CN117715242B

CN117715242B - Data transmission method, system, storage medium and electronic equipment

Info

Publication number: CN117715242B
Application number: CN202311739622.1A
Authority: CN
Inventors: 郝楠; 张汝云; 邹涛; 刘萌萌; 普莱姆
Original assignee: Zhejiang Lab
Current assignee: Zhejiang Lab
Priority date: 2023-12-15
Filing date: 2023-12-15
Publication date: 2024-05-28
Anticipated expiration: 2043-12-15
Also published as: CN117715242A

Abstract

According to the data transmission method, system, storage medium and electronic equipment provided by the specification, firstly, a session establishment request sent by a user is responded, UPF network mode information aiming at the session establishment request is determined through an SMF and used as target UPF network mode information, a target session strategy request aiming at the target UPF network mode information is generated so as to send the target session strategy request to a PCF, then, a target session strategy response can be generated through the PCF and returned to the SMF, and a control signaling aiming at the target session strategy response is generated through the SMF so as to send the control signaling to the UPF, so that the UPF can execute a data transmission task corresponding to the session establishment request according to the control signaling.

Description

Data transmission method, system, storage medium and electronic equipment

Technical Field

The present disclosure relates to the field of mobile communications technologies, and in particular, to a data transmission method, a system, a storage medium, and an electronic device.

Background

In recent years, with the rapid development of the field of mobile communication technology, the requirements of users on network service quality are gradually increased.

Currently, in the service architecture of the fifth generation communication system, data transmission can only be performed under a network mode aiming at a fixed protocol stack form, and the session management function (Session Management Function, SMF) can only acquire a network mode session policy aiming at a network mode corresponding to the fixed protocol stack. Therefore, the method can not meet various requirements of users on network service quality, and further reduces the data transmission efficiency.

Therefore, how to meet various requirements of users on network service quality and improve data transmission efficiency is a problem to be solved.

Disclosure of Invention

The present specification provides a data transmission method, system, storage medium, and electronic device, so as to partially solve the foregoing problems in the prior art.

The technical scheme adopted in the specification is as follows:

The present specification provides a data transmission method, which is applied to a data transmission system, wherein the data transmission system includes a session management function SMF, a user plane function UPF, and a policy control function PCF, and includes:

Responding to a session establishment request sent by a user, determining UPF network mode information aiming at the session establishment request through the SMF as target UPF network mode information, wherein the target UPF network mode is used for representing the form of a protocol stack required for bearing a data transmission task corresponding to the session establishment request;

Generating a target session policy request aiming at the target UPF network modal information through the SMF according to the target UPF network modal information, and sending the target session policy request to the PCF;

Generating a target session policy response by the PCF according to the target session policy request, and returning the target session policy response to the SMF;

And generating a control signaling aiming at the target session strategy response through the SMF according to the target session strategy response, and sending the control signaling to the UPF so that the UPF executes a data transmission task corresponding to the session establishment request according to the control signaling.

Optionally, determining, by the SMF, UPF network mode information for the session establishment request as target UPF network mode information, including:

determining session information corresponding to the session establishment request through the SMF as target session information;

The target session information is matched with each session information contained in a UPF network mode table preset in the SMF, so that session information matched with the target session information is determined in the UPF network mode table, and target UPF network mode information is determined according to the session information matched with the target session information in the UPF network mode table, wherein the target UPF network mode information contains the constitution information of a target UPF network mode and the identification information of the target UPF network mode, and the UPF network mode table is used for representing the correspondence between each prestored session information and UPF network mode information of each UPF network mode generated in advance.

Optionally, generating, by the SMF, a target session policy request for the target UPF network modality information according to the target UPF network modality information, and sending the target session policy request to the PCF, including:

And expanding the field of the standard cell through the SMF, filling the field information of the target UPF network modal information into the expanded field of the standard cell to obtain an expanded cell, generating a target session policy request of the target UPF network modal information according to the expanded cell, and sending the target session policy request to the PCF.

Optionally, field information of the target UPF network mode information is filled in an extension field of the standard cell to obtain an extended cell, which specifically includes:

Acquiring a preset mode constitution table through the SMF, wherein the mode constitution table is used for representing the corresponding relation between each layer of protocol and protocol identification in a protocol stack corresponding to each UPF network mode pre-generated by the UPF, and each protocol corresponds to a unique protocol identification;

And determining each protocol identifier matched with the target UPF network mode information from the mode constitution table through the SMF, taking each successfully matched protocol identifier as field information aiming at the target UPF network mode information, and filling the field information into an extension field of the standard cell.

Optionally, generating, by the PCF, a target session policy response according to the target session policy request, and returning the target session policy response to the SMF, including:

determining identification information of a target UPF network mode contained in the target session policy request through PCF, determining a target session policy aiming at the target UPF network mode information from a preset session policy table according to the identification information of the target UPF network mode and network state information of a current network, generating a target session policy response containing the target session policy, and returning the target session policy response to the SMF.

The present specification provides a data transmission system including: session management function SMF, user plane function UPF and policy control function PCF;

The SMF is used for responding to a session establishment request sent by a user, determining UPF network mode information aiming at the session establishment request as target UPF network mode information, generating a target session strategy request aiming at the target UPF network mode information, sending the target session strategy request to the PCF, generating control signaling aiming at a target session strategy response, and sending the control signaling to the UPF, wherein the target UPF network mode is used for representing the form of a protocol stack required for bearing a data transmission task corresponding to the session establishment request;

The PCF is used for generating a target session policy response according to the target session policy request and returning the target session policy response to the SMF;

And the UPF is used for executing the data transmission task corresponding to the session establishment request according to the control signaling.

Optionally, the SMF is further configured to determine session information corresponding to the session establishment request, as target session information, and match the target session information with session information included in a UPF network mode table preset in the SMF, so as to determine session information matched with the target session information in the UPF network mode table, and determine target UPF network mode information according to session information matched with the target session information in the UPF network mode table, where the target UPF network mode information includes configuration information of a target UPF network mode and identification information of a target UPF network mode, and the UPF network mode table is used to characterize a correspondence between prestored session information and UPF network mode information corresponding to each UPF instance pre-generated by the UPF.

Optionally, the SMF is further configured to extend a field of a standard cell, and fill field information of the target UPF network mode information into an extended field of the standard cell, so as to obtain an extended cell, generate, according to the extended cell, a target session policy request of the target UPF network mode information, and send the target session policy request to the PCF.

The present specification provides a computer readable storage medium storing a computer program which when executed by a processor implements the method of data transmission described above.

The present specification provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method of data transmission as described above when executing the program.

The above-mentioned at least one technical scheme that this specification adopted can reach following beneficial effect:

According to the data transmission method provided by the specification, firstly, in response to a session establishment request sent by a user, UPF network mode information aiming at the session establishment request is determined through an SMF and used as target UPF network mode information, a target session strategy request aiming at the target UPF network mode information is generated so as to send the target session strategy request to a PCF, then, a target session strategy response can be generated through the PCF and returned to the SMF, and a control signaling aiming at the target session strategy response is generated through the SMF so as to send the control signaling to the UPF, so that the UPF can execute a data transmission task corresponding to the session establishment request according to the control signaling.

According to the method, in the data transmission process, the SMF can determine the target UPF network mode information aiming at the session establishment request according to the specific requirements of the user in the session establishment request on the network service quality and the like, and send the target session strategy request aiming at the target UPF network mode information to the PCF so as to acquire the corresponding target session strategy. Namely, the method can meet the specific requirements of the user on the aspects of network service quality and the like by acquiring the target session policy of the UPF network mode corresponding to the specific requirements of the user on the aspects of network service quality and the like, thereby improving the data transmission efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the specification, illustrate and explain the exemplary embodiments of the present specification and their description, are not intended to limit the specification unduly. In the drawings:

Fig. 1 is a schematic flow chart of a data transmission method provided in the present specification;

Fig. 2 is a schematic structural diagram of a target UPF network mode provided in the present specification;

fig. 3 is a schematic diagram of a data transmission system provided in the present specification;

Fig. 4 is a schematic structural diagram of an electronic device corresponding to fig. 1 provided in the present specification.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present specification more apparent, the technical solutions of the present specification will be clearly and completely described below with reference to specific embodiments of the present specification and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present specification. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.

The following describes in detail the technical solutions provided by the embodiments of the present specification with reference to the accompanying drawings.

Fig. 1 is a schematic flow chart of a data transmission method provided in the present specification, including the following steps:

S101: and responding to a session establishment request sent by a user, determining UPF network mode information aiming at the session establishment request through the SMF as target UPF network mode information, wherein the target UPF network mode is used for representing the form of a protocol stack required for bearing a data transmission task corresponding to the session establishment request.

Currently, in the service architecture of the fifth generation communication system, data transmission can only be performed under a network mode aiming at a fixed protocol stack form, and the session management function (Session Management Function, SMF) can only acquire a network mode session policy aiming at a network mode corresponding to the fixed protocol stack. Therefore, various requirements of users on network service quality and the like cannot be met, and further the data transmission efficiency is reduced.

In order to solve the above problems, the present disclosure provides a method for data transmission, which may be applied to a data transmission system, where the data transmission system may include a session management function SMF, a user plane function (User Plane Function, UPF), and a policy control function (Policy Control Function, PCF).

In this specification, a user may initiate a session establishment request through a terminal device during data transmission under the service architecture of the fifth generation communication system, and then, an access and mobility management function (ACCESS AND Mobility Management Function, AMF) may forward the session establishment request to the SMF.

The SMF may determine and use the UPF network modality information for the session establishment request as target UPF network modality information, where the target UPF network modality may be used to characterize a form of a protocol stack required to carry a data transmission task corresponding to the session establishment request.

Specifically, the SMF may determine session information corresponding to the session establishment request, where the session information may include, as target session information, information such as a quality of service (QoS, quality of Service) requirement (e.g., network bandwidth requirement reaching 50Mbps, network delay requirement 20ms-50ms, etc.), a requested service type (e.g., online game service, video service, etc.), and a server address carried in the session establishment request of the user.

Then, the SMF may match the target session information with each session information included in a UPF network mode table preset in the SMF, so as to determine session information matched with the target session information in the UPF network mode table, and use UPF network mode information corresponding to the session information matched with the target session information in the UPF network mode table as target UPF network mode information. The target UPF network mode information includes configuration information of the target UPF network mode and identification information of the target UPF network mode, where the configuration information of the target UPF network mode is used to represent form information of a protocol stack required for carrying a data transmission task corresponding to the session establishment request, and a structure of the target UPF network mode may specifically refer to fig. 2.

Fig. 2 is a schematic structural diagram of a target UPF network mode provided in the present specification.

As can be seen from fig. 2, the target UPF network mode is formed by a four-layer Protocol, layer 1 employs Twisted Pair Cable (TPC), layer 2 employs a Point-to-Point Protocol (PPP), layer 3 employs a named data networking Protocol (NAMED DATA Networking Protocol, NDN), and layer 4 employs a user datagram Protocol (User Datagram Protocol, UDP).

It should be noted that the configuration of the protocol stack corresponding to the UPF network mode may be set according to requirements, for example, in order to enhance security and privacy in the network communication process, a layer 5 (transmission security layer) including a transmission layer security protocol (Transport Layer Security, TLS) may be added. Of course, fig. 2 illustrates only one form of a target UPF network modality.

In addition, the UPF network mode table may be used to characterize a correspondence between each session information pre-stored in the SMF and UPF network mode information of each UPF network mode pre-generated by the UPF. The session information and the UPF network mode information in the UPF network mode table may be session information corresponding to each UPF instance and information of a UPF network mode corresponding to each UPF instance, which are obtained after the UPF is instantiated in advance, where one UPF instance may correspond to one UPF service, and the UPF instantiation may refer to starting and configuring one UPF service.

S102: and generating a target session policy request aiming at the target UPF network modal information through the SMF according to the target UPF network modal information, and sending the target session policy request to the PCF.

S103: and generating a target session policy response by the PCF according to the target session policy request, and returning the target session policy response to the SMF.

In this specification, the SMF may generate a target session policy request for target UPF network mode information according to the target UPF network mode information, and send the target session policy request to the PCF.

Specifically, the SMF may extend a field of the standard cell, and fill field information for the target UPF network mode information into an extended field of the standard cell, so as to obtain an extended cell. In this specification, standard cells may use session management policy context data cells defined in the Technical specification No. 29.512 ("Technical specific 29.512, TS 29.512"), and the cell structure corresponding to the field information for the target UPF network mode may be referred to in table 1 below.

TABLE 1

As can be seen from table 1, the cell structure corresponding to the field information of the target UPF network mode may include two attributes of the network mode identifier and the protocol mode (i.e. network mode configuration information), and the extended cell may be obtained by filling the field information of the target UPF network mode into the extension field of the standard cell.

It should be noted that, in the process of filling the field information of the target UPF network mode information into the extension field of the standard cell, a preset mode composition table may be first obtained, where the mode composition table may be used to characterize a correspondence between each layer of protocol and a protocol identifier in a protocol stack corresponding to each UPF network mode that is generated in advance by the UPF, and each protocol corresponds to a unique protocol identifier. Each UPF network mode pre-generated by the UPF may be a UPF network mode corresponding to each UPF instance obtained after the UPF is pre-instantiated, one UPF instance may correspond to one UPF service, and the UPF instantiation may refer to starting and configuring one UPF service. The mode composition table may be referred to in tables 2 to 5 below.

TABLE 2

Layer 1	Protocol identification
		Twisted-pair Cable	0
COAX	1
		Optical Fiber	2
Wireless	3

TABLE 3 Table 3

Layer 2	Protocol identification
		Ethernet	0
PPP	1

TABLE 4 Table 4

Layer 3	Protocol identification
		IPv4	0
IPv6	1
		NDN	2
GN	3
		MF	4

TABLE 5

Layer 4	Protocol identification
		TCP	0
UDP	1

It can be seen that tables 2 to 5 are used to respectively represent the correspondence between each protocol and each protocol identifier in the 4 protocol layers, and each protocol corresponds to a unique protocol identifier. The mode constitution table may manually define the number of layers of the protocol layers in the table, the protocol contained in each protocol layer and the corresponding protocol identifications according to the requirement, and of course, tables 2 to 5 only list one mode constitution table.

It should be noted that the number of protocols that each protocol layer in the modality configuration table may include may be predefined according to requirements. For example: each protocol layer may be predefined to include eight protocol stacks and eight protocol identifications are predefined. For layer 4 shown in table 5, layer 4 currently contains two protocols and corresponds to two protocol identifications. Then, there are six reserved protocol identifiers in layer 4, and in the actual application process, the rest of protocols can be added at the corresponding positions of the reserved protocol identifiers according to the requirements, for example, for the requirements of the network service with higher reliability, the stream control transmission protocol (Stream Control Transmission Protocol, SCTP) can be added at the corresponding positions of the reserved protocol identifiers in layer 4.

Then, the SMF may determine, from the mode configuration table, each protocol identifier that matches the target network mode information, and take each successfully matched protocol identifier as field information for the target UPF network mode information and fill the field information into an extension field of the standard cell, where the field information for the target UPF network mode information may refer to the following table 6 specifically.

TABLE 6

It can be seen that, table 6 is field information in the form of a protocol stack corresponding to the target UPF network modality in fig. 2, where the Twisted-pair Cable of layer 1 corresponds to a protocol identifier of 0, the field corresponding to layer 1 of table 6 may be represented by binary 0000, the PPP protocol of layer 2 corresponds to a protocol identifier of 1, the field corresponding to layer 2 of table 6 may be represented by binary 0001, the NDN protocol of layer 3 corresponds to a protocol identifier of 2, the field corresponding to layer 3 of table 6 may be represented by 0010, the UDP protocol of layer 4 corresponds to a protocol identifier of 1, and the field corresponding to layer 4 of table 6 may be represented by 0001. Of course, table 6 only lists one field information, and in practical application, corresponding changes may be made according to the form of the protocol stack corresponding to the target network mode (such as filling other information in the nth octet in table 6 in sequence, where n may be any number).

The SMF may then generate a target session policy request for the target UPF network modality information based on the extended cells and send the target session policy request to the PCF.

The PCF may generate a target session policy response based on the target session policy request and return the target session policy response to the SMF.

Specifically, the PCF may determine identification information of a target UPF network mode included in the target session policy request, determine, from a session policy table, the target UPF network mode corresponding to the identification information and a target session policy corresponding to the target UPF network mode, so as to generate a target session policy response including the target session policy, and send the target session policy response back to the SMF. The session policy table may be a set of pre-stored session policies for each network mode pre-generated by the UPF in the PCF, where the session policies may include various policies, such as: determining QoS policies of service quality grades corresponding to data flows of different service types, data flow monitoring and control policies for limiting flows, charging policies for setting charging rates according to different service types and usage amounts, and the like.

It should be noted that, when determining the target session policy, besides the above manner, the PCF may also collect network status information (such as network resource utilization rate, traffic usage condition, etc.) of the current network, and analyze the network status information, so as to adjust the corresponding policy in the session policy table, thereby improving the network resource utilization rate and the data transmission efficiency as much as possible. The PCF may periodically collect and analyze network state information of the current network, and further periodically adjust corresponding policies in the session policy table, so as to ensure that the target session policy may adapt to different network states and service requirements. For example: as an excessive number of users causes network congestion, the PCF may adjust the corresponding policies in the session policy table, such as: allocating network resources to higher priority traffic, data rate limiting specific users to reduce the amount of data transferred, etc.

S104: and generating a control signaling aiming at the target session strategy response through the SMF according to the target session strategy response, and sending the control signaling to the UPF so that the UPF executes a data transmission task corresponding to the session establishment request according to the control signaling.

After the SMF receives the target session policy response, control signaling for the target session policy may be generated and issued to the UPF.

The UPF may perform the data transmission service corresponding to the session establishment request according to the control signaling. For example: the UPF can transmit the data packet corresponding to the session establishment request to the target server through each network node (such as a firewall, a load balancer and the like) so that the target server unpacks and processes and analyzes the data packet, and then the response data packet is transmitted back to the terminal equipment of the user, and the whole data transmission process is completed.

Therefore, the method in the specification can generate the target session policy aiming at the specific requirements of the user on the network service quality and the like according to the specific requirements of the user on the network service quality and the like in the session establishment request, and further can meet the specific requirements of the user, thereby improving the data transmission efficiency.

In addition, the present disclosure also provides a data transmission system, as shown in fig. 3.

Fig. 3 is a schematic diagram of a data transmission system provided in the present specification.

As can be seen from fig. 3, the data transmission system mentioned in the present specification may include: SMF, UPF, and PCF. Wherein, the UPF may be instantiated in advance to obtain a plurality of UPF instances, and each UPF instance has a corresponding UPF network mode, that is, there may be a plurality of UPF network modes (such as UPF network mode k in fig. 3). And then, the information of each UPF network mode corresponding to each UPF instance can be prestored in the SMF, and meanwhile, the relation between each session information and each UPF network mode information can be stored in the SMF, wherein one UPF instance can refer to one UPF service, and UPF instantiation can refer to starting and configuring one UPF service. In addition, each session policy corresponding to each UPF network mode may be pre-stored in the PCF, so that the subsequent PCF may perform a corresponding session policy response according to the session policy request.

In order to meet the requirements of users on network service quality and the like, when a session establishment request of a user is received, an SMF in a system in the specification can query target UPF network mode information matched with the session establishment request from a UPF network mode table preset in the SMF, and fields aiming at the target UPF network mode information are filled in field expansion positions of standard fields, so that expanded cells containing the target UPF network mode information can be obtained. The SMF may then generate a target session policy request based on the extended cell and send the target session policy request to the PCF, such that the user's specific requirements may be included in the target session policy request.

When the PCF receives a target session policy request containing specific requirements of a user, the PCF may query, according to target UPF network mode identification information carried in the target session policy request, a target session policy for the target UPF network mode information from a pre-stored session policy table, so as to generate a corresponding target session policy response, and send the target session policy response to the SMF.

It should be noted that, the PCF may also refer to the network status information of the current network, and accordingly adjust the session policy (such as allocating network resources to a service with a higher priority preferentially in case of poor network quality, etc.), so as to obtain a target session policy that is relatively suitable for the current network status.

Then, the SMF may generate a control signaling for the target session policy response according to the received target session policy response, and send the control signaling to the UPF, so that the UPF performs a data transmission task corresponding to the session establishment request according to the control signaling.

Of course, the method and system related in the present specification may add, to the session policy request sent by the existing SMF, corresponding information of the session establishment request for the user, so as to enable the PCF to generate a corresponding session policy, where the session policy may be adjusted correspondingly based on the original session policy for the network modality in the fixed protocol stack, so that the UPF may apply the adjusted session policy to execute the data transmission task corresponding to the session establishment request.

Specifically, after receiving a session establishment request of a user, the SMF may extend a field of a cell included in a session policy request for a current UPF network mode, and perform field filling at the extended field, to obtain an extended cell, and generate a target session policy request according to the extended cell, so as to send the target session policy request to the PCF. Then, the PCF may query the current UPF network mode information first, determine a session policy in the current UPF network mode, and further adjust the session policy in the current UPF network mode according to the target session policy request generated by the extended cell, so as to obtain an adjusted session policy, and enable the UPF to execute a data transmission task according to the adjusted session policy.

It should be noted that the fields filled in the extension fields can characterize the information for adjusting the session policy in the current UPF network mode, and the adjusted session policy still meets the requirement in the current UPF network mode, but in the current UPF network mode, the session policy in the current UPF network mode is fine-tuned according to the actual requirement of the user, so that the adjusted session policy can meet the specific requirement of the user to a certain extent.

Therefore, the method can adjust the session policy in the current UPF network mode according to the actual requirement of the user, so that the UPF can execute the data transmission task according to the adjusted session policy, thereby meeting the specific requirement of the user to a certain extent and further improving the data transmission efficiency and the satisfaction degree of the user.

The present specification also provides a computer readable storage medium storing a computer program operable to perform the data transmission method provided in fig. 1 described above.

The present specification also provides a schematic structural diagram of an electronic device corresponding to fig. 1 shown in fig. 4. At the hardware level, as shown in fig. 4, the electronic device includes a processor, an internal bus, a network interface, a memory, and a nonvolatile storage, and may of course include hardware required by other services. The processor reads the corresponding computer program from the nonvolatile memory into the memory and then runs the same to implement the data transmission method described in fig. 1.

Of course, other implementations, such as logic devices or combinations of hardware and software, are not excluded from the present description, that is, the execution subject of the following processing flows is not limited to each logic unit, but may be hardware or logic devices.

In the 90 s of the 20 th century, improvements to one technology could clearly be distinguished as improvements in hardware (e.g., improvements to circuit structures such as diodes, transistors, switches, etc.) or software (improvements to the process flow). However, with the development of technology, many improvements of the current method flows can be regarded as direct improvements of hardware circuit structures. Designers almost always obtain corresponding hardware circuit structures by programming improved method flows into hardware circuits. Therefore, an improvement of a method flow cannot be said to be realized by a hardware entity module. For example, a programmable logic device (Programmable Logic Device, PLD) (e.g., field programmable gate array (Field Programmable GATE ARRAY, FPGA)) is an integrated circuit whose logic functions are determined by user programming of the device. A designer programs to "integrate" a digital system onto a PLD without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Moreover, nowadays, instead of manually manufacturing integrated circuit chips, such programming is mostly implemented with "logic compiler (logic compiler)" software, which is similar to the software compiler used in program development and writing, and the original code before being compiled is also written in a specific programming language, which is called hardware description language (Hardware Description Language, HDL), but HDL is not just one, but a plurality of kinds, such as ABEL(Advanced Boolean Expression Language)、AHDL(Altera Hardware Description Language)、Confluence、CUPL(Cornell University Programming Language)、HDCal、JHDL(Java Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby Hardware Description Language), and VHDL (Very-High-SPEED INTEGRATED Circuit Hardware Description Language) and Verilog are currently most commonly used. It will also be apparent to those skilled in the art that a hardware circuit implementing the logic method flow can be readily obtained by merely slightly programming the method flow into an integrated circuit using several of the hardware description languages described above.

The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer readable medium storing computer readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, application SPECIFIC INTEGRATED Circuits (ASICs), programmable logic controllers, and embedded microcontrollers, examples of controllers include, but are not limited to, the following microcontrollers: ARC 625D, atmel AT91SAM, microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic of the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller in a pure computer readable program code, it is well possible to implement the same functionality by logically programming the method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Such a controller may thus be regarded as a kind of hardware component, and means for performing various functions included therein may also be regarded as structures within the hardware component. Or even means for achieving the various functions may be regarded as either software modules implementing the methods or structures within hardware components.

The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in one or more software and/or hardware elements when implemented in the present specification.

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

The present description is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the specification. 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 program instructions. These computer program 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 computer program instructions may also be stored in a computer-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 computer-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 computer program 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.

In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

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

The description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The foregoing is merely exemplary of the present disclosure and is not intended to limit the disclosure. Various modifications and alterations to this specification will become apparent to those skilled in the art. Any modifications, equivalent substitutions, improvements, or the like, which are within the spirit and principles of the present description, are intended to be included within the scope of the claims of the present description.

Claims

1. A data transmission method, wherein the method is applied to a data transmission system, the data transmission system comprises a session management function SMF, a user plane function UPF and a policy control function PCF, and the method comprises:

2. The method of claim 1, wherein determining, by the SMF, UPF network modality information for the session establishment request as target UPF network modality information, specifically comprises:

3. The method of claim 1, wherein generating, by the SMF, a target session policy request for the target UPF network modality information based on the target UPF network modality information, and sending the target session policy request to the PCF, comprises:

4. A method according to claim 3, wherein field information for the target UPF network mode information is padded at an extension field of the standard cell to obtain an extended cell, specifically comprising:

5. The method of claim 1, wherein generating a target session policy response by the PCF based on the target session policy request and returning the target session policy response to the SMF, comprises:

6. A data transmission system, the data transmission system comprising: session management function SMF, user plane function UPF and policy control function PCF;

7. The system of claim 6 wherein the SMF is further configured to determine session information corresponding to the session establishment request as target session information, and match the target session information with session information included in a UPF network mode table preset in the SMF, so as to determine session information matched with the target session information in the UPF network mode table, and determine target UPF network mode information according to session information matched with the target session information in the UPF network mode table, where the target UPF network mode information includes configuration information of a target UPF network mode and identification information of a target UPF network mode, and the UPF network mode table is used to characterize a correspondence between prestored session information and UPF network mode information corresponding to UPF instances pre-generated by the UPF.

8. The system of claim 6 wherein the SMF is further configured to extend a field of a standard cell and populate field information for the target UPF network mode information at the extended field of the standard cell to obtain an extended cell, to generate a target session policy request for the target UPF network mode information from the extended cell, and to send the target session policy request to the PCF.

9. A computer-readable storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method of any of the preceding claims 1-5.

10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of the preceding claims 1-5 when executing the program.