. The SMF network element according to claim 9, characterized in that,

13. The SMF network element of claim 9, further comprising:

14. The SMF network element of claim 13, wherein when sending a corresponding first message handling logic only to each first forwarding device on said primary user plane connection path,

And sending a corresponding fifth message processing logic to each second forwarding device on the standby user plane connection path, and deleting all first message processing logic or first message processing logic of the public forwarding device on the main user plane connection path, wherein the fifth message processing logic comprises a source IP address or a destination IP address of data to be transmitted, an output port of the data to be transmitted and a priority of the fifth message processing logic.

15. The SMF network element of claim 13, wherein when sending corresponding second message processing logic to each first forwarding device on said primary user plane connection path and corresponding third message processing logic to each second forwarding device on said backup user plane connection path simultaneously,

16. The SMF network element according to any of the claims 9 to 15, further comprising:

17. A data transmission apparatus, comprising:

the determining module is used for determining a main user plane connection path and a standby user plane connection path by the session management function SMF based on a main-standby relation between a main receiving device and a standby receiving device which are deployed in advance;

the sending module is used for sending corresponding first message processing logic to each first forwarding device on the main user plane connection path only, and transmitting data through the corresponding first message processing logic by each first forwarding device on the main user plane connection path only; or simultaneously sending corresponding second message processing logic to each first forwarding device on the primary user plane connection path and sending corresponding third message processing logic to each second forwarding device on the standby user plane connection path, wherein the priority of the second message processing logic is higher than that of the third message processing logic on each first forwarding device and each second forwarding device, or the priority of the second message processing logic is higher than that of the third message processing logic on a public forwarding device;

18. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to execute the method of any one of claims 1 to 8.