WO2024032211A1

WO2024032211A1 - Congestion control method and apparatus

Info

Publication number: WO2024032211A1
Application number: PCT/CN2023/103696
Authority: WO
Inventors: 魏鑫鹏; 朱奋勤; 王丹
Original assignee: 华为技术有限公司
Priority date: 2022-08-10
Filing date: 2023-06-29
Publication date: 2024-02-15
Also published as: CN117641441A

Abstract

The present application provides a congestion control method and apparatus, which are used for auditing a transmission rate of a service flow when a base station is congested, and adjusting a transmission mode of the service flow when the speed of the service flow is reduced unusually, thus reducing the degree of congestion of the base station. The method comprises: first, a UPF network element receives congestion information from a base station, wherein the congestion information is used for indicating congestion in a first QoS flow in the base station; and if a transmission rate of a first service flow transmitted in the first QoS flow in the base station does not meet a rate requirement, the UPF network element adjusts a transmission mode of the first service flow so as to reduce the transmission rate of the first service flow in the first QoS flow, thus reducing the degree of congestion of a first base station.

Description

A congestion control method and device

This application claims priority to the Chinese patent application filed with the China Patent Office on August 10, 2022, with application number 202210956565.1 and application title "A congestion control method and device", the entire content of which is incorporated into this application by reference. .

Technical field

The present application relates to the field of communications, and in particular, to a congestion control method and device.

Background technique

When the service packets sent by the application server arrive at the base station, if congestion occurs at the base station, the base station can notify the application server of the congestion information. The application server can obtain the current congestion level of the network based on the received congestion information, and then adopt congestion control to reduce the network congestion. congestion. There are currently many different ways to send network congestion information to application servers. For example, L4S (Low Latency (low latency), Low Loss (low packet loss), Scalable Throughput (scalable throughput)) is a method of The information is provided to the application. Specifically, when the service packet sent by the application server reaches the base station, if the base station is congested, the base station compares the Explicit Congestion Notification (ECN) bit in the IP header of the service packet with the CE (i.e., congestion information), when the user equipment (User Equipment, UE) receives a service message, the UE feeds back the congestion information to the application server; or it can provide the congestion information to the application server through the service-oriented interface provided by the network. However, the problem of network congestion cannot be solved without slowing down the application server.

Contents of the invention

The present application relates to a congestion control method and device, which are used to audit the transmission rate of service flows when congestion occurs in a base station, and adjust the transmission mode of the service flow when the service flow is not slowed down, thereby reducing the congestion level of the base station.

In the first aspect, this application provides a congestion control method, which includes: a user plane function (UPF) network element receives congestion information from a base station, and the congestion information is used to indicate the first quality of service flow (Qos flow) in the base station ) congestion situation; if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement of the first service flow, the UPF network element adjusts the transmission mode of the first service flow.

Therefore, in the implementation of this application, the UPF network element can audit the transmission rate of the service flow. When the transmission rate of the service flow does not meet the rate requirements, the UPF network element can adjust the transmission mode of the service flow, thereby reducing the service flow. The transmission rate of the flow in the first QoS flow reduces the congestion level of the first QoS flow, that is, the congestion level of the base station is reduced.

Optionally, one or more service flows may be transmitted in the first QoS flow. The first service flow mentioned in this application may be any service flow transmitted in the first QoS flow. Moreover, when multiple service flows are transmitted in the first QoS flow, the UPF network element can audit the transmission rate of each service flow. This application takes the audit process of the first service flow as an example to introduce it. .

The first service flow mentioned in this application can also be understood as all service flows transmitted in the first QoS flow, that is, at this time, the first service flow can be used to represent all service flows transmitted in the first QoS flow. In this scenario, the transmission rate of the first service flow transmitted in the first QoS flow mentioned above does not meet the rate requirement of the first service flow, that is, the total transmission rate of all service flows transmitted in the first QoS flow The rate requirement is not met, or it is understood that the rate of the service flow transmitted in the first QoS flow does not meet the rate requirement of the QoS flow, or it is understood that the first QoS flow on the base station is in a congestion state; the aforementioned UPF network element is not responsible for the first service Adjusting the flow transmission mode can be understood as the UPF network element adjusting the transmission mode of the service flow that does not meet the rate requirements in the first QoS flow.

In addition, the first QoS flow can be a QoS flow in which the base station performs ECN marking or congestion notification. Generally, the data transmission efficiency required is relatively high, so congestion control is required to achieve low-latency transmission of data.

Optionally, if the transmission rate of the first service flow meets the rate requirement, that is, the sending end performs a speed reduction process on the first service flow, the UPF network element does not need to adjust the transmission mode of the first service flow, thereby ensuring that the first service flow is A service flow can be transmitted normally in the first QoS flow.

In a possible implementation, the aforementioned UPF network element adjusts the transmission mode of the first service flow, which may include: the UPF network element maps the first service flow to the second Qos flow for transmission. That is, in the implementation of this application, the UPF network element can map the first service flow to the alternative QoS flow for transmission, thereby reducing the amount of data transmitted in the first QoS flow and reducing the congestion level of the first QoS flow.

Specifically, the second Qos flow may be a Qos flow different from the first Qos flow. For example, the first Qos flow may be a Qos flow that carries out ECN marking or congestion notification, and the second Qos flow may not carry out ECN marking or does not carry out congestion notification. Qos flow for congestion notification, or low-priority Qos flow, etc.

In a possible implementation, the above method may also include: the UPF network element sends the second Qos flow information to the session management function (SMF) network element, and the second Qos flow information is used to trigger the second Qos flow. One service flow is mapped to the second Qos flow for transmission.

Therefore, in the embodiment of the present application, the UPF network element can send the information of the selected alternative Qos flow to the SMF network element, thereby notifying the SMF network element that the first service flow has been mapped to the second Qos flow for transmission.

In a possible implementation, the above method may further include: before the UPF network element receives the congestion information from the base station, the UPF network element receives a first configuration message from the SMF network element, and the first configuration message carries the second Qos flow information.

Therefore, in the implementation of this application, before the UPF network element receives the congestion information sent by the base station, the UPF network element can receive the configuration message sent by the SMF, thereby learning the available Qos flow information, so that when congestion occurs, the UPF network element can provide the service flow with Select the Qos flow resource that can be transmitted.

In a possible implementation, the aforementioned UPF network element adjusts the transmission mode of the first service flow, which may include: the UPF network element sends an indication that the rate requirement is not met to the SMF network element. The indication that the rate requirement is not met is It can be used to indicate that the transmission rate of the first service flow does not meet the rate requirement; subsequently, the UPF network element receives the information of the third Qos flow sent from the SMF network element; the UPF network element maps the first service flow to the third Qos flow. transmission.

Therefore, in the implementation of this application, the third QoS flow can also be called the alternative QoS flow. When the UPF network element determines that the rate of the first service flow does not meet the rate requirements, it accepts the information of the alternative QoS flow from the SMF network element. , and maps the first business flow to the alternative QoS flow for transmission, thereby reducing the amount of data transmitted in the first QoS flow and reducing the congestion level of the first QoS flow.

In a possible implementation, the aforementioned UPF network element adjusts the transmission mode of the first service flow, which may include: the UPF network element performs rate limiting processing on the first service flow, so that the transmission rate of the first service flow is Not exceeding the available rate, which can be obtained based on congestion information.

Therefore, in the embodiment of the present application, when the base station is in a congested state, for example, when the sending end does not slow down the first service flow, or the sending end slows down the first service flow less, the UPF network element can perform the slowing down. Fast processing, thereby reducing the transmission rate or bandwidth occupied by the first service flow in the first Qos flow, and reducing the congestion level of the first Qos flow. In this application, when the first service flow refers to all service flows transmitted in the QoS flow, the sending end can refer to one or more sending ends.

In a possible implementation, the aforementioned rate requirement may include: the drop value of the transmission rate within the preset period is greater than the first threshold, or the transmission rate is lower than the second threshold, or the transmission rate is not higher than the available rate. The rate requirement can be obtained based on congestion information. If the congestion information contains a congestion percentage, the value at which the service flow needs to be slowed down can be determined based on the congestion percentage. For example, if the congestion information indicates that the congestion percentage is 10%, the service flow needs to be slowed down. A rate of 10% is considered to meet the rate requirements. In this application, when the first service flow refers to all service flows transmitted in the QoS flow, the transmission rate of the first service flow transmitted in the first QoS flow in the aforementioned base station does not meet the rate requirements of the first service flow. , can also be understood as the first QoS flow in the base station is in a congestion state.

In a possible implementation, before the UPF network element receives the congestion information from the base station, it may also include: the UPF network element receives an audit instruction from the SMF network element, and the audit instruction is used to trigger the UPF network element to determine the first Qos flow Whether the transmission rate of the service flow being transmitted meets the rate requirements.

Therefore, in the embodiment of the present application, the UPF network element can receive the audit instruction from the SMF network element, thereby auditing the transmission rate of the first service flow under the trigger of the audit instruction, so that the transmission rate of the first service flow can be audited. If the rate requirement is not met, the transmission mode of the first service flow is adjusted in time to reduce the congestion level of the first Qos flow.

In a possible implementation, the aforementioned congestion information may include at least one of the following: congestion indication, congestion level, congestion percentage or available bandwidth. The congestion indication is used to indicate that congestion occurs in the first Qos flow. The congestion level may be used to Indicates the corresponding level of congestion generated in the first Qos flow. The congestion percentage indicates the percentage of packets that are congested in the first Qos flow. The available bandwidth is the bandwidth that can be used by the first Qos flow.

In the second aspect, this application provides a congestion control method, including: the SMF network element sends an audit instruction to the UPF network element, and the audit instruction is used to trigger the UPF network element to determine whether the transmission rate of the first service flow transmitted in the first Qos flow is To meet the rate requirements, the congestion information is used to indicate the congestion situation of the first Qos flow in the base station.

Therefore, in the implementation of this application, the SMF network element can send an audit instruction to the UPF network element, thereby triggering the UPF network element to audit the transmission rate of the first service flow in the first QoS flow when the base station is congested. Determine whether the transmission rate of the first service flow is Whether the rate requirement is met, and if the rate requirement is not met, the transmission mode of the first service flow is adjusted, thereby reducing the transmission rate of the first business flow in the first Qos flow and reducing the congestion level of the first Qos flow. .

In a possible implementation, the audit instruction is carried in the first configuration message, and the first configuration message may also carry information about the second Qos flow, so that the UPF network element determines the first Qos flow transmitted in the first Qos flow. When the transmission rate of the service flow does not meet the rate requirement, the first service flow is mapped to the second Qos flow for transmission.

Therefore, in the implementation of this application, before the UPF network element receives the congestion information sent by the base station, the UPF network element can receive the configuration message sent by the SMF, thereby learning the available Qos flow information, so that when congestion occurs, the UPF network element can provide the service flow with Select the Qos flow resource that can be transmitted. The second QoS flow here can also be called the alternative QoS flow for the service flow transmitted in the first QoS flow.

In a possible implementation, the SMF network element also receives information about the second Qos flow from the UPF network element, which is used to trigger mapping of the first service flow to the second Qos flow for transmission.

In the implementation of this application, after the UPF network element maps the first service flow to the second Qos flow for transmission, it can also send the information of the second Qos flow to the SMF network element to notify the SMF network element of the first service flow. It has been mapped to the second Qos flow for transmission.

In a possible implementation, the SMF network element receives an indication from the UPF network element that the rate requirement is not met. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement; and then it is sent to the UPF network The element sends the information of the third Qos flow, which is used by the UPF network element to map the first service flow to the third Qos flow for transmission.

Therefore, in the implementation of this application, the UPF network element may also send the alternative Qos flow information to the UPF network element after sending an indication that the rate requirement is not met to the SMF network element.

In a possible implementation, the aforementioned congestion information may include at least one of the following: congestion indication, congestion level, congestion percentage or available bandwidth. The congestion indication is used to indicate that the first Qos flow generates congestion, and the congestion percentage represents the first Qos flow. The percentage of packets that are congested in the flow. The available bandwidth is the bandwidth that can be used by the first Qos flow. The congestion level is used to identify the degree of congestion. For example, the degree of congestion can be divided into several levels, and each level can be called a congestion level.

In a possible implementation, the aforementioned rate requirement may include: the drop value of the transmission rate within a preset period is greater than the first threshold, or the transmission rate is lower than the second threshold.

In the third aspect, this application provides a congestion control method, including: the UPF network element receives congestion information from the base station, and the congestion information is used to indicate the congestion situation of the first QoS flow in the base station; if the first QoS flow in the base station The transmission rate of the first service flow transmitted in does not meet the rate requirement, then the UPF network element sends an indication that the rate requirement is not met to the session management function SMF network element. The indication that the rate requirement is not met is used to indicate the transmission rate of the first service flow. The rate requirements are not met so that the SMF network element can notify the base station to stop ECN marking or congestion notification for the first Qos flow.

Therefore, in the implementation of this application, when the sending end does not slow down the service flow, the Qos flow for transmitting the service flow does not need to be notified of congestion or ECN marked, and the base station can process the transmitted service flow. Operations such as shaping or packet loss are used to reduce the congestion level of the first Qos flow.

In a possible implementation, before the UPF network element receives the congestion information from the base station, the UPF network element receives an audit instruction from the SMF network element. The audit instruction is used to trigger the UPF network element to determine the services transmitted in the first Qos flow. Whether the transmission rate of the stream meets the rate requirements.

Therefore, in the embodiment of the present application, the UPF network element can receive the audit instruction from the SMF network element, so as to audit the transmission rate of the service flow transmitted in the first QoS flow under the instruction of the audit instruction, so that the first QoS flow can be audited. When the transmission rate of the business flow does not meet the rate requirements, the transmission mode of the first business flow is adjusted in time to reduce the congestion level of the first Qos flow.

In a possible implementation, after the UPF network element sends an indication that the rate requirement is not met to the session management function SMF network element, it receives a stop audit instruction from the SMF network element. The stop audit instruction is used to trigger the UPF network element to stop judging the first Whether the transmission rate of the service flow transmitted in a Qos flow meets the rate requirements.

Therefore, in the embodiment of the present application, after notifying the base station to stop ECN marking or congestion notification, the SMF network element can notify the UPF network element to stop auditing, thereby reducing the workload of the UPF network element.

In the fourth aspect, this application provides a congestion control method, including: the SMF network element receives an indication from the UPF network element that the rate requirement is not met, and the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate. Requirement: The SMF network element sends a notification message to the base station. The notification message is used to notify the base station to stop sending congestion notifications based on the congestion level of the first Qos flow, and/or the notification message is used Instructing the base station to stop performing explicit congestion notification ECN marking on the first service flow.

In a possible implementation, the SMF network element sends an audit instruction to the UPF network element. The audit instruction is used to trigger the UPF network element to determine the third QoS flow transmitted in the first Qos flow when the base station sends congestion information to the UPF network element. Whether the transmission rate of a service flow meets the rate requirements.

Therefore, in the implementation of this application, the SMF network element can send an audit instruction to the UPF network element, thereby triggering the UPF network element to audit the rate of the service flow transmitted in the first Qos flow.

In a possible implementation, the SMF network element also sends a stop audit instruction to the UPF network element. The stop audit instruction is used to trigger the UPF network element to stop judging whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate requirement.

In a possible implementation, after the UPF network element sends an indication that the rate requirement is not met to the session management function SMF network element, the SMF network element also sends a stop audit instruction to the UPF network element. The stop audit instruction is used to trigger the UPF network element. Stop judging whether the transmission rate of the first service flow meets the rate requirement, thereby reducing the workload of the UPF network element.

In a fifth aspect, this application provides a congestion control device, including:

The transceiver module is used to receive congestion information from the base station. The congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

The processing module is used to adjust the transmission mode of the first service flow if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement of the first service flow.

In a possible implementation, the processing module is specifically configured to map the first service flow to the second Qos flow for transmission.

In a possible implementation, the transceiver module is also used to send the information of the second Qos flow to the session management function SMF network element, and the information of the second Qos flow is used to trigger the mapping of the first service flow to the second Qos flow. medium transmission.

In a possible implementation, the transceiver module is also configured to receive the first configuration message from the SMF network element before the UPF network element receives the congestion information from the base station. The first configuration message carries the information of the second Qos flow. , the second QoS flow is the alternative QoS flow for the business flow transmitted in the first QoS flow, that is, when the first QoS flow is congested, the business flow transmitted in the first QoS flow can be mapped to the alternative QoS flow for transmission .

In a possible implementation, the transceiver module is also configured to send an indication that the rate requirement is not met to the session management function SMF network element. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement. ;

The transceiver module is also used to receive the third Qos flow information sent from the SMF network element;

The processing module is specifically used to map the first business flow to the third Qos flow for transmission.

In a possible implementation, the processing module is specifically configured to perform rate limiting processing on the first service flow so that the transmission rate of the first service flow does not exceed an available rate, and the available rate is obtained based on congestion information.

In a possible implementation, the rate requirement includes: the drop value of the transmission rate within the preset period is greater than the first threshold, or the transmission rate is lower than the second threshold, or the transmission rate is not higher than the available rate.

In a possible implementation, the transceiver module is also used to receive an audit instruction from the SMF network element before the UPF network element receives the congestion information from the base station. The audit instruction is used to trigger the UPF network element to determine the first Qos flow. Whether the transmission rate of the transmitted first service stream meets the rate requirement.

In a possible implementation, the congestion information includes at least one of the following:

Congestion indication, congestion level, congestion percentage or available bandwidth. Congestion indication is used to indicate congestion in the first Qos flow. Congestion percentage indicates the percentage of packets that are congested in the first Qos flow. Available bandwidth is the usable bandwidth of the first Qos flow. bandwidth.

In a sixth aspect, this application provides a congestion control device, including:

The transceiver module is used to send audit instructions to the user plane function UPF network element. The audit instructions are used to trigger the UPF network element to determine the status of the first service flow transmitted in the first Qos flow when the base station sends congestion information to the UPF network element. Whether the transmission rate meets the rate requirements, the congestion information is used to indicate the congestion situation of the first Qos flow in the base station.

In a possible implementation, the audit instruction is carried in the first configuration message, and the first configuration message also carries the second Qos flow information, so that when the UPF network element determines that the transmission rate of the first service flow transmitted in the first Qos flow does not meet the rate requirement, it can map the first service flow to the second Qos flow for transmission.

In a possible implementation, the transceiver module is also configured to receive information about the second Qos flow from the UPF network element, and to instruct the UPF network element to map the first service flow to the second Qos flow for transmission.

In a possible implementation, the transceiver module is also configured to receive an indication from the UPF network element that the rate requirement is not met, and the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The transceiver module is also used to send the third Qos flow information to the UPF network element, and is used by the UPF network element to map the first service flow to the third Qos flow for transmission.

In a seventh aspect, this application provides a congestion control device, including: a transceiver module for receiving congestion information from a base station, where the congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

The transceiver module is also used to send an indication that the rate requirement is not met to the session management function SMF network element if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement. Used to indicate that the transmission rate of the first service flow does not meet the rate requirement.

In a possible implementation, the transceiver module is also configured to receive an audit instruction from the SMF network element before receiving the congestion information from the base station. The audit instruction is used to trigger the UPF network element to determine the first Qos flow transmitted in the first Qos flow. Whether the transmission rate of a service flow meets the rate requirements.

In a possible implementation, the transceiver module is also configured to receive an audit stop instruction from the SMF network element after sending an indication that the rate requirement is not met to the session management function SMF network element. The stop audit instruction is used to trigger the UPF network. The element stops to determine whether the transmission rate of the first service flow transmitted in the first Qos flow meets the rate requirement.

In an eighth aspect, this application provides a congestion control device, including:

The transceiver module is used to receive an indication from the UPF network element that the rate requirement is not met. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The transceiver module is also used to send a notification message to the base station. The notification message is used to notify the base station to stop sending congestion notifications for the congestion level of the first Qos flow, and/or the notification message is used to instruct the base station to stop explicit processing of the first service flow. Congestion notification ECN flag.

In a possible implementation, the transceiver module is also used to send an audit instruction to the UPF network element. The audit instruction is used to instruct the UPF network element to determine the first Qos flow when the base station sends congestion information to the UPF network element. Whether the transmission rate of the transmitted first service stream meets the rate requirement.

In a possible implementation, the transceiver module is also used to send a stop audit instruction to the UPF network element. The stop audit instruction is used to trigger the UPF network element to stop judging whether the transmission rate of the first service flow transmitted in the first Qos flow is Meet rate requirements.

In a ninth aspect, the present application provides a congestion control device. The congestion control device includes: a processor, a memory, an input and output device, and a bus; computer instructions are stored in the memory; when the processor executes the computer instructions in the memory, , the memory stores computer instructions; when the processor executes the computer instructions in the memory, it is used to implement any implementation manner as in the first aspect.

In a possible implementation, the processor, memory, and input and output devices are respectively connected to the bus.

In a tenth aspect, the present application provides a congestion control device. The congestion control device includes: a processor, a memory, an input and output device, and a bus; computer instructions are stored in the memory; when the processor executes the computer instructions in the memory, , the memory stores computer instructions; when the processor executes the computer instructions in the memory, it is used to implement any implementation manner as in the second aspect.

In an eleventh aspect, the present application provides a congestion control device. The congestion control device includes: a processor, a memory, an input and output device, and a bus; computer instructions are stored in the memory; and the processor executes the computer instructions in the memory. when the computer instructions are stored in the memory; when the processor executes the computer instructions in the memory, it is used to implement any implementation manner as in the third aspect.

In a twelfth aspect, the present application provides a congestion control device. The congestion control device includes: a processor, a memory, an input and output device, and a bus; computer instructions are stored in the memory; and the processor executes the computer instructions in the memory. when the computer instructions are stored in the memory; when the processor executes the computer instructions in the memory, it is used to implement any implementation method as in the fourth aspect Mode.

A thirteenth aspect of the embodiment of the present application provides a communication system, which includes the congestion control device of the sixth aspect and the congestion control device of the seventh aspect.

A fourteenth aspect of the embodiments of the present application provides a communication system, which includes the congestion control device of the eighth aspect and the congestion control device of the tenth aspect.

The fifteenth aspect of the embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port. The processor is used to implement the processing functions involved in the congestion control method described in the first aspect. The input/output port is used to implement the transceiver function involved in the congestion control method described in the first aspect.

In a possible design, the chip system further includes a memory, which is used to store program instructions and data for implementing functions involved in the congestion control method described in the first aspect.

The chip system may be composed of chips, or may include chips and other discrete devices.

The sixteenth aspect of the embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port. The processor is used to implement the processing functions involved in the congestion control method described in the second aspect. The input/output port is used to implement the transceiver function involved in the congestion control method described in the second aspect.

In a possible design, the chip system further includes a memory, which is used to store program instructions and data for implementing the functions involved in the congestion control method described in the second aspect.

The seventeenth aspect of the embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port. The processor is used to implement the processing functions involved in the congestion control method described in the third aspect. The input/output port is used to implement the transceiver function involved in the congestion control method described in the third aspect.

In a possible design, the chip system further includes a memory, which is used to store program instructions and data for implementing the functions involved in the congestion control method described in the third aspect.

The eighteenth aspect of the embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port. The processor is used to implement the congestion control method described in the fourth or fifth aspect. Processing function, the input/output port is used to implement the transceiver function involved in the congestion control method described in the fourth aspect.

In a possible design, the chip system further includes a memory, which is used to store program instructions and data for implementing the functions involved in the congestion control method described in the fourth aspect.

A nineteenth aspect of the embodiment of the present application provides a computer-readable storage medium. Computer instructions are stored in the computer-readable storage medium; when the computer instructions are run on the computer, the computer is caused to execute any one of the possible implementation methods of the first aspect, the second aspect, the third aspect or the fourth aspect. The communication processing method described.

A twentieth aspect of the embodiment of the present application provides a computer program product. The computer program product includes a computer program or instructions. When the computer program or instructions are run on a computer, the computer executes any possible implementation manner of the first aspect, the second aspect, the third aspect or the fourth aspect. The communication processing method described.

Description of drawings

Figure 1 is an architectural schematic diagram of a communication system provided by an embodiment of the present application;

Figure 2 is a schematic diagram of an application scenario according to the embodiment of the present application;

Figure 3 is a schematic flow chart of a congestion control method provided by this application;

Figure 4 is a schematic flow chart of another congestion control method provided by this application;

Figure 5 is a schematic flow chart of another congestion control method provided by this application;

Figure 6 is a schematic flow chart of another congestion control method provided by this application;

Figure 7 is a schematic flow chart of another congestion control method provided by this application;

Figure 8 is a schematic flow chart of another congestion control method provided by this application;

Figure 9 is a schematic flow chart of another congestion control method provided by this application;

Figure 10 is a schematic flow chart of another congestion control method provided by this application;

Figure 11 is a schematic flow chart of another congestion control method provided by this application;

Figure 12 is a schematic structural diagram of a congestion control device provided by this application;

Figure 13 is a schematic structural diagram of another congestion control device provided by this application;

Figure 14 is a schematic structural diagram of another congestion control device provided by this application;

Figure 15 is a schematic structural diagram of another congestion control device provided by this application;

Figure 16 is a schematic structural diagram of another congestion control device provided by this application;

Figure 17 is a schematic structural diagram of another congestion control device provided by this application;

Figure 18 is a schematic structural diagram of another congestion control device provided by this application;

Figure 19 is a schematic structural diagram of another congestion control device provided by this application;

Figure 20 is another architectural schematic diagram of a communication system provided by an embodiment of the present application;

Figure 21 is another architectural schematic diagram of a communication system provided by an embodiment of the present application.

Detailed ways

Embodiments of the present application provide a congestion control method and device for reducing the congestion level of a base station and improving data transmission efficiency and reliability.

First of all, the congestion control method provided by this application can be applied to a variety of communication networks, such as fifth generation (5th generation, 5G) communication systems, new radio (NR), and long term evolution (LTE) systems. , LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), global interoperability for microwave access access, WiMAX) communication system or other future communication systems such as 6G, etc. This application takes the 5G communication system as an example for introduction.

Please refer to Figure 1, which is a schematic structural diagram of the 3rd generation partnership project (3GPP) network based on 5G communication technology. The network shown in Figure 1 mainly includes: radio access network (RAN) equipment, AMF network elements, user plane function (UPF) network elements, PCF network elements, terminal equipment, etc.

In the communication system, the part operated by the operator can be called PLMN (it can also be called the operator network, etc.).

The network architecture can include three parts, namely the terminal equipment part, PLMN and data network (DN). PLMN is mainly a public network used by mobile network operators (MNOs) to provide mobile broadband access services to users. The PLMN described in this application may specifically be a network that meets the standard requirements of the 3rd generation partnership project (3GPP), referred to as a 3GPP network. 3GPP networks generally include, but are not limited to, fifth-generation mobile communications (5th-generation, 5G) networks (referred to as 5G networks), fourth-generation mobile communications (4th-generation, 4G) networks (referred to as 4G networks), etc.

The terminal device part may include a terminal device 110, which may also be called user equipment (UE). The terminal device 110 in this application is a device with a wireless transceiver function, which can communicate with an or Multiple core network (core network, CN) devices (or can also be called core devices) communicate. Terminal equipment 110 may also be referred to as an access terminal, terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent or user device, etc. The terminal device 110 can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons, satellites, etc.). The terminal device 110 may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a smart phone, a mobile phone, a wireless local loop (WLL) ) website, personal digital assistant (PDA), etc. Alternatively, the terminal device 110 may also be a handheld device with wireless communication function, a computing device or other device connected to a wireless modem, a vehicle-mounted device, a wearable device, a drone device or a terminal in the Internet of Things, the Internet of Vehicles, or a 5G network As well as any form of terminals in future networks, relay user equipment or terminals in future evolved PLMNs, etc. The relay user equipment may be, for example, a 5G residential gateway (RG). For example, the terminal device 110 may be a virtual reality (VR) Terminals, augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, smart grids Wireless terminals in grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc. The embodiments of the present application do not limit the type or type of terminal equipment.

PLMN can include: network exposure function (NEF)131, network function repository function (NRF)132, policy control function (PCF)133, unified data management (UDM) ) 134, application function (AF) 135, AUSF 136, AMF 137, session management function (SMF) 138, user plane function (UPF) 139 and (wireless) access network ((radio) )access network, (R)AN)140, NSSAAF141, etc. In the above-mentioned PLMN, the part other than the (wireless) access network 140 part may be called a core network (core network, CN) part or a core network part.

Data network (DN) 120, which may also be called packet data network (PDN), is usually a network located outside the PLMN, such as a third-party network. For example, the PLMN can access multiple data network DNs 120, and multiple services can be deployed on the data network DNs 120 to provide data and/or voice services for the terminal device 110. For example, the data network DN 120 can be a private network of a smart factory. The sensors installed in the workshop of the smart factory can be terminal devices 110. The data network DN 120 has a control server for the sensor deployed, and the control server can provide services for the sensors. The sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions. For another example, the data network DN 120 can be a company's internal office network, and the company's employees' mobile phones or computers can be the terminal devices 110. The employees' mobile phones or computers can access information, data resources, etc. on the company's internal office network. The terminal device 110 can establish a connection with the PLMN through an interface provided by the PLMN (such as the N1 interface in Figure 1, etc.) and use data and/or voice services provided by the PLMN. The terminal device 110 can also access the data network DN 120 through the PLMN, and use operator services deployed on the data network DN 120, and/or services provided by third parties. The above-mentioned third party may be a service provider other than the PLMN and the terminal device 110, and may provide other data and/or voice services for the terminal device 110. Among them, the specific manifestations of the above-mentioned third parties can be determined according to the actual application scenarios and are not limited here.

As an example, the network functions in PLMN are briefly introduced below.

(R)AN 140 is a subnetwork of PLMN and an implementation system between service nodes (or network functions) and terminal equipment 110 in PLMN. To access the PLMN, the terminal equipment 110 first passes through the (R)AN 140, and then connects to the service node in the PLMN through the (R)AN 140. The access network device in the embodiment of the present application is a device that provides wireless communication functions for the terminal device 110, and may also be called an access device, a (R)AN device, a network device, etc. For example, the access equipment includes but is not limited to: next generation node basestation (gNB) in the 5G system, evolved node B (eNB) in the LTE system, radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (home evolved nodeB, or home node B, HNB), baseband Unit (base band unit, BBU), transmitting and receiving point (TRP), transmitting point (TP), small base station equipment (pico), mobile switching center, or network equipment in future networks, etc. It can be understood that this application does not limit the specific type of access network equipment. In systems using different wireless access technologies, the names of devices with access network device functions may be different.

Optionally, in some deployments of access equipment, the access equipment may include a centralized unit (centralized unit, CU), a distributed unit (distributed unit, DU), etc. In other deployments of access equipment, CU can also be divided into CU-control plane (CP) and CU-user plane (user plan, UP). In some deployments of access equipment, the access equipment may also be an open radio access network (ORAN) architecture, etc. This application does not limit the specific deployment method of the access equipment.

The network opening function NEF (may also be called NEF network function or NEF network function entity) 131 is a control plane function provided by the operator. NEF network function 131 opens the PLMN's external interface to third parties in a secure manner. When the SMF network function 138 needs to communicate with a third-party network function, the NEF network function 131 can serve as a relay for the communication between the SMF network function 138 and the third-party network entity. When the NEF network function 131 serves as a relay, it can be used as a translator for the identification information of the subscriber and the identification information of the third-party network function. Translated. For example, when the NEF network function 131 sends the subscriber permanent identifier (SUPI) of the subscriber from the PLMN to a third party, it can translate the SUPI into its corresponding external identity (ID). On the contrary, when the NEF network function 131 sends the external ID (the third party's network entity ID) to the PLMN, it can be translated into SUPI.

The network storage function NRF 132 can be used to maintain real-time information of all network function services in the network.

The policy control function PCF 133 is a control plane function provided by the operator and is used to provide the session management function SMF 138 with the policy of a protocol data unit (PDU) session. Policies may include accounting-related policies, QoS-related policies, authorization-related policies, etc.

Unified data management UDM 134 is a control plane function provided by operators and is responsible for storing information such as subscriber permanent identifier (SUPI), security context, and subscription data of subscribed users in PLMN. The above-mentioned PLMN contract users may specifically be users who use the services provided by the PLMN, such as users who use China Telecom's terminal equipment chip cards, or users who use China Mobile's terminal equipment chip cards, etc. For example, the SUPI of the subscriber may be the number of the terminal device's chip card, etc. The above security context may be data (cookie) or token stored on the local terminal device (such as a mobile phone). The contract data of the above-mentioned contract users can be the supporting services of the terminal equipment chip card, such as the traffic package of the mobile phone chip card, etc.

Application function AF 135 is used for application-influenced data routing, access to network opening functions, and interaction with the policy framework for policy control, etc.

The authentication server function AUSF 136 is a control plane function provided by the operator and is usually used for first-level authentication, that is, the authentication between the terminal device 110 (subscriber) and the PLMN.

The network slicing authentication and authorization function NSSAAF141 is a control plane function provided by the operator and is usually used for slice authentication of network slicing. That is, slice authentication is performed between the terminal device 110 and an authentication server (such as an authentication server of an operator network or an authentication server of a third-party DN).

The access and mobility management function AMF 137 is a control plane network function provided by the PLMN. It is responsible for the access control and mobility management of the terminal device 110 accessing the PLMN, such as mobility status management, allocation of user temporary identity, authentication and authorization. User functions.

The session management function SMF 138 is a control plane network function provided by the PLMN and is responsible for managing protocol data unit (PDU) sessions of the terminal device 110. A PDU session is a channel used to transmit PDUs. Terminal devices need to transmit PDUs to each other through the PDU session and DN 120. PDU sessions can be established, maintained and deleted by SMF 138. SMF 138 includes session management (such as session establishment, modification and release, including tunnel maintenance between UPF 139 and (R)AN 140, etc.), selection and control of UPF 139, service and session continuity (service and session continuity, SSC) ) Mode selection, roaming and other session-related functions.

User plane function UPF 139 is a gateway provided by the operator and is the gateway for communication between PLMN and DN 120. UPF 139 includes user plane related functions such as data packet routing and transmission, packet detection, business usage reporting, quality of service (QoS) processing, legal interception, uplink packet detection, downlink data packet storage, etc.

The network functions in the PLMN shown in Figure 1 may also include a network slice selection function (NSSF) (not shown in Figure 1), which is responsible for determining network slice instances, selecting AMF network functions 137, etc. The network functions in the PLMN shown in Figure 1 may also include unified data repository (UDR), etc. The embodiments of this application do not limit other network functions included in the PLMN.

In Figure 1, Nnef, Nausf, Nnssaaf, Nnrf, Npcf, Nudm, Naf, Namf, Nsmf, N1, N2, N3, N4, and N6 are interface serial numbers. For example, the meaning of the above interface serial number may refer to the meaning defined in the 3GPP standard protocol. This application does not limit the meaning of the above interface serial number. It should be noted that in Figure 1, only the terminal device 110 is used as an example for the UE, and the interface names between various network functions in Figure 1 are just an example. In specific implementation, the interface names of the system architecture There may also be other names, which are not limited in this application.

Generally, a variety of data can be transmitted in a communication network, such as communication data between users, or media data generated by services used by users. For example, the development of communications has further improved the experience of the new media industry, video services have become mainstream media forms, and emerging multimedia such as virtual reality (VR, Virtual Reality), augmented reality (AR, Augment Reality) and other extended reality (eXtended Reality, XR) have emerged. business. The following describes the VR business as an example.

VR is a revolutionary technology that completely subverts content consumption and communication consumption. VR technology blocks the user's line of sight and brings their senses into an independent and new virtual space, providing users with an immersive and more immersive experience.

The typical business process of Cloud VR business is shown in Figure 2. The user's VR device (such as a wearable VR headset) captures the user's action information, such as head movements, hand movements, squatting/standing up, etc. And sent to the cloud server through the communication network (for example: 5G network). The cloud server renders and generates images based on the user's action information, and sends them to the user's device for viewing through the communication network.

Cloud VR business is cyclical: VR equipment periodically sends uplink control packets containing interactive device signals such as head rotation/handle, with a general cycle of about 2.5ms-5ms); the cloud server generates video frames according to the frame rate and passes them through the downlink Sent to the terminal (for example, if the frame rate is 60fps, one frame is generated every 16.67ms).

Usually, when the amount of data transmitted in the network is greater than the forwarding capability of the network device, the network device will be congested. In order to reduce the congestion of the network device, the sending end of the business flow (such as the application server) needs to take congestion control measures, such as reducing the business flow. .

L4S (Low Latency, Low Loss, Scalable Throughput) is a solution that provides network congestion information to applications. Specifically, when the service packet sent by the application server reaches the base station, if congestion occurs at the base station, the base station compares the Explicit Congestion Notification (ECN) bit in the IP header of the service packet with CE (congestion information). When the UE receives the service packet, the UE feeds back the congestion information to the application server. The application server calculates the current congestion level of the network based on the received congestion information, and then adopts congestion control to reduce network congestion.

The 5G network can also provide congestion information to the application server by defining a service-oriented interface that opens network capabilities. The application server takes congestion control based on the received congestion information to reduce network congestion.

In this solution, the application sender will perform appropriate congestion control based on the received congestion information to reduce the congestion state. However, in actual scenarios, it may not be possible to ensure that the application sender can adopt appropriate congestion control measures. If the application sender does not slow down, the congestion in the RAN will not be resolved. If some applications adopt appropriate congestion control algorithms, the RAN will continue to notify congestion, and other applications that follow congestion control will slow down, eventually resulting in applications that do not slow down. Seize bandwidth for slowed down applications.

Therefore, this application provides a congestion control method. After the base station sends the congestion information to the application sending end, UPF audits whether the application has taken correct speed reduction measures. If UPF detects that the application has not taken appropriate speed reduction actions, then Adjust the transmission mode of the service flow to reduce base station congestion.

First of all, the congestion control method provided by this application includes multiple control methods. In one scenario, the UPF network element receives congestion information from the base station. The congestion information is used to indicate the congestion of the first quality of service flow (Qos flow) in the base station. Situation; if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement, the UPF network element adjusts the transmission mode of the first service flow.

In another scenario, the UPF network element receives congestion information from the base station. The congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station; if the first service flow transmitted in the first QoS flow in the base station If the transmission rate does not meet the rate requirement, the UPF network element sends an indication that the rate requirement is not met to the SMF network element. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement.

The congestion control method provided by this application will be introduced in detail below with reference to the accompanying drawings.

The congestion control method provided by this application can be controlled in a variety of ways during congestion control. In one scenario, if the service flow is not slowed down, the UPF network element can adjust the transmission mode of the service flow, such as changing the service flow to The flow is mapped to other QoS flows for transmission or the speed of the service flow is limited. In another scenario, if the service flow is not slowed down, the UPF network element can report it to the SMF network element, and the SMF network element notifies the base station to target the service. The flow stops ECN marking or stops congestion notification for the QoS flow. Different scenarios are introduced below.

First, for the scheme of adjusting the transmission mode of the service flow by the UPF network element, refer to Figure 3, which is a schematic flow chart of a congestion control method provided by this application, as follows.

301. The SMF network element sends a configuration message to the UPF network element.

The configuration message (which may also be called the first configuration message for ease of distinction) may be sent by the SMF network element to the UPF network element through the N4 interface (or N4 rule).

The configuration message may carry the first service flow identification information used to identify the service flow. Optionally, it may also carry an audit instruction. The audit instruction is used to trigger the UPF network element to perform an inspection on the rate of the service flow transmitted in the first Qos flow. audit. That is, the audit instruction triggers the UPF network element to audit the rate of the first service flow transmitted in the first QoS flow.

Generally, there may be multiple service flows for transmission in the communication network. The first service flow may be any service flow transmitted within the communication network. The service flow may be transmitted via application servers, UPF network elements, base stations, UEs, etc. .

Specifically, the SMF network element and the UPF network element can be referred to the relevant introduction in Figure 1, and will not be described again here. The configuration message can be sent by the SMF network element and the UPF network element when the PDU session is established, or it can be sent at any time before transmitting the first service flow. The details can be adjusted according to the actual application scenario, and this application does not limit this. .

In a possible implementation, the first configuration message carries information about the second Qos flow. Therefore, in the implementation of this application, before the UPF network element receives the congestion information sent by the base station, the UPF network element receives the configuration message sent by the SMF, thereby learning the available Qos flow information, so that when congestion occurs at the base station, the service flow can be mapped Transmitted to the alternative Qos flow.

302. The base station sends congestion information to the UPF network element.

The first service flow can be transmitted in the first QoS flow, and the first QoS flow can transmit the service flows corresponding to one or more services. This application takes the first service flow as an example for illustrative explanation. A service flow can be any service flow transmitted in the first QoS flow.

During the process of transmitting the first service flow, the base station can monitor the congestion situation of the first QoS flow, and when congestion is detected, if the queue of the base station exceeds the threshold, congestion information is sent to the UPF network element, thereby indicating that the first QoS flow is blocked. A QoS flow generates congestion.

Optionally, the congestion information may include congestion indication, congestion level, congestion percentage, congestion level, available bandwidth or other information indicating congestion conditions. The congestion indication is used to indicate that congestion occurs in the first QoS flow, which can be represented by one of the bits in the congestion information; the congestion percentage is the percentage of data packets that cause congestion, and the congestion level represents the level of congestion, for example The congestion situation is divided into several levels, and the congestion level carried in the congestion information can indicate the current congestion level of the base station, and the available bandwidth is the bandwidth that can be used in the first QoS flow.

303. The UPF network element determines whether the transmission rate of the first service flow meets the rate requirement. If not, step 304 is executed. If yes, subsequent steps are not executed.

Among them, the UPF network element can audit the transmission rate of the first service flow to determine whether the first service flow meets the rate requirement corresponding to the first service flow. If not, that is, the sending end does not perform speed reduction processing according to the congestion situation. Step 304 can be executed. If satisfied, it means that the sending end has decelerated the first service flow according to the congestion situation, and the UPF network element does not need to perform processing, which is not shown in Figure 3 here.

Specifically, the UPF network element can obtain the first service flow information transmitted in the first QoS flow based on the maintained correspondence between the service flow and the QoS flow. It can be understood that the mapping relationship between the service flow and the QoS flow can be maintained in the UPF network element, so that when the congestion information of the first QoS flow is received, the traffic transmitted in the first QoS flow can be learned from the mapping relationship. Business flow information. The fact that the transmission rate of the first service flow does not meet the rate requirement may mean that the first service flow is not decelerated, or it may further be understood that the sending end does not decelerate according to network congestion when sending the first service flow.

Optionally, the rate requirement may include whether the transmission rate drops to greater than the first threshold within a preset period, or the transmission rate is lower than the second threshold, or the transmission rate is not higher than the available rate, or whether the transmission rate drops, etc. The rate requirement may be determined based on congestion information. For example, the available rate may be the available rate or available bandwidth carried in the congestion information. For example, if the congestion information carries the congestion percentage, it can be determined that the transmission rate has dropped to greater than the first threshold within the preset period. If the congestion information carries the available bandwidth, it can be determined that the transmission rate is lower than the second threshold. Specifically, The matching judgment criteria can be selected according to actual application scenarios, and this application does not limit this.

It can be understood that the UPF network element can determine whether the first service flow is slowed down after congestion occurs in the first QoS flow. If it is not slowed down, further processing can be performed. If it is slowed down, it means that the application server has responded to the congestion situation. After processing, the subsequent congestion level of the first QoS flow will be alleviated, so the UPF network element does not need to be processed.

Optionally, if the configuration message in step 301 carries an audit instruction, the UPF network element can audit the transmission rate of the service flow transmitted in the first QoS flow under the trigger of the audit instruction, that is, determine the first QoS flow. Whether the transmission rate of the service flow transmitted in the flow meets the corresponding rate requirements.

304. The UPF network element adjusts the transmission mode of the first service flow.

After the UPF network element determines that the transmission rate of the first service flow does not meet the rate requirements, it can adjust the transmission mode of the first service flow, thereby reducing the congestion level of the first QoS flow.

Optionally, the QoS flow that transmits the first service flow may be changed, or the transmission rate of the first service flow may be limited, thereby reducing the congestion level of the first QoS flow.

In a possible implementation, the aforementioned UPF network element adjusts the transmission mode of the first service flow, which may include: the UPF network element maps the first service flow to the second Qos flow for transmission. That is, in the implementation of this application, the UPF network element can map the first service flow to the alternative QoS flow for transmission, thereby reducing the amount of data transmitted in the first QoS flow and reducing the congestion level of the first QoS flow. The UPF network element maps the first service flow to the second QoS flow for transmission, which can also be understood as the UPF network element transmits the first service flow through the second QoS flow.

In a possible implementation manner, the aforementioned UPF network element adjusts the transmission mode of the first service flow, which may include: the UPF network element sends an indication that the rate requirement is not met to the SMF network element, and the indication that the rate requirement is not met is In order to indicate that the transmission rate of the first service flow does not meet the rate requirement, in this application, the indication that the rate requirement is not met can also be called a request QoS flow indication, which is used to instruct the SMF to map the first service flow to other QoS flows, or also It may be called a service flow not normally decelerated indication, which is used to indicate that the first service flow is not properly decelerated, or it may also be called a service flow not decelerated indication, which is used to indicate that the first service flow is not decelerated properly. The UPF network element receives the information of the third Qos flow sent from the SMF network element. The third Qos flow can be understood as the alternative Qos flow allocated by the SMF network element for the first service flow, or as the QoS corresponding to the first service flow. flow, that is, the SMF network element maps the first service flow to the third QoS flow; the UPF network element maps the first service flow to the third QoS flow for transmission. Therefore, in the implementation of this application, when the UPF network element determines that the rate of the first service flow does not meet the rate requirements, it receives the information of the alternative Qos flow from the SMF network element, and maps the first service flow to the alternative Qos flow. transmission, thereby reducing the amount of data transmitted in the first QoS flow and reducing the congestion level of the first QoS flow.

It should be understood that the aforementioned second Qos flow and third Qos flow can be understood as alternative Qos flows allocated by the SMF network element for the service flow transmitted in the first Qos flow, and can be referred to as alternatives in the following implementation modes of this application. Qos flow will not be described in detail below. In this application, alternative QoS flow can be understood as that a certain service flow can be remapped from its mapped QoS flow to an alternative QoS flow under certain circumstances.

Moreover, usually the first Qos flow can include Qos flows for which the base station needs to carry out ECN marking or congestion notification, while the alternative Qos flows can include Qos flows that do not need to carry out ECN marking or congestion notification, or can also include non-guaranteed bit rates. (non-Guaranteed Bit Rate, non-GBR) QoS flow, or low-priority QoS flow, can be adjusted according to the actual application scenario, and this application does not limit this.

In a possible implementation, the UPF network element can perform rate limiting processing on the first service flow, such as shaping or packet loss, so that the transmission rate of the first service flow does not exceed the available rate. The available rate can be Obtained based on congestion information. Thereby reducing the transmission rate of the first service flow in the first QoS flow, reducing the congestion level of the first QoS flow, and thereby reducing the congestion level of the base station.

Therefore, in the implementation of this application, the UPF network element can audit the transmission rate of the service flow transmitted in the QoS flow. When the QoS flow is congested, if the application server does not slow down the service flow, or the application server slows down the service flow, If the rate drops too little after speed reduction, the UPF network element can adjust the transmission rate of the service flow, thereby reducing the congestion level of QoS flow and improving data transmission efficiency.

In a possible implementation, if the UPF maps the first service flow to the second Qos flow for transmission, the UPF network element can send the information of the second Qos flow to the session management function (session management function, SMF) network element. , the information of the second Qos flow is used to indicate that the first service flow is mapped to the second Qos flow for transmission. Therefore, in the embodiment of the present application, the UPF network element can send the information of the selected alternative Qos flow to the SMF network element, thereby notifying the SMF network element that the first service flow has been mapped to the second Qos flow for transmission.

For ease of understanding, the following describes the different processes for UPF network elements to adjust the transmission mode of service flows.

Referring to Figure 4, a schematic flow chart of another congestion control method provided by this application is as follows.

401. The SMF network element sends a configuration message to the UPF network element. The configuration message carries audit instructions and second QoS flow information.

The configuration message may be a message sent by the SMF network element to the UPF network element through the N4 interface. The configuration message may carry the first service flow identification information used to identify the service flow, and may also carry an audit instruction. The audit instruction is Triggering the UPF network element to audit the rate of the first service flow transmitted in the first Qos flow.

The configuration message may also carry information about one or more second QoS flows, such as the identifier of the second QoS flow or other QoS flow feature description information. It can be understood that the second QoS flow is an alternative QoS flow, used to map the data transmitted in the first QoS flow to the second QoS flow when congestion occurs in the first QoS flow, thereby reducing the first QoS flow. degree of congestion.

402. The base station sends congestion information to the UPF network element.

403. The UPF network element determines whether the transmission rate of the first service flow meets the rate requirement. If not, step 404 is executed. If yes, subsequent steps are not executed.

It should be noted that for step 402 and step 403 in this application, reference can be made to the introduction in the foregoing step 302 and step 303, which will not be described again here.

404. The UPF network element maps the first service flow to the second QoS flow for transmission.

Among them, when the UPF network element determines that the first service flow is not slowed down, it can map the first service flow transmitted in the first QoS flow to the second QoS flow, that is, transmit the first service in the second QoS flow. flow, thereby reducing the congestion level of the first QoS flow.

405. The UPF network element sends the second QoS flow information to the SMF network element.

After the UPF network element maps the first service flow to the second QoS flow for transmission, it can send a reporting message to the SMF network element, and carry the information of the second QoS flow in the reporting message, such as the identifier of the second QoS flow or Name and other information, thereby notifying SMF that the first service flow has been mapped to the second QoS flow for transmission.

Therefore, in the implementation of this application, the SMF network element can send the information of the alternative QoS flow to the UPF network element through the configuration message before congestion occurs. When congestion occurs and the service flow is not slowed down, the UPF network element can The service flow is mapped to the alternative QoS flow for transmission, thereby reducing the congestion level of the first QoS flow.

Referring to Figure 5, a schematic flow chart of another congestion control method provided by this application is as follows.

It should be noted that steps similar to those in Figure 3 and Figure 4 will not be described again here. Only some steps with differences will be introduced.

501. The SMF network element sends a configuration message to the UPF network element, and the configuration message carries audit instructions.

502. The base station sends congestion information to the UPF network element.

503. The UPF network element determines whether the transmission rate of the first service flow meets the rate requirement. If not, step 504 is executed. If yes, subsequent steps are not executed.

504. The UPF network element sends a reporting message to the SMF network element.

The reporting message may carry an indication that the rate requirement is not met, which is used to indicate that the transmission rate of the first service flow does not meet the rate requirement, so as to notify the SMF network element to allocate the optional QoS flow to the first service flow. This embodiment The alternative QoS flow in can also be called a new QoS flow, that is, the SMF network element allocates a new QoS flow to the first service flow. The allocation here can also be called mapping. The SMF network element allocates the optional QoS flow to the first service flow. It can also be called the SMF network element mapping the first service flow to the alternative QoS flow, that is, through the alternative QoS flow. Transmit the first service flow.

505. The SMF network element sends a configuration message to the UPF network element, carrying the information of the second QoS flow.

After receiving an indication from the UPF network element that the rate requirement is not met, the SMF network element can allocate the optional QoS flow, that is, the second QoS flow, to the first service flow, which can also be understood as mapping the first service flow to the second QoS flow. Second QoS flow, or select part or all of the available QoS flows as alternative QoS flows, and carry the information of the alternative QoS flow in the configuration message issued.

506. The UPF network element maps the first service flow to the second QoS flow for transmission.

After receiving the configuration message from the SMF, the UPF network element can map the first service flow to the alternative QoS flow for transmission, thereby reducing the congestion level of the first QoS flow.

The difference between this embodiment and the aforementioned Figure 4 is that after the UPF network element receives the congestion information from the base station and determines that the transmission rate of the first service flow does not meet the rate requirement, it can send a reporting message to the SMF network element. Indicates that the transmission rate of the first service flow does not meet the rate requirements, the SMF network element delivers the information of the alternative QoS flow, and the UPF network element can map the first service flow to the alternative QoS flow for transmission, thereby reducing the first QoS flow degree of congestion.

Referring to Figure 6, a schematic flow chart of another congestion control method provided by this application is as follows.

601. The SMF network element sends a configuration message to the UPF network element, and the configuration message carries audit instructions.

602. The base station sends congestion information to the UPF network element.

603. The UPF network element determines whether the transmission rate of the first service flow meets the rate requirement. If not, perform step 604. If yes, perform other steps.

604. The UPF network element limits the speed of the first service flow.

Among them, when the UPF network element determines that the base station is in a congested state or the first service flow is not slowed down, it can perform rate limiting processing on the first service flow so that the transmission rate of the first service flow does not exceed the available rate (or available bandwidth). ), the available rate is obtained based on the congestion information, thereby reducing the transmission rate of the first service flow, thereby reducing the congestion of the first QoS flow.

For example, if the congestion information includes a congestion percentage, the service flow is slowed down based on the percentage. For example, if the congestion information indicates that the congestion percentage is 10%, the service flow needs to reduce the rate by 10%, that is, the available rate of the service flow is the current 90% of the rate; if the congestion information includes available bandwidth, the available rate of each service flow can be the average of the available bandwidth of the service flow, or if the first service flow refers to all service flows in the Qos flow, then use The available bandwidth included in the congestion information is used as the total available bandwidth of all service flows in the QoS flow.

For example, the UPF network element can perform shaping, buffering, or packet loss on the first service flow, thereby reducing the transmission rate of the first service flow.

Therefore, in the embodiment of the present application, when the application server does not slow down the first service flow, the UPF network element can perform rate limiting processing on the first service flow, thereby reducing the transmission rate of the first service flow, thereby making the first service flow The transmission rate of the service flow meets the rate requirements and reduces the congestion level of the first QoS flow.

Secondly, in the method provided by this application, in addition to the UPF network element adjusting the transmission mode of the first service flow, the SMF network element can also determine to stop ECN marking or congestion notification for the first QoS flow.

Referring to Figure 7, a schematic flow chart of another congestion control method provided by this application is as follows.

701. The SMF network element sends a configuration message to the UPF network element, and the configuration message carries audit instructions.

702. The base station sends congestion information to the UPF network element.

703. The UPF network element determines whether the transmission rate of the first service flow meets the rate requirement. If not, step 704 is executed. If yes, subsequent steps are not executed.

For steps 701 to 703, please refer to the aforementioned steps 301 to 303 in Figure 3, and will not be described again here.

704. The UPF network element sends a report message to the SMF network element, carrying an indication that the rate requirement is not met.

When the UPF network element determines that the first service flow has not been slowed down, it means that the congestion level of the first QoS flow will not be reduced. It can send a reporting message to the SMF network element, carrying the identifier of the first service flow and the number of packets that do not meet the rate requirements. Indication, the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement, that is, it notifies the SMF network element that the first service flow is not decelerated normally.

705. The SMF network element sends a stop sending congestion notification indication and/or a stop ECN mark indication to the base station.

The stop sending congestion notification indication is used to notify the base station to stop sending congestion notification, and the stop ECN mark indication is used to instruct the base station to stop performing explicit congestion notification ECN marking.

After receiving an indication that the rate requirement is not met, the SMF network element can send a notification message to the base station, which carries a congestion notification indication and/or a stop ECN mark indication, thereby notifying the base station to stop sending congestion notifications for the first QoS flow, and /or, stop ECN marking.

It can be understood that after receiving the notification message, the base station can continue to transmit the first service flow and does not perform congestion notification or stop ECN marking for the first service flow transmitted in the first QoS flow.

706. The SMF network element sends a configuration message to the UPF network element, carrying an instruction to stop auditing.

Among them, after receiving the indication that the first service flow does not meet the rate requirements, the SMF network element can send a configuration message to the UPF network element, carrying the stop audit instruction, triggering the UPF network element to stop processing the services transmitted in the first QoS flow. The transmission rate of the flow is audited. After receiving the stop audit instruction, UPF can stop auditing the rate of the service flow transmitted in the first QoS flow, that is, stop executing step 703.

Therefore, in the embodiment of the present application, when the application server does not reduce the transmission rate of the first service flow, the ECN marking or congestion notification of the first service flow may be stopped. It can be understood that the base station can stop notifying the congestion situation of the first QoS flow. When congestion occurs in the first QoS flow, the congestion level will be reduced through shaping, caching, or packet loss.

The method flow provided by this application has been introduced in detail above. For ease of understanding, the method flow provided by this application will be further introduced below based on specific application scenarios.

Referring to Figure 8, a schematic flow chart of another congestion control method provided by this application is as follows.

801. The SMF network element sends an N4 configuration message to the UPF network element, carrying alternative QoS flow information and audit instructions.

First, the SMF network element can send the first service flow identification information, alternative QoS flow information and audit instructions to the UPF network element through N4 rules. The audit instructions are optional carrying items.

Specifically, the first service flow identification information may include identification information of the first service flow, such as the IP five-tuple of the first service flow. The same QoS flow can usually transmit the business flows of one or more services.

The information of the alternative QoS flow may include the identification of the alternative QoS flow, such as QFI (QoS flow ID) or other information describing the characteristics of the QoS flow, etc., which is used to let UPF know the specific information of the available alternative QoS flow so as to facilitate UPF network elements map the transmitted service flows.

The audit instruction can be used to trigger the UPF network element to audit the service flow transmitted in the QoS flow, or it can also be understood as auditing the service flow identified by the service flow identification information.

In addition, the N4 configuration message may be sent during the establishment of the PDU session, or may be sent at any time before transmitting the first service flow. The details may be adjusted according to the actual application scenario, and this application does not limit this.

802. Transmit the first service flow in the first QoS flow.

When transmitting the first service flow, the first service flow may include uplink data or downlink data, and may be transmitted via the UPF network element, the AMF network element, the base station and the UE.

Typically, the most granular level of 5G QoS control is QoS Flow. Each QoS Flow is identified by a QoS Flow ID (QFI). QFI is the identifier used to identify QoS Flow in the 5G system. User plane traffic with the same QFI within the PDU session receives the same traffic forwarding processing (for example, scheduling, admission threshold).

QoS flow can be divided into types such as GBR (Guaranteed Bit Rate, guaranteed bit rate) and non-GBR (non-Guaranteed Bit Rate, non-guaranteed bit rate). The network provides bandwidth guarantee for GBR QoS flow, but does not provide bandwidth guarantee for non-GBR QoS flow. Usually, the QoS flow matching the first service flow can be selected to transmit data according to the actual application scenario. And usually the first business flow with the same QoS requirements is mapped to the same QoS flow for transmission, that is, one QoS flow can transmit the first business flow of one or more services.

During the transmission process, the UE and UPF network elements are configured with a Packet filter set. A Packet filter set contains multiple packet filters (packet filters) and priorities. When the downlink data packet arrives, UPF (CN_UP) uses filter to map it to a certain QoS flow, then performs the QoS control corresponding to the QoS flow, and marks the data packet with QFI in the header of the upper layer encapsulation protocol, and then passes the The N3Tunnel corresponding to the QoS flow is sent to the RAN. After receiving the packet, the RAN finds the corresponding DRB (corresponding wireless transmission resource) and QoS parameters based on the QFI, performs QoS control, and then sends the packet to the UE through the DRB.

When the UE wants to send uplink data, it maps it to a certain QoS flow through a filter, and then finds the corresponding DRB to send. After receiving it, RAN performs QoS control based on QFI, then finds the corresponding N3Tunnel and sends the packet to UPF.

803. Transmit the congestion notification to the AS.

The base station can monitor the congestion situation of the QoS flow, and when it is determined that congestion occurs or the degree of congestion is high, it can transmit a congestion notification to the AS and inform the AS to slow down the first service flow. It can be understood that when congestion occurs in the base station, the congestion information is sent to the application sending end. For example, when congestion occurs in the base station, the congestion information is sent to the application sending end through the L4S mechanism or the network capability opening interface, so that the application sending end can reduce the speed according to the congestion indication.

Usually, when the amount of data transmitted in the network is greater than the forwarding capability of the network device, network device nodes will be congested. In order to reduce the congestion of the network device, the sending end of the first business flow (such as the application server) needs to take congestion control measures, such as Reduce primary business traffic.

Typically, TCP/IP networks can indicate channel congestion by dropping packets. In the case of successful ECN negotiation, the ECN-aware router can set a flag in the IP header instead of dropping the packet to indicate that congestion is about to occur. The receiver of the packet responds to the sender's indication by reducing its transmission rate as if it normally detected packet loss. When congestion occurs in a network forwarding device (such as a router), the ECN bit in the IP header is set to CE, and the congestion information is carried in the IP packet and transmitted to the receiving end.

804. RAN sends congestion information to the UPF network element.

The congestion information may include congestion indication, congestion percentage, congestion level, available bandwidth or other information indicating congestion conditions, etc., and may be used to indicate the degree of congestion of the QoS flow.

Congestion information can be transmitted through the user plane path, for example, it can be carried through the GTP-U protocol extension header (added to the GTP-U protocol extension header by the RAN and sent to UPF). At this time, the QoS flow information corresponding to the congestion information (such as QFI) will also be carried together; Or the congestion information can be transmitted through the control plane, such as through the RAN->AMF->SMF->UPF path (not shown in Figure 8). The GTP-U protocol is the user plane tunnel protocol used in 5G networks. User data is transmitted through the GTP-U protocol between RAN and UPF and between UPF and UPF.

805. The UPF network element determines whether to reduce the speed. If not, perform step 806. If yes, do not perform subsequent steps.

After UPF receives the congestion information, it determines whether the transmission rate of the first service flow transmitted in the QoS flow meets the rate requirements, that is, it determines whether the first service flow in the QoS flow is decelerated. If the transmission rate does not meet the requirements, there is no deceleration. , then the corresponding first service flow is mapped to the alternative QoS flow for transmission.

Optionally, when the N4 configuration information carries an audit instruction, the UPF network element can measure the transmission rate of the first service flow transmitted in the first Qos flow under the trigger of the audit instruction, and determine that after receiving the congestion notification Whether the transmission rate of the first service stream decreases.

Alternatively, after receiving the congestion indication, the UPF network element starts to measure the rate of the first service flow and determines whether there is a downward trend.

Specifically, it may be to determine whether the drop value of the transmission rate of the first service flow is greater than the first threshold, or whether the transmission rate of the first service flow is lower than the second threshold, etc., indicating that the sending end has adjusted the transmission rate of the first service flow. index.

When the sending end slows down the first service flow, the UPF network element does not need to process the first service flow. When the sending end does not slow down the first service flow, the UPF network element does not need to process the first service flow. The transmission mode of the first service flow is adjusted to reduce the transmission rate of the first service flow, thereby reducing the congestion level of the QoS flow.

806. The UPF network element maps the first service flow to the alternative QoS flow for transmission.

After the UPF network element determines that the first service flow has not been slowed down, it can map the first service flow to the alternative QoS flow for transmission. The information of the alternative QoS flow may be carried in the N4 configuration message mentioned in step 801. The alternative QoS flow can be a QoS flow with a lower priority, or a QoS flow without ECN marking or congestion notification, which can be adjusted according to the actual application scenario.

When the N4 configuration message in step 801 carries the information of one QoS flow, this QoS flow can be used as an alternative QoS flow; when the N4 configuration message carries multiple QoS flows, one of the QoS flows can be selected. flow is used as an alternative QoS flow for transmission.

807. The UPF network element sends a report message to the SMF network element, carrying the information of the alternative QoS flow.

When the UPF network element determines to map the first service flow to the alternative QoS flow for transmission, it can send a report message to the SMF network element, which carries the identification information of the first service flow and the information of the alternative QoS flow to notify the SMF network. The element maps the first service flow to the alternative QoS flow for transmission.

808. The first service flow is mapped to the alternative QoS flow for transmission.

After the SMF network element receives the reported message, it can negotiate with the AMF network element, RAN, and UE to map the first service flow to the QoS flow for transmission.

Therefore, in the implementation of this application, the SMF network element can send the available QoS flow information to the UPF network element through the N4 configuration message in advance, and the UPF network element can audit the transmission rate of the first service flow. When the first service flow is determined When the flow does not slow down normally, the first service flow can be mapped to the alternative QoS flow for transmission, thereby reducing the congestion level of the QoS flow.

Referring to Figure 9, a schematic flow chart of another congestion control method provided by this application is as follows.

For similar steps, please refer to the relevant introduction in FIG. 8 . This application will not describe them in detail. Only the steps with differences will be introduced.

901. The SMF network element sends an N4 configuration message to the UPF network element, carrying audit instructions.

902. Transmit the first service flow in the first QoS flow.

903. Transmit the congestion notification to the AS.

904. RAN sends congestion information to the UPF network element.

905. The UPF network element determines whether to reduce the speed. If not, step 906 is executed. If yes, subsequent steps are not executed.

Among them, steps 901 to 905 can refer to the aforementioned steps 801 to 805. The difference is that the N4 configuration message in step 901 does not carry the information of the alternative QoS flow. The similarities will not be repeated here.

906. The UPF network element sends a report message to the SMF network element, carrying an indication that the rate requirement is not met.

After the UPF network element determines that the first service flow has not been slowed down, it can send a reporting message to the SMF network element, carrying an indication that the rate requirement is not met, that is, instructing the SMF network element to map the first service flow to the alternative QoS flow. .

907. The SMF network element sends an N4 configuration message carrying alternative QoS flow information to the UPF network element.

After receiving the indication from the UPF network element that the rate requirement is not met, the SMF network element can map the first service flow to the available alternative QoS flow, and send the alternative QoS flow to the UPF network element through the N4 configuration message. information.

908. The first service flow is mapped to the alternative QoS flow for transmission.

After the SMF network element maps the first service flow to the alternative QoS flow, it can negotiate with the AMF network element, RAN, and UE to map the first service flow to the QoS flow for transmission.

Therefore, in the embodiment of the present application, after congestion occurs at the base station, when the UPF network element determines that the first service flow has not been slowed down, it can report to the SMF network element an indication that the rate requirement is not met, thereby notifying the SMF network element to send the first service flow to the SMF network element. Business flows are mapped to alternative QoS flows for transmission, thereby reducing base station congestion.

Referring to Figure 10, a schematic flow chart of another congestion control method provided by this application is as follows.

1001. The SMF network element sends an N4 configuration message to the UPF network element, carrying audit instructions.

1002. Transmit the first service flow in the first QoS flow.

1003. Transmit the congestion notification to the AS.

1004. RAN sends congestion information to the UPF network element.

1005. The UPF network element determines whether to reduce the speed. If not, perform step 1006. If yes, perform other steps.

Among them, steps 1001 to 1005 can refer to the aforementioned steps 801 to 805. The difference is that the N4 configuration message in step 901 does not carry the information of the alternative QoS flow. The similarities will not be repeated here.

1006. The UPF network element performs rate limiting on the first service flow.

After the UPF network element determines that the first service flow has not been slowed down, it can limit the speed of the first service flow, thereby reducing the transmission rate or occupied transmission bandwidth of the first service flow, thereby reducing the congestion level of the QoS flow.

Specifically, the rate percentage that each service flow should be reduced can be calculated based on the congestion percentage information carried in the congestion information, and the rate of the service flow is limited according to the calculated rate.

Alternatively, the available bandwidth of each service flow can be calculated based on the available bandwidth information carried in the congestion information, and the service flow can be rate-limited according to the calculated rate.

Specific rate limiting methods may include shaping, buffering, or packet loss, thereby reducing the transmission rate of business flows.

Therefore, in the implementation of this application, after the UPF network element determines that the first service flow has not been slowed down, it can limit the speed of the first service flow, thereby reducing the transmission rate or occupied transmission bandwidth of the first service flow, thereby Reduce the congestion level of QoS flow.

Referring to Figure 11, a schematic flow chart of another congestion control method provided by this application is as follows.

1101. The SMF network element sends an N4 configuration message to the UPF network element, carrying audit instructions.

1102. Transmit the service flow in the first QoS flow.

1103. Transmit the congestion notification to the AS.

1104. RAN sends congestion information to the UPF network element.

1105. The UPF network element determines whether to reduce the speed. If not, perform step 1106. If yes, perform other steps.

Among them, steps 1101 to 1105 can refer to the aforementioned steps 801 to 805. The difference is that the N4 configuration message in step 901 does not carry the information of the alternative QoS flow. The similarities will not be repeated here.

1106. The UPF network element sends a report message to the SMF network element, carrying an indication that the rate requirement is not met.

1107. The SMF network element notifies the base station to stop sending the congestion notification indication and/or stop the ECN mark indication.

After receiving an indication that the rate requirement is not met, the SMF network element can send a notification message to the base station, carrying a congestion notification indication and/or a stop ECN mark indication, thereby notifying the base station to stop sending congestion notifications for the first QoS flow, and/ Or, stop ECN marking remember.

1108. The SMF network element sends a configuration message to the UPF network element, carrying an instruction to stop auditing.

Among them, after the SMF network element receives an indication that the first service flow does not meet the rate requirements, it can send a configuration message to the UPF network element, which carries a stop audit instruction, which is used to trigger the UPF network element to stop auditing the first Qos flow. The transmission rate of the first service flow transmitted is audited. After UPF receives the stop audit instruction, it can stop auditing the rate of the first service flow transmitted in the first Qos flow.

Therefore, in the embodiment of the present application, when the sending end does not reduce the transmission rate of the first service flow, the ECN marking or congestion notification of the first service flow may be stopped. It can be understood that the RAN can stop notifying the congestion situation of the first QoS flow. When congestion occurs in the first QoS flow, the RAN can use shaping, caching, or packet loss, etc. to reduce congestion.

The method steps provided by this application are introduced above, and the device for executing the method is introduced below.

Referring to Figure 12, a schematic structural diagram of a congestion control device provided by this application includes:

The transceiver module 1201 is used to receive congestion information from the base station, and the congestion information is used to indicate the congestion situation of the first Qos flow in the base station;

The processing module 1202 is used to adjust the transmission mode of the first service flow if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement of the first service flow. The rate requirement can be determined through congestion information.

In a possible implementation, the processing module 1202 is specifically configured to map the first service flow to the second Qos flow for transmission.

In a possible implementation, the transceiver module 1201 is also used to send information about the second Qos flow to the session management function SMF network element. The information about the second Qos flow is used to trigger mapping of the first service flow to the second Qos flow. transmitted in flow.

In a possible implementation, the transceiver module 1201 is also configured to receive the first configuration message from the SMF network element before the UPF network element receives the congestion information from the base station. The first configuration message carries the second Qos flow. Information, the second QoS flow is the alternative QoS flow for the service flow transmitted in the first QoS flow.

In a possible implementation, the transceiver module 1201 is also configured to send an indication that the rate requirement is not met to the session management function SMF network element. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement. Require;

The transceiver module 1201 is also used to receive the third Qos flow information sent from the SMF network element;

The processing module 1202 is specifically used to map the first service flow to the third Qos flow for transmission.

In a possible implementation, the processing module 1202 is specifically configured to perform rate limiting processing on the first service flow, so that the transmission rate of the first service flow does not exceed the available rate, and the available rate is obtained based on congestion information.

In a possible implementation, the rate requirement includes: the drop value of the transmission rate within a preset period is greater than a first threshold, or the transmission rate is lower than a second threshold.

In a possible implementation, the transceiver module 1201 is also used to receive an audit instruction from the SMF network element before the UPF network element receives the congestion information from the base station. The audit instruction is used to trigger the UPF network element to determine the first Qos flow. Whether the transmission rate of the first service stream transmitted in the network meets the rate requirements.

In a possible implementation, the congestion information includes at least one of the following: congestion indication, congestion level, congestion percentage or available bandwidth. The congestion indication is used to indicate that congestion occurs in the first Qos flow. The congestion percentage indicates that congestion occurs in the first Qos flow. The percentage of congested packets. The available bandwidth is the bandwidth that can be used by the first Qos flow.

Referring to Figure 13, a schematic structural diagram of a congestion control device provided by this application includes:

The transceiver module 1301 is used to send audit instructions to the UPF network element. The audit instructions are used to instruct the UPF network element to determine the transmission rate of the first service flow transmitted in the first Qos flow when the base station sends congestion information to the UPF network element. Whether the rate requirements are met, the congestion information is used to indicate the congestion situation of the first Qos flow in the base station.

The congestion control device may also include a processing module 1302, which may be used to process received messages or generate sent messages, etc.

In a possible implementation, the audit instruction is carried in the first configuration message, and the first configuration message also carries information about the second Qos flow, so that the UPF network element determines the first service transmitted in the first Qos flow. When the transmission rate of the flow does not meet the rate requirement, the first service flow is mapped to the second Qos flow for transmission.

In a possible implementation, the transceiver module 1301 is also configured to receive information about the second Qos flow from the UPF network element, and is used to trigger mapping of the first service flow to the second Qos flow for transmission.

In a possible implementation, the transceiver module 1301 is also configured to receive an indication from the UPF network element that the rate requirement is not met. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The transceiver module 1301 is also used to send the third Qos flow information to the UPF network element, so that the UPF network element maps the first service flow to the third Qos flow for transmission.

Referring to Figure 14, a schematic structural diagram of a congestion control device provided by this application includes:

The transceiver module 1401 is used to receive congestion information from the base station. The congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

The transceiver module 1401 is also used to send an indication that the rate requirement is not met to the session management function SMF network element if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement. The indication is used to indicate that the transmission rate of the first service flow does not meet the rate requirement.

The congestion control device may also include a processing module 1402, which may be used to process received messages or generate sent messages, etc.

In a possible implementation, the transceiver module 1401 is also configured to receive an audit instruction from the SMF network element before receiving the congestion information from the base station. The audit instruction is used to trigger the UPF network element to determine the traffic transmitted in the first Qos flow. Whether the transmission rate of the first service flow meets the rate requirements.

In a possible implementation, the transceiver module 1401 is also configured to receive a stop audit instruction from the SMF network element after sending an indication that the rate requirement is not met to the session management function SMF network element. The stop audit instruction is used to trigger UPF. The network element stops to determine whether the transmission rate of the first service flow transmitted in the first Qos flow meets the rate requirement.

Referring to Figure 15, a schematic structural diagram of a congestion control device provided by this application includes:

The transceiver module 1501 is used to send audit instructions to the user plane function UPF network element. The audit instructions are used to trigger the UPF network element to determine the first service flow transmitted in the first Qos flow when the base station sends congestion information to the UPF network element. Whether the transmission rate meets the rate requirements;

The transceiver module 1501 is also used to receive an indication from the UPF network element that the rate requirement is not met. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The transceiver module 1501 is also used to send a notification message to the base station. The notification message is used to notify the base station to stop sending congestion notifications for the congestion situation of the first QoS flow, and/or the notification message is used to instruct the base station to stop transmitting in the first QoS flow. The service flow carries explicit congestion notification ECN marking.

The congestion control device may also include a processing module 1502, which may be used to process received messages or generate sent messages, etc.

In a possible implementation, the transceiver module 1501 is also used to send a stop audit instruction to the UPF network element. The stop audit instruction is used to trigger the UPF network element to stop judging the transmission rate of the first service flow transmitted in the first Qos flow. Whether the speed requirements are met.

This application also provides a congestion control device 1600. Please refer to Figure 16 for an example of the congestion control device in the embodiment of this application. The congestion control device can be a UPF network element, or a chip or chip system located on the UPF network element. The congestion control device can be used to perform the steps performed by the UPF network element in the embodiments shown in Figures 3 to 6 and Figures 8 to 10. Reference can be made to the relevant descriptions in the above method embodiments.

The congestion control device 1600 includes: a processor 1601, a memory 1602, an input and output device 1603, and a bus 1604.

In a possible implementation, the processor 1601, the memory 1602, and the input and output device 1603 are respectively connected to the bus 1604, and computer instructions are stored in the memory.

The processing module 1202 in the embodiment shown in FIG. 12 may specifically be the processor 1601 in this embodiment, so the specific implementation of the processor 1601 will not be described again. The transceiver module 1201 in the embodiment shown in FIG. 12 may specifically be the input and output device 1603 in this embodiment, so the specific implementation of the input and output device 1603 will not be described again.

This application also provides a congestion control device 1700. Please refer to Figure 17 for an example of the congestion control device in the embodiment of this application. The congestion control device can be an SMF network element, or a chip or chip system located on the SMF network element. The congestion control device can be used to perform the steps performed by the SMF network element in the embodiments shown in Figures 3 to 6 and Figures 8 to 10. Reference can be made to the relevant descriptions in the above method embodiments.

The congestion control device 1700 includes: a processor 1701, a memory 1702, an input and output device 1703, and a bus 1704.

In a possible implementation, the processor 1701, the memory 1702, and the input and output device 1703 are respectively connected to the bus 1704, and computer instructions are stored in the memory.

The processing module 1302 in the embodiment shown in FIG. 13 may specifically be the processor 1701 in this embodiment, so the specific implementation of the processor 1701 will not be described again. The transceiver module 1301 in the embodiment shown in FIG. 13 may specifically be the input and output device 1703 in this embodiment, so the specific implementation of the input and output device 1703 will not be described again.

This application also provides a congestion control device 1800. Please refer to Figure 18 for an example of the congestion control device in the embodiment of this application. The congestion control device can be a UPF network element, or a chip or chip system located on the UPF network element. The congestion control device can be used to perform the steps performed by the UPF network element in the embodiments shown in Figures 7 and 11. Reference can be made to the relevant descriptions in the above method embodiments.

The congestion control device 1800 includes: a processor 1801, a memory 1802, an input and output device 1803, and a bus 1804.

In a possible implementation, the processor 1801, the memory 1802, and the input and output device 1803 are respectively connected to the bus 1804, and computer instructions are stored in the memory.

The processing module 1402 in the embodiment shown in FIG. 14 may specifically be the processor 1801 in this embodiment, so the specific implementation of the processor 1801 will not be described again. The transceiver module 1401 in the embodiment shown in FIG. 14 may specifically be the input and output device 1803 in this embodiment, so the specific implementation of the input and output device 1803 will not be described again.

This application also provides a congestion control device 1900. Please refer to Figure 19 for an example of the congestion control device in the embodiment of this application. The congestion control device can be an SMF network element, or a chip or chip system located on the SMF network element. The congestion control device can be used to perform the steps performed by the SMF network element in the embodiments shown in Figures 7 and 11. Reference can be made to the relevant descriptions in the above method embodiments.

The congestion control device 1900 includes: a processor 1901, a memory 1902, an input and output device 1903, and a bus 1904.

In one possible implementation, the processor 1901, the memory 1902, and the input and output device 1903 are respectively connected to the bus 1904, and computer instructions are stored in the memory.

The processing module 1502 in the embodiment shown in FIG. 15 may specifically be the processor 1901 in this embodiment, so the specific implementation of the processor 1901 will not be described again. The transceiver module 1501 in the embodiment shown in FIG. 15 may specifically be the input and output device 1903 in this embodiment, so the specific implementation of the input and output device 1903 will not be described again.

Please refer to Figure 20. This embodiment of the present application also provides a communication processing system. The communication processing system includes a communication processing device. Specifically, the communication processing device may include a UPF network element and an SMF network element; wherein, the UPF network element may be In performing all or part of the steps performed by the UPF network element in the embodiments shown in Figures 3 to 6 and Figures 8 to 10, the SMF network element is used to perform the implementations shown in Figures 3 to 6 and Figures 8 to 10 All or part of the steps performed by the SMF network element in the example.

Please refer to Figure 21. This embodiment of the present application also provides a communication processing system. The communication processing system includes a communication processing device. Specifically, the communication processing device may include a UPF network element and an SMF network element; wherein, the UPF network element may be In order to perform all or part of the steps performed by the UPF network element in the embodiments shown in Figures 7 and 11, the SMF network element is used to perform all or part of the steps performed by the SMF network element in the embodiments shown in Figures 7 and 11.

The embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port. The processor is used to implement the processing functions involved in the embodiments shown in FIGS. 3 to 11. The input The /output port is used to implement the transceiver functions involved in the embodiments shown in Figures 3 to 11.

In a possible design, the chip system further includes a memory, which is used to store program instructions and data for implementing the functions involved in the embodiments shown in FIGS. 3 to 11 .

According to the method provided by the embodiment of the present application, the present application also provides a computer program product. The computer program product includes: computer program code. When the computer program code is run on a computer, it causes the computer to execute the steps shown in Figures 3 to 11. Example methods.

According to the method provided by the embodiment of the present application, the present application also provides a computer-readable medium. The computer-readable medium stores program code. When the program code is run on a computer, it causes the computer to execute the steps shown in Figures 3 to 11. Example methods.

An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is configured to execute the method in any of the above method embodiments.

It should be understood that the above processing device may be a chip. For example, the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), or It can be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller unit , MCU), it can also be a programmable logic device (PLD) or other integrated chip.

During the implementation process, each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor. The steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. . Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

The UPMF network element, UDM network element, AMF network element and SMF network element in the communication processing device and method embodiments in the above device embodiments are completely corresponding, and the corresponding steps are performed by the corresponding modules or units, such as communication units (transceivers) To perform the step of receiving or sending in the method embodiment, other steps except sending and receiving may be executed by the processing unit (processor). For the functions of specific units, please refer to the corresponding method embodiments. There can be one or more processors.

In this application, "at least one" means one or more, and "plurality" means two or more. "And/or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one item (item) of a, b or c can represent: a, b, c, a-b, a-c, b-c or a-b-c, where a, b, c can be single or multiple.

Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled technicians may use different methods to achieve the described functions for each specific application, but such implementations should not be considered beyond the scope of this document. Scope of application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

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

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or software functional units.

In the above embodiments, the functions of each functional unit may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state disk (SSD)), etc.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the 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 are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .

As mentioned above, the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still make the foregoing technical solutions. The technical solutions described in each embodiment may be modified, or some of the technical features may be equivalently replaced; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in each embodiment of the present application.

Claims

A congestion control method, characterized by including:

The user plane function UPF network element receives congestion information from the base station, and the congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

If the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement of the first service flow, the UPF network element adjusts the transmission mode of the first service flow.
The method according to claim 1, characterized in that the UPF network element adjusts the transmission mode of the first service flow, including:

The UPF network element maps the first service flow to the second Qos flow for transmission.
The method of claim 2, further comprising:

The UPF network element sends the information of the second Qos flow to the session management function SMF network element to trigger the mapping of the first service flow to the second Qos flow for transmission.
The method according to claim 2 or 3, characterized in that, the method further includes:

Before the UPF network element receives the congestion information from the base station, the UPF network element receives the first configuration message from the SMF network element, and the first configuration message carries the information of the second Qos flow, so The second QoS flow is an alternative QoS flow for the service flow transmitted in the first QoS flow.
The method according to claim 1, characterized in that the UPF network element adjusts the transmission mode of the first service flow, including:

The UPF network element sends an indication that the rate requirement is not met to the session management function SMF network element. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The UPF network element receives the third Qos flow information sent from the SMF network element;

The UPF network element maps the first service flow to the third Qos flow for transmission.
The method according to claim 1, characterized in that the UPF network element adjusts the transmission mode of the first service flow, including:

The UPF network element performs rate limiting processing on the first service flow so that the transmission rate of the first service flow does not exceed an available rate, and the available rate is obtained according to the congestion information.
The method according to any one of claims 1 to 6, characterized in that the rate requirement includes: the drop value of the transmission rate within a preset period is greater than a first threshold, or the transmission rate is lower than a first threshold. Two thresholds, or the transmission rate is not higher than the available rate.
The method according to any one of claims 1 to 7, characterized in that before the UPF network element receives the congestion information from the base station, the method further includes:

The UPF network element receives an audit instruction from the SMF network element, and the audit instruction is used to trigger the UPF network element to determine whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate requirement.
The method according to any one of claims 1-8, characterized in that the congestion information includes at least one of the following:

Congestion indication, congestion level, congestion percentage or available bandwidth, the congestion indication is used to indicate that the first Qos flow is congested, the congestion percentage represents the percentage of data packets that are congested in the first Qos flow, the The available bandwidth is the bandwidth that can be used by the first Qos flow.
A congestion control method, characterized by including:

The session management function SMF network element sends an audit instruction to the user plane function UPF network element. The audit instruction is used to trigger the UPF network element to determine whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate requirement. The congestion information is used to indicate the congestion situation of the first Qos flow in the base station.
The method according to claim 10, characterized in that the audit indication is carried in a first configuration message, and the first configuration message also carries information about the second Qos flow, so that the UPF network element determines When the transmission rate of the first service flow transmitted in the first Qos flow does not meet the rate requirement, the first service flow is mapped to the second Qos flow for transmission.
The method according to claim 11, characterized in that, the method further includes:

The SMF network element receives the information of the second Qos flow from the UPF network element, which is used to trigger mapping of the first service flow to transmitted in the second Qos flow.
The method of claim 10, further comprising:

The SMF network element receives an indication from the UPF network element that the rate requirement is not met, and the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The SMF network element sends the third Qos flow information to the UPF network element, for the UPF network element to map the first service flow to the third Qos flow for transmission.
A congestion control method, characterized by including:

The user plane function UPF network element receives congestion information from the base station, and the congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

If the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement, the UPF network element sends an indication that the rate requirement is not met to the session management function SMF network element, and the rate does not meet the rate requirement. The required indication is used to indicate that the transmission rate of the first service flow does not meet the rate requirement.
The method according to claim 14, characterized in that, before the UPF network element receives the congestion information from the base station, the method further includes:

The UPF network element receives an audit instruction from the SMF network element, and the audit instruction is used to trigger the UPF network element to determine whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate requirement.
The method according to claim 15, characterized in that after the UPF network element sends an indication that the rate requirement is not met to the session management function SMF network element, the method further includes:

The UPF network element receives a stop audit instruction from the SMF network element. The stop audit instruction is used to trigger the UPF network element to stop judging whether the transmission rate of the service flow transmitted in the first Qos flow meets the requirements. Rate requirements.
A congestion control method, characterized by including:

The session management function SMF network element receives an indication from the UPF network element that the rate requirement is not met, and the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The SMF network element sends a notification message to the base station, the notification message is used to notify the base station to stop sending congestion notifications for the congestion situation of the first Qos flow, and/or the notification message is used to indicate that the The base station stops performing explicit congestion notification ECN marking on the service flow transmitted in the first QoS flow.
The method according to claim 17, characterized in that the session management function SMF network element sends an audit instruction to the user plane function UPF network element, and the audit instruction is used to trigger the UPF network element to judge the transmission in the first Qos flow. Whether the transmission rate of the service flow meets the rate requirements.
The method of claim 18, further comprising:

The SMF network element sends a stop audit instruction to the UPF network element. The stop audit instruction is used to trigger the UPF network element to stop judging whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate. Require.
A congestion control method, characterized by including:

The session management function SMF network element sends a first configuration message to the user plane function UPF network element. The first configuration message is used to trigger the UPF network element to determine whether the transmission rate of the service flow transmitted in the first Qos flow meets the required requirements. The above rate requirements;

The UPF network element receives congestion information from the base station, and the congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

If the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement of the first service flow, the UPF network element adjusts the transmission mode of the first service flow.
The method according to claim 20, characterized in that the UPF network element adjusts the transmission mode of the first service flow, including:

The UPF network element maps the first service flow to the second Qos flow for transmission.
The method according to claim 21, characterized in that, the method further includes:

The SMF network element receives the information of the second Qos flow from the UPF network element, which is used to trigger mapping of the first service flow to the second Qos flow for transmission.
The method according to claim 21 or 22, characterized in that the first configuration message carries an audit instruction, and the audit instruction is used to trigger the UPF network element to determine whether the transmission rate of the service flow transmitted in the first Qos flow is To meet the rate requirement, the first configuration message also carries information about the second QoS flow, and the second QoS flow is an alternative QoS flow for the service flow transmitted in the first QoS flow.
The method according to any one of claims 20-23, characterized in that the method further includes:

The UPF network element sends an indication that the rate requirement is not met to the session management function SMF network element. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement.
The method of claim 24, further comprising:

The SMF network element sends the third Qos flow information to the UPF network element;

The UPF network element maps the first service flow to the third Qos flow for transmission.
The method of claim 24, further comprising:

The SMF network element sends a notification message to the base station, the notification message is used to notify the base station to stop sending congestion notifications for the congestion situation of the first Qos flow, and/or the notification message is used to indicate that the The base station stops performing explicit congestion notification ECN marking on the service flow transmitted in the first QoS flow.
The method of claim 26, further comprising:

The SMF network element sends a stop audit instruction to the UPF network element. The stop audit instruction is used to trigger the UPF network element to stop judging whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate. Require.
The method according to any one of claims 20-27, characterized in that the congestion information includes at least one of the following:

Congestion indication, congestion level, congestion percentage or available bandwidth, the congestion indication is used to indicate that the first Qos flow is congested, the congestion percentage represents the percentage of data packets that are congested in the first Qos flow, the The available bandwidth is the bandwidth that can be used by the first Qos flow.
The method according to claim 20, characterized in that the UPF network element adjusts the transmission mode of the first service flow, including:

The UPF network element performs rate limiting processing on the first service flow so that the transmission rate of the first service flow does not exceed an available rate, and the available rate is obtained according to the congestion information.
The method according to any one of claims 20 to 29, characterized in that the rate requirement includes: the drop value of the transmission rate within a preset period is greater than a first threshold, or the transmission rate is lower than a first threshold. Two thresholds, or the transmission rate is not higher than the available rate.
A congestion control device, characterized by including:

A transceiver module, configured to receive congestion information from the base station, where the congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

A processing module configured to adjust the transmission mode of the first service flow if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement of the first service flow.
The device according to claim 31, characterized in that:

The processing module is specifically used to map the first service flow to the second Qos flow for transmission.
The device according to claim 32, characterized in that:

The transceiver module is also used to send the information of the second Qos flow to the session management function SMF network element. The information of the second Qos flow is used to trigger the mapping of the first service flow to the second Qos flow. transmission.
The device according to claim 32 or 33, characterized in that:

The transceiver module is also configured to receive the third message from the SMF network element before the UPF network element receives the congestion information from the base station. A configuration message, the first configuration message carries information about the second QoS flow, and the second QoS flow is an alternative QoS flow for the service flow transmitted in the first QoS flow.
The device according to claim 31, characterized in that:

The transceiver module is also configured to send an indication that the rate requirement is not met to the session management function SMF network element, and the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The transceiver module is also used to receive the third Qos flow information sent from the SMF network element;

The processing module is specifically used to map the first service flow to the third Qos flow for transmission.
The device according to claim 31, characterized in that:

The processing module is specifically configured to perform rate limiting processing on the first service flow, so that the transmission rate of the first service flow does not exceed an available rate, and the available rate is obtained according to the congestion information.
The device according to any one of claims 31 to 36, characterized in that the rate requirement includes: the drop value of the transmission rate within a preset period is greater than a first threshold, or the transmission rate is lower than a first threshold. Two thresholds, or the transmission rate is not higher than the available rate.
The device according to any one of claims 31-37, characterized in that:

The transceiver module is also configured to receive an audit instruction from the SMF network element before the UPF network element receives the congestion information from the base station. The audit instruction is used to trigger the UPF network element to determine the first Qos flow. Whether the transmission rate of the service flow being transmitted meets the rate requirement.
The device according to any one of claims 31-38, characterized in that the congestion information includes at least one of the following:

Congestion indication, congestion level, congestion percentage or available bandwidth, the congestion indication is used to indicate that the first Qos flow is congested, the congestion percentage represents the percentage of data packets that are congested in the first Qos flow, the The available bandwidth is the bandwidth that can be used by the first Qos flow.
A congestion control device, characterized by including:

The transceiver module is used to send audit instructions to the user plane function UPF network element. The audit instructions are used to trigger the UPF network element to determine whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate requirements. The congestion information is used to indicate the congestion situation of the first Qos flow in the base station.
The device according to claim 40, characterized in that the audit instruction is carried in a first configuration message, and the first configuration message also carries information about the second Qos flow, so that the UPF network element determines When the transmission rate of the first service flow transmitted in the first Qos flow does not meet the rate requirement, the first service flow is mapped to the second Qos flow for transmission.
The device according to claim 41, characterized in that:

The transceiver module is also used to receive information from the second Qos flow of the UPF network element, and to trigger mapping of the first service flow to the second Qos flow for transmission.
The device according to claim 40, characterized in that:

The transceiver module is also configured to receive an indication from the UPF network element that the rate requirement is not met, and the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The transceiver module is also configured to send the third Qos flow information to the UPF network element, so that the UPF network element can map the first service flow to the third Qos flow for transmission.
A congestion control device, characterized by including:

A transceiver module, configured to receive congestion information from the base station, where the congestion information is used to indicate the congestion situation of the first quality of service flow Qos flow in the base station;

The transceiver module is also used to send an indication that the rate requirement is not met to the session management function SMF network element if the transmission rate of the first service flow transmitted in the first QoS flow in the base station does not meet the rate requirement. The indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement.
The device according to claim 44, characterized in that:

The transceiver module is also used to receive an audit instruction from the SMF network element before receiving the congestion information from the base station. The audit instruction is used to trigger the UPF network element to determine the service flow transmitted in the first Qos flow. Whether the transmission rate meets the rate requirements.
The device according to claim 45, characterized in that:

The transceiver module is also configured to receive a stop audit instruction from the SMF network element after sending an indication that the rate requirement is not met to the session management function SMF network element. The stop audit instruction is used to trigger the UPF network element. Stop judging whether the transmission rate of the service flow transmitted in the first Qos flow meets the rate requirement.
A congestion control device, characterized by including:

A transceiver module, configured to receive an indication from the UPF network element that the rate requirement is not met, and the indication that the rate requirement is not met is used to indicate that the transmission rate of the first service flow does not meet the rate requirement;

The transceiver module is also configured to send a notification message to the base station. The notification message is used to notify the base station to stop sending congestion notifications for the congestion situation of the first Qos flow, and/or the notification message is used. Instructing the base station to stop performing explicit congestion notification ECN marking on the service flow transmitted in the first QoS flow.
The device according to claim 47, characterized in that the transceiver module is also used to send an audit instruction to the user plane function UPF network element, and the audit instruction is used to trigger the UPF network element to determine the first Qos flow. Whether the transmission rate of the transmitted service flow meets the rate requirements.
The device according to claim 48, characterized in that the transceiver module is further configured to send a stop audit instruction to the UPF network element, and the stop audit instruction is used to trigger the UPF network element to stop judging the first Whether the transmission rate of the service flow transmitted in a Qos flow meets the rate requirements.
A congestion control device, characterized in that the communication processing device includes: a processor, the processor is coupled to a memory;

The memory is used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the communication processing device executes the congestion control method according to any one of claims 1 to 9.
A congestion control device, characterized in that the communication processing device includes: a processor, the processor is coupled to a memory;

The memory is used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the communication processing device executes the congestion control method according to any one of claims 10 to 13.
A congestion control device, characterized in that the communication processing device includes: a processor, the processor is coupled to a memory;

The memory is used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the communication processing device executes the The congestion control method according to any one of claims 14 to 16.
A congestion control device, characterized in that the communication processing device includes: a processor, the processor is coupled to a memory;

The memory is used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the communication processing device executes the congestion control method according to any one of claims 17 to 19.
A communication system, characterized in that the communication system includes the congestion control device according to any one of claims 31 to 39, and the congestion control device according to any one of claims 40 to 43.
A communication system, characterized in that the communication system includes the congestion control device according to any one of claims 44 to 46, and the congestion control device according to any one of claims 47 to 49.
A computer program product containing instructions, characterized in that, when run on a computer, it causes the computer to perform the method according to any one of claims 1 to 19.
A computer-readable storage medium, characterized by comprising instructions that, when run on a computer, cause the computer to perform the method according to any one of claims 1 to 19.