CN108632887B

CN108632887B - Method and system for controlling transmission rate

Info

Publication number: CN108632887B
Application number: CN201710178633.5A
Authority: CN
Inventors: 王晓燕
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-03-23
Filing date: 2017-03-23
Publication date: 2021-01-01
Anticipated expiration: 2037-03-23
Also published as: CN108632887A

Abstract

The application provides a method and a system for controlling transmission rate, wherein the method comprises the following steps: a first policy control function PCF acquires a first user equipment aggregation maximum bit rate UE-AMBR of user equipment UE; the first PCF acquires a first Session aggregation maximum bit rate Session-AMBR set corresponding to the connection of the packet data unit PDU on the UE, wherein each Session-AMBR in the first Session-AMBR set is used for connecting a corresponding activation Session-AMBR to each PDU of the UE; and the first PCF determines a second UE-AMRB according to the first UE-AMBR and the first Session-AMBR set, and the second UE-AMRB is used for controlling the transmission rate of the UE. The embodiment of the application can control the data transmission rate of the UE in the 5G system, thereby improving the data transmission efficiency of the system.

Description

Method and system for controlling transmission rate

Technical Field

The present application relates to the field of communications, and more particularly, to a method and system for controlling transmission rates.

Background

An Evolved Packet System (EPS) introduces a User Equipment Aggregated Maximum Bit Rate (UE-AMBR), where the UE-AMBR refers to an Aggregated Maximum Bit Rate of a User Equipment (UE) and is used to limit a data Rate of an unsecured service flow of the UE. For example, the UE-AMBR of a certain UE is 2Mbps, and the data rate of the video service is 1Mbps, that is, when the UE initiates the video service and other non-guaranteed services, the data rate limit on the non-guaranteed service on the UE cannot exceed 2Mbps, and the data rate of the video service is guaranteed to be 1 Mbps.

In the 5G system, a Session Management Function (SMF) is responsible for Session Management, and an Access and Mobility Management Function (AMF) is responsible for Access and Mobility Management, and since the AMF cannot sense a Packet Data Unit (PDU) Session, that is, cannot identify a Session Aggregated Maximum Bit Rate (Session-AMBR), it cannot determine a UE-AMBR, and thus cannot control a transmission Rate of the UE in the 5G system. Therefore, a method capable of controlling a transmission rate of a UE in a 5G system is urgently needed.

Disclosure of Invention

The application provides a method and a system for controlling transmission rate, which can control the data transmission rate of UE and improve the efficiency of system data transmission.

In a first aspect, a method for controlling a transmission rate is provided, including: a first policy control function PCF acquires a first user equipment aggregation maximum bit rate UE-AMBR of user equipment UE; the first PCF acquires a first Session aggregation maximum bit rate Session-AMBR set, wherein the first Session-AMBR set comprises an activation Session-AMBR corresponding to the connection of all Packet Data Units (PDU) supported by the UE; and the first PCF determines a second UE-AMRB according to the first UE-AMBR and the first Session-AMBR set, wherein the second UE-AMRB is used for controlling the transmission rate of the UE.

The first PCF acquires a first UE-AMBR of the UE and a first Session-AMBR set which is connected with the corresponding activated Session-AMBR of all PDU including the UE, and determines a second UE-AMRB according to the first UE-AMBR and the first Session-AMBR set, so that the first PCF can determine the second UE-AMBR according to the first UE-AMBR configured for the UE in advance and all current Session-AMBRs, and sends the second UE-AMBR to the RAN, and the RAN limits the data transmission rate of the UE according to the second UE-AMBR, thereby improving the efficiency of system data transmission.

In one possible implementation, the method further includes: the first PCF sends a subscription message to a user database UDR, wherein the subscription message is used for indicating that the first PCF is informed when a Session-AMBR in a first Session-AMBR set of the UDR changes; wherein the acquiring, by the first PCF, the first Session-AMBR set comprises: and the first PCF receives a subscription notification message sent by the UDR, wherein the subscription notification message carries the first Session-AMBR set.

The first PCF can send a subscription request to the UDR, and the UDR informs the first PCF when the activation Session-AMBR of a PDU changes after the first PCF sends the subscription request, so that the power consumption of the UDR is saved.

In one possible implementation, the acquiring, by the first PCF, the first Session-AMBR set includes: the second PCF receives the strategy request information, and the strategy request information is used for requesting the strategy information of the first PDU connection; the second PCF acquires a Session-AMBR set signed by the first PDU connection from a user database UDR according to the strategy request information, wherein the signed Session-AMBR set comprises at least one Session-AMBR corresponding to the first PDU connection; the second PCF determines that the first PDU in the signed Session-AMBR set is connected with a corresponding first activation Session-AMBR; the second PCF sends the first active Session-AMBR to the UDR; the first PCF receives a first Session-AMBR set from the UDR, the first Session-AMBR set is generated by updating a second Session-AMBR set by the UDR according to the first activation Session-AMBR, and each Session-AMBR in the second Session-AMBR set connects a corresponding activation Session-AMBR for each PDU of the UE before receiving the first activation Session-AMBR.

And when the active Session-AMBR in the second Session-AMBR set changes, sending the updated first Session-AMBR set to the second PCF, so that the second PCF can obtain new data in time, control the data transmission rate of the UE according to the new data, and further improve the data transmission efficiency.

In one possible implementation, the acquiring, by the first PCF, the first Session-AMBR set includes: the second PCF receives the strategy request information, and the strategy request information is used for requesting the strategy information of the first PDU connection; the second PCF acquires a signed Session-AMBR set connected with the first PDU from the UDR according to the strategy request information, wherein the signed Session-AMBR set comprises at least one Session-AMBR corresponding to the first PDU connection; the second PCF determines that the first PDU in the signed Session-AMBR set is connected with a corresponding first activation Session-AMBR; the first PCF receives the first active Session-AMBR sent by the second PCF; and the first PCF updates a second Session-AMBR set through the first activation Session-AMBR to generate the first Session-AMBR set, wherein each Session-AMBR in the second Session-AMBR set connects corresponding activation Session-AMBR to each PDU of the UE before receiving the first activation Session-AMBR.

And when the second PCF obtains the new active Session-AMBR, the second PCF sends the new active Session-AMBR to the first PCF, so that the first PCF can obtain new data in time, and controls the data transmission rate of the UE according to the new data, thereby further improving the data transmission efficiency.

In one possible implementation, the method further includes: the first PCF receives a context session establishment request sent by the AMF, wherein the context session establishment request carries the identifier of the UE; wherein, the first PCF obtaining the first UE-AMBR of the UE includes: and the first PCF acquires the first UE-AMBR from the UDR according to the identity of the UE.

And the first UE-AMBR is acquired according to the identity of the UE, so that the acquisition efficiency of acquiring the first UE-AMBR of the UE is improved.

In one possible implementation manner, the determining, by the first PCF, a second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set includes: the first PCF determines a Session-AMBR sum value of the first Session-AMBR set according to the first Session-AMBR set; the first PCF determines a minimum value of a sum value of the first UE-AMBR and the Session-AMBR of the first Session-AMBR set as the second UE-AMBR.

The first PCF determines a summation value of the activated Session-AMBRs in the first Session-AMBR set, determines the summation value and the minimum value of the first UE-AMBR as a second UE-AMBR, and limits the transmission rate of the UE through the second UE-AMBR, so that the efficiency of system data transmission is improved.

In a second aspect, a method for controlling a transmission rate is provided, including: accessing a mobility management function (AMF) to acquire a first User Equipment (UE) aggregation maximum bit rate (UE-AMBR) of the UE; the AMF receives a Session-AMBR sum value of a first Session aggregation maximum bit rate Session-AMBR set sent by a first PCF, wherein each Session-AMBR in the first Session-AMBR set connects a corresponding activation Session-AMBR for each PDU of the UE; the AMF determines a second UE-AMRB according to the first UE-AMBR and a Session-AMBR sum value of the first Session-AMBR set; the AMF transmits the second UE-AMBR to the radio access point RAN.

The AMF acquires a first UE-AMBR of the UE and a Session-AMBR sum value of a first Session-AMBR set which activates the Session-AMBR and is corresponding to all PDU connections of the UE, and determines a second UE-AMRB according to the first UE-AMBR and the Session-AMBR sum value, so that the AMF can determine the second UE-AMBR according to the first UE-AMBR configured for the UE in advance and all current Session-AMBRs, and sends the second UE-AMBR to the RAN, and the RAN limits the data transmission rate of the UE according to the second UE-AMBR, thereby improving the efficiency of system data transmission.

In a possible implementation manner, before the AMF receives the Session-AMBR summation value sent by the first PCF, the method further includes: the second PCF receives the strategy request information, and the strategy request information is used for requesting the strategy information of the first PDU connection; the second PCF acquires a Session-AMBR set signed by the first PDU connection from a user database UDR according to the strategy request information, wherein the signed Session-AMBR set comprises at least one Session-AMBR corresponding to the first PDU connection; the second PCF determines that the first PDU in the signed Session-AMBR set is connected with a corresponding first activation Session-AMBR; the second PCF sends the first active Session-AMBR to the UDR; the first PCF receives a first Session-AMBR set from the UDR, the first Session-AMBR set is generated by updating a second Session-AMBR set by the UDR according to the first activation Session-AMBR, each Session-AMBR in the second Session-AMBR set connects a corresponding activation Session-AMBR for each PDU of the UE before receiving the first activation Session-AMBR, and determines a summation value of the Session-AMBR activated by the UE according to the first Session-AMBR set.

And determining the Session-AMBR sum value of the first Session-AMBR set through the first PCF, thereby reducing the power consumption of other network elements.

In a possible implementation manner, before the AMF receives the Session-AMBR summation value sent by the first PCF, the method further includes: the second PCF receives the strategy request information, and the strategy request information is used for requesting the strategy information of the first PDU connection; the second PCF acquires a signed Session-AMBR set connected with the first PDU from a user database UDR according to the strategy request information, wherein the signed Session-AMBR set comprises at least one Session-AMBR corresponding to the first PDU connection; the second PCF determines that the first PDU in the signed Session-AMBR set is connected with a corresponding first activation Session-AMBR; the first PCF receives the first active Session-AMBR sent by the second PCF; the first PCF updates a second Session-AMBR set to generate the first Session-AMBR set through the first activation Session-AMBR, wherein each Session-AMBR in the second Session-AMBR set connects a corresponding activation Session-AMBR to each PDU of the UE before receiving the first activation Session-AMBR; and the first PCF determines a Session-AMBR sum value of the first Session-AMBR set according to the first Session-AMBR set.

The first PCF stores the second Session-AMBR set and does not need to be updated by the UDR and then sent to the first PCF, so that the flow is saved and the power consumption of the system is reduced.

In a third aspect, a system for controlling a transmission rate is provided, which comprises means for performing the method of the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, there is provided a system for controlling a transmission rate, the system comprising means for performing the method of the second aspect or any possible implementation manner of the second aspect.

In a fifth aspect, there is provided a PCF comprising means for performing the method of the first aspect or any possible implementation manner of the first aspect.

In a sixth aspect, there is provided an AMF comprising means for performing the method of the second aspect or any possible implementation of the second aspect.

In a seventh aspect, a system for controlling a transmission rate is provided and includes a processor, a memory, and a communication interface. The processor is coupled to the memory and the communication interface. The memory is for storing instructions, the processor is for executing the instructions, and the communication interface is for communicating with other network elements under control of the processor. The processor, when executing the instructions stored by the memory, causes the processor to perform the method of the first aspect or any possible implementation of the first aspect.

In an eighth aspect, a system for controlling a transmission rate is provided that includes a processor, a memory, and a communication interface. The processor is coupled to the memory and the communication interface. The memory is for storing instructions, the processor is for executing the instructions, and the communication interface is for communicating with other network elements under control of the processor. The processor, when executing the instructions stored by the memory, causes the processor to perform the second aspect or the method of any possible implementation of the second aspect.

In a ninth aspect, a computer storage medium is provided, having program code stored therein for instructing execution of instructions of the method of the first aspect or any of the possible implementations of the first aspect.

A tenth aspect provides a computer storage medium having program code stored therein for instructing execution of instructions of a method in the second aspect or any of the possible implementations of the second aspect.

Based on the technical scheme, a first UE-AMBR of the UE and a first Session-AMBR set which is used for activating the Session-AMBR and corresponds to all PDU connections including the UE are obtained through a first PCF, and a second UE-AMRB is determined according to the first UE-AMBR and the first Session-AMBR set, so that the first PCF can determine the second UE-AMBR according to the first UE-AMBR configured for the UE in advance and all current Session-AMBRs, and further the data transmission rate of the UE is limited through the second UE-AMBR, and the efficiency of system data transmission is improved. .

Drawings

Fig. 1 is a schematic diagram of a system for controlling a transmission rate according to an embodiment of the present application;

FIG. 2 is an architectural diagram of a 5G system;

fig. 3 is a schematic structural diagram of a system for controlling a transmission rate according to an embodiment of the present application;

FIG. 4 is a schematic flow chart diagram of a method of controlling a transmission rate of one embodiment of the present application;

FIG. 5 is a schematic flow chart diagram of a method of controlling a transmission rate of another embodiment of the present application;

FIG. 6 is a schematic flow chart diagram of a method of controlling a transmission rate according to another embodiment of the present application;

FIG. 7 is a schematic flow chart diagram of a method of controlling a transmission rate according to another embodiment of the present application;

FIG. 8 is a schematic block diagram of a PCF according to another embodiment of the present application;

fig. 9 is a schematic block diagram of an AMF according to another embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present invention are divided according to access systems, and can be applied to various communication systems, for example: global System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), Time Division Duplex (TDD), Universal Mobile Telecommunications System (UMTS), Wireless cellular network, and 5G systems, etc.

It should also be understood that, in the embodiment of the present invention, a User Equipment (UE) may be referred to as a Terminal (Terminal), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), and the like, the User Equipment may communicate with one or more core networks via a Radio Access Network (RAN), and the UE may be referred to as an Access Terminal, a Terminal device, a subscriber unit, a subscriber Station, a Mobile Station, a remote Terminal, a Mobile device, a User Terminal, a wireless communication device, a User agent, or a User Equipment. The UE may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computer device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, and so on.

Fig. 1 is a diagram illustrating a system 100 for controlling a transmission rate according to an embodiment of the present application. As shown in fig. 1, the system 100 may include: a first Policy Control Function (PCF) 110. The first PCF 110 may be configured to:

acquiring a first user equipment aggregation maximum bit rate UE-AMBR of user equipment UE, connecting a first Session aggregation maximum bit rate Session-AMBR set corresponding to a packet data unit PDU on the UE, determining a second UE-AMRB according to the first UE-AMBR and the first Session-AMBR set, and sending the second UE-AMBR to a radio access point RAN, wherein each Session-AMBR in the first Session-AMBR set is connected with a corresponding activation Session-AMBR for each PDU of the UE.

Optionally, the first PCF 110 may be further configured to send a subscription message to a User Data Repository (UDR), where the subscription message is used to notify the first PCF when a Session-AMBR in a first Session-AMBR set of the UDR changes, and receive a subscription notification message sent by the UDR, where the subscription notification message carries the first Session-AMBR set.

Optionally, the system 100 may further include a second PCF 120, where the second PCF 120 is configured to receive policy request information, where the policy request information is used to request policy information for connection of a first PDU, obtain, according to the policy request message, a Session-AMBR set to which the first PDU is connected and signed from the UDR, determine that the first PDU in the signed Session-AMBR set is connected to a corresponding first active Session-AMBR, and send the first active Session-AMBR to the UDR, where the signed Session-AMBR set includes at least one Session-AMBR corresponding to the first PDU connection;

the first PCF 110 is configured to receive a first Session-AMBR set sent by the UDR, where the first Session-AMBR set is generated by updating, by the UDR, a second Session-AMBR set according to the first activation Session-AMBR, and each Session-AMBR in the second Session-AMBR set connects a corresponding activation Session-AMBR to each PDU of the UE before the first activation Session-AMBR is received.

Optionally, the system 100 may further include a second PCF 120, where the second PCF 120 is configured to receive policy request information, where the policy request information is used to request policy information for the first PDU connection, obtain a signed Session-AMBR set for the first PDU connection from a user database UDR according to the policy request information, and determine a first activation Session-AMBR corresponding to the first PDU connection in the signed Session-AMBR set, where the signed Session-AMBR set includes at least one Session-AMBR corresponding to the first PDU connection.

The first PCF 110 is further configured to receive the first active Session-AMBR sent by the second PCF, and update a second Session-AMBR set through the first active Session-AMBR to generate the first Session-AMBR set, where each Session-AMBR in the second Session-AMBR set connects a corresponding active Session-AMBR to each PDU of the UE before receiving the first active Session-AMBR.

Optionally, the first PCF 110 is further configured to receive a context session establishment request sent by an Access Mobility Management Function (AMF), where the context session establishment request carries an identifier of the UE, and obtain the first UE-AMBR from the UDR according to the identifier of the UE.

Optionally, the first PCF 110 is further configured to determine a Session-AMBR summation value of the first Session-AMBR set according to the first Session-AMBR set, and determine a minimum value of the first UE-AMBR and the Session-AMBR summation value of the first Session-AMBR set as the second UE-AMBR.

Fig. 2 is a schematic diagram showing an architecture of a 5G system, which is a specific example of the system shown in fig. 1. As shown in fig. 2, the 5G system mainly includes an Authentication Server Function (AUSF), Unified Data Management (UDM), AMF, SMF, PCF, Application Function (AF), Data Network (DN), User Plane Function (UPF), RAN, UE, Diameter Routing Agent (DRA), and UDR. The DRA and UDR are not shown in fig. 2, the DRA being primarily disposed before the PCF, and each device for connecting to the PCF may pass through the DRA. And the UDR is a data storage unit and is responsible for storing the signing data. The PCF in the 5G system shown in fig. 2 may correspond to the first PCF 110 shown in fig. 1 or the second PCF 120 shown in fig. 1. The SMF is responsible for session management and the AMF is responsible for access and mobility management.

Session-AMBR is the maximum aggregate bit rate of a PDU Session for a UE, which is a connection between the UE and a packet Data Network, and is characterized by (IP address of UE, Data Network Name, DNN)) Data pairs for an Internet Protocol (IP) type.

In addition, in a 5G system, there is also a scenario of multiple PCFs, with different PCFs having different number segments, different IP addresses, or different DNNs. If there are multiple PCFs deployed, additional functional entities are needed to complete the selection of the PCF, and the selection is implemented in 5G by a DRA mechanism. When receiving the UE context (context) of the AMF, the DRA selects a PCF for the UE according to the UE identity, or if the PCF is not differentiated according to number segments, the DRA may select a PCF for the UE according to other rules, for example, load sharing.

In a 5G system, a Common (Common) PCF, which is responsible for UE-level policies, may be included among the PCFs. Common PCF may be deployed within each slice in the network to be responsible for PDU session level or traffic data flow level policies. The UE level policy comprises a mobility policy, an access network policy and a UE-AMBR, wherein the mobility policy can be that the UE is not allowed to access the network in a certain area, and the access network policy can be that the UE is only allowed to access through LTE. The PDU Session level policy is a policy of one PDU Session, such as Session-AMBR, and the policy of the Service data flow level is a policy for a certain data flow, such as Quality of Service (Qos) policy for a certain IP five tuple.

It should be noted that, in the embodiment of the present application, the first PCF 110 and the second PCF 120 are presented in the form of functional units. An "element" may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality.

As shown in fig. 3, the first PCF and the second PCF illustrated in fig. 1, or the PCF in fig. 2, may be implemented in the form of a computer device (or system) in fig. 3.

Fig. 3 shows a schematic diagram of a computer device (or a system for controlling transmission rate) 300 provided by the embodiment of the present application. As shown in fig. 3 in particular, the system 300 includes at least one Processor 302 (e.g., a general purpose Processor (CPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), etc., with computing and processing capabilities), where the Processor 302 is configured to manage and schedule modules and devices within the system 300. The system 300 also includes at least one transceiver 305 (receiver/transmitter), a memory 306. The various components of system 300 communicate with each other, passing control and/or data signals, through internal connection paths.

The methods disclosed in the embodiments of the present application described above may be applied to the processor 302 or used to execute an executable module, such as a computer program, stored in the memory 306. Memory 306 may comprise a high-speed Random Access Memory (RAM) or may further comprise a non-volatile Memory (non-volatile Memory), which may comprise both rom and RAM and may provide the necessary signaling or data, programs, etc. to the processor. The portion of memory may also include non-volatile row random access memory (NVRAM). The communication connection with at least one other network element is realized by at least one transceiver 305 (which may be wired or wireless).

In one embodiment, the computer device 300 may include a plurality of processors, and each processor may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular implementations, computer device 300 may also include a transceiver 305, as an embodiment. The transceiver 305 is in communication with the processor 302 and may display information in a variety of ways. For example, the transceiver 305 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The transceiver 305 is in communication with the processor 302 and may accept user input in a variety of ways. For example, the input device may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The computer device 300 may be a general purpose computer device or a special purpose computer device. In a specific implementation, the computer device 300 may be a desktop computer, a laptop computer, a web server, a Personal Digital Assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device, or a device with a similar structure as in fig. 3. The embodiment of the present application does not limit the type of the computer apparatus 300.

Embodiments of the present application also provide a computer storage medium that can store program instructions for instructing any one of the methods described above.

Alternatively, the storage medium may be specifically the memory 306.

Illustratively, the first PCF or the second PCF of fig. 1 has one or more software modules stored in memory. The first PCF or the second PCF may implement the software modules via the processor and program code in the memory to implement the data transmission rate control.

Illustratively, the PCF of fig. 2 has one or more software modules stored in memory. The PCF may implement the data transmission rate control by a processor and program code in memory as software modules.

The method for controlling the data transmission rate according to the embodiment of the present invention is described below with reference to the flowchart by taking the system shown in fig. 2 as an example.

Fig. 4 shows a schematic flow chart of a method of controlling a transmission rate according to an embodiment of the present application. The embodiment is applied to a scenario that the UE does not initiate the context session flow.

401, UE sends a PDU session establishment request to SMF, where the PDU session establishment request carries UE identifier and DNN information.

The SMF allocates an IP address to the UE 402 and establishes a PDU-CAN session with the PCF, which is used to request charging and control policies.

Here the PCF may correspond to the second PCF 120 of the embodiment shown in fig. 1.

And 403, the PCF acquires a corresponding second Session-AMBR set according to the first PDU connection.

Optionally, the UDR may send the first UE-AMBR with the second Session-AMBR set when sending the second Session-AMBR set to the PCF.

And 404, the PCF receives the plurality of second Session-AMBRs, selects one of the second Session-AMBRs as an activated Session-AMBR among the plurality of second Session-AMBRs according to the position of the UE, the identity of the UE, the current time and the like, and represents the selected second Session-AMBR as the first activated Session-AMBR.

The PCF 405 writes the active Session-AMBR, i.e. the first active Session-AMBR, into the UDR.

406, the UDR sends the first Session-AMBR set to the PCF.

Alternatively, if the PCF stores the first Session-AMBR set, after step 404, the PCF updates the first Session-AMBR set with the first active Session-AMBR, i.e. without performing steps 405 and 406. At this time, the UE-MBR may be carried by the second Session-AMBR set, which is not limited in this application.

Optionally, the UDR may send the first UE-AMBR with the first Session-AMBR set when sending the first Session-AMBR set to the PCF.

It should be understood that the first Session-AMBR set may be directly sent or may be carried by a message, for example, the first PCF may acquire a first message carrying the first Session-AMBR set and the first UE-AMBR, and the first message may be dedicated to carrying the first Session-AMBR set or may have other functions. This is not limited in this application.

It should be noted that this embodiment may be applied to a scenario in which the UE does not need to establish the context session connection, that is, the first UE-AMBR does not need to be acquired through the context session connection, so that system power consumption is saved.

And 407, the PCF calculates a second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set.

The PCF may obtain the first UE-AMBR according to step 403 and may also obtain the first UE-AMBR according to step 406.

The PCF sends 408 the second UE-AMBR to the RAN.

Alternatively, the PCF may send the second UE-AMBR to the RAN via the SMF, or via the SMF and the AMF.

It should be understood that, in the embodiments of the present application, related features, functions, and the like are corresponding to the description of the embodiment described in fig. 6, and are not described herein again for brevity.

Therefore, in the method for controlling the transmission rate according to the embodiment of the present application, the PCF may determine the second UE-AMBR according to the first UE-AMBR configured for the UE in advance and the activated Session-AMBR corresponding to all PDU connections supported by the UE, and further limit the data transmission rate of the UE by the second UE-AMBR, thereby improving the efficiency of system data transmission. Fig. 5 shows a schematic flow chart of a method of controlling a transmission rate of another embodiment of the present application. As shown in fig. 5, the meaning of various terms in the present embodiment is the same as that of the foregoing embodiments.

501, the UE sends an attach request to the AMF, where the attach request carries an identity of the UE.

The UE may forward the attach request to the AMF through the RAN, or may directly send the attach request, which is not limited in this application.

502, after receiving the attach request sent by the UE, the AFM sends a context session establishment request of the UE to the first PCF, which is used to request mobility and an access network selection policy. Accordingly, the first PCF receives the context session establishment request.

The context session establishment request also carries an identity of the UE, for example, the identity of the first UE corresponds to the first UE. When a plurality of PCFs exist in the system, the DRA receives the UE context session establishment request, and may select a suitable PCF for the first UE according to the identifier of the first UE carried in the UE context session establishment request. Specifically, if the PCF is differentiated according to number segments or administrative domains, the DRA may select the PCF for the UE according to the identity of the UE. If PCFs are not distinguished according to number segments or management domains, the DRA can select PCFs according to preset rules, for example, the DRA selects PCFs with lighter loads according to load sharing of the PCFs, and therefore processing efficiency is improved.

503, the first PCF acquires the first UE-AMBR.

And the UDR is a data storage unit and is responsible for storing subscription information, and the subscription information comprises different UE identifications and UE-AMBR corresponding to each UE identification. The first PCF may obtain a corresponding first UE-AMBR from the UDR via the database access interface based on the identity of the UE.

In addition, the UDR may also write the corresponding relationship between the UE and the first PCF in the UDR, and the specific UDR storage format may be [ UE identity, first PCF identity ].

It should be understood that the UDR may be a stand-alone device, may be integrated on any one of the PCFs, and may also be integrated with other devices, which is not limited in this application.

504, after obtaining the first UE-AMBR, the first PCF may send a UE context session establishment response message to the AMF, where the UE context session establishment response message may carry the first UE-AMBR. Accordingly, the AMF receives the UE context session establishment response message sent by the first PCF.

It should be understood that, when the first PCF sends the UE context session establishment response message to the AMF, the UE context session establishment response message may also be sent to the DRA first, and forwarded to the AMF through the DRA.

505, the UE sends a PDU session establishment request to the SMF, where the PDU session establishment request carries an identifier of the UE and Data Network Name (DNN) information. Accordingly, the SMF receives a PDU session setup request sent by the UE.

The SMF allocates 506 an IP address to the UE and sends a policy request message to the second PCF, the policy request message requesting policy information for the first PDU connection, the PDU connection being a connection between the UE and the packet data network. Accordingly, the second PCF receives the policy request message sent by the SMF.

Optionally, the policy request message may be a Packet Data Network Connectivity Access Network (PDU-CAN) connection request, or may be an event report message.

Specifically, if the UE sends a PDU connection establishment request to the SMF, and the SMF allocates an IP address to the UE, the SMF sends a PDU-CAN connection request to the second PCF via the DRA, where the PDU-CAN connection request is used to request policy information for connection of the first PDU. The PDU-CAN connection request carries the identification of the UE, the IP address of the UE and the DNN information of the UE, and the DRA selects the PCF for the PDU-CAN session according to the identification of the UE, the IP address of the UE and the DNN. The present embodiment may represent the selected PCF as the second PCF.

If the policy request message is an event report message, the event report message may include a location of the UE, a type change of an access network, and the like.

The policy request message may carry an IP address and a DNN, or a UE location and a DNN, or a session use time and a DNN of the UE, or a DNN and a time of the second PCF, or an identity of the UE and a DNN, or a message identity and a DNN, etc.

Optionally, the first PCF selected by the DRA according to the context session request and the second PCF selected by the DRA according to the PDU session connection establishment request may be the same PCF.

507, the second PCF acquires a corresponding second Session-AMBR set according to the first PDU connection.

A second Session-AMBR set corresponding to each PDU connection is stored in the UDR, the second Session-AMBR set comprises a plurality of Session-AMBRs, the Session-AMBRs are respectively corresponding Session-AMBRs of a PDU connection at different time, different UE positions or UE identifications, and the first Session-AMBR set comprises an activation Session-AMBR corresponding to each PDU connection, and the activation Session-AMBR is a Session-AMBR selected from the plurality of Session-AMBRs. The second PCF may query a second Session-AMBR corresponding to the UDR according to the DNN included in the information of the first PDU connection, and obtain the second Session-AMBR through the database query interface. The storage of the Session-AMBR in the UDR may be in the form of (DNN, Session-AMBR), and the same DNN may correspond to a plurality of second Session-AMBR.

It should be understood that the correspondence of DNN to Session-AMBR belongs to subscription information of the UE.

It is also understood that the first PDU connection may be a data flow to which the first PDU connection corresponds.

And 508, the second PCF receives the plurality of Session-AMBRs, selects one of the Session-AMBRs as an activated Session-AMBR among the plurality of Session-AMBRs according to the position of the UE, the identity of the UE, the current time and the like, and represents the selected Session-AMBR as a first activated Session-AMBR.

Specifically, the second PCF may select one Session-AMBR from the plurality of Session-AMBRs as the first activation Session-AMBR according to any set of information carried in the policy request message.

It should be appreciated that after the second PCF determines the first active Session-AMBR, the first active Session-AMBR may be sent to the SMF for use in responding to the PDU-CAN connection request.

509, the second PCF writes the first active Session-AMBR into the UDR.

Specifically, if the second PCF selects the Session-AMBR according to the identity of the UE, the storage form in the UDR may be represented as (identity of the UE, (identity of the first PDU connection, Session-AMBR of the first PDU connection)). And if the second activation Session-AMBR corresponding to the connection of the first PDU in the second Session-AMBR set is different from the first activation Session-AMBR, replacing the second activation Session-AMBR by the first activation Session-AMBR to generate a new Session-AMBR set, namely the first Session-AMBR set. And if the PDU connection corresponding activation Session-AMBR does not exist in the second Session-AMBR set, adding the first activation Session-AMBR into the second Session-AMBR set to generate a first Session-AMBR set. That is, the number of active Session-AMBRs in the Session-AMBR set is increased.

And 510, the UDR sends a first Session-AMBR set to the first PCF, wherein the first Session-AMBR set comprises activated Session-AMBRs corresponding to all PDU connections supported by the UE.

And when the activation Session-AMBR in the second Session-AMBR set changes, namely the UDR receives the first activation Session-AMBR, the second Session-AMBR set is updated by the first activation Session-AMBR to generate a first Session-AMBR set, and the first Session-AMBR set is sent to the first PCF.

It should be appreciated that the UDR may be sent to the Session-AMBR set in the form of a list.

Optionally, the first PCF sends a subscription request message to the UDR, the subscription request message being used to request the UDR to notify the first PCF when the stored Session-AMBR changes. Accordingly, the UDR receives the subscription request message. The sending of the subscription request message to the UDR by the first PCF may occur between step 504 and step 505, or may occur anywhere before step 510, which is not limited in this application.

Specifically, the subscription request may be an explicit subscription or an implicit subscription. For explicit subscription, the first PCF may carry the event type of the Session-AMBR in the subscription request, i.e., notify the first PCF when the Session-AMBR activation for which UE changes, which saves UDR power consumption. For implicit subscription, the first PCF may not carry the Session-AMBR in the subscription request, i.e. the UDR may default to notify the first PCF when the active Session-AMBR for all UEs changes, so that the first PCF can learn the change of the Session-AMBR for any UE.

For example, the first PCF may request the UDR to notify the first PCF when an active Session-AMBR in the second Session-AMBR set of the UE changes, that is, the first Session-AMBR set obtained by updating the second Session-AMBR set is sent to the first PCF.

Optionally, the system may also set in advance that the UDR notifies the first PCF when the Session-AMBR in the first Session-AMBR set in the UDR changes, that is, the first Session-AMBR set obtained by updating the second Session-AMBR set is sent to the first PCF, which is not limited in this embodiment of the present application.

It should be appreciated that the first PCF sends a subscription request to the UDR, which upon receiving the subscription request may reply with a subscription success message.

511, the first PCF determines a second UE-AMBR from the first UE-AMBR and the first Session-AMBR set.

Specifically, the first PCF performs summation operation on each Session-AMBR in the Session-AMBR set to obtain a Session-AMBR summation value, then compares the first UE-AMBR with the Session-AMBR summation value, and takes the minimum value of the two as the second UE-AMBR, that is, Min (first UE-AMBR, Σ Session-AMBR). Thus, the first PCF can determine a second UE-AMBR according to the first UE-AMBR configured for the UE in advance and all current Session-AMBRs, and further limit the data transmission rate of the UE through the second UE-AMBR.

It should be noted that, the second UE-AMBR may limit the uplink transmission rate, may also limit the downlink transmission rate, or may limit both the uplink transmission rate and the downlink transmission rate, which is not limited in this application.

The first PCF sends 512 the second UE-AMBR to the RAN.

Specifically, the first PCF may send the second UE-AMBR to the RAN via the SMF, and the RAN performs the execution of the UE-AMBR.

Optionally, the first PCF may also send the second UE-AMBR to the RAN via the SMF and the AMF, and the RAN performs the execution of the UE-AMBR.

Fig. 6 shows a schematic flow chart of a method of controlling a transmission rate of another embodiment of the present application. As shown in fig. 6, the meaning of various terms in the present embodiment is the same as that of the foregoing embodiments.

The first PCF in the embodiment of the present application may be a Common PCF in a scenario of a Common PCF, and the UDR may not select a PCF according to an identity of the UE, but uses the Common PCF in a unified manner, and the Common PCF stores a first Session-AMBR set.

It should be noted that there may be no DRA in a system including a Common PCF, and the selection of a PCF for a PDU connection may be implemented by other devices.

It should be understood that "Common PCF" is an abbreviation for PCF having this function, and the name of this PCF is not limited in the embodiments of the present application.

Steps 601-608 may be the same as steps 501-508 in the embodiment shown in fig. 5, and are not repeated here to avoid repetition.

609, the second PCF writes the activated Session-AMBR, i.e. the first activated Session-AMBR, into the first PCF.

Specifically, if the second PCF selects the Session-AMBR according to the identity of the UE, the storage form in the UDR may be represented as (identity of the UE, (identity of the first PDU connection, Session-AMBR of the first PDU connection)). And if the third Session-AMBR corresponding to the connection of the first PDU stored in the Session-AMBR set is different from the first Session-AMBR, replacing the third Session-AMBR by the first Session-AMBR, namely updating the Session-AMBR set.

Steps 610 to 611 may also be the same as steps 511 to 512 in the embodiment shown in fig. 5, and are not repeated herein to avoid repetition.

Optionally, in step 611, the first PCF may also send the second UE-AMBR to the RAN through the SMF and the AMF, and the RAN performs the execution of the UE-AMBR.

Since the Common PCF is not connected to the SMF, the Common PCF may forward the second UE-AMBR to the RAN via the AMF.

Therefore, in the method for controlling the transmission rate in the embodiment of the application, the first PCF acquires the first Session-AMBR corresponding to the connection between the first UE-AMBR of the UE and the first PDU, updates the stored second Session-AMBR set by the first Session-AMBR to obtain the first Session-AMBR set, and determines the second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set, so that the first PCF may determine the second UE-AMBR according to the first UE-AMBR pre-configured for the UE and all current Session-AMBR sets, and further limit the data transmission rate of the UE by the second UE-AMBR, thereby improving the efficiency of system data transmission. Fig. 7 shows a schematic flow chart of a method of controlling a transmission rate of another embodiment of the present application. As shown in figure 7 of the drawings,

steps 701 to 710 may be the same as steps 501 to 510 in the embodiment shown in fig. 5, and are not repeated here to avoid repetition.

711, the first PCF determines a Session-AMBR sum value for the first Session-AMBR set according to the first Session-AMBR set.

The first PCF sums the Session-AMBR value to the AMF 712.

713, the AFM calculates a second UE-AMBR, Min (first UE-AMBR, Σ Session-AMBR) based on the Session-AMBR sum and the first UE-AMBR obtained in step 704.

The first PCF sends 714 the second UE-AMBR to the RAN.

Therefore, in the method for controlling the transmission rate in the embodiment of the application, the AMF is used to obtain the sum of the Session-AMBR of the first Session-AMBR set of the activated Session-AMBR corresponding to the connection of the first UE-AMBR of the UE and all PDUs including the UE, and determine the second UE-AMBR according to the sum of the Session-AMBR of the first UE-AMBR set and the Session-AMBR of the first Session-AMBR set, so that the AMF can determine the second UE-AMBR according to the first UE-AMBR pre-configured for the UE and all current Session-AMBRs, and further limit the data transmission rate of the UE by the second UE-AMBR, thereby improving the efficiency of system data transmission.

Optionally, as an embodiment, DAR may also be used to perform the calculation of the second UE-AMBR. That is, after acquiring the first UE-AMBR and the first Session-AMBR set, the first PCF sends the first UE-AMBR and the first Session-AMBR set to the DRA, the DRA calculates the Σ Session-AMBR, and Min (the first UE-AMBR, the Σ Session-AMBR) obtains the second UE-AMBR.

Alternatively, the first PCF may also calculate a Session-AMBR sum value for all active Session-AMBRs in the first Session-AMBR set and send the Session-AMBR sum value to the DAR, which calculates Min (first UE-AMBR, Σ Session-AMBR).

Optionally, as another embodiment, the SMF may also be used to perform the calculation of the second UE-AMBR. After the first PCF obtains the first UE-AMBR and the first Session-AMBR set, the first PCF sends the first UE-AMBR and the first Session-AMBR set to the SMF, and the SMF calculates the sigma Session-AMBR and Min (the first UE-AMBR, the sigma Session-AMBR) obtains the second UE-AMBR.

Optionally, as another embodiment, the first PCF or DRA may also calculate a Session-AMBR sum value of all active Session-AMBRs in the first Session-AMBR set, send the sum value to the SMF, and calculate Min by the SMF (first UE-AMBR, Σ Session-AMBR).

Alternatively, as another embodiment, the AMF may not identify the Session-AMBR, but may identify the Session-AMBR sum. Thus, the DRA or SMF may also calculate a Session-AMBR sum value for all active Session-AMBRs in the first Session-AMBR set and send the Session-AMBR sum value to the AMF, which calculates Min (first UE-AMBR, Σ Session-AMBR).

Therefore, in the method for controlling transmission rate in the embodiment of the present application, the AMF obtains a Session-AMBR sum value of a first Session-AMBR set in which a first UE-AMBR of the UE and all PDUs including the UE are connected to a corresponding activated Session-AMBR, and determines a second UE-AMBR according to the first UE-AMBR and the Session-AMBR sum value of the first Session-AMBR set, where the Session-AMBR sum value of the first Session-AMBR set may be determined by the first UE, PCF, or SMF, so that the AMF may determine the second UE-AMBR according to the first UE-AMBR pre-configured for the UE and all current Session-AMBRs, and further limit the data transmission rate of the UE by the second UE-AMBR, thereby improving the efficiency of system data transmission.

Fig. 8 shows a schematic block diagram of a PCF 800 controlling transmission rates according to an embodiment of the application. As shown in fig. 8, the PCF 800 includes:

a processing module 810, configured to obtain a first UE-AMBR of UEs;

the processing module 810 is further configured to obtain a first Session aggregation maximum bit rate Session-AMBR set corresponding to connection of a packet data unit PDU on the UE, where each Session-AMBR in the first Session-AMBR set is connected to a corresponding active Session-AMBR for each PDU of the UE;

the processing module 810 is further configured to determine a second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set;

a sending module 820 configured to send the second UE-AMBR to the radio access point RAN.

PCF 800 of an embodiment of the present application may correspond to the first PCF of the method embodiments illustrated in fig. 4, 5, 6, and 7, described above. And each module or unit in the PCF 800 is configured to perform the corresponding process executed by the first PCF in the above-described method embodiment. For brevity, no further description is provided herein.

It should be appreciated that PCF 800 is presented in the form of a functional unit in this embodiment. An "element" may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality. In a simple embodiment, one skilled in the art will recognize that PCF 800 may take the form shown in FIG. 3. The processing module 810 may be implemented by the processor 302 and the memory 306 shown in fig. 3. The transmitting module 820 may be implemented by the transceiver 302 shown in fig. 3. In particular, the processor is implemented by executing a computer program stored in the memory.

Fig. 9 shows a schematic block diagram of an AMF 900 of an embodiment of the present application. As shown in fig. 9, the AMF 900 includes:

a processing module 910, configured to obtain a first UE-AMBR of UEs;

a receiving module 920, configured to receive a Session-AMBR summation value of a first Session aggregation maximum bit rate Session-AMBR set sent by a first policy control function PCF, where each Session-AMBR in the first Session-AMBR set connects a corresponding activated Session-AMBR to each packet data unit PDU of the UE;

the processing module 910 is further configured to determine a second UE-ambb according to the first UE-AMBR and a Session-AMBR sum of the first Session-AMBR set; a sending module 920, configured to send the second UE-AMBR to a radio access point RAN;

a sending module 930 configured to send the second UE-AMBR to the radio access point RAN.

The AMF 900 of the present embodiment may correspond to the corresponding AMF of the method embodiments shown in fig. 4, 5, 6, and 7 described above. And each module or unit in the AMF 900 is used to perform the corresponding flow executed by the AMF in the above method embodiments. For brevity, no further description is provided herein.

It should be understood that in the present embodiment, the AMF 900 is presented in the form of a functional unit. An "element" may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality. In a simple embodiment, one skilled in the art will recognize that AMF 900 may take the form shown in FIG. 3. The processing module 910 may be implemented by the processor 302 and the memory 306 shown in fig. 3. The receiving module 920 and the transmitting module 930 may be implemented by the transceiver 302 shown in fig. 3. In particular, the processor is implemented by executing a computer program stored in the memory. Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for controlling a transmission rate, comprising:

a first policy control function PCF acquires a first user equipment aggregation maximum bit rate UE-AMBR of user equipment UE;

a second PCF receives strategy request information, wherein the strategy request information is used for requesting the strategy information of the PDU connection of a first packet data unit;

the second PCF acquires a signed Session aggregation maximum bit rate Session-AMBR set connected with the first PDU from a user database UDR according to the strategy request information, wherein the signed Session-AMBR set comprises at least one Session-AMBR corresponding to the first PDU connection;

the second PCF determines that the first PDU in the signed Session-AMBR set is connected with a corresponding first activation Session-AMBR;

the first PCF receives the first activation Session-AMBR sent by the second PCF;

the first PCF updates a second Session-AMBR set through the first activation Session-AMBR to generate a first Session-AMBR set corresponding to PDU connection on the UE, wherein each Session-AMBR in the second Session-AMBR set connects a corresponding activation Session-AMBR for each PDU of the UE before the first activation Session-AMBR is received, and each Session-AMBR in the first Session-AMBR set connects a corresponding activation Session-AMBR for each PDU of the UE;

the first PCF determines a second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set;

the first PCF sends the second UE-AMBR to a radio access point RAN;

the first PCF determines a second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set, and the method comprises the following steps:

the first PCF determines a Session-AMBR sum value of the first Session-AMBR set according to the first Session-AMBR set;

the first PCF determines a minimum value of a sum value of the first UE-AMBR and the Session-AMBR of the first Session-AMBR set as the second UE-AMBR.

2. The method of claim 1, further comprising:

the first PCF sends a subscription message to the UDR, wherein the subscription message is used for indicating that the first PCF is informed when a Session-AMBR in a first Session-AMBR set of the UDR changes;

wherein the acquiring, by the first PCF, the first Session-AMBR set comprises:

and the first PCF receives a subscription notification message sent by the UDR, wherein the subscription notification message carries the first Session-AMBR set.

3. The method of claim 1 or 2, wherein the first PCF receiving the first active Session-AMBR sent by the second PCF comprises:

the second PCF sends the first active Session-AMBR to the UDR;

the first PCF receives a first Session-AMBR set from the UDR.

4. The method according to claim 1 or 2, characterized in that the method further comprises:

the first PCF receives a context session establishment request sent by an access mobility management function (AMF), wherein the context session establishment request carries the identifier of the UE;

wherein the acquiring, by the first PCF, a first UE-AMBR of the UE includes:

and the first PCF acquires the first UE-AMBR from the UDR according to the identity of the UE.

5. A system for controlling transmission rates, comprising:

the system comprises a first policy control function PCF, a first policy control function AMBR and a second policy control function PCF, wherein the first policy control function PCF is used for acquiring a first user equipment aggregation maximum bit rate UE-AMBR of user equipment UE;

the second PCF is used for receiving policy request information, acquiring a Session aggregation maximum bit rate Session-AMBR set signed by first Packet Data Unit (PDU) connection from a User Database (UDR) according to the policy request information, and determining a first activation Session-AMBR corresponding to the first PDU connection in the signed Session-AMBR set, wherein the policy request information is used for requesting the policy information connected by the first PDU, and the signed Session-AMBR set comprises at least one Session-AMBR corresponding to the first PDU connection;

the first PCF is further configured to receive the first active Session-AMBR sent by the second PCF, and update a second Session-AMBR set through the first active Session-AMBR to generate a first Session-AMBR set corresponding to the PDU connection on the UE, where each Session-AMBR in the second Session-AMBR set connects a corresponding active Session-AMBR for each PDU of the UE before receiving the first active Session-AMBR, and each Session-AMBR in the first Session-AMBR set connects a corresponding active Session-AMBR for each PDU of the UEs;

the first PCF is further used for determining a second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set and sending the second UE-AMBR to a radio access point (RAN);

the first PCF is further configured to determine, according to the first Session-AMBR set, a Session-AMBR sum value of the first Session-AMBR set, and determine, as the second UE-AMBR, a minimum value of the Session-AMBR sum values of the first UE-AMBR and the first Session-AMBR set.

6. The system of claim 5, wherein the first PCF is further configured to send a subscribe message to a user database, UDR, the subscribe message indicating to notify the first PCF when a Session-AMBR in a first Session-AMBR set of the UDR changes;

and the first PCF is further configured to receive a subscription notification message sent by the UDR, where the subscription notification message carries the first Session-AMBR set.

7. The system of claim 5 or 6, wherein the first PCF receiving the first active Session-AMBR sent by the second PCF comprises:

the second PCF is further configured to send the first active Session-AMBR to the UDR;

and the first PCF is also used for receiving a first Session-AMBR set sent by the UDR.

8. The system according to claim 5 or 6, wherein said first PCF is further configured to receive a context session establishment request sent by an access mobility management function, AMF, where the context session establishment request carries an identifier of the UE, and obtain the first UE-AMBR from the UDR according to the identifier of the UE.

9. A policy control function PCF comprising:

the processing module is used for acquiring a first user equipment aggregation maximum bit rate UE-AMBR of user equipment UE;

the processing module is further configured to acquire a first activation Session-AMBR;

the processing module is further configured to update a second Session-AMBR set by using the first activation Session-AMBR to generate a first Session-AMBR set corresponding to PDU connection on the UE, where each Session-AMBR in the second Session-AMBR set connects a corresponding activation Session-AMBR for each packet data unit PDU of the UE before the first activation Session-AMBR is received, and each Session-AMBR in the first Session-AMBR set connects a corresponding activation Session-AMBR for each PDU of the UE;

the processing module is further configured to determine a second UE-AMBR according to the first UE-AMBR and the first Session-AMBR set;

a sending module, configured to send the second UE-AMBR to a radio access point RAN;

the processing module is further configured to determine a second UE-AMBR from the first UE-AMBR and the first Session-AMBR set, including:

the processing module is specifically configured to determine a Session-AMBR sum value of the first Session-AMBR set according to the first Session-AMBR set;

determining a minimum value of a Session-AMBR sum value of the first UE-AMBR and the first Session-AMBR set as the second UE-AMBR.

10. The PCF of claim 9 wherein said sending module is further configured to send a subscribe message to the UDR, said subscribe message indicating to notify said PCF when a Session-AMBR in said first Session-AMBR set of said UDR changes;

the PCF further comprises a receiving module, wherein the receiving module is configured to receive a subscription notification message sent by the UDR, and the subscription notification message carries the first Session-AMBR set.

11. The PCF of claim 9 or 10 wherein said PCF further comprises a receiving module, said receiving module is configured to receive a context session establishment request sent by an access mobility management function AMF, said context session establishment request carrying an identifier of said UE;

the processing module is configured to acquire a first UE-AMBR of the UE and includes:

the processing module is specifically configured to acquire the first UE-AMBR from the UDR according to the identifier of the UE.