WO2025148843A1 - Data transformation method and apparatus and storage medium - Google Patents

Abstract

Embodiments of the present disclosure provide a data transmission method and apparatus and a storage medium. The data transmission method applied to an access network device comprises: receiving first forward error correction (FEC) information from a first core network device or a terminal, the first FEC information comprising at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; and executing at least one of the following on the basis of the first FEC information: determining at least one of a packet error rate, a delay, and a specific proportion or a specific number of protocol data units (PDUs) in a transmitted PDU set; executing the FEC method; determining the FEC method; and sending at least one of the FEC indication, the FEC method and the FEC parameter to the terminal.

Description

Data transmission method, device and storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 202410045486.4, filed on January 11, 2024, entitled “Data Transmission Method, Device and Storage Medium”, which is incorporated herein by reference in its entirety.

Technical Field

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

Background Art

With the extension of network ecology and the development of network technology, network services are becoming more and more abundant. Mobile media services refer to services that play multimedia content such as video and audio in real time on terminals such as user equipment (UE) through mobile networks.

Mobile media services, such as augmented reality (AR)/virtual reality (VR), cloud gaming and extended reality (XR), are generating more and more traffic in the fifth generation mobile communication technology (5G) networks.

Mobile media services have the following requirements: When an application uses the Forward Error Correction (FEC) mechanism, the application transmits a specific number/ratio of packets of the Protocol Data Unit Set (PDU Set) so that the data receiver can correctly parse the contents of the PDU Set.

However, the relevant technology does not support the requirement of mobile media services to transmit only a specific number/ratio of data packets in the PDU Set, which affects the user experience.

Summary of the invention

The embodiments of the present disclosure provide a data transmission method, device and storage medium to solve the problem that related technologies do not support the requirement that mobile media services only transmit a specific number/ratio of data packets in a PDU Set, thereby improving user experience.

In a first aspect, an embodiment of the present disclosure provides a data transmission method, which is applied to an access network device, including:

Receiving first forward error correction (FEC) information from a first core network device or a terminal, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

According to the first FEC information, at least one of the following is performed:

Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted;

Execute FEC method;

Determine the FEC method;

At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal.

In some embodiments, according to a data transmission method according to an embodiment of the present disclosure, the FEC method for determining includes at least one of the following:

Determine the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

The FEC method is determined according to the FEC method supported by the terminal and the FEC method supported by the access network device.

In some embodiments, according to a data transmission method of an embodiment of the present disclosure, the method further includes: receiving FEC capability reported by the terminal.

In some embodiments, according to a data transmission method according to an embodiment of the present disclosure, the method further includes:

Sending request information to the terminal, where the request information is used to request an FEC method and/or FEC capability supported by the terminal.

In a second aspect, an embodiment of the present disclosure further provides a data transmission method, which is applied to a terminal, and the method includes:

Send first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, wherein the first FEC information includes at least one of an FEC method, an FEC mode and an FEC parameter.

In some embodiments, according to a data transmission method according to an embodiment of the present disclosure, the method further includes:

The FEC capabilities supported by the terminal reported to the access network device.

In some embodiments, according to a data transmission method according to an embodiment of the present disclosure, the method further includes:

Receive request information sent by the access network device, where the request information is used to request an FEC method and/or FEC capability supported by the terminal.

In some embodiments, according to a data transmission method according to an embodiment of the present disclosure, the method further includes:

Receiving at least one of an FEC indication, an FEC method, and an FEC parameter sent by the access network device;

The FEC method is executed according to at least one of the FEC indication, the FEC method and the FEC parameter.

In a third aspect, an embodiment of the present disclosure further provides a data transmission method, which is applied to a first core network device, and the method includes:

Receive first forward error correction FEC information sent by the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

Send the first FEC information to the access network device.

In a fourth aspect, an embodiment of the present disclosure further provides a data transmission method, which is applied to a second core network device, and the method includes:

Acquire first forward error correction FEC information, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

According to the first FEC information, at least one of the following is performed:

Sending the first FEC information to a first core network device;

Determining a packet error rate and/or a delay according to the FEC method;

According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information.

In some embodiments, according to a data transmission method according to an embodiment of the present disclosure, the acquiring of first forward error correction FEC information includes at least one of the following:

receiving said first FEC information from an application function AF;

Receiving the FEC indication from the AF; determining the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

Receiving second FEC information sent by a terminal through an SMF; determining the first FEC information according to the second FEC information;

The first FEC information is determined according to local configuration and/or terminal subscription information.

In some embodiments, according to a data transmission method according to an embodiment of the present disclosure, the method further includes:

Receive an event notification sent by AMF, where the event notification includes the FEC method supported by the terminal.

In a fifth aspect, an embodiment of the present disclosure further provides a data transmission method, which is applied to an application function AF, and the method includes:

First forward error correction FEC information is sent to the second core network device, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter.

In a sixth aspect, an embodiment of the present disclosure further provides an access network device, including a memory, a transceiver, and a processor, wherein:

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

Receiving first forward error correction (FEC) information from a first core network device or a terminal, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

According to the first FEC information, at least one of the following is performed:

Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted;

Execute FEC method;

Determine the FEC method;

At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal.

In some embodiments, the determining the FEC method includes at least one of the following:

Determine the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

The FEC method is determined according to the FEC method supported by the terminal and the FEC method supported by the access network device.

In a seventh aspect, an embodiment of the present disclosure further provides a terminal, including a memory, a transceiver, and a processor, wherein:

The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

Send first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, wherein the first FEC information includes at least one of an FEC method, an FEC mode and an FEC parameter.

In some embodiments, the operations further include:

Receiving at least one of an FEC indication, an FEC method, and an FEC parameter sent by the access network device;

The FEC method is executed according to at least one of the FEC indication, the FEC method and the FEC parameter.

In an eighth aspect, an embodiment of the present disclosure further provides a first core network device, including a memory, a transceiver, and a processor, wherein:

The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

Receive first forward error correction FEC information sent by the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

Send the first FEC information to the access network device.

In a ninth aspect, an embodiment of the present disclosure further provides a second core network device, including a memory, a transceiver, and a processor, wherein:

The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

Acquire first forward error correction FEC information, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

According to the first FEC information, at least one of the following is performed:

Sending the first FEC information to a first core network device;

Determining a packet error rate and/or a delay according to the FEC method;

According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information.

In some embodiments, the obtaining of the first forward error correction (FEC) information includes at least one of the following:

receiving said first FEC information from an application function AF;

Receiving the FEC indication from the AF; determining the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

Receiving second FEC information sent by a terminal through an SMF; determining the first FEC information according to the second FEC information;

The first FEC information is determined according to local configuration and/or terminal subscription information.

In a tenth aspect, an embodiment of the present disclosure further provides an AF, including a memory, a transceiver, and a processor, wherein:

The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

First forward error correction FEC information is sent to the second core network device, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter.

In an eleventh aspect, an embodiment of the present disclosure further provides a data transmission device, applied to an access network device, including:

A first receiving module, configured to receive first forward error correction FEC information from a first core network device or a terminal, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

A first execution module is configured to execute at least one of the following according to the first FEC information:

Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted;

Execute FEC method;

Determine the FEC method;

At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal.

In a twelfth aspect, an embodiment of the present disclosure further provides a data transmission device, applied to a terminal, including:

The second sending module is used to send the first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, and the first FEC information includes at least one of the FEC method, FEC mode and FEC parameters.

In a thirteenth aspect, an embodiment of the present disclosure further provides a data transmission device, applied to a first core network device, including:

A fourth receiving module, configured to receive first forward error correction FEC information sent by a second core network device, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

The third sending module is used to send the first FEC information to the access network device.

In a fourteenth aspect, an embodiment of the present disclosure further provides a data transmission device, applied to a second core network device, including:

An acquisition module, configured to acquire first forward error correction FEC information, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

A third execution module is configured to execute at least one of the following according to the first FEC information:

Sending the first FEC information to a first core network device;

Determining a packet error rate and/or a delay according to the FEC method;

According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information.

In a fifteenth aspect, an embodiment of the present disclosure further provides a data transmission device, applied to AF, including:

The fourth sending module is used to send first forward error correction FEC information to the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter.

In the sixteenth aspect, an embodiment of the present disclosure further provides a non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the data transmission method described in any one of the first to fifth aspects above.

In the seventeenth aspect, an embodiment of the present disclosure further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the steps of the data transmission method described in any one of the first to fifth aspects above.

In aspect 18, an embodiment of the present disclosure further provides a communication device, in which a computer program is stored, and the computer program is used to enable the communication device to execute the data transmission method described in any one of aspects 1 to 5 above.

In the nineteenth aspect, an embodiment of the present disclosure further provides a chip product, wherein a computer program is stored in the chip product, and the computer program is used to enable the chip product to execute the data transmission method described in any one of the first to fifth aspects above.

The data transmission method, device and storage medium provided by the embodiments of the present disclosure receive the first FEC information from the first core network device or terminal through the access network device, wherein the first FEC information includes at least one of the FEC indication, FEC method, FEC mode and FEC parameters; according to the first FEC information, at least one of the following is performed: determining at least one of the packet error rate, delay, and a specific proportion or a specific number of PDUs in the transmitted PDU Set; executing the FEC method; determining the FEC method; and sending at least one of the FEC indication, FEC method and FEC parameters to the terminal. Thus, when the application uses the FEC mechanism, the application only transmits a specific number/specific proportion of PDUs in the PDU Set, and the access network device can perform transmission processing on the received PDU based on the packet error rate, or successfully transmit a specific proportion or a specific number of PDUs in the PDU Set, and can correctly parse the content of the PDU Set, so that the receiving party can parse the content of the PDU Set when receiving a specific number/specific proportion of PDUs in the PDU Set, and can support the requirements of the mobile media service to transmit a specific number/proportion of data packets in the PDU Set, thereby improving the user experience.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a flow chart of a data transmission method according to an embodiment of the present disclosure;

FIG2 is a second flow chart of a data transmission method provided by an embodiment of the present disclosure;

FIG3 is a third flow chart of the data transmission method provided by an embodiment of the present disclosure;

FIG4 is a fourth flowchart of the data transmission method provided by an embodiment of the present disclosure;

FIG5 is a fifth flow chart of a data transmission method provided by an embodiment of the present disclosure;

FIG6 is a sixth flowchart of the data transmission method provided by an embodiment of the present disclosure;

FIG. 7 is a seventh flowchart of a data transmission method provided by an embodiment of the present disclosure;

FIG8 is a flowchart of an eighth embodiment of the data transmission method provided by the present disclosure;

FIG9 is a ninth flowchart of a data transmission method provided in an embodiment of the present disclosure;

FIG10 is a flowchart of a data transmission method according to an embodiment of the present disclosure;

FIG11 is a flowchart of a data transmission method according to an embodiment of the present disclosure;

FIG12 is a schematic diagram of a process of obtaining UE capabilities by a PCF according to an embodiment of the present disclosure;

FIG13 is a twelfth flowchart of a data transmission method provided in an embodiment of the present disclosure;

FIG14 is a schematic diagram of the structure of an access network device provided in an embodiment of the present disclosure;

FIG15 is a schematic diagram of the structure of a terminal provided in an embodiment of the present disclosure;

FIG16 is a schematic diagram of the structure of a first core network device provided in an embodiment of the present disclosure;

FIG17 is a schematic diagram of the structure of a second core network device provided in an embodiment of the present disclosure;

FIG18 is a schematic diagram of the structure of an AF provided in an embodiment of the present disclosure;

FIG19 is a schematic diagram of a structure of a data transmission device according to an embodiment of the present disclosure;

FIG20 is a second structural diagram of the data transmission device provided in an embodiment of the present disclosure;

FIG21 is a third structural diagram of the data transmission device provided in an embodiment of the present disclosure;

FIG22 is a fourth structural diagram of the data transmission device provided in an embodiment of the present disclosure;

FIG. 23 is a fifth structural diagram of the data transmission device provided in an embodiment of the present disclosure.

DETAILED DESCRIPTION

In the embodiments of the present disclosure, the term "and/or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects before and after are in an "or" relationship.

The term "plurality" in the embodiments of the present disclosure refers to two or more than two, and other quantifiers are similar thereto.

The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

The embodiments of the present disclosure provide a data transmission method, device and storage medium, which can support the needs of mobile media services to transmit a specific number/ratio of data packets in PDU Set, thereby improving user experience.

Among them, the method and the device are based on the same public concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

The technical solution provided by the embodiments of the present disclosure can be applicable to a variety of systems, such as a 5G system or a 6G system, etc. For example, the applicable systems may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a worldwide interoperability for microwave access (WiMAX) system, a 5G new radio (NR) system, etc. These systems include terminal equipment and network equipment. The system can also include core network parts, such as Evolved Packet System (EPS) and 5G System (5GS).

The terminal device involved in the embodiments of the present disclosure 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 devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). The wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and/or data with a radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistant (PDA) and other devices. Wireless terminal devices may also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, access points, remote terminal devices, access terminal devices, user terminal devices, user agents, and user devices, which are not limited in the embodiments of the present disclosure.

The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services to the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present disclosure may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolved network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), a 6G base station in the 6G network architecture, or a home evolved Node B (HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., but is not limited in the embodiments of the present disclosure. In some network structures, network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and the distributed unit may also be geographically separated.

In order to facilitate a clearer understanding of the various embodiments of the present disclosure, some relevant knowledge is first introduced.

1. The mobile media business is introduced as follows:

Mobile media services have some common characteristics, such as:

1. A frame includes multiple data packets, which are related to each other. The application needs to receive all data packets to parse the frame. For example, the XR application does not process a data packet, but a media unit (application data unit).

2. Different data packets of the same video stream, if they belong to different frame types (I/P frames) or are located at different positions in a group of pictures, will have different impacts on the user experience.

In addition, XR/media traffic has high throughput, low latency, and high reliability requirements, and UE power consumption will also affect the user experience because high throughput leads to high power consumption.

In addition to video and audio, some enhanced XR or media services may include more modalities, such as information generated by different sensors, tactile or emotional data for immersive experiences, such as tactile data or sensor data.

2. The PDU Set Quality of Service (QoS) parameters are introduced as follows:

PDU Set QoS parameters include PDU Set Delay Budget (PSDB), PDU Set Error Rate (PSER) and PSIHI, among which:

PSDB: Used to indicate the upper limit of the latency of PDU Set, which refers to the time period from receiving the first PDU to receiving all PDUs of PDU Set.

PSER: An upper limit for the proportion of packets that have been processed by the sender's link layer (e.g., the RAN Radio Link Control (RLC) layer) but have not been successfully transmitted to the receiver's upper layer (e.g., the RAN Packet Data Convergence Protocol (PDCP) layer). PSER is an upper limit for the proportion of non-congestion related PDU Set losses.

PSIHI: Used to indicate whether the application layer needs to receive all PDUs in the PDU Set before using the PDU Set.

The PCF determines the PDU Set QoS parameters based on the application function (AF) and/or local configuration and sends them to the Session Management Function (SMF) through PCC rules. The SMF sends them to the Next Generation Radio Access Network (NG-RAN) through the QoS profile. If the NG-RAN receives the PDU Set QoS parameters and supports them, the NG-RAN uses PDU Set-based QoS control and uses the PDU Set QoS parameters.

Mobile media services have the following requirements: When an application uses the Forward Error Correction (FEC) mechanism, the application transmits a specific number/ratio of packets of the Protocol Data Unit Set (PDU Set) so that the data receiver can correctly parse the contents of the PDU Set.

The related technology supports PDU Set Integrated Handling Information (PSIHI), where PSIHI is used to indicate whether the application layer needs to receive all PDUs in the PDU Set before using the PDU Set.

However, the 5G network in the related technology does not support the above-mentioned requirements of mobile media services, that is, the related technology does not support the requirement of mobile media services to only transmit a specific number/ratio of data packets in the PDU Set, which affects the user experience.

FIG. 1 is a flow chart of a data transmission method provided in an embodiment of the present disclosure. The method is applied to an access network device. As shown in FIG. 1 , the method includes steps 101 to 102, wherein:

Step 101: Receive first forward error correction (FEC) information from a first core network device or a terminal, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

Step 102: Perform at least one of the following according to the first FEC information:

Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted;

Execute FEC method;

Determine the FEC method;

At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal.

It should be noted that the FEC method (FEC Scheme) and FEC parameters are related technologies. The FEC method can be parity check, cyclic redundancy check, Hamming code, etc. FEC parameters can be redundancy, maximum number of frames, mask bit identification, etc.; among them, redundancy is a ratio, which means the ratio of the amount of additional information added after encoding to the amount of original data. The original data transmission redundancy represents the proportion of data. The data receiver can restore the original data using the FEC method; the maximum number of frames indicates the maximum amount of frame data protected by FEC during transmission; the mask bit identification is used to describe how to apply FEC to different frames.

The FEC indication is used to instruct the UE to start the FEC function.

In some embodiments, the packet error rate includes at least one of the following: packet error rate (Packet Error Rate, PER); PDU Set Error Rate (PDU Set Error Rate, PSER). The delay includes at least one of PDU delay and PDU Set delay.

In some embodiments, a specific proportion or a specific number of PDUs in the PDU Set is transmitted, such as only m PDUs in the PDU Set are transmitted and the remaining PDUs are discarded.

For example, it supports the successful transmission of x data packets among the x+1 data packets of the PDU Set; for example, it only needs to successfully transmit x data packets among the x+1 data packets. For example, after x data packets are successfully transmitted, the next data packet can be directly discarded and not transmitted.

In some embodiments, the access network device executes the FEC method to perform transmission processing on the received PDU, and the access network device supports at least one of the determined packet error rate, delay, and a specific proportion or a specific number of PDUs in the transmitted protocol data unit set PDU Set. When the application uses the FEC mechanism, the application transmits a specific number/specific proportion of PDUs in the PDU Set, and the access network device can perform transmission processing on the received PDU based on the packet error rate, or successfully transmit a specific proportion or a specific number of PDUs in the PDU Set, that is, the access network device can correctly parse the content of the PDU Set, so that the receiver can parse the content of the PDU Set when receiving a specific number/specific proportion of data packets in the PDU Set.

In the data transmission method provided by the embodiment of the present disclosure, the first FEC information from the first core network device or the terminal is received by the access network device, and the first FEC information includes at least one of the FEC indication, the FEC method, the FEC mode and the FEC parameters; according to the first FEC information, at least one of the following is performed: determining at least one of the packet error rate, the delay, the specific proportion or the specific number of PDUs in the transmitted PDU Set; executing the FEC method; determining the FEC method; sending at least one of the FEC indication, the FEC method and the FEC parameter to the terminal. Therefore, when the application uses the FEC mechanism, the application only transmits a specific number/specific proportion of PDUs in the PDU Set, and the access network device can perform transmission processing on the received PDU based on the packet error rate, or successfully transmit a specific proportion or a specific number of PDUs in the PDU Set, and can correctly parse the content of the PDU Set, so that the receiving party can parse the content of the PDU Set when receiving a specific number/specific proportion of PDUs in the PDU Set, and can support the needs of the mobile media service to transmit a specific number/proportion of data packets in the PDU Set, thereby improving the user experience.

In some embodiments, the FEC method determined in step 102 includes at least one of the following:

1) The access network device determines the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

2) The access network device determines the FEC method according to the FEC methods supported by the terminal and the FEC methods supported by the access network device.

In some embodiments, the terminal reports the FEC capability supported by the terminal to the access network device. The access network device receives the FEC capability reported by the terminal.

In some embodiments, the access network device sends a request message to the terminal, wherein the request message is used to request the FEC method and/or FEC capability supported by the terminal. In response to the request message, the terminal reports to the access network device at least one of the FEC method, FEC mode, and FEC parameter supported by the terminal.

In some embodiments, the access network device may perform the FEC method by including the following steps:

Step a, the access network device records the transmission result of the data packet received from the user plane function UPF;

Step b: The access network device performs at least one of the following according to the transmission results of the x data packets that have been transmitted:

1) When the access network device receives the x+1th data packet, if all of the x data packets that have been transmitted are successfully transmitted, the x+1th data packet is discarded; or, if not all of the x data packets that have been transmitted are successfully transmitted, the x+1th data packet is transmitted.

2) If all the x data packets that have been transmitted are successfully transmitted, the access network device sends a PDU Set sequence number and a transmission success indication to the UPF; or, if all the x data packets that have been transmitted are successfully transmitted, no transmission success indication is sent to the UPF, that is, in this case, the access network device does not perform any operation.

3) If the x transmitted data packets are not all successfully transmitted, the access network device sends the PDU Set sequence number and a transmission failure indication to the UPF, and may also send the PDU sequence number within the same PDU Set (PDU sequence number within a PDU Set). When the access network device receives the x+1th data packet, it transmits the x+1th data packet.

FIG. 2 is a second flow chart of a data transmission method provided by an embodiment of the present disclosure. The method is applied to a terminal. As shown in FIG. 2 , the method includes:

Step 201: Send first FEC information to the access and mobility management AMF and/or access network equipment, where the first FEC information includes at least one of a FEC method, a FEC mode and a FEC parameter.

In the data transmission method provided by the embodiment of the present disclosure, the first FEC information is sent to the AMF and/or the access network device through the terminal, and the first FEC information includes at least one of the FEC method, FEC mode and FEC parameters, so that the access network device can know the requirements of the terminal and at least one of the FEC method, FEC mode and FEC parameters expected or supported by the terminal. The access network device executes the FEC method based on the first FEC information to support the requirements of the mobile media service to transmit a specific number/ratio of data packets of the PDU Set, thereby improving the user experience.

In some embodiments, the method further includes: the terminal reporting the FEC capabilities supported by the terminal to the access network device.

In some embodiments, the access network device sends a request message to the terminal, wherein the request message is used to request the FEC method and/or FEC capability supported by the terminal. In response to the request message, the terminal reports to the access network device at least one of the FEC method, FEC mode, and FEC parameter supported by the terminal.

In some embodiments, the method further includes: the terminal receives at least one of the FEC indication, FEC method and FEC parameters sent by the access network device; and executes the FEC method according to at least one of the FEC indication, FEC method and FEC parameters.

FIG. 3 is a third flow chart of a data transmission method provided in an embodiment of the present disclosure. The method is applied to a first core network device, such as an SMF. As shown in FIG. 3 , the method includes:

Step 301: Receive first FEC information sent by a second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

Step 302: Send the first FEC information to the access network device.

In the data transmission method provided by the embodiment of the present disclosure, the first forward error correction FEC information sent by the second core network device is received by the first core network device, and the first FEC information includes at least one of the FEC indication, FEC method, FEC mode and FEC parameters; the first core network device sends the first FEC information to the access network device, so that the access network device learns the requirements of the terminal and at least one of the expected or supported FEC method, FEC mode and FEC parameters. The access network device executes the FEC method based on the first FEC information to support the requirements of the mobile media service to transmit a specific number/ratio of data packets of the PDU Set, thereby improving the user experience.

FIG. 4 is a fourth flow chart of a data transmission method provided in an embodiment of the present disclosure. The method is applied to a second core network device, such as a PCF. As shown in FIG. 4 , the method includes:

Step 401: Acquire first FEC information, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

Step 402: Perform at least one of the following according to the first FEC information:

Sending the first FEC information to a first core network device;

Determining a packet error rate and/or a delay according to the FEC method;

According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information.

For example, when the first FEC information includes an FEC mode and an FEC method, and the FEC mode is a wireless interface FEC, the PCF determines a packet error rate and/or a delay according to the FEC method;

When the first FEC information includes an FEC mode and an FEC method, and the FEC mode is application layer FEC, the PCF updates the PDU Set integrated processing information PSIHI according to the FEC method, or includes FEC redundancy information or FEC ratio in the PDU Set quality of service QoS information.

In the data transmission method provided by the embodiment of the present disclosure, the first FEC information is obtained through the second core network device, and at least one of the following is performed according to the first FEC information: the first FEC information is sent to the first core network device; according to the FEC method, the packet error rate and/or delay are determined; according to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set service quality QoS information. When the second core network device sends the first FEC information to the first core network device, when the application uses the FEC mechanism, the application transmits a specific number/ratio of data packets of the PDU Set, and the access network device can perform transmission processing on the received data packets based on the packet error rate, or successfully transmit a specific number/specific ratio of data packets in the PDU Set, that is, the access network device can correctly parse the content of the PDU Set, so that the receiver can parse the content of the PDU Set when receiving a specific number/specific ratio of data packets in the PDU Set, and can support the needs of mobile media services to transmit a specific number/ratio of data packets of the PDU Set, thereby improving user experience.

In some embodiments, the method also includes: the second core network device receives an event notification sent by the AMF, and the event notification includes an FEC method supported by the terminal.

In some embodiments, the FEC ratio list includes at least one of the following:

A QoS flow-level FEC ratio and a PDU Set-level FEC ratio;

Different FEC ratios associated with different PDU Set importance levels;

The FEC ratio of a QoS flow level, and different FEC ratios associated with multiple different PDU Set importance levels.

In some embodiments, the packet error rate includes at least one of the following: data packet error rate PER; PDU Set packet error rate PSER.

In some embodiments, the implementation of acquiring the first FEC information in step 201 may include at least one of the following:

Method 1: The second core network device receives the first FEC information from AF.

For example, AF sends the first FEC information to the Network Exposure Function (NEF); NEF sends the first FEC information to PCF.

Method 2: The second core network device receives the FEC indication from the AF; determines the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device.

Method 2: The second core network device receives the second FEC information sent by the terminal through SMF; determines the first FEC information based on the second FEC information.

For example, the terminal sends the second FEC information to the SMF; the SMF sends the second FEC information to the PCF; the PCF determines the first FEC information based on the second FEC information.

It can be understood that the second FEC information includes at least one of the following: at least one of a FEC method, a FEC mode and a FEC parameter.

Method 3: The second core network device determines the first FEC information based on local configuration and/or terminal subscription information.

For example, if the AF does not send the first FEC information to the PCF, the PCF may determine the first FEC information based on the local configuration and/or the terminal contract information. The PCF may include the first FEC information in the PCC rule.

In some embodiments, the AF sends the first FEC information to the PCF directly or through the NEF. Alternatively, the PCF receives the second FEC information from the SMF, and the SMF receives the second FEC information from the terminal.

The PCF may determine a transmission control mode, such as PER/PSER, based on the first FEC information. The PCF sends the PER/PSER to the SMF. The SMF sends the PER/PSER to an access network device, such as a RAN node, and the RAN node executes the PER/PSER.

The PCF may also send the PER/PSER and/or PDU Set importance to the RAN node, at which point the RAN node performs associated or corresponding PER/PSER based on the PDU Set importance in the GTP-U header of the received data packet.

Alternatively, the PCF sends the first FEC information to the SMF, and the SMF sends the first FEC information to the RAN node. The RAN node determines PER/PSER according to the first FEC information and executes the parameter. Alternatively, the RAN node determines which data packets to discard according to the first FEC information.

FIG. 5 is a fifth flowchart of a data transmission method provided by an embodiment of the present disclosure. The method is applied to application function AF. As shown in FIG. 5 , the method includes:

Step 501: Send first forward error correction FEC information to a second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter.

In the data transmission method provided by the embodiment of the present disclosure, the first forward error correction FEC information is sent to the second core network device through the AF, and the first FEC information includes at least one of the FEC indication, the FEC method, the FEC mode and the FEC parameters, so that the second core network device sends the first FEC information to the access network device. When the application uses the FEC mechanism, the application transmits a specific number/ratio of data packets of the PDU Set, and the access network device can perform transmission processing on the received data packets based on the packet error rate, or successfully transmit a specific number/specific ratio of data packets in the PDU Set, that is, the access network device can correctly parse the content of the PDU Set, so that the receiver can parse the content of the PDU Set when receiving a specific number/specific ratio of data packets in the PDU Set, and can support the needs of mobile media services to transmit a specific number/ratio of data packets in the PDU Set, thereby improving the user experience.

Here, the data transmission method provided by the embodiment of the present disclosure is illustrated by means of several specific embodiments.

Specific embodiment 1: This embodiment introduces that the AF provides the first FEC information. FIG6 is a sixth flowchart of the data transmission method provided by the embodiment of the present disclosure. As shown in FIG6, the method includes at least one of the following:

Step 601: AF sends first FEC information to NEF.

In some embodiments, the AF carries the first FEC information through a QoS generation request (e.g., Nnef_AfsessionWithQoS_Create request) or a QoS update request (e.g., Nnef_AFsessionWithQoS_Update request).

Step 602: NEF sends first FEC information to PCF.

In some embodiments, the NEF carries the first FEC information through a policy authentication generation request (e.g., Npcf_PolicyAuthorization_Create request) or a policy authentication update request (e.g., Npcf_PolicyAuthorization_Update request).

Step 603: The PCF sends a PCC rule to the SMF, where the PCC rule includes the first FEC information, or the PCC rule includes the PER or PSER determined by the PCF according to the first FEC information.

In some embodiments, the PCF carries the PCC rules through a policy control generation response (e.g., Npcf_SMPolicyControl_Create Response) or a policy control update response (Npcf_SMPolicyControl_Update Response).

It should be noted that if the first FEC information is not carried in step 301 and step 302, the PCF can generate the first FEC information based on the local configuration (Local Configuration) or the UE's contract data, and include the first FEC information in the PCC rules.

Step 604: SMF sends the first FEC information to the access network device, such as NG-RAN, through Access and Mobility Management Function (AMF), or sends PER or PSER to the access network device.

In some embodiments, the SMF sends (N2 SM information) to the NG-RAN through the AMF, and the N2 SM information includes the first FEC information, or includes the PER or PSER. After the NG-RAN receives the first FEC information, the NG-RAN determines the PER or PSER according to the FEC mode in the first FEC information. Alternatively, after the NG-RAN receives the PER or PSER, the NG-RAN executes the PER or PSER.

In some embodiments, the UPF receives a first data packet from the AF; monitors a Real-time Transport Protocol (RTP) or Secure Real-time Transport Protocol (SRTP) extension header, and if the extension header includes an FEC indication, the UPF carries the FEC indication in a User Plane Part of general packet radio service Tunnel Protocol (GTP-U) header. When the RAN node receives the FEC indication, the RAN node records the transmission result of the data packet. When the RTP or SRTP extension header received by the UPF includes an x+1th packet indication, the UPF carries the x+1th packet indication in the GTP-U header, and when the RAN node receives the x+1th packet indication, the RAN node performs different operations according to the transmission result of the x packets that have been transmitted. If all the previous packets are successfully transmitted, the RAN node discards the x+1th packet, otherwise, the RAN node transmits the x+1th packet.

Specific embodiment 2: This embodiment introduces the terminal providing the second FEC information. FIG. 7 is a flow chart of the seventh data transmission method provided by the embodiment of the present disclosure. As shown in FIG. 7 , the method includes the following steps:

Step 701: The terminal sends a PDU session establishment request/PDU session modification request to the SMF, and carries the second FEC information in the request.

Step 702: SMF sends second FEC information to PCF.

In some embodiments, the SMF sends a policy authentication generation request (e.g., Npcf_PolicyAuthorization_Create request)/policy authentication update request (e.g., Npcf_PolicyAuthorization_Update request) to the PCF, and carries the second FEC information in the policy authentication generation request/policy authentication update request.

Step 703: The PCF determines the first FEC information according to the operator policy and the second FEC information, etc. The PCF sends the first FEC information to the SMF.

In some embodiments, the PCF determines the PER or PSER based on the first FEC information.

In some embodiments, the PCF carries the first FEC information through a policy control generation response (e.g., Npcf_PolicyAuthorization_Create response) or a policy control update response (Npcf_PolicyAuthorization_Update response).

Step 704: SMF sends the first FEC information to an access network device, such as NG-RAN, through AMF.

In some embodiments, the SMF sends (N2 SM information) to the NG-RAN through the AMF, and the N2 SM information includes the first FEC information.

Step 705: SMF sends a PDU session modification command/PDU session establishment acceptance message to the terminal, and the PDU session modification command/PDU session establishment acceptance message carries the first FEC information.

Specific embodiment 3, in this embodiment, in addition to sending FEC parameters to the RAN node, the SMF also carries FEC parameters in the N4 session establishment message or N4 session modification message sent to the UPF. After the UPF receives the FEC parameters, the UPF only transmits x PDUs of the PDU Set according to the FEC ratio, for example, the ratio is 1/(X+1), caches the x+1th PDU locally, and stores the PDU Set Sequence Number of the PDU Set to which the PDU belongs.

After receiving the FEC parameters, the RAN node records the transmission results of each PDU in the PDU Set. The RAN node's actions include at least one of the following:

Mode 1: When all x PDUs are successfully transmitted, the RAN node can behave as follows:

Action (1): Send PDU Set Sequence Number and transmission result (success) to SMF/UPF. If the RAN node notifies SMF of the transmission result, SMF sends the above information to UPF. At this time, after receiving the information, UPF deletes the x+1th packet in the local cache.

Action (2): Do not perform any operation. The UPF starts a timer locally. If the timer times out and the UPF does not receive any notification from the RAN node, the UPF deletes the x+1th packet in the local cache.

Method 2: If a PDU in a PDU Set fails to be transmitted, the RAN node sends the PDU Set Sequence Number and the transmission result (failure) to the SMF/UPF, and may also carry the PDU sequence number within a PDU Set. If the RAN node notifies the SMF of the transmission result, the SMF sends the above information to the UPF. At this time, the UPF transmits the x+1th packet.

Specific embodiment 4: This embodiment introduces a method in which the AF requests the network to perform FEC and the RAN node selects FEC. FIG8 is a flowchart of the eighth data transmission method provided by the embodiment of the present disclosure. As shown in FIG8, the method includes the following steps:

Step 801, AF sends Nnef_AfsessionWithQoS_Create request/Nnef_AFsessionWithQoS_Update request (FEC indication) to NEF, requesting the network to perform FEC.

Step 802, NEF sends Npcf_PolicyAuthorization_Create request/Npcf_PolicyAuthorization_Update request (FEC indication) to PCF.

Step 803: PCF sends Npcf_SMPolicyControl_Create Response/Npcf_SMPolicyControl_Update Response (PCC rules) to SMF. PCC rules include FEC indication.

Step 804: SMF sends N2 SM information (FEC indication) to NG-RAN through AMF.

Step 805: RAN sends an RRC message to UE, and the message carries FEC indication or FEC method. This message is an optional message. For example, if the UE and RAN node carry FEC indication or FEC method in the SDAP header, or the UE and RAN node can determine the FEC method to be used according to the encoding method of the data, then this message does not need to be executed.

Step 806: The UE and the RAN node execute the FEC method.

In the above step 805, if the UE supports one FEC method, the RRC message sent by the RAN node to the UE may include an FEC indication. If the UE supports multiple FEC methods, the RAN node selects an FEC method according to the FEC methods supported by itself and the FEC methods supported by the UE. In this case, in step 805, the RRC message sent by the RAN node to the UE includes the FEC method.

The implementation manner in which the RAN node obtains the FEC method supported by the UE includes at least one of the following:

Mode 1: The UE sends an RRC message to the RAN node, and the message parameters are the FEC method, or the FEC capability and the FEC method.

Mode 2: The UE sends an RRC message to the RAN node, and the message parameter is the FEC capability, that is, the UE supports the FEC capability. The RAN node sends an RRC message to the UE, and the message parameter is the FEC method request. The UE sends an RRC message to the RAN node, and the message parameter is the FEC method.

Specific embodiment 5: This embodiment introduces the AF requesting the network to execute a specific FEC method. FIG9 is a ninth flowchart of the data transmission method provided by the embodiment of the present disclosure. As shown in FIG9 , the method includes the following steps:

Step 901, AF sends Nnef_AfsessionWithQoS_Create request/Nnef_AFsessionWithQoS_Update request (FEC method) to NEF, requesting the network to perform FEC.

Step 902, NEF sends Npcf_PolicyAuthorization_Create request/Npcf_PolicyAuthorization_Update request (FEC method) to PCF.

Step 903: PCF sends Npcf_SMPolicyControl_Create Response/Npcf_SMPolicyControl_Update Response (PCC rules) to SMF. PCC rules include FEC methods.

Step 904: SMF sends N2 SM information (FEC method) to NG-RAN via AMF.

Step 905: RAN sends an RRC message to UE, and the message carries FEC indication or FEC method. This message is an optional message. For example, if the UE and RAN node carry FEC indication or FEC method in the SDAP header, or the UE and RAN node can determine the FEC method to be used according to the encoding method of the data, then this message does not need to be executed.

Step 906: The UE and the RAN node execute the FEC method.

In the above step 905, if the UE supports one FEC method and it is the FEC method received by the RAN node in step 904, the RRC message sent by the RAN node to the UE may include the FEC indication. If the UE supports multiple FEC methods, the RAN node determines the FEC method supported by the UE based on the FEC method supported by itself and the FEC method supported by the UE. If both the UE and the RAN support the FEC method received in step 904, then in step 905, the RRC message sent by the RAN node to the UE includes the FEC method (i.e., the method in step 904).

If the UE and/or RAN node does not support the FEC method received by the RAN node in step 904, the RAN node returns N2 SM information to the SMF, and the message carries an indication that the FEC method is not supported. The SMF returns the indication to the PCF, and the PCF returns the indication to the AF.

Specific embodiment 6. In this embodiment, in addition to providing the FEC method, the AF also provides parameters related to the FEC method, such as FEC ratio, FEC ratio and PDU Set importance, etc. FIG10 is a flowchart of the data transmission method provided by the embodiment of the present disclosure. As shown in FIG10, the method includes the following steps:

Step 1001. AF sends Nnef_AfsessionWithQoS_Create request/Nnef_AFsessionWithQoS_Update request (FEC method, FEC parameters) to NEF, requesting the network to perform FEC.

Step 1002, NEF sends Npcf_PolicyAuthorization_Create request/Npcf_PolicyAuthorization_Update request (FEC method, FEC parameters) to PCF.

Step 1003: PCF sends Npcf_SMPolicyControl_Create Response/Npcf_SMPolicyControl_Update Response (PCC rules) to SMF. PCC rules include FEC methods and FEC parameters.

Step 1004: SMF sends N2 SM information (FEC method, FEC parameters) to NG-RAN through AMF.

Step 1005: RAN sends an RRC message to UE, and the message carries FEC indication or FEC method. It may also carry FEC parameters. This message is an optional message. For example, if the UE and RAN node carry FEC indication or FEC method, FEC parameters in the SDAP header, or the UE and RAN node can determine the FEC method or FEC method and FEC parameters to be used according to the encoding method of the data, then this message does not need to be executed.

Step 1006: The UE and the RAN node execute the FEC method.

Specific embodiment 7, PCF determines FEC method in this embodiment. FIG11 is a flow chart of the data transmission method provided by the embodiment of the present disclosure. As shown in FIG11, the method includes the following steps:

Step 1101, AF sends Nnef_AfsessionWithQoS_Create request/Nnef_AFsessionWithQoS_Update request (FEC indication) to NEF, requesting the network to perform FEC.

Step 1102, NEF sends Npcf_PolicyAuthorization_Create request/Npcf_PolicyAuthorization_Update request (FEC indication) to PCF.

Step 1103: PCF determines the FEC method based on the UE capability (e.g., support for FEC capability, or support for FEC capability and supported FEC method) and the locally configured RAN node capability (e.g., support for FEC capability, or support for FEC capability and supported FEC method). PCF sends Npcf_SMPolicyControl_Create Response/Npcf_SMPolicyControl_Update Response (PCC rules) to SMF. PCC rules include FEC methods.

Step 1104. SMF sends N2 SM information (FEC method) to NG-RAN through AMF.

Step 1105: RAN sends an RRC message to UE, and the message carries the FEC method. This message is an optional message. For example, if the UE and RAN node carry the FEC method in the SDAP header, or the UE and RAN node can determine the FEC method to be used according to the encoding method of the data, then this message does not need to be executed.

Step 1106: The UE and the RAN node execute the FEC method.

FIG. 12 is a schematic diagram of a process of obtaining UE capabilities by a PCF according to an embodiment of the present disclosure. As shown in FIG. 12 , the method includes the following steps:

Step 1201: The UE sends a registration request to the AMF, where the message carries FEC capability, or FEC capability and supported FEC method, or FEC method.

Step 1202: PCF sends an event subscription request to AMF. The message carries the UE identifier and the event type is FEC.

Step 1203: AMF sends an event notification to PCF, and the message carries the FEC method supported by UE.

Specific embodiment 8: In this embodiment, the PCF determines the FEC method. FIG13 is a flowchart of the data transmission method provided by the embodiment of the present disclosure. As shown in FIG13, the method includes the following steps:

Step 1301, AF sends Nnef_AfsessionWithQoS_Create request/Nnef_AFsessionWithQoS_Update request (FEC method, or FEC method and FEC parameters) to NEF, requesting the network to perform FEC.

Step 1302: NEF sends Npcf_PolicyAuthorization_Create request/Npcf_PolicyAuthorization_Update request (FEC method, or FEC method and FEC parameters) to PCF. PCF decides whether to accept the request based on UE and RAN capabilities. If not, it skips steps 1303 to 1306 and returns a rejection message to NEF, which then returns a rejection message to AF.

Step 1303: PCF sends Npcf_SMPolicyControl_Create Response/Npcf_SMPolicyControl_Update Response (PCC rules) to SMF. PCC rules include FEC methods, or FEC methods and FEC parameters.

Step 1304: SMF sends N2 SM information (FEC method, or FEC method and FEC parameters) to NG-RAN through AMF.

Step 1305: RAN sends an RRC message to the UE, which carries an FEC indication or an FEC method. It may also carry FEC parameters. This message is an optional message. For example, if the UE and the RAN node carry an FEC indication or an FEC method, FEC parameters in the SDAP header, or the UE and the RAN node can determine the FEC method or the FEC method and FEC parameters to be used according to the encoding method of the data, then this message does not need to be executed.

Step 1306: The UE and the RAN node execute the FEC method.

Embodiment 9: In the above embodiment, the RAN node uses the FEC function under the triggering of the network. In this embodiment, the RAN node decides to use the FEC function according to PER, radio resource status, UE capability, etc. The RAN node determines the FEC method, or the FEC method and FEC parameters.

When the RAN node sends data to the UE, the FEC method, or the FEC method and FEC parameters, are carried in the SDAP header. The UE executes the FEC method and recovers the data according to the information in the SDAP header. Alternatively, the RAN node sends an RRC message to the UE, which carries the FEC method, or the FEC method and FEC parameters, and then the RAN node and the UE start to execute the FEC method on the data.

Embodiment 10: In addition to the FEC indication (e.g., Embodiment 4, Embodiment 7), FEC method (e.g., Embodiment 5) and other parameters mentioned in the above embodiments, AF may also provide FEC mode. The process of AF providing parameters is the same as that of the above embodiments 4, 5, 6 and 7. This embodiment mainly introduces the method of using FEC mode parameters.

FEC modes include radio interface FEC and application layer FEC. Radio interface FEC refers to the FEC method executed between the RAN node and the UE. Application layer FEC refers to the FEC method executed between the application server and the application in the UE, such as executing the FEC method for PDU or PDU Set.

When the PCF receives the FEC mode, the PCF behaves differently depending on the mode:

If it is radio interface FEC, the PCF takes the FEC method as a new PDU Set QoS parameter and sends it to the SMF, which sends the parameter to the RAN node, and the FEC method is executed between the RAN node and the UE. Alternatively, the PCF determines the PDU Set Error Rate and/or PDU Set Delay Budget based on the FEC method.

If it is application layer FEC, PCF updates PSIHI information according to FEC method or includes FEC redundancy information or FEC ratio in PDU Set QoS information. RAN node or UE can transmit only a specific ratio of PDUs included in PDU Set according to FEC redundancy information or FEC ratio. FEC ratio is the ratio of redundant packets generated by AF. For example, AF sends 1 redundant packet after sending x data packets, then the ratio is 1/(X+1).

FIG. 14 is a schematic diagram of the structure of an access network device provided in an embodiment of the present disclosure. As shown in FIG. 14 , the access network device includes a memory 1420, a transceiver 1400, and a processor 1410, wherein:

The memory 1420 is used to store computer programs; the transceiver 1400 is used to send and receive data under the control of the processor 1410; the processor 1410 is used to read the computer program in the memory 1420 and perform the following operations:

Receiving first forward error correction (FEC) information from a first core network device or a terminal, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

According to the first FEC information, at least one of the following is performed:

Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted;

Execute FEC method;

Determine the FEC method;

At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal.

Specifically, the transceiver 1400 is used to receive and send data under the control of the processor 1410 .

Among them, in Figure 14, the bus architecture can include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1410 and various circuits of memory represented by memory 1420 are linked together. The bus architecture can also link various other circuits such as peripherals, regulators, and power management circuits together, which are all well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1400 can be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission media include transmission media such as wireless channels, wired channels, and optical cables. The processor 1410 is responsible for managing the bus architecture and general processing, and the memory 1420 can store data used by the processor 1410 when performing operations.

Processor 1410 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

In some embodiments, the determining the FEC method includes at least one of the following:

Determine the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

The FEC method is determined according to the FEC method supported by the terminal and the FEC method supported by the access network device.

It should be noted here that the above-mentioned access network device provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the above-mentioned execution subject is the access network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

FIG. 15 is a schematic diagram of the structure of a terminal provided in an embodiment of the present disclosure. As shown in FIG. 15 , the terminal includes a memory 1520, a transceiver 1500, and a processor 1510, wherein:

The memory 1520 is used to store computer programs; the transceiver 1500 is used to send and receive data under the control of the processor 1510; the processor 1510 is used to read the computer program in the memory 1520 and perform the following operations:

Send first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, wherein the first FEC information includes at least one of an FEC method, an FEC mode and an FEC parameter.

Specifically, the transceiver 1500 is used to receive and send data under the control of the processor 1510 .

In FIG. 15 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1510 and various circuits of memory represented by memory 1520 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1500 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium includes a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 1510 is responsible for managing the bus architecture and general processing, and the memory 1520 may store data used by the processor 1510 when performing operations.

Processor 1510 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

In some embodiments, the operations further include:

Receiving at least one of an FEC indication, an FEC method, and an FEC parameter sent by the access network device;

The FEC method is executed according to at least one of the FEC indication, the FEC method and the FEC parameter.

It should be noted here that the above-mentioned terminal provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

FIG. 16 is a schematic diagram of the structure of a first core network device provided in an embodiment of the present disclosure. As shown in FIG. 16 , the first core network device includes a memory 1620, a transceiver 1600, and a processor 1610, wherein:

The memory 1620 is used to store computer programs; the transceiver 1600 is used to send and receive data under the control of the processor 1610; the processor 1610 is used to read the computer program in the memory 1620 and perform the following operations:

Receive first forward error correction FEC information sent by the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

Send the first FEC information to the access network device.

Specifically, the transceiver 1600 is used to receive and send data under the control of the processor 1610 .

Among them, in Figure 16, the bus architecture can include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1610 and various circuits of memory represented by memory 1620 are linked together. The bus architecture can also link various other circuits such as peripherals, regulators, and power management circuits together, which are all well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1600 can be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission media include transmission media such as wireless channels, wired channels, and optical cables. The processor 1610 is responsible for managing the bus architecture and general processing, and the memory 1620 can store data used by the processor 1610 when performing operations.

Processor 1610 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

It should be noted here that the above-mentioned first core network device provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the first core network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

FIG. 17 is a schematic diagram of the structure of a second core network device provided in an embodiment of the present disclosure. As shown in FIG. 17 , the second core network device includes a memory 1720, a transceiver 1700, and a processor 1710, wherein:

The memory 1720 is used to store computer programs; the transceiver 1700 is used to send and receive data under the control of the processor 1710; the processor 1710 is used to read the computer program in the memory 1720 and perform the following operations:

Acquire first forward error correction FEC information, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

According to the first FEC information, at least one of the following is performed:

Sending the first FEC information to a first core network device;

Determining a packet error rate and/or a delay according to the FEC method;

According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information.

Specifically, the transceiver 1700 is used to receive and send data under the control of the processor 1710 .

Among them, in Figure 17, the bus architecture can include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1710 and various circuits of memory represented by memory 1720 are linked together. The bus architecture can also link various other circuits such as peripherals, regulators, and power management circuits together, which are all well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1700 can be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission media include transmission media such as wireless channels, wired channels, and optical cables. The processor 1710 is responsible for managing the bus architecture and general processing, and the memory 1720 can store data used by the processor 1710 when performing operations.

Processor 1710 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

In some embodiments, the obtaining of the first forward error correction (FEC) information includes at least one of the following:

receiving said first FEC information from an application function AF;

Receiving the FEC indication from the AF; determining the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

Receiving second FEC information sent by a terminal through an SMF; determining the first FEC information according to the second FEC information;

The first FEC information is determined according to local configuration and/or terminal subscription information.

It should be noted here that the above-mentioned second core network device provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the above-mentioned execution subject is the second core network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

FIG. 18 is a schematic diagram of the structure of an AF provided by an embodiment of the present disclosure. As shown in FIG. 18 , the AF includes a memory 1820, a transceiver 1800, and a processor 1810, wherein:

The memory 1820 is used to store computer programs; the transceiver 1800 is used to send and receive data under the control of the processor 1810; the processor 1810 is used to read the computer program in the memory 1820 and perform the following operations:

First forward error correction FEC information is sent to the second core network device, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter.

Specifically, the transceiver 1800 is used to receive and send data under the control of the processor 1810.

Among them, in Figure 18, the bus architecture can include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1810 and various circuits of memory represented by memory 1820 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits together, which are all well known in the art, so they are not further described herein. The bus interface provides an interface. The transceiver 1800 can be a plurality of components, that is, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, and these transmission media include transmission media such as wireless channels, wired channels, and optical cables. The processor 1810 is responsible for managing the bus architecture and general processing, and the memory 1820 can store data used by the processor 1810 when performing operations.

Processor 1810 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

It should be noted here that the above-mentioned AF provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the above-mentioned execution subject is AF, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

The embodiments of the present disclosure also provide a data transmission device that can support the needs of mobile media services to transmit a specific number/ratio of data packets of PDU Set, thereby improving user experience. It is understandable that the methods and devices provided in the embodiments of the present disclosure are based on the same disclosed concept. Since the principles of solving problems by the methods and devices are similar, the implementation of the devices and methods can refer to each other, and the repeated parts will not be repeated.

FIG19 is a schematic diagram of a data transmission device provided in an embodiment of the present disclosure, and the data transmission device is applied to an access network device. As shown in FIG19 , the data transmission device includes a first receiving module 1901 and a first executing module 1902, wherein:

The first receiving module 1901 is used to receive first forward error correction FEC information from a first core network device or a terminal, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

The first execution module 1902 is configured to execute at least one of the following according to the first FEC information:

Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted;

Execute FEC method;

Determine the FEC method;

At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal.

In some embodiments, the first execution module 1902 is specifically used for at least one of the following:

Determine the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

The FEC method is determined according to the FEC method supported by the terminal and the FEC method supported by the access network device.

In some embodiments, the first receiving module 1901 is further used to receive the FEC capability reported by the terminal.

In some embodiments, the apparatus further comprises:

The first sending module is used to send request information to the terminal, where the request information is used to request the FEC method and/or FEC capability supported by the terminal.

Specifically, the above-mentioned data transmission device provided by the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is an access network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

FIG20 is a second structural schematic diagram of a data transmission device provided in an embodiment of the present disclosure, and the data transmission device is applied to a terminal. As shown in FIG20 , the data transmission device includes:

The second sending module 2001 is used to send the first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, and the first FEC information includes at least one of the FEC method, FEC mode and FEC parameters.

In some embodiments, the apparatus further comprises:

The reporting module is used to report the FEC capabilities supported by the terminal to the access network device.

In some embodiments, the apparatus further comprises:

The second receiving module is used to receive the request information sent by the access network device, where the request information is used to request the FEC method and/or FEC capability supported by the terminal.

In some embodiments, the apparatus further comprises:

A third receiving module, configured to receive at least one of an FEC indication, an FEC method and an FEC parameter sent by the access network device;

The second execution module is used to execute the FEC method according to at least one of the FEC indication, the FEC method and the FEC parameter.

Specifically, the above-mentioned data transmission device provided by the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

FIG21 is a third structural diagram of a data transmission device provided in an embodiment of the present disclosure, and the data transmission device is applied to a first core network device. As shown in FIG21 , the data transmission device includes:

The fourth receiving module 2101 is used to receive first forward error correction FEC information sent by the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter;

The third sending module 2102 is used to send the first FEC information to the access network device.

Specifically, the above-mentioned data transmission device provided by the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the first core network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

FIG22 is a fourth structural diagram of a data transmission device provided in an embodiment of the present disclosure, and the data transmission device is applied to a second core network device. As shown in FIG22 , the data transmission device includes:

The acquisition module 2201 is used to acquire first forward error correction FEC information, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter;

The third execution module 2202 is configured to execute at least one of the following according to the first FEC information:

Sending the first FEC information to a first core network device;

Determining a packet error rate and/or a delay according to the FEC method;

According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information.

In some embodiments, the acquisition module 2201 is specifically used for at least one of the following:

receiving said first FEC information from an application function AF;

Receiving the FEC indication from the AF; determining the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device;

Receiving second FEC information sent by a terminal through an SMF; determining the first FEC information according to the second FEC information;

The first FEC information is determined according to local configuration and/or terminal subscription information.

In some embodiments, the apparatus further comprises:

The fifth receiving module is used to receive the event notification sent by AMF, and the event notification includes the FEC method supported by the terminal.

Specifically, the above-mentioned data transmission device provided by the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the second core network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

FIG23 is a fifth structural diagram of a data transmission device provided in an embodiment of the present disclosure, and the data transmission device is applied to AF. As shown in FIG23 , the data transmission device includes:

The fourth sending module 2301 is used to send first forward error correction FEC information to the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter.

Specifically, the above-mentioned data transmission device provided by the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is AF, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

It should be noted that the division of units/modules in the above-mentioned embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, the functional units in the various embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the relevant technology or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

In some embodiments, a non-transitory readable storage medium is further provided, wherein the non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the data transmission method provided by the above-mentioned method embodiments.

Specifically, the above-mentioned non-transitory readable storage medium provided in the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

It should be noted that the non-transitory readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

In some embodiments, a processor-readable storage medium is also provided, wherein the processor-readable storage medium stores a computer program, wherein the computer program is used to enable a processor to execute the data transmission method provided by each method embodiment in which the execution subject is an access network device.

Specifically, the processor-readable storage medium provided in the embodiments of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects that are the same as those in the method embodiments will not be described in detail herein.

In some embodiments, a computer-readable storage medium is also provided, wherein the computer-readable storage medium stores a computer program, and the computer program is used to enable a computer to execute the data transmission method provided by each method embodiment in which the execution subject is a core network device.

Specifically, the above-mentioned computer-readable storage medium provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

In some embodiments, a communication device is further provided, wherein a computer program is stored in the communication device, and the computer program is used to enable the communication device to execute the data transmission method provided by the above-mentioned method embodiments.

Specifically, the above-mentioned communication device provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

In some embodiments, a chip product is further provided, wherein a computer program is stored in the chip product, and the computer program is used to enable the chip product to execute the data transmission methods provided by the above-mentioned method embodiments.

Specifically, the above-mentioned chip product provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

The present disclosure is described with reference to the flowchart and/or block diagram of the method, device (system), and computer program product according to the embodiment of the present disclosure. It should be understood that each process and/or box in the flowchart and/or block diagram, as well as the combination of the process and/or box in the flowchart and/or block diagram can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one process or multiple processes in the flowchart and/or one box or multiple boxes in the block diagram.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims (27)

A data transmission method, applied to an access network device, comprising: Receiving first forward error correction (FEC) information from a first core network device or a terminal, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; According to the first FEC information, at least one of the following is performed: Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted; Execute FEC method; Determine the FEC method; At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal. The data transmission method according to claim 1, wherein the FEC method is determined, comprising at least one of the following: Determine the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device; The FEC method is determined according to the FEC method supported by the terminal and the FEC method supported by the access network device. The data transmission method according to claim 2, wherein the method further comprises: receiving the FEC capability reported by the terminal. The data transmission method according to any one of claims 1 to 3, wherein the method further comprises: Sending request information to the terminal, where the request information is used to request an FEC method and/or FEC capability supported by the terminal. A data transmission method, applied to a terminal, comprising: Send first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, wherein the first FEC information includes at least one of an FEC method, an FEC mode and an FEC parameter. The data transmission method according to claim 5, wherein the method further comprises: The FEC capabilities supported by the terminal reported to the access network device. The data transmission method according to claim 5, wherein the method further comprises: Receive request information sent by the access network device, where the request information is used to request an FEC method and/or FEC capability supported by the terminal. The data transmission method according to any one of claims 5 to 7, wherein the method further comprises: Receiving at least one of an FEC indication, an FEC method, and an FEC parameter sent by the access network device; The FEC method is executed according to at least one of the FEC indication, the FEC method and the FEC parameter. A data transmission method, applied to a first core network device, the method comprising: Receive first forward error correction FEC information sent by the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; Send the first FEC information to the access network device. A data transmission method, applied to a second core network device, the method comprising: Acquire first forward error correction FEC information, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; According to the first FEC information, at least one of the following is performed: Sending the first FEC information to a first core network device; Determining a packet error rate and/or a delay according to the FEC method; According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information. The data transmission method according to claim 10, wherein the obtaining of the first forward error correction (FEC) information comprises at least one of the following: receiving said first FEC information from an application function AF; Receiving the FEC indication from the AF; determining the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device; Receiving second FEC information sent by a terminal through an SMF; determining the first FEC information according to the second FEC information; The first FEC information is determined according to local configuration and/or terminal subscription information. The data transmission method according to claim 10, wherein the method further comprises: Receive an event notification sent by AMF, where the event notification includes the FEC method supported by the terminal. A data transmission method, applied to an application function AF, the method comprising: First forward error correction FEC information is sent to the second core network device, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter. An access network device comprises a memory, a transceiver and a processor; The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: Receiving first forward error correction (FEC) information from a first core network device or a terminal, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; According to the first FEC information, at least one of the following is performed: Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted; Execute FEC method; Determine the FEC method; At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal. The access network device according to claim 14, wherein the FEC method is determined, comprising at least one of the following: Determine the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device; The FEC method is determined according to the FEC method supported by the terminal and the FEC method supported by the access network device. A terminal comprises a memory, a transceiver and a processor; The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: Send first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, wherein the first FEC information includes at least one of an FEC method, an FEC mode and an FEC parameter. The terminal according to claim 16, wherein the operation further comprises: Receiving at least one of an FEC indication, an FEC method, and an FEC parameter sent by the access network device; The FEC method is executed according to at least one of the FEC indication, the FEC method and the FEC parameter. A first core network device comprises a memory, a transceiver and a processor; The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: Receive first forward error correction FEC information sent by the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; Send the first FEC information to the access network device. A second core network device, comprising a memory, a transceiver and a processor; The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: Acquire first forward error correction FEC information, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; According to the first FEC information, at least one of the following is performed: Sending the first FEC information to a first core network device; Determining a packet error rate and/or a delay according to the FEC method; According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information. The second core network device according to claim 19, wherein the acquiring the first forward error correction FEC information comprises at least one of the following: receiving said first FEC information from an application function AF; Receiving the FEC indication from the AF; determining the FEC method according to the FEC indication, the FEC method supported by the terminal and the FEC method supported by the access network device; Receiving second FEC information sent by a terminal through an SMF; determining the first FEC information according to the second FEC information; The first FEC information is determined according to local configuration and/or terminal subscription information. An AF includes a memory, a transceiver and a processor; The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: First forward error correction FEC information is sent to the second core network device, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter. A data transmission device, applied to access network equipment, comprising: A first receiving module, configured to receive first forward error correction FEC information from a first core network device or a terminal, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; A first execution module is configured to execute at least one of the following according to the first FEC information: Determine at least one of a packet error rate, a delay, a specific ratio or a specific number of PDUs in a protocol data unit set PDU Set transmitted; Execute FEC method; Determine the FEC method; At least one of an FEC indication, an FEC method, and an FEC parameter is sent to the terminal. A data transmission device, applied to a terminal, comprising: The second sending module is used to send the first forward error correction FEC information to the access and mobility management AMF and/or access network equipment, and the first FEC information includes at least one of the FEC method, FEC mode and FEC parameters. A data transmission device, applied to a first core network device, comprising: A fourth receiving module, configured to receive first forward error correction FEC information sent by a second core network device, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; The third sending module is used to send the first FEC information to the access network device. A data transmission device, applied to a second core network device, comprising: An acquisition module, configured to acquire first forward error correction FEC information, wherein the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode, and an FEC parameter; A third execution module is configured to execute at least one of the following according to the first FEC information: Sending the first FEC information to a first core network device; Determining a packet error rate and/or a delay according to the FEC method; According to the FEC method, the protocol data unit set PDU Set integration processing information PSIHI is updated, or FEC redundancy information or FEC ratio is included in the PDU Set quality of service QoS information. A data transmission device, applied to AF, comprising: The fourth sending module is used to send first forward error correction FEC information to the second core network device, where the first FEC information includes at least one of an FEC indication, an FEC method, an FEC mode and an FEC parameter. A non-transitory readable storage medium storing a computer program, wherein the computer program is used to cause a processor to execute the data transmission method described in any one of claims 1 to 4, or the data transmission method described in any one of claims 5 to 8, or the data transmission method described in claim 9, or the data transmission method described in any one of claims 10 to 12, or the data transmission method described in claim 13.