WO2023103729A1 - 拥塞控制方法、系统、电子设备和存储介质 - Google Patents

拥塞控制方法、系统、电子设备和存储介质 Download PDF

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Publication number
WO2023103729A1
WO2023103729A1 PCT/CN2022/132385 CN2022132385W WO2023103729A1 WO 2023103729 A1 WO2023103729 A1 WO 2023103729A1 CN 2022132385 W CN2022132385 W CN 2022132385W WO 2023103729 A1 WO2023103729 A1 WO 2023103729A1
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Prior art keywords
rate
rtt value
rtt
congestion
information
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PCT/CN2022/132385
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English (en)
French (fr)
Inventor
孔振岗
曹义林
王斌
徐林
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中兴通讯股份有限公司
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Publication of WO2023103729A1 publication Critical patent/WO2023103729A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/28—Flow control; Congestion control in relation to timing considerations
    • H04L47/283—Flow control; Congestion control in relation to timing considerations in response to processing delays, e.g. caused by jitter or round trip time [RTT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing

Definitions

  • the embodiments of the present application relate to the technical field of wireless communication, and in particular, to a congestion control method, system, electronic device, and storage medium.
  • the 3GPP standard introduced the RAN Congestion Awareness Function (RCAF for short) in R13 and the Network Data Analytics Function (NWDAF for short) in R15, both of which are It provides the radio access network (Radio Access Network, RAN) user plane congestion information to the Policy Control Function (PCF for short) or the Policy and Charging Rule Function (PCRF for short), so that the PCF Or the PCRF considers the RAN user plane congestion status as a factor for determining the policy.
  • R13 Radio Access Network, RAN
  • NWDAF Network Data Analytics Function
  • PCF Policy Control Function
  • PCRF Policy and Charging Rule Function
  • the main purpose of the embodiments of the present application is to provide a congestion control method, system, electronic device, and storage medium. It is intended that the congestion control method can be implemented and applied in a cross-manufacturer equipment networking environment, and has good versatility.
  • an embodiment of the present application provides a congestion control method, including: receiving user plane data of a user equipment UE and a remote authentication dial-up user service Radius message, wherein the Radius message includes UE access type; according to the The user plane data is used to measure the round-trip delay RTT of the UE to obtain the RTT value of the UE; when the RTT value meets the preset congestion threshold, a UE limit is generated according to the RTT value and the UE access type A rate limit request, wherein the UE rate limit request includes rate limit information; the UE rate limit request is sent to a policy control function PCF or a policy and charging control function PCRF through a public interface for the PCF or the PCRF Find the speed limit rate corresponding to the speed limit information in the preset correspondence table between speed limit information and speed limit rate, and perform speed limit on the UE according to the speed limit rate, and complete congestion on the UE control.
  • the embodiment of the present application further provides a congestion control system, including: a receiving module, configured to receive user plane data of the user equipment UE and a Radius message of the remote authentication dial-up user service, wherein the Radius message includes UE access input type; a measurement module, configured to perform round-trip delay RTT measurement on the UE according to the user plane data, and obtain an RTT value of the UE; a generation module, configured to when the RTT value satisfies a preset congestion threshold, Generate a UE speed limit request according to the RTT value and the UE access type, where the UE speed limit request includes speed limit information; a control module, configured to send the UE speed limit request to a policy control through a public interface
  • the function PCF or the policy and charging control function PCRF is used for the PCF or the PCRF to search for the rate limit rate corresponding to the rate limit information in the preset rate limit information and rate limit rate correspondence table, and according to The rate limiting rate limits the rate of the UE
  • an embodiment of the present application further provides an electronic device, including: at least one processor; and a memory connected to the at least one processor in communication; wherein, the memory stores information that can be used by the at least one processor An instruction executed by a processor, the instruction is executed by the at least one processor, so that the at least one processor can execute the above congestion control method.
  • an embodiment of the present application further provides a computer-readable storage medium storing a computer program, and implementing the above congestion control method when the computer program is executed by a processor.
  • FIG. 1 is a schematic structural diagram of an application environment in an embodiment of the present application
  • FIG. 2 is a flowchart of a congestion control method provided in an embodiment of the present application
  • FIG. 3 is a flowchart of a congestion control method provided in an embodiment of the present application.
  • FIG. 4 is a flowchart of a congestion control method provided in an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a congestion control system provided in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
  • FIG. 1 The structural diagram of the application environment of the present application is shown in Figure 1, including user plane network elements, control plane network elements, policy control network elements, user equipment, radio access network and congestion control system, wherein the user plane network elements can be User plane public data gateway (Public Data Network Gate Way, referred to as PGW-U) or user plane function (User Plane Function, referred to as UPF), used for user plane data forwarding, QoS and policy enforcement, usage reporting, billing information reporting, etc.
  • PGW-U Public Data Network Gate Way
  • UPF User Plane Function
  • control plane network element can be the control plane public data gateway PGW-C or the session management function (Session Management Function, referred to as SMF), which is used to complete session management, UE IP address allocation and management, UPF selection, session policy control and other functions ;
  • SMF Session Management Function
  • the policy control network element is PCF/PCRF, which is used for access and mobility policy control, session policy control, and authorization of resource requests (Application Function, referred to as AF);
  • the congestion control system is the subject of this application, and the UE User plane data TCP packets perform RTT measurement and data packet loss rate measurement, judge whether congestion occurs according to the measurement value, and send a request to PCF/PCRF to limit the UE rate after congestion occurs.
  • An embodiment of the present application relates to a congestion control method, applied to the congestion control system shown in Figure 1, as shown in Figure 2, including:
  • Step 101 receiving user plane data of a user equipment UE and a Radius message of a remote authentication dial-up user service, wherein the Radius message includes a UE access type.
  • the user plane data received by the congestion control system is sent by the user plane network element PGW-U/UPF, and the user plane data is information such as ongoing services, browsing services, and user requirements of the user equipment; congestion
  • the remote authentication dial-up user service Radius message received by the control system is sent by the control plane network element.
  • the Radius message may include UE identifier, UE access type and UE location information, wherein the UE identifier refers to the IP address of the user equipment or other Information that can indicate the identity of the user equipment; UE access type refers to the wireless access information of the user equipment, UE location information can be Tracking Area Code (Tracking Area Code, referred to as TAC) or Location Area Code (Location Area Code, referred to as LAC) .
  • TAC Tracking Area Code
  • LAC Location Area Code
  • Step 102 Perform round-trip delay RTT measurement on the UE according to the user plane data, and obtain the RTT value of the UE.
  • the round-trip delay RTT measurement is performed on the user equipment according to the user plane data sent by the user plane network element.
  • This application uses the existing round-trip delay RTT measurement method to perform the round-trip delay RTT measurement on the user equipment, and obtains The RTT value of the user equipment.
  • Step 103 when the RTT value satisfies the preset congestion threshold, generate a UE speed limit request according to the RTT value and UE access type, wherein the UE speed limit request includes speed limit information.
  • the congestion control system stores a table of correspondence between UE access types and congestion thresholds, and different access types have different congestion thresholds; the congestion control system obtains the RTT value of the user equipment After that, firstly, the corresponding congestion threshold is obtained from the correspondence table based on the UE access type, and then it is judged whether the RTT value under the current access type meets the preset congestion threshold.
  • the congestion control system stores a congestion level table based on the RTT value range and UE access type, that is, the congestion control system can obtain user information based on the RTT value and the current access type of the user equipment.
  • the congestion level of the device; the congestion level, access type and speed limit rate correspondence table is stored in the congestion control system, and the congestion level, access type and speed limit rate correspondence table stores UE congestion level, UE access
  • the corresponding relationship between the type and the speed limit rate; the preset speed limit information and the speed limit rate correspondence table on the congestion control system, the speed limit information and the speed limit rate correspondence table stores the combination of information and the speed limit in the speed limit request
  • the corresponding relationship between rates, the specific style of the rate limit information in the rate limit request is determined by the specific protocol adopted, for example: the rate limit information in the rate limit request can include the MPS identifier and session resource reservation priority.
  • the congestion control system when the RTT value meets the preset threshold, obtains the UE congestion level of the UE from the congestion level table, and then according to the UE congestion level and UE access type According to the UE congestion rate, the MPS identifier and session resource reservation priority in the rate limit information can be obtained from the rate limit information and the rate limit rate correspondence table according to the UE congestion rate, and form a user equipment UE rate limit request; this application converts the rate limit rate of the user equipment into the form of MPS identifier and session resource reservation priority and sends it to PCF or PCRF to ensure that the congestion control system and PCF or PCRF can communicate accurately.
  • Step 104 Send the UE speed limit request to the policy control function PCF or the policy and charging control function PCRF through the public interface, so that the PCF or PCRF can search and limit the speed in the preset speed limit information and speed limit rate correspondence table The speed limit rate corresponding to the information, and the UE speed limit is performed according to the rate limit rate, and the congestion control for the UE is completed.
  • the public interface may be an Rx interface or an N5 interface, or other 5G standard interfaces
  • the congestion control system sends the speed limit request to the policy control function PCF or the policy and charging control function PCRF through the public interface, After the policy control function PCF or the policy and charging control function PCRF receives the rate limit request, it searches the rate limit information and rate limit rate correspondence table stored on the policy control function PCF or the policy and charging control function PCRF.
  • the speed limit information in the speed limit request corresponds to the speed limit rate, and initiates a policy update to the control plane network element PGW-C/SMF through other public interfaces (such as Gx interface or N7 interface), and carries the speed limit in the policy update message Rate information:
  • the control plane network element instructs the user plane network element PGW-U/UPF to execute the corresponding rate limit policy, and at the same time, the user plane network element PGW-U/UPF sends the control plane network element PGW-C /SMF returns the rate limit response, and the control plane network element PGW-C/SMF sends the rate limit response to PCF or PCRF.
  • the rate limit request also includes the UE identity of the user equipment, so that the policy control function PCF or the policy and charging control function PCRF obtains the UE subscription information of the user equipment according to the UE identity, and according to the UE identity of the user equipment
  • the subscription information determines the authorization of the UE rate limit request; when the authorization is passed, the policy control function PCF or policy and charging control function PCRF will send a message to the control plane network element PGW-C/SMF.
  • the speed limit information and speed limit rate correspondence table stored in the congestion control system and the speed limit information and speed limit rate correspondence table stored in the policy control function PCF or policy and charging control function PCRF It should be consistent, which is pre-configured before congestion control to ensure that the rate limit on the congestion control system side is consistent with the rate limit on the policy control function PCF or policy and charging control function PCRF side.
  • the user plane data of the user equipment UE and the remote authentication dial-up user service Radius message are received, wherein the Radius message includes the UE access type; according to the user Perform round-trip delay RTT measurement on the UE to obtain the RTT value of the UE; when the RTT value meets the preset congestion threshold, generate a UE speed limit request according to the RTT value and the UE access type , wherein the UE rate limit request includes rate limit information; the UE rate limit request is sent to a policy control function PCF or a policy and charging control function PCRF through a public interface, so that the PCF or the PCRF Look up the rate limit rate corresponding to the rate limit information in the established rate limit information and rate limit rate table, and perform rate limit on the UE according to the rate limit rate to complete congestion control on the UE.
  • the Radius message includes the UE access type
  • this application can be implemented and applied in a cross-manufacturer equipment networking environment, and has good versatility. It solves the problem that there is no commercially available RCAF or NWDAF in the prior art, and the congestion reporting and control implemented by some equipment manufacturers through private protocols is not universal and cannot be applied in cross-manufacturer equipment, which leads to the implementation of congestion reporting and control. Certain limitations of technical issues.
  • An embodiment of the present application relates to a congestion control method, which is applied to the congestion control system shown in Figure 1, as shown in Figure 3, including:
  • Step 201 receiving user plane data of a user equipment UE and a Radius message of a remote authentication dial-up user service, wherein the Radius message includes a UE identifier and a UE access type.
  • this step is substantially the same as step 101 in the embodiment of the present application, and details are not repeated here.
  • Step 202 Perform round-trip delay RTT measurement on the UE according to the user plane data, and obtain the RTT value of the UE.
  • this step is substantially the same as step 102 in the embodiment of the present application, and details are not repeated here.
  • Step 203 obtain the historical RTT value of the UE from the preset RTT information table according to the UE identifier and the UE access type.
  • an RTT information table is stored in the congestion control system, and the RTT information table stores the historical RTT values of the user equipment UE under each UE access type. After receiving the Radius message, it can The UE ID searches for all historical RTT values corresponding to the UE, and filters out the historical RTT value corresponding to the UE access type from all the historical RTT values corresponding to the UE ID.
  • Step 204 when the historical RTT value is obtained, update the RTT value according to the accumulated value of the product of the second weighting coefficient and the historical RTT value on the basis of the product of the first weighting coefficient and the RTT value.
  • the historical RTT value in the RTT information table needs to be replaced with the updated RTT value.
  • Step 205 when the historical RTT value is not acquired, update the RTT value according to the product of the third weighting coefficient and the RTT value.
  • the updated RTT value and UE access type need to be stored in the RTT information table according to the UE identifier.
  • Step 206 when the updated RTT value satisfies the preset congestion threshold, generate a UE speed limit request according to the updated RTT value and UE access type, wherein the UE speed limit request includes speed limit information.
  • this step is substantially the same as step 103 in the embodiment of the present application, and details are not repeated here.
  • the updated RTT value does not meet the congestion threshold
  • the historical RTT value in the RTT information table is deleted, and a speed limit release request is sent to the policy control function PCF or the policy and charging control function PCRF for The policy control function PCF or the policy and charging control function PCRF releases the rate limit for the UE according to the rate limit release request.
  • Step 207 Send the UE speed limit request to the policy control function PCF or policy and charging control function PCRF through the public interface, so that the PCF or PCRF can search and limit the speed in the preset correspondence table between speed limit information and speed limit rate The speed limit rate corresponding to the information, and the UE speed limit is performed according to the rate limit rate, and the congestion control for the UE is completed.
  • this step is substantially the same as step 104 in the embodiment of the present application, and details are not repeated here.
  • the current RTT value after obtaining the current RTT value of the user equipment, the current RTT value can be corrected in combination with the historical RTT value of the user equipment, so that the present application is not only Taking the current RTT value as the basis for judging the congestion of the user equipment, but judging the current congestion situation of the user equipment in combination with the historical congestion situation of the user equipment, can improve the accuracy of the congestion judgment of the user equipment in this application.
  • An embodiment of the present application relates to a congestion control method, applied to the congestion control system shown in Figure 1, as shown in Figure 4, including:
  • Step 301 receiving user plane data of a user equipment UE and a remote authentication dial-up user service Radius message, wherein the Radius message includes UE access type and UE location information.
  • this step is substantially the same as step 101 in the embodiment of the present application, and details are not repeated here.
  • Step 302 When the location information of the UE belongs to the preset control range, measure the round-trip delay RTT of the UE according to the user plane data, and obtain the RTT value of the UE.
  • the round-trip delay RTT measurement is performed on the user equipment, and the RTT value of the user equipment is obtained.
  • Step 303 when the UE location information does not belong to the preset control range, wait for the UE to report the Radius message again.
  • the congestion control system cannot perform congestion control on the user equipment, and can only wait for the user equipment to upload the Radius message again, and check The user equipment obtains whether the location information changes, and whether it belongs to the preset congestion control range.
  • Step 304 when the RTT value meets the preset congestion threshold, generate a UE speed limit request according to the RTT value and UE access type, wherein the UE speed limit request includes speed limit information.
  • this step is substantially the same as step 103 in the embodiment of the present application, and details are not repeated here.
  • Step 305 Send the UE speed limit request to the policy control function PCF or the policy and charging control function PCRF through the public interface, so that the PCF or PCRF can search and limit the speed in the preset correspondence table between speed limit information and speed limit rate The speed limit rate corresponding to the information, and the UE speed limit is performed according to the rate limit rate, and the congestion control for the UE is completed.
  • this step is substantially the same as step 104 in the embodiment of the present application, and details are not repeated here.
  • the implementation of this application can also restrict the location information of user equipment, so that this application can perform congestion control on user equipment within a specified range, improve the practicability of this application, and specify Privacy protection for out-of-range devices.
  • step division of the above various methods is only for the sake of clarity of description. During implementation, it can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. ; Adding insignificant modifications or introducing insignificant designs to the algorithm or process, but not changing the core design of the algorithm and process are all within the scope of protection of this patent.
  • FIG. 5 is The schematic diagram of the congestion control system described in this embodiment includes: a receiving module 401 , a measuring module 402 , a generating module 403 and a controlling module 404 .
  • the receiving module 401 is configured to receive the user plane data of the user equipment UE and the Radius message of the remote authentication dial-up user service, wherein the Radius message includes UE identifier, UE access type and UE location information.
  • the measuring module 402 is configured to measure the round-trip delay RTT of the UE according to the user plane data, and acquire the RTT value of the UE.
  • the generating module 403 is configured to generate a UE speed limit request according to the RTT value and the UE access type when the RTT value satisfies a preset congestion threshold, wherein the UE speed limit request includes speed limit information.
  • the control module 404 is configured to send the UE rate limit request to the policy control function PCF or the policy and charging control function PCRF through the public interface, so that the PCF or PCRF can search in the preset relationship table between rate limit information and rate limit rate.
  • the speed limit rate corresponding to the speed limit information, and the UE speed limit is performed according to the speed limit rate, and the congestion control on the UE is completed.
  • this embodiment is a system embodiment corresponding to the above method embodiment, and this embodiment can be implemented in cooperation with the above method embodiment.
  • the relevant technical details and technical effects mentioned in the above embodiments are still valid in this embodiment, and will not be repeated here to reduce repetition.
  • the relevant technical details mentioned in this embodiment can also be applied in the above embodiments.
  • modules involved in this embodiment are logical modules.
  • a logical unit can be a physical unit, or a part of a physical unit, or multiple physical units. Combination of units.
  • units that are not closely related to solving the technical problem proposed in the present application are not introduced in this embodiment, but this does not mean that there are no other units in this embodiment.
  • FIG. 6 Another embodiment of the present application relates to an electronic device, as shown in FIG. 6 , including: at least one processor 501; and a memory 502 communicatively connected to the at least one processor 501; wherein, the memory 502 stores Instructions that can be executed by the at least one processor 501, the instructions are executed by the at least one processor 501, so that the at least one processor 501 can execute the congestion control methods in the foregoing embodiments.
  • the memory and the processor are connected by a bus
  • the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors and various circuits of the memory together.
  • the bus may also connect together various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and therefore will not be further described herein.
  • the bus interface provides an interface between the bus and the transceivers.
  • a transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing means for communicating with various other devices over a transmission medium.
  • the data processed by the processor is transmitted on the wireless medium through the antenna.
  • the antenna also receives the data and transmits the data to the processor.
  • the processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interface, voltage regulation, power management, and other control functions. Instead, memory can be used to store data that the processor uses when performing operations.
  • Another embodiment of the present application relates to a computer-readable storage medium storing a computer program.
  • the above method embodiments are implemented when the computer program is executed by the processor.
  • a storage medium includes several instructions to make a device ( It may be a single-chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), magnetic disk or optical disc, etc. can store program codes. medium.

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Abstract

本申请实施例涉及无线通信技术领域，特别涉及一种拥塞控制方法、系统、电子设备和存储介质。拥塞控制方法包括：接收用户设备UE的用户面数据和Radius消息，其中，Radius消息包含UE接入类型；根据用户面数据对UE进行往返时延RTT测量，获取所述UE的RTT值；当RTT值满足预设拥塞阈值时，根据RTT值和UE接入类型生成UE限速请求，其中，UE限速请求包含限速信息；通过公用接口将UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供PCF或PCRF在限速信息与限速速率对应关系表中查找与限速信息对应的限速速率，并根据限速速率对UE进行限速，完成对UE的拥塞控制。

Description

拥塞控制方法、系统、电子设备和存储介质
相关申请
本申请要求于2021年12月10号申请的、申请号为202111509237.9的中国专利申请的优先权。
技术领域
本申请实施例涉及无线通信技术领域，特别涉及一种拥塞控制方法、系统、电子设备和存储介质。
背景技术
为了实现移动网络的拥塞控制，3GPP标准在R13引入了无线拥塞感知功能(RAN Congestion Awareness Function，简称RCAF)，以及在R15引入了网络数据分析功能(Network Data Analytics Function，简称NWDAF)，两者都是向策略控制功能(Policy Control Function，简称PCF)或策略和计费控制功能(Policy and Charging Rule Function，简称PCRF)提供无线接入网(Radio Access Network，简称RAN)用户平面拥塞信息以使得PCF或PCRF考虑RAN用户平面拥塞状态，以此作为决定策略的因素。
然而，当前尚无设备商可以提供可商用的RCAF或NWDAF，部分设备商通过私有协议实现的拥塞上报和控制，并不具备通用性，无法在跨厂家设备中应用，使得拥塞上报和控制的实现具有一定的局限性。
发明内容
本申请实施例的主要目的在于提出一种拥塞控制方法、系统、电子设备和存储介质。旨在拥塞控制方法可以在跨厂家设备组网环境下实施应用，具有良好的通用性。
为实现上述目的，本申请实施例提供了一种拥塞控制方法，包括：接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，所述Radius消息包含UE接入类型；根据所述用户面数据对所述UE进行往返时延RTT测量，获取所述UE的RTT值；当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，其中，所述UE限速请求包含限速信息；通过公用接口将所述UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供所述PCF或所述PCRF在预设的限速信息与限速速率对应关系表中查找与所述限速信息对应的限速速率，并根据所述限速速率对所述UE进行限速，完成对所述UE的拥塞控制。
为实现上述目的，本申请实施例还提供一种拥塞控制系统，包括：接收模块，用于接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，所述Radius消息包含UE接入类型；测量模块，用于根据所述用户面数据对所述UE进行往返时延RTT测量，获取所述UE的RTT值；生成模块，用于当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，其中，所述UE限速请求包含限速信息；控制模块，用于通过公用接口将所述UE限速请求发送至策略控制功能PCF或策略和计费控制功能 PCRF，以供所述PCF或所述PCRF在预设的限速信息与限速速率对应关系表中查找与所述限速信息对应的限速速率，并根据所述限速速率对所述UE进行限速，完成对所述UE的拥塞控制。
为实现上述目的，本申请实施例还提供了一种电子设备，包括：至少一个处理器；以及，与所述至少一个处理器通信连接的存储器；其中，所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行上述的拥塞控制方法。
为实现上述目的，本申请实施例还提供了一种计算机可读存储介质，存储有计算机程序，所述计算机程序被处理器执行时实现上述的拥塞控制方法。
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图1是本申请实施方式的应用环境的结构示意图；
图2是本申请实施方式提供的拥塞控制方法的流程图；
图3是本申请实施方式提供的拥塞控制方法的流程图；
图4是本申请实施方式提供的拥塞控制方法的流程图；
图5是本申请实施方式提供的拥塞控制系统的结构示意图；
图6是本申请实施方式提供的电子设备的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请的各实施例进行详细的阐述。然而，本领域的普通技术人员可以理解，在本申请各实施例中，为了使读者更好地理解本申请而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施例的种种变化和修改，也可以实现本申请所要求保护的技术方案。以下各个实施例的划分是为了描述方便，不应对本申请的具体实现方式构成任何限定，各个实施例在不矛盾的前提下可以相互结合相互引用。
本申请的应用环境的结构示意图如图1所示，包括用户面网元、控制面网元、策略控制网元、用户设备、无线接入网和拥塞控制系统，其中，用户面网元可以为用户面公共数据网关(Public Data Network Gate Way，简称PGW-U)或用户面功能(User Plane Function，简称UPF)，用于用户面数据转发，QoS及策略执行，用量上报，计费信息上报等功能；控制面网元可以为控制面公共数据网关PGW-C或会话管理功能(Session Management Function，简称SMF)，用于完成会话管理，UE IP地址分配及管理，UPF选择，会话策略控制等功能；策略控制网元为PCF/PCRF，用于进行接入和移动性策略控制、会话策略控制，对资源请求(Application Function，简称AF)进行授权；拥塞控制系统即为本申请的主体，对UE用户面数据TCP报文进行RTT测量以及数据包丢包率的测量，根据测量值判断是否发生了拥塞，在发生了拥塞后向PCF/PCRF发送对UE进行限速的请求。
本申请的一个实施例涉及一种拥塞控制方法，应用在图1所示的拥塞控制系统上，如图2所示，包括：
步骤101，接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，Radius消息包含UE接入类型。
在一示例实施中，拥塞控制系统所接收的用户面数据是由用户面网元PGW-U/UPF发送的，用户面数据是用户设备正在进行中的业务、浏览业务、用户需求等信息；拥塞控制系统 所接收的远程认证拨号用户服务Radius消息是由控制面网元发送的，Radius消息可以包括UE标识、UE接入类型和UE位置信息，其中，UE标识是指用户设备的IP地址或者其他能够表明用户设备身份的信息；UE接入类型是指用户设备的无线接入信息，UE位置信息可以为跟踪区编码(Tracking Area Code，简称TAC)或者位置区码(Location Area Code，简称LAC)。
步骤102，根据用户面数据对UE进行往返时延RTT测量，获取UE的RTT值。
在一示例实施中，根据用户面网元发送的用户面数据对用户设备进行往返时延RTT测量，本申请采用现有的往返时延RTT测量方法对用户设备进行往返时延RTT测量，获取到用户设备的RTT值。
步骤103，当RTT值满足预设拥塞阈值时，根据RTT值和UE接入类型生成UE限速请求，其中，UE限速请求包含限速信息。
在一示例实施中，拥塞控制系统上存储有UE接入类型与拥塞阈值的对应关系表，在不同的接入类型下都有着不相同的拥塞阈值；拥塞控制系统在获取到用户设备的RTT值之后，首先会基于UE接入类型从对应关系表中获取到相对应的拥塞阈值，之后再判断当前接入类型下该RTT值是否满足预设的拥塞阈值。
在一示例实施中，拥塞控制系统上存储有基于RTT值区间和UE接入类型划分的拥塞等级表，也就是说，拥塞控制系统可以根据RTT值的大小及用户设备当前的接入类型获取用户设备的拥塞等级；拥塞控制系统上存储有拥塞等级和接入类型与限速速率对应关系表，在拥塞等级和接入类型与限速速率对应关系表中存储的是UE拥塞等级、UE接入类型与限速速率的对应关系；拥塞控制系统上预设有限速信息与限速速率对应关系表，限速信息与限速速率对应关系表中存储的是限速请求中的信息组合与限速速率的对应关系，限速请求中的限速信息的具体样式由所采用的具体的协议决定，如：限速请求中的限速信息可以包含MPS标识符和会话资源预留优先级。
在一示例实施中，当RTT值满足预设阈值时，拥塞控制系统从拥塞等级表中获取UE的UE拥塞等级，之后再根据UE拥塞等级和UE接入类型从拥塞等级和接入类型与限速速率对应关系表中获取UE限速速率，从而根据UE拥塞速率从限速信息与限速速率对应关系表，获取限速信息中的MPS标识符和会话资源预留优先级，并形成用户设备的UE限速请求；本申请将用户设备的限速速率转换为MPS标识符和会话资源预留优先级的形式发送至PCF或PCRF，保证拥塞控制系统和PC F或PCRF可以准确的进行通信。
步骤104，通过公用接口将UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供PCF或PCRF在预设的限速信息与限速速率对应关系表中查找与限速信息对应的限速速率，并根据限速速率对UE进行限速，完成对UE的拥塞控制。
在一示例实施中，公用接口可以是Rx接口也可以是N5接口，或者其他的5G标准接口，拥塞控制系统通过公用接口将限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，策略控制功能PCF或策略和计费控制功能PCRF在接收到限速请求之后，在策略控制功能PCF或策略和计费控制功能PCRF上存储的限速信息与限速速率对应关系表中查找与该限速请求中的限速信息对应的限速速率，并通过其他公用接口(如Gx接口或N7接口)向控制面网元PGW-C/SMF发起策略更新，同时在策略更新消息中携带限速速率信息；控制面网元在接收到限速速率之后指示用户面网元PGW-U/UPF执行相对应的限速策略，同时用户面网元PGW-U/UPF向控制面网元PGW-C/SMF返回限速响应，控制面网元PGW-C/SMF再 将限速响应发送至PCF或PCRF。
在一示例实施中，限速请求中还包含有用户设备的UE标识，以供策略控制功能PCF或策略和计费控制功能PCRF根据UE标识获取用户设备的UE签约信息，并根据用户设备的UE签约信息对UE限速请求的授权判断；当授权通过时，策略控制功能PCF或策略和计费控制功能PCRF才会向控制面网元PGW-C/SMF下发消息。
在一示例实施中，拥塞控制系统中所存储的限速信息与限速速率对应关系表和策略控制功能PCF或策略和计费控制功能PCRF中所存储的限速信息与限速速率对应关系表应当保持一致，是在进行拥塞控制之前预先配置好的，以保证拥塞控制系统侧的限速速率和策略控制功能PCF或策略和计费控制功能PCRF侧的限速速率保持一致。
本申请实施例，在无线接入网用户的拥塞控制过程中，接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，所述Radius消息包含UE接入类型；根据所述用户面数据对所述UE进行往返时延RTT测量，获取所述UE的RTT值；当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，其中，所述UE限速请求包含限速信息；通过公用接口将所述UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供所述PCF或所述PCRF在预设的限速信息与限速速率对应关系表中查找与所述限速信息对应的限速速率，并根据所述限速速率对所述UE进行限速，完成对所述UE的拥塞控制。由于本申请所提供的拥塞控制方法中并不存在私有接口，因此本申请可以在跨厂家设备组网环境下实施应用，具有良好的通用性。解决了现有技术中无可商用的RCAF或NWDAF以及部分设备商通过私有协议实现的拥塞上报和控制并不具备通用性，无法在跨厂家设备中应用，所导致使得拥塞上报和控制的实现具有一定的局限性的技术问题。
本申请的一个实施例涉及一种拥塞控制方法，应用在图1所示的拥塞控制系统上，如图3所示，包括：
步骤201，接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，Radius消息包含UE标识和UE接入类型。
在一示例实施中，本步骤与本申请实施例的步骤101大致相同，此处不一一赘述。
步骤202，根据用户面数据对UE进行往返时延RTT测量，获取UE的RTT值。
在一示例实施中，本步骤与本申请实施例的步骤102大致相同，此处不一一赘述。
步骤203，根据UE标识和UE接入类型从预设RTT信息表中获取UE的历史RTT值。
在一示例实施中，拥塞控制系统中存储有RTT信息表，RTT信息表中存储了用户设备UE在各UE接入类型下的历史RTT值，在接收到Radius消息之后，可以根据Radius消息中的UE标识查找该UE对应的所有历史RTT值，并从UE标识对应的所有历史RTT值中筛选出与UE接入类型对应的历史RTT值。
步骤204，当获取到历史RTT值时，根据在第一加权系数和RTT值的乘积的基础上累加第二加权系数和历史RTT值的乘积的值，更新RTT值。
在一示例实施中，当从RTT信息表中获取到历史RTT值时，便需要根据公式更新RTT值＝第一加权系数*RTT值+第二加权系数*历史RTT值来更新RTT值，其中，第一加权系数和第二加权系数是管理人员根据经验设置的数值。
在一示例实施中，当从RTT信息表中获取到历史RTT值时，需要将RTT信息表中的历史RTT值替换为更新后的RTT值。
步骤205，当未获取到历史RTT值时，根据第三加权系数和RTT值的乘积更新RTT值。
在一示例实施中，当从RTT信息表中没有获取到历史RTT值时，便需要根据公式更新RTT值＝第三加权系数*RTT值来获取更新RTT值，其中，第三加权系数也是管理人员根据经验设置的数值。
在一示例实施中，当从RTT信息表中没有获取到历史RTT值时，需要根据UE标识将更新后的RTT值和UE接入类型保存至RTT信息表中。
步骤206，当更新后的RTT值满足预设拥塞阈值时，根据更新后的RTT值和UE接入类型生成UE限速请求，其中，UE限速请求包含限速信息。
在一示例实施中，本步骤与本申请实施例的步骤103大致相同，此处不一一赘述。
在一示例实施中，当更新后的RTT值不满足拥塞阈值时，删除RTT信息表中的历史RTT值，并向策略控制功能PCF或策略和计费控制功能PCRF发送解除限速请求，以供策略控制功能PCF或策略和计费控制功能PCRF根据解除限速请求对UE进行解除限速。
步骤207，通过公用接口将UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供PCF或PCRF在预设的限速信息与限速速率对应关系表中查找与限速信息对应的限速速率，并根据限速速率对UE进行限速，完成对UE的拥塞控制。
在一示例实施中，本步骤与本申请实施例的步骤104大致相同，此处不一一赘述。
本申请的实施方式，在其他实施例的基础之上还可以在获取到用户设备的本次RTT值之后，结合该用户设备的历史RTT值对本次RTT值进行修正，使得本申请并不只是以本次RTT值作为用户设备的拥塞判断依据，而是结合该用户设备的历史拥塞情况来判断用户设备的此次拥塞情况，可以提高本申请对用户设备的拥塞判断的准确度。
本申请的一个实施例涉及一种拥塞控制方法，应用在图1所示的拥塞控制系统上，如图4所示，包括：
步骤301，接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，Radius消息包含UE接入类型和UE位置信息。
在一示例实施中，本步骤与本申请实施例的步骤101大致相同，此处不一一赘述。
步骤302，当UE位置信息属于预设控制范围时，根据用户面数据对UE进行往返时延RTT测量，获取UE的RTT值。
在一示例实施中，当用户设备的位置信息在预设的拥塞控制范围内时，才会对用户设备进行往返时延RTT测量，获取到用户设备的RTT值。
步骤303，当UE位置信息不属于预设控制范围时，则等待UE再次上报Radius消息。
在一示例实施中，当用户设备的位置信息不属于预设的拥塞控制范围内时，说明拥塞控制系统并不能够对该用户设备进行拥塞控制，只能够等该用户设备再次上传Radius消息，查看该用户设备得到位置信息是否发生变化，以及是否属于预设的拥塞控制范围内。
步骤304，当RTT值满足预设拥塞阈值时，根据RTT值和UE接入类型生成UE限速请求，其中，UE限速请求包含限速信息。
在一示例实施中，本步骤与本申请实施例的步骤103大致相同，此处不一一赘述。
步骤305，通过公用接口将UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供PCF或PCRF在预设的限速信息与限速速率对应关系表中查找与限速信息对应的限速速率，并根据限速速率对UE进行限速，完成对UE的拥塞控制。
在一示例实施中，本步骤与本申请实施例的步骤104大致相同，此处不一一赘述。
本申请的实施方式，在其他实施例的基础之上还可以对用户设备的位置信息进行限制，使得本申请能够对指定范围内的用户设备进行拥塞控制，提高本申请的实用性，以及对指定范围外设备的隐私保护性。
上面各种方法的步骤划分，只是为了描述清楚，实现时可以合并为一个步骤或者对某些步骤进行拆分，分解为多个步骤，只要包括相同的逻辑关系，都在本专利的保护范围内；对算法中或者流程中添加无关紧要的修改或者引入无关紧要的设计，但不改变其算法和流程的核心设计都在该专利的保护范围内。
本申请的另一个实施例涉及一种拥塞控制系统，下面对本实施例的拥塞控制系统的细节进行具体的说明，以下内容仅为方便理解提供的实现细节，并非实施本例的必须，图5是本实施例所述的拥塞控制系统的示意图，包括：接收模块401、测量模块402、生成模块403和控制模块404。
其中，接收模块401，用于接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，Radius消息包含UE标识、UE接入类型和UE位置信息。
测量模块402，用于根据用户面数据对UE进行往返时延RTT测量，获取UE的RTT值。
生成模块403，用于当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，其中，所述UE限速请求包含限速信息。
控制模块404，用于通过公用接口将UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供PCF或PCRF在预设的限速信息与限速速率对应关系表中查找与限速信息对应的限速速率，并根据限速速率对UE进行限速，完成对UE的拥塞控制。
不难发现，本实施例为与上述方法实施例对应的系统实施例，本实施例可以与上述方法实施例互相配合实施。上述实施例中提到的相关技术细节和技术效果在本实施例中依然有效，为了减少重复，这里不再赘述。相应地，本实施例中提到的相关技术细节也可应用在上述实施例中。
值得一提的是，本实施例中所涉及到的各模块均为逻辑模块，在实际应用中，一个逻辑单元可以是一个物理单元，也可以是一个物理单元的一部分，还可以以多个物理单元的组合实现。此外，为了突出本申请的创新部分，本实施例中并没有将与解决本申请所提出的技术问题关系不太密切的单元引入，但这并不表明本实施例中不存在其它的单元。
本申请另一个实施例涉及一种电子设备，如图6所示，包括：至少一个处理器501；以及，与所述至少一个处理器501通信连接的存储器502；其中，所述存储器502存储有可被所述至少一个处理器501执行的指令，所述指令被所述至少一个处理器501执行，以使所述至少一个处理器501能够执行上述各实施例中的拥塞控制方法。
其中，存储器和处理器采用总线方式连接，总线可以包括任意数量的互联的总线和桥，总线将一个或多个处理器和存储器的各种电路连接在一起。总线还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路连接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口在总线和收发机之间提供接口。收发机可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经处理器处理的数据通过天线在无线介质上进行传输，在一实施方式中，天线还接收数据并将数据传送给处理器。
处理器负责管理总线和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。而存储器可以被用于存储处理器在执行操作时所使用的数据。
本申请另一个实施例涉及一种计算机可读存储介质，存储有计算机程序。计算机程序被处理器执行时实现上述方法实施例。
即，本领域技术人员可以理解，实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本领域的普通技术人员可以理解，上述各实施方式是实现本申请的具体实施例，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本申请的精神和范围。

Claims (10)

  1. 一种拥塞控制方法，包括：
    接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，所述Radius消息包含UE接入类型；
    根据所述用户面数据对所述UE进行往返时延RTT测量，获取所述UE的RTT值；
    当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，其中，所述UE限速请求包含限速信息；
    通过公用接口将所述UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供所述PCF或所述PCRF在预设的限速信息与限速速率对应关系表中查找与所述限速信息对应的限速速率，并根据所述限速速率对与所述UE进行限速，完成对所述UE的拥塞控制。
  2. 根据权利要求1所述的拥塞控制方法，其中，所述Radius消息还包括UE标识；所述当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，之前包括：
    根据所述UE标识和所述UE接入类型从预设RTT信息表中获取所述UE的历史RTT值；
    当获取到所述历史RTT值时，根据在第一加权系数和所述RTT值的乘积的基础上累加第二加权系数和所述历史RTT值的乘积的值，更新所述RTT值；
    当未获取到所述历史RTT值时，根据第三加权系数和所述RTT值的乘积更新所述RTT值；
    所述当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，包括：
    当更新后的RTT值满足所述拥塞阈值时，根据所述更新后的RTT值和所述UE接入类型生成所述UE限速请求。
  3. 根据权利要求2所述的拥塞控制方法，还包括：
    当获取到所述历史RTT值时，将所述RTT信息表中的所述历史RTT值替换为所述更新后的RTT值；
    当未获取到所述历史RTT值时，根据所述UE标识将所述更新后的RTT值和所述UE接入类型保存至所述RTT信息表中。
  4. 根据权利要求2所述的拥塞控制方法，还包括：
    当所述更新后的RTT值不满足所述拥塞阈值时，删除所述RTT信息表中的所述历史RTT值，并向所述PCF或所述PCRF发送解除限速请求，以供所述PCF或所述PCRF根据所述解除限速请求对所述UE进行解除限速。
  5. 根据权利要求1所述的拥塞控制方法，其中，所述根据所述RTT值和所述UE接入类型生成UE限速请求，包括：
    根据所述RTT值和所述UE接入类型从预设的基于RTT值区间和所述UE接入类型划分的拥塞等级表中，获取所述UE的UE拥塞等级；
    根据所述UE拥塞等级和所述UE接入类型从预设的拥塞等级和接入类型与限速速率对应关系表中，获取所述UE的UE限速速率；
    根据所述UE限速速率从所述限速信息与限速速率对应关系表中，获取所述限速信息， 并形成所述UE限速请求。
  6. 根据权利要求1所述的拥塞控制方法，其中，所述Radius消息还包含UE位置信息；
    所述根据所述用户面数据对所述UE进行往返时延RTT测量，之前包括：
    当所述UE位置信息属于预设控制范围时，则根据所述用户面数据对所述UE进行往返时延RTT测量；
    当所述UE位置信息不属于预设控制范围时，则等待所述UE再次上报所述Radius消息。
  7. 根据权利要求1所述的拥塞控制方法，其中，所述UE限速请求还包括所述UE的UE标识，以供所述PCF或所述PCRF根据所述UE标识获取所述UE的UE签约信息，并根据所述UE签约信息对所述UE限速请求的授权判断。
  8. 一种拥塞控制系统，包括：
    接收模块，设置为接收用户设备UE的用户面数据和远程认证拨号用户服务Radius消息，其中，所述Radius消息包含UE接入类型；
    测量模块，设置为根据所述用户面数据对所述UE进行往返时延RTT测量，获取所述UE的RTT值；
    生成模块，设置为当所述RTT值满足预设拥塞阈值时，根据所述RTT值和所述UE接入类型生成UE限速请求，其中，所述UE限速请求包含限速信息；
    控制模块，设置为通过公用接口将所述UE限速请求发送至策略控制功能PCF或策略和计费控制功能PCRF，以供所述PCF或所述PCRF在预设的限速信息与限速速率对应关系表中查找与所述限速信息对应的限速速率，并根据所述限速速率对所述UE进行限速，完成对所述UE的拥塞控制。
  9. 一种电子设备，包括：
    至少一个处理器；以及，
    与所述至少一个处理器通信连接的存储器；其中，
    所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行如权利要求1至7中任一项所述的拥塞控制方法。
  10. 一种计算机可读存储介质，存储有计算机程序，其中，所述计算机程序被处理器执行时实现权利要求1至7中任一项所述的拥塞控制方法。
PCT/CN2022/132385 2021-12-10 2022-11-16 拥塞控制方法、系统、电子设备和存储介质 WO2023103729A1 (zh)

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