WO2024022333A1 - Reflective qos control method, upf entity, communication system, and storage medium - Google Patents

Abstract

The present disclosure relates to the field of communications. Provided are a reflective QoS control method, a UPF entity, a communication system, and a storage medium. The reflective QoS control method comprises: extracting first indication information and parameter values m of continuous reflection parameters from first QER information, which is sent from an SMF entity and is associated with a preset SDF; in a plurality of downlink data packets to be sent belonging to the SDF, adding the first indication information to each downlink data packet among the first m downlink data packets; sending to a radio access network device the m downlink data packets, to which the first indication information is added; and directly sending to the radio access network device downlink data packets among the plurality of downlink data packets to be sent other than the first m downlink data packets.

Description

Reflective QoS control method, UPF entity, communication system and storage medium

Cross-references to related applications

This application is based on the application with CN application number 202210892560.7 and the filing date is July 27, 2022, and claims its priority. The disclosure content of the CN application is hereby incorporated into this application as a whole.

Technical field

The present disclosure relates to the field of communication, and in particular to a reflective QoS (Quality of Service) control method, UPF (User Plane Function) entity, communication system and storage medium.

Background technique

Currently, when 5GC (5G Core, 5G core network) needs to use reflective QoS for a certain SDF (Service Data Flow, business data flow), it needs to send QER (QoS Enforcement Rule, QoS execution rule) to the UPF entity. The RQI (Reflective QoS Indication, reflective QoS indicator) field in QER is set to "1". After receiving this information, the UPF entity will forward all downlink data packets belonging to the SDF in the header of the downlink data packet. Add the information "RQI=1" and send it to the RAN (Radio Access Network) equipment and UE (User Equipment) so that the RAN and UE can continuously reflect QoS on the downlink data packets belonging to the SDF. Assure.

Contents of the invention

According to a first aspect of an embodiment of the present disclosure, a reflective QoS control method is provided, executed by a user plane function UPF entity, including: executing a first QoS associated with a preset service data flow SDF sent from a session management function SMF entity From the regular QER information, extract the first indication information and the parameter value m of the continuous reflection parameter; among the multiple downlink data packets to be sent belonging to the SDF, for each downlink data packet in the first m downlink data packets Add the first indication information; send m downlink data packets with the first indication information added to the wireless access network device; remove the first m downlink data from the plurality of downlink data packets to be sent. Other downlink data packets other than the packet are directly sent to the wireless access network device.

In some embodiments, the first indication information is a reflection QoS indicator RQI with a value of 1.

In some embodiments, extracting the first indication information and the parameter value m of the continuous reflection parameter from the first QER information associated with the preset SDF sent by the SMF entity includes: receiving the first indication information and the parameter value m of the continuous reflection parameter through the preset interface. After the SMF entity sends the first QER information through the first signaling, the SMF entity extracts the first indication information and the parameter value m of the continuous reflection parameter from the first QER information.

In some embodiments, the first signaling includes Packet Forwarding Control Protocol PFCP creation signaling or PFCP modification signaling.

In some embodiments, the second indication information is extracted from the second QER information associated with the SDF sent by the SMF entity; and the second indication information is added to the downlink data packet currently to be sent belonging to the SDF. Instruction information: sending the downlink data packet with the second indication information added to the wireless access network device.

In some embodiments, the second indication information is a reflection QoS indicator RQI with a value of 0.

In some embodiments, extracting the second indication information from the second QER information associated with the SDF sent by the SMF entity includes: receiving the second signaling by the SMF entity through a preset interface. After the second QER information is sent, the second indication information is extracted from the second QER information.

In some embodiments, the second signaling includes PFCP modification signaling.

In some embodiments, the preset interface is an N4 interface provided between the SMF entity and the UPF entity.

According to a second aspect of an embodiment of the present disclosure, a user plane function UPF entity is provided, including: a first processing module configured to send a first QoS associated with a preset service data flow SDF from the session management function SMF entity From the execution rule QER information, the first indication information and the parameter value m of the continuous reflection parameter are extracted; the second processing module is configured to select the first m downlink data packets among the multiple downlink data packets to be sent belonging to the SDF. Each downlink data packet in the data packet adds the first indication information; a third processing module is configured to send m downlink data packets with the first indication information added to the wireless access network device, and Among the multiple downlink data packets, other downlink data packets except the first m downlink data packets are directly sent to the wireless access network device.

According to a third aspect of an embodiment of the present disclosure, a user plane function UPF entity is provided, including: a memory configured to store instructions; a processor coupled to the memory, and the processor is configured to execute the implementation based on the instructions stored in the memory as described above The method described in any embodiment.

According to a fourth aspect of an embodiment of the present disclosure, a communication system is provided, including: a UPF entity as described in any of the above embodiments; an SMF entity configured to be a preset state when continuous reflective QoS services are required. The service data flow SDF configures the parameter value m of the continuous reflection parameter, and sends the first QER information associated with the SDF to the UPF entity, where the first QER information includes the first indication information and the continuous reflection parameter The parameter value m; the wireless access network device is configured to receive the downlink signal sent by the UPF entity. After the data packet, if the downlink data packet belongs to the SDF and the first indication information is added, QoS guarantee is performed on the downlink data. If the downlink data packet belongs to the SDF and the first indication information is added, When the number reaches m, in the case where the first indication information is not added to the subsequently received downlink data packets belonging to the SDF, the subsequent received downlink data packets belonging to the SDF are processed. Reflective QoS guarantee.

In some embodiments, the first indication information is a reflection QoS indicator RQI with a value of 1.

In some embodiments, the SMF entity is configured to use first signaling to send the first QER information to the UPF entity through a preset interface.

In some embodiments, the first signaling includes Packet Forwarding Control Protocol PFCP creation signaling or PFCP modification signaling.

In some embodiments, the SMF entity is configured to send second QER information associated with the SDF to the UPF entity in the event that continuous reflective QoS services need to be terminated, wherein the second QER information including second indication information; the wireless access network device is configured to, after receiving the downlink data packet sent by the UPF entity, if the downlink data packet belongs to the SDF and adds the second indication information, then Stop performing QoS guarantee on the downlink data, and stop performing reflective QoS guarantee on the subsequently received downlink data packets belonging to the SDF.

In some embodiments, the second indication information is a reflection QoS indicator RQI with a value of 0.

In some embodiments, the SMF entity is configured to use second signaling to send the second QER information to the UPF entity through a preset interface.

In some embodiments, the second signaling includes PFCP modification signaling.

In some embodiments, the above system further includes a user terminal, wherein the wireless access network device is configured to send the received downlink data packet to the corresponding user terminal; the user terminal is configured to receive After the downlink data packet is sent by the wireless access network device, if the downlink data packet belongs to the SDF and the first indication information is added, QoS guarantee is performed on the downlink data. If the downlink data packet belongs to the SDF and the first indication information is added, When the number of downlink data packets of the first indication information reaches m, and the subsequently received downlink data packets belonging to the SDF do not add the first indication information, the subsequently received downlink data packets belonging to the SDF are not added with the first indication information. The downlink data packets belonging to the SDF are subject to reflection QoS guarantee.

In some embodiments, the user terminal is configured to, if the downlink data packet belongs to the SDF and the second indication information is added, stop performing QoS guarantee on the downlink data, and stop performing QoS guarantee on the subsequently received data. Downlink data packets belonging to the SDF are subject to reflection QoS guarantee.

In some embodiments, the preset interface is an N4 interface provided between the SMF entity and the UPF entity.

According to a fifth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the method as described in any of the above embodiments is implemented.

According to a sixth aspect of an embodiment of the present disclosure, a computer program product is provided, including computer instructions, wherein when the computer instructions are executed by a processor, the method as described in any of the above embodiments is implemented.

Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

Description of drawings

In order to explain the embodiments of the present disclosure or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic flowchart of a reflective QoS control method according to an embodiment of the present disclosure;

Figure 2 is a schematic diagram of QER information according to an embodiment of the present disclosure;

Figure 3 is a schematic flowchart of a reflective QoS control method according to another embodiment of the present disclosure;

Figure 4 is a schematic diagram of QER information according to another embodiment of the present disclosure;

Figure 5 is a schematic diagram of a UPF entity according to an embodiment of the present disclosure;

Figure 6 is a schematic diagram of a UPF entity according to another embodiment of the present disclosure;

Figure 7 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure;

Figure 8 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

Figure 9 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure.

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses. Based on the embodiments in this disclosure, those of ordinary skill in the art will not make any creative All other embodiments obtained without creative efforts belong to the scope of protection of this disclosure.

The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these examples do not limit the scope of the disclosure unless specifically stated otherwise.

At the same time, it should be understood that, for convenience of description, the dimensions of various parts shown in the drawings are not drawn according to actual proportional relationships.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the authorized specification.

In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters refer to similar items in the following figures, so that once an item is defined in one figure, it does not need further discussion in subsequent figures.

The inventor noticed that in related technologies, in order to enable the RAN and UE to continuously reflect QoS guarantees for downlink data packets belonging to the designated SDF, it is necessary to add RQI information to each downlink data packet belonging to the designated SDF, thus occupying more space. Transport resources.

Accordingly, the present disclosure provides a reflective QoS control scheme that achieves continuous reflective QoS guarantee without adding RQI information to each downlink data packet belonging to a designated SDF, thereby effectively reducing signaling overhead and improving network transmission efficiency. .

Figure 1 is a schematic flowchart of a reflective QoS control method according to an embodiment of the present disclosure. In some embodiments, the following reflective QoS control methods are performed by the UPF entity.

In step 101, the first indication information and the parameter value m of the continuous reflection parameter are extracted from the first QER information associated with the preset SDF sent by the SMF (Session Management Function) entity.

For example, the first QER information is shown in Figure 2.

In some embodiments, after receiving the first QER information sent by the SMF entity through the first signaling through the preset interface, the first indication information and the parameter value m of the continuous reflection parameter are extracted from the first QER information.

For example, the default interface is the N4 interface set between the SMF entity and the UPF entity.

For example, the first signaling includes PFCP (Packet Forwarding Control Protocol) creation signaling or PFCP modification signaling.

In some embodiments, the first indication information is that the value of RQI is 1, that is, RQI=1.

For example, the value of parameter m is 5.

In step 102, among the multiple downlink data packets belonging to the SDF to be sent, add first indication information to each of the first m downlink data packets.

In step 103, m downlink data packets with the first indication information added are sent to the wireless access network device.

In step 104, other downlink data packets except the first m downlink data packets among the plurality of downlink data packets to be sent are directly sent to the wireless access network device.

That is to say, among the multiple downlink data packets belonging to the SDF to be sent, the first indication information is added to each of the first m downlink data packets, and the first indication information is not added to other subsequent downlink data packets. Therefore, after receiving m downlink data packets with the first indication information added, the wireless access network device performs reflective QoS guarantee on the subsequently received downlink data packets belonging to the SDF. This eliminates the need to add RQI information to each downlink data packet belonging to the designated SDF to achieve continuous reflection QoS guarantee, thereby effectively reducing signaling overhead and improving network transmission efficiency.

Figure 3 is a schematic flowchart of a reflective QoS control method according to another embodiment of the present disclosure. In some embodiments, the following reflective QoS control methods are performed by the UPF entity.

In step 301, second indication information is extracted from the second QER information associated with the SDF sent by the SMF entity.

For example, the second QER information is shown in Figure 4.

In some embodiments, after receiving the second QER information sent by the SMF entity through the second signaling through the preset interface, the second indication information is extracted from the second QER information.

For example, the default interface is the N4 interface set between the SMF entity and the UPF entity.

For example, the second signaling includes PFCP modification signaling.

In some embodiments, the second indication information is a reflection QoS indicator RQI with a value of 0, that is, RQI=0.

In step 302, add second indication information to the downlink data packet currently to be sent belonging to the SDF.

In step 303, the downlink data packet with the second indication information added is sent to the wireless access network device, so that the wireless access network device stops performing reflection QoS guarantee on the downlink data packet belonging to the SDF.

Figure 5 is a schematic diagram of a UPF entity according to an embodiment of the present disclosure. As shown in FIG. 5 , the UPF entity includes a first processing module 51 , a second processing module 52 and a third processing module 53 .

The first processing module 51 is configured to extract the first indication information and the parameter value m of the continuous reflection parameter from the first QoS execution rule QER information associated with the preset service data flow SDF sent by the session management function SMF entity.

For example, the first QER information is shown in Figure 2.

In some embodiments, after receiving the first QER information sent by the SMF entity through the first signaling through the preset interface, the first processing module 51 extracts the first indication information and the continuous reflection parameters from the first QER information. parameter value m.

For example, the default interface is the N4 interface set between the SMF entity and the UPF entity.

For example, the first signaling includes PFCP creation signaling or PFCP modification signaling.

In some embodiments, the first indication information is that the value of RQI is 1, that is, RQI=1.

For example, the value of parameter m is 5.

The second processing module 52 is configured to add the first indication information to each of the first m downlink data packets in the plurality of downlink data packets belonging to the SDF to be sent.

The third processing module 53 is configured to send m downlink data packets with the first indication information added to the wireless access network device, and directly send other downlink data packets except the first m downlink data packets among the multiple downlink data packets. Sent to the wireless access network device.

Therefore, after receiving m downlink data packets with the first indication information added, the wireless access network device performs reflective QoS guarantee on the subsequently received downlink data packets belonging to the SDF. This eliminates the need to add RQI information to each downlink data packet belonging to the designated SDF to achieve continuous reflection QoS guarantee, thereby effectively reducing signaling overhead and improving network transmission efficiency.

In some embodiments, the first processing module 51 extracts the second indication information from the second QER information associated with the SDF sent by the SMF entity.

For example, the second QER information is shown in Figure 4.

In some embodiments, after receiving the second QER information sent by the SMF entity through the second signaling through the preset interface, the first processing module 51 extracts the second indication information from the second QER information.

For example, the default interface is the N4 interface set between the SMF entity and the UPF entity.

For example, the second signaling includes PFCP modification signaling.

In some embodiments, the second indication information is a reflection QoS indicator RQI with a value of 0, that is, RQI=0.

The second processing module 52 adds second indication information to the downlink data packet currently to be sent belonging to the SDF.

The third processing module 53 sends the downlink data packet with the second indication information added to the wireless access network device, so that the wireless access network device stops performing reflection QoS guarantee on the downlink data packet belonging to the SDF.

Figure 6 is a schematic diagram of a UPF entity according to another embodiment of the present disclosure. As shown in Figure 6, the UPF entity includes a memory 61 and a processor 62.

Memory 61 is used to store instructions, and processor 62 is coupled to memory 61, and processor 62 is configured to store instructions based on The instructions stored in the memory are executed to implement the method involved in any embodiment in Figure 1 or Figure 3 .

As shown in Figure 6, the UPF entity also includes a communication interface 63 for information exchange with other devices. At the same time, the UPF entity also includes a bus 64, through which the processor 62, the communication interface 63, and the memory 61 complete communication with each other.

The memory 61 may include high-speed RAM memory, or may also include non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 61 may also be a memory array. The memory 61 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.

Additionally, processor 62 may be a central processing unit (CPU), or may be an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present disclosure.

The present disclosure also relates to a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions. When the instructions are executed by a processor, the method involved in any embodiment in Figure 1 or Figure 3 is implemented.

Figure 7 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. As shown in FIG. 7 , the communication system includes an SMF entity 71 , a UPF entity 72 and a RAN device 73 . The UPF entity 72 is the UPF entity related to any embodiment in Figure 5 or Figure 6 .

The SMF entity 71 is configured to configure the parameter value m of the continuous reflection parameter for the SDF when continuous reflection QoS services are required, and send the first QER information associated with the SDF to the UPF entity 72, where the first QER information includes The first indication information and the parameter value m of the continuous reflection parameter.

In some embodiments, the first indication information is a reflection QoS indicator RQI with a value of 1, that is, RQI=1.

In some embodiments, the SMF entity is configured to send the first QER information to the UPF entity through the preset interface using first signaling.

For example, the first signaling includes Packet Forwarding Control Protocol PFCP creation signaling or PFCP modification signaling.

For example, the default interface is the N4 interface set between the SMF entity and the UPF entity.

The RAN device 73 is configured to, after receiving the downlink data packet sent by the UPF entity 72, if the downlink data packet belongs to the SDF and the first indication information is added, perform QoS guarantee on the downlink data. If the downlink data packet belongs to the SDF and the first indication information is added, When the number of downlink data packets reaches m, and the first indication information is not added to the subsequently received downlink data packets belonging to SDF, reflection QoS guarantee is performed on the subsequently received downlink data packets belonging to SDF.

In some embodiments, the SMF entity 71 is configured to send the second QER information associated with the SDF to the UPF entity 72 when the continuous reflective QoS service needs to be terminated, where the second QER information includes the second indication information.

In some embodiments, the second indication information is a reflection QoS indicator RQI with a value of 0, that is, RQI=0.

In some embodiments, the SMF entity 71 is configured to send the second QER information to the UPF entity through the preset interface using second signaling.

For example, the second signaling includes PFCP modification signaling.

For example, the default interface is the N4 interface set between the SMF entity and the UPF entity.

The RAN device 73 is configured to, after receiving the downlink data packet sent by the UPF entity 72, if the downlink data packet belongs to SDF and the second indication information is added, stop performing QoS guarantee on the downlink data, and stop performing QoS guarantee on the subsequently received data belonging to SDF. Reflective QoS guarantee is performed on the downlink data packets.

Figure 8 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure. The difference between Figure 8 and Figure 7 is that in the embodiment shown in Figure 8, the communication system also includes a user terminal 74.

The RAN device 73 is configured to send the received downlink data packet to the corresponding user terminal 74 .

After receiving the downlink data packet sent by the RAN device 73, the user terminal 74 is configured to perform QoS guarantee on the downlink data if the downlink data packet belongs to SDF and the first indication information is added. When the number of downlink data packets reaches m, and the first indication information is not added to the subsequently received downlink data packets belonging to SDF, reflection QoS guarantee is performed on the subsequently received downlink data packets belonging to SDF.

In some embodiments, the user terminal 74 is configured to stop performing QoS guarantees on the downlink data if the downlink data packets belong to SDF and add the second indication information, and stop performing reflective QoS on subsequently received downlink data packets belonging to SDF. Assure.

Figure 9 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure. A specific implementation scenario of the present disclosure is given in Figure 9, where DN is the data network and the AMF entity is the access and mobility management entity.

Example 1

1) When the SMF entity needs to perform continuous reflection QoS services, it configures the parameter value m of the continuous reflection parameter for the predetermined SDF, and sends the first QER information associated with the SDF to the UPF entity. The first QER information includes first indication information and parameter values m of the continuous reflection parameters.

2) The UPF entity extracts the first indication information and the parameter value m of the continuous reflection parameter from the first QER information.

3) The UPF entity adds the first indication information to each of the first m downlink data packets among the multiple downlink data packets to be sent belonging to the SDF, and adds the first indication information to the m downlink data packets. Sent to RAN equipment.

4) The UPF entity directly sends other downlink data packets except the first m downlink data packets among the multiple to-be-sent downlink data packets belonging to the SDF to the RAN device.

5) The RAN device sends the received downlink data packet to the corresponding user terminal.

After receiving the downlink data packet, the RAN equipment and the user terminal perform QoS guarantee on the downlink data if the downlink data packet belongs to SDF and the first indication information is added. When the number of downlink data packets belonging to SDF and adding the first indication information reaches In the case of m, if the first indication information is not added to the subsequently received downlink data packet belonging to SDF, reflection QoS guarantee is performed on the subsequently received downlink data packet belonging to SDF.

Example 2

1) When the SMF entity needs to terminate the continuous reflective QoS service, it sends the second QER information associated with the SDF to the UPF entity. The second QER information includes second indication information.

2) The UPF entity extracts the second indication information from the second QER information.

3) The UPF entity adds second indication information to the downlink data packet currently to be sent belonging to the SDF, and sends the downlink data packet with the second indication information added to the RAN device.

4) The RAN device sends the received downlink data packet to the corresponding user terminal.

After receiving the downlink data packet, the RAN equipment and the user terminal, if the downlink data packet belongs to SDF and the second indication information is added, will stop performing QoS guarantee on the downlink data and stop reflecting the subsequently received downlink data packet belonging to SDF. QoS guarantee.

In some embodiments, the functional units described above can be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (Digital processor) for performing the functions described in this disclosure. Signal Processor (DSP for short), Application Specific Integrated Circuit (ASIC for short), Field-Programmable Gate Array (FPGA for short) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, or any appropriate combination thereof.

Those of ordinary skill in the art can understand that all or part of the steps to implement the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. The above-mentioned The storage media mentioned can be read-only memory, magnetic disks or optical disks, etc.

The description of the present disclosure has been presented for the purposes of illustration and description, and is not intended to be exhaustive or to limit the disclosure to the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure and design various embodiments with various modifications as are suited to the particular use contemplated.

Claims (24)

A reflective QoS control method, executed by the user plane function UPF entity, including: Extract the first indication information and the parameter value m of the continuous reflection parameter from the first QoS execution rule QER information sent by the session management function SMF entity and associated with the preset service data flow SDF; Among the multiple downlink data packets to be sent belonging to the SDF, add the first indication information to each downlink data packet in the first m downlink data packets; Send m downlink data packets with the first indication information added to the wireless access network device; Other downlink data packets except the first m downlink data packets among the plurality of downlink data packets to be sent are directly sent to the wireless access network device. The method of claim 1, wherein, The first indication information is a reflection QoS indicator RQI with a value of 1. The method according to claim 1, wherein extracting the first indication information and the parameter value m of the continuous reflection parameter from the first QER information associated with the preset SDF sent by the SMF entity includes: After receiving the first QER information sent by the SMF entity through the first signaling through the preset interface, extract the first indication information and the continuous reflection parameter from the first QER information. Parameter value m. The method of claim 3, wherein, The first signaling includes Packet Forwarding Control Protocol PFCP creation signaling or PFCP modification signaling. The method of claim 1, further comprising: Extract second indication information from the second QER information associated with the SDF sent by the SMF entity; Add the second indication information to the downlink data packet currently to be sent belonging to the SDF; Send the downlink data packet with the second indication information added to the wireless access network device. The method of claim 5, wherein The second indication information is a reflective QoS indicator RQI with a value of 0. The method of claim 5, wherein extracting the second indication information from the second QER information associated with the SDF sent by the SMF entity includes: After receiving the second QER information sent by the SMF entity through the second signaling through the preset interface, the second indication information is extracted from the second QER information. The method of claim 7, wherein The second signaling includes PFCP modification signaling. The method according to claim 3 or 7, wherein, The preset interface is an N4 interface provided between the SMF entity and the UPF entity. A user plane function UPF entity, including: The first processing module is configured to extract the first indication information and the parameter value m of the continuous reflection parameter from the first QoS execution rule QER information associated with the preset service data flow SDF sent by the session management function SMF entity; The second processing module is configured to add the first indication information to each of the first m downlink data packets among the multiple downlink data packets to be sent belonging to the SDF; The third processing module is configured to send m downlink data packets with the first indication information added to the wireless access network device, and send the multiple downlink data packets except the first m downlink data packets to the wireless access network device. Other downlink data packets are directly sent to the wireless access network device. A user plane function UPF entity, including: memory configured to store instructions; A processor, coupled to the memory, configured to execute the method according to any one of claims 1-9 based on instructions stored in the memory. A communications system including: A UPF entity as claimed in claim 10 or 11; The SMF entity is configured to configure the parameter value m of the continuous reflection parameter for the preset service data flow SDF when continuous reflection QoS services are required, and send the first QER information associated with the SDF to the UPF Entity, wherein the first QER information includes first indication information and the parameter value m of the continuous reflection parameter; The wireless access network device is configured to perform QoS on the downlink data after receiving the downlink data packet sent by the UPF entity, if the downlink data packet belongs to the SDF and the first indication information is added. It is guaranteed that when the number of downlink data packets belonging to the SDF and with the first indication information added reaches m, the subsequently received downlink data packets belonging to the SDF do not have the first indication information added. In this case, reflective QoS guarantee is performed on the subsequently received downlink data packets belonging to the SDF. The system of claim 12, wherein: The first indication information is a reflection QoS indicator RQI with a value of 1. The system of claim 12, wherein: The SMF entity is configured to use first signaling to send the first QER information to the UPF entity through a preset interface. The system of claim 14, wherein: The first signaling includes Packet Forwarding Control Protocol PFCP creation signaling or PFCP modification signaling. The system of claim 12, wherein: The SMF entity is configured to send second QER information associated with the SDF to the UPF entity when the continuous reflection QoS service needs to be terminated, wherein the second QER information includes second indication information; The wireless access network device is configured to, after receiving a downlink data packet sent by the UPF entity, if the downlink data packet belongs to the SDF and the second indication information is added, stop processing the downlink data. Perform QoS guarantee, and stop performing reflective QoS guarantee on subsequently received downlink data packets belonging to the SDF. The system of claim 16, wherein: The second indication information is a reflective QoS indicator RQI with a value of 0. The system of claim 16, wherein: The SMF entity is configured to use second signaling to send the second QER information to the UPF entity through a preset interface. The system of claim 18, wherein: The second signaling includes PFCP modification signaling. The system of claim 12, further comprising a user terminal, wherein, The wireless access network device is configured to send the received downlink data packet to the corresponding user terminal; The user terminal is configured to, after receiving a downlink data packet sent by the wireless access network device, if the downlink data packet belongs to the SDF and the first indication information is added, then To perform QoS guarantee, when the number of downlink data packets belonging to the SDF and with the first indication information added reaches m, the first indication is not added to the subsequently received downlink data packets belonging to the SDF. In the case of information, reflective QoS guarantee is performed on the subsequently received downlink data packets belonging to the SDF. The system of claim 20, wherein: The user terminal is configured to, if the downlink data packet belongs to the SDF and the second indication information is added, stop performing QoS guarantee on the downlink data, and stop performing QoS guarantee on the subsequently received downlink data packet belonging to the SDF. Data packets are reflected QoS guaranteed. A system according to claim 14 or 18, wherein, The preset interface is an N4 interface provided between the SMF entity and the UPF entity. A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the method according to any one of claims 1-9 is implemented. A computer program product comprising computer instructions, wherein when the computer instructions are executed by a processor, the method according to any one of claims 1-9 is implemented.