WO2024032011A1

WO2024032011A1 - Cdn scheduling method, cdn scheduling system, and storage medium

Info

Publication number: WO2024032011A1
Application number: PCT/CN2023/087110
Authority: WO
Inventors: 吉晓威; 朱海东; 李强; 胡龙斌; 童浩; 周陶然
Original assignee: 中兴通讯股份有限公司
Priority date: 2022-08-12
Filing date: 2023-04-07
Publication date: 2024-02-15
Also published as: CN117640766A

Abstract

The present application discloses a CDN scheduling method, a CDN scheduling system, and a storage medium. The method is applied to the CDN scheduling system, and comprises: when an access request sent by a terminal is received, acquiring a basic scheduling policy (S110); acquiring link quality information of a plurality of transmission links of a bearer network (S120); and determining a scheduling decision result according to the link quality information and the basic scheduling policy, and sending the scheduling decision result to the terminal, such that the terminal establishes an access connection with a target content node according to the scheduling decision result (S130).

Description

CDN scheduling method, CDN scheduling system, storage medium

Cross-references to related applications

This application is filed based on a Chinese patent application with application number 202210967363.7 and a filing date of August 12, 2022, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

This application relates to but is not limited to the field of communication technology, and in particular, to a CDN scheduling method, CDN scheduling system, and storage medium.

Background technique

CDN (Content Delivery Network) is an intelligent virtual network built on the operator's bearer network. Its basic principle is to widely use various cache servers, that is, content nodes, to distribute these content nodes to areas where user access is relatively concentrated. In the region or network, CND relies on the CDN scheduling system to sense comprehensive information such as the load status of each content node, the distance between each content node and the terminal, and the content distribution status of each content node, and receives the access request from the terminal in the CDN scheduling system. When the terminal access request is directed to the most suitable target content node, the target content node directly responds to the user request, so that the terminal can obtain the required content nearby, reduce network congestion, and improve the response speed and hit rate of terminal access. However, the current CDN scheduling system cannot sense the network quality between the terminal and the target content node. When the network quality between the terminal and the target content node is poor, it affects the terminal's access experience to the target content node.

Contents of the invention

Embodiments of the present application provide a CDN scheduling method, a CDN scheduling system, and a storage medium.

In the first aspect, embodiments of the present application provide a CDN scheduling method, which is applied to a CDN scheduling system. The method includes: when receiving an access request sent by a terminal, obtaining a basic scheduling policy; obtaining multiple transmission links of the bearer network link quality information; determine the scheduling decision result according to the link quality information and the basic scheduling policy, and send the scheduling decision result to the terminal, so that the terminal determines the scheduling decision result and the target content according to the scheduling decision result The node establishes an access connection.

In the second aspect, embodiments of the present application provide a CDN scheduling system, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following is implemented: The CDN scheduling method described in the first aspect.

In a third aspect, embodiments of the present application further provide a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are used to execute the CDN scheduling method as described in the first aspect.

Description of drawings

Figure 1 is a step flow chart of a CDN scheduling method provided by an embodiment of the present application;

Figure 2 is a flow chart of steps for obtaining link quality information provided by another embodiment of the present application;

Figure 3 is a flow chart of steps for obtaining link quality information provided by another embodiment of the present application;

Figure 4 is a flow chart of steps for determining scheduling decision results provided by another embodiment of the present application;

Figure 5 is a flow chart of steps for determining scheduling decision results provided by another embodiment of the present application;

Figure 6 is a flowchart of steps for determining scheduling decision results provided by another embodiment of the present application;

Figure 7 is a flowchart of steps for determining scheduling decision results provided by another embodiment of the present application;

Figure 8 is a schematic diagram of a module for executing a CDN scheduling method provided by another embodiment of the present application;

Figure 9 is a schematic diagram of a module for executing a quality measurement task sent to a network device provided by another embodiment of the present application;

Figure 10 is a schematic diagram of a module for determining device link quality information provided by another embodiment of the present application;

Figure 11 is a step flow chart of a CDN scheduling method provided by another embodiment of the present application;

Figure 12 is a structural diagram of a CDN scheduling system provided by another embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the embodiments described here are only used to explain the present application and are not used to limit the present application.

It will be understood that although the functional modules are divided in the device schematic diagram and the logical sequence is shown in the flowchart, in some cases, the modules may be divided into different modules in the device or the order in the flowchart may be executed. The steps shown or described. The terms "first", "second", etc. in the description, claims or the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

The present application provides a CDN scheduling method, a CDN scheduling system, and a storage medium. The CDN scheduling method is applied to the CDN scheduling system. The method includes: when receiving an access request sent by a terminal, obtaining a basic scheduling policy. ; Obtain link quality information of multiple transmission links of the bearer network; determine a scheduling decision result according to the link quality information and the basic scheduling policy, and send the scheduling decision result to the terminal, so that the The terminal establishes an access connection with the target content node according to the scheduling decision result. According to the solution provided by the embodiment of the present application, by using the link quality information of the transmission link in the bearer network as a consideration factor in determining the scheduling decision result, so that the terminal can establish an access connection with the target content node based on the scheduling decision result, which can effectively Improve the terminal’s access experience to content nodes.

The embodiments of the present application will be further described below with reference to the accompanying drawings.

As shown in Figure 1, Figure 1 is a step flow chart of a CDN scheduling method provided by an embodiment of the present application. An embodiment of the present application provides a CDN scheduling method, which is applied to a CDN scheduling system. The CDN scheduling method includes but is not limited to There are following steps:

Step S110, when receiving the access request sent by the terminal, obtain the basic scheduling policy;

It can be understood that when a terminal accesses a website to request content, it needs to first send an access request to the CDN scheduling system. The embodiment of the present application does not limit the specific content of the access request sent by the terminal, which may include the terminal IP address and the unified resources of the website. Locator (Uniform Resource Locator, URL) and other information; since the CDN scheduling system communication connection has multiple content nodes, the basic scheduling strategy is used to obtain the most appropriate target content node from multiple content nodes for the terminal’s access request. Therefore, When the CDN scheduling system receives the access request sent by the terminal, it obtains the basic scheduling policy, which can provide an effective data basis for determining the target content node.

Step S120: Obtain link quality information of multiple transmission links of the bearer network;

It can be understood that in some existing situations, the CDN scheduling system only selects the target content node for the terminal based on the basic scheduling strategy. However, the basic scheduling strategy only considers the network accessibility from the CDN scheduling system to the content node, and does not consider the network accessibility of the CDN scheduling system to the content node. Consider the network quality between the terminal and the content node; therefore, when the CDN scheduling system selects the target content node based on the basic scheduling policy, the CDN scheduling system cannot sense the network quality between the terminal and the target content node. When the terminal and the target content node Poor network quality between target content nodes will affect the terminal's access experience to the target content nodes. The embodiments of this application do not limit the connection relationship between the CDN scheduling system, the terminal and the bearer network. Referring to Figure 8, the CDN scheduling system is communicatively connected to the terminal. The CDN scheduling system and the terminal are respectively communicatively connected to the bearer network. The bearer network includes Multiple transmission links, each of which communicates with different content nodes. By obtaining the link quality information of each transmission link in the bearer network, the link of the transmission link between the terminal and the target content node can be determined. road quality, thereby providing an effective data basis for determining the results of scheduling decisions.

Step S130: Determine the scheduling decision result based on the link quality information and the basic scheduling policy, and send the scheduling decision result to the terminal, so that the terminal establishes an access connection with the target content node based on the scheduling decision result.

It can be understood that the link quality information of the transmission link and the preset basic scheduling policy are used as reference factors to determine the scheduling decision result, that is, according to the network accessibility of the CDN scheduling system to the target content node and the terminal and target content node The link quality of the transmission link between them determines the scheduling decision result, thereby providing an effective data basis for determining a more reliable target content node, so that the terminal can establish a reliable access connection with the target content node based on the scheduling decision result, further ensuring The terminal’s access experience to the target content node.

In addition, referring to Figure 2, in one embodiment, step S120 in the embodiment shown in Figure 1 also includes but is not limited to the following steps:

Step S210, obtain the preset detection period;

Step S220: Perform network quality measurement on multiple transmission links carrying the network according to the detection period to obtain link quality information.

It can be understood that the detection period can be determined by those skilled in the art according to the actual situation. The CDN scheduling system can regularly detect whether the time interval between the current time and the previous time when the network quality detection operation was performed on multiple transmission links of the bearer network is When the detection period is reached, when the time interval reaches the detection period, the historical link quality information before the current time point is obtained. Based on the historical link quality information, the network quality is measured again for each transmission link in the bearer network. The link quality information is updated to obtain new link quality information.

In addition, referring to Figure 3, in one embodiment, the bearer network includes multiple network devices, and each transmission link is composed of at least two communication-connected network devices. Step S120 in the embodiment shown in Figure 1 also includes but does not Limited to the following steps:

Step S310: Send quality measurement tasks to all network devices so that each network device determines device link quality information according to preset rules, where the device link quality information is the link between two network devices connected to each other. quality information;

Step S320: Obtain the link quality information of each transmission link according to the device link quality information, where the link quality information is obtained according to the device link quality information fed back by the network device belonging to the same transmission link.

The embodiments of this application do not limit the specific way in which the CDN scheduling system sends quality measurement tasks to network devices in the bearer network. It can be as shown in Figure 8 and Figure 9. The CDN scheduling system 820 is communicatively connected to the network controller 830. The CDN scheduling system The system 820 is communicatively connected to all network devices in the bearer network 840 through the network controller 830. Each transmission link 880 in the bearer network 840 is composed of at least two communicatively connected network devices; the CDN scheduling system 820 reports to the network controller 830 Send a network quality request. The network quality request may include the IP address of the network device in the bearer network 840. The specific content of the network quality request is not limited here. The CDN scheduling system 820 sends a request to all networks in the bearer network 840 through the network controller 830. The device sends a quality measurement task; it can also be that the CDN scheduling system 820 has a built-in function with the network controller 830 Using the same module, the CDN scheduling system 820 can directly control the module to send quality measurement tasks to network devices in the bearer network 840 within a preset detection period.

It can be understood that after receiving the quality measurement task, each network device determines the device link quality information according to the preset rules. The device link quality information is the link quality information between the two network devices connected to each other. According to the attribution The device link quality information fed back by network devices on the same transmission link obtains the link quality information of each transmission link, thereby providing an effective data basis for determining the results of scheduling decisions.

In an embodiment of the present application, the link quality information may include packet loss rate, delay or jitter value. The specific content of the link quality information is not limited here.

In addition, in one embodiment, referring to Figures 8 to 10, the network device at least includes a first network device 850 and a second network device 860. The first network device 850 and the second network device 860 are communicated and connected for determining the device chain. The preset rules for path quality information may include the following steps: when the first network device 850 obtains the quality measurement task, determine the third network device 860 with the second network device 860 through the Two-Way Active Measurement Protocol (TWAMP). One quality detection information; when the second network device 860 obtains the quality measurement task, it determines the second quality detection information with the first network device 850 through TWAMP; according to the first quality detection information and the second quality detection information, the second quality detection information is obtained Device link quality information between a network device 850 and a second network device 860.

It can be understood that since the first network device 850 and the second network device 860 are communicatively connected, the first network device 850 and the second network device 860 belong to the same transmission link 880, and the first network device 850 and the second network device 860 belong to the same transmission link 880. After obtaining the quality measurement task, the first network device 850 and the second network device 860 each start TWAMP to detect the quality detection information with the other party. The first network device 850 determines the quality detection information with the second network device 860 through TWAMP. The first quality detection information and the second quality detection information between the second network device 860 and the first network device 850 are determined through TWAMP. According to the first quality detection information and the second quality detection information, the first network device 850 and the first network device 850 can be obtained. The link quality information of the transmission link 880 between the second network device 860 realizes end-to-end connectivity, delay, and packet loss detection of the transmission link; after obtaining the first network device 850 and the second After the link quality information of the link 880 is transmitted between the network devices 860, the link quality information is fed back to the CDN scheduling system 820 through the network controller 830 as a network quality result, so that the CDN scheduling system 820 receives the information from the terminal 810. After the access request, the target transmission link is determined from the multiple transmission links 880 according to the target scheduling policy that combines the network quality results and the basic scheduling policy, that is, from the content node corresponding to the communication connection with the multiple transmission links 880 (for example, FIG. 7 (including content node A871, content node B872, and content node C873), and the target content node is fed back to the terminal 810 as the scheduling decision result, so as to realize the content access of the target content node by the terminal 810.

In addition, in one embodiment, the basic scheduling policy includes at least one basic scheduling element. Referring to Figure 4, step S130 in the embodiment shown in Figure 1 also includes but is not limited to the following steps:

Step S410, determine link quality information as link scheduling elements;

Step S420: Allocate element weights to basic scheduling elements and link scheduling elements according to the preset weight allocation strategy;

Step S430, determine the basic scheduling elements and link scheduling elements with assigned element weights as the target scheduling elements of the target scheduling policy;

Step S440: Determine the scheduling decision result according to the target scheduling policy.

It can be understood that those skilled in the art can select a weight allocation strategy according to the actual situation, allocate different element weights to the basic scheduling elements and link scheduling elements, and determine the basic scheduling elements and link scheduling elements with assigned element weights as targets. The target scheduling element of the scheduling policy; for example, when the element corresponding to the link scheduling element corresponding to the target scheduling policy The weight is greater than the element weight corresponding to the basic scheduling element, that is, when the target content node is determined through the target scheduling policy, the link scheduling element is the target scheduling element with the largest weight, and the link quality of the transmission link in the bearer network is given priority to ensure The scheduling decision result can ensure the quality of the network between the terminal and the target content node, and ensure the access experience of the terminal. It can also allocate weights equally to each target scheduling element, and there are no restrictions here.

It can be understood that determining the basic scheduling elements and link scheduling elements with good element weights are determined as target scheduling elements, thereby forming a target scheduling strategy, which can effectively ensure that the scheduling decision results determined according to the target scheduling strategy satisfy the relationship between the target content node and the terminal. The link quality of the transmission link between the two, thereby improving the terminal's access experience to the target content node.

In addition, the embodiments of this application do not limit the specific content of the basic scheduling elements included in the basic scheduling policy. The basic scheduling elements may be geographical location indicators for content nodes, node service quality indicators for content nodes, and node loads for content nodes. Metrics, or node content distribution metrics for content nodes.

In addition, referring to Figure 5, in one embodiment, step S440 in the embodiment shown in Figure 4 also includes but is not limited to the following steps:

Step S510: Determine the target transmission link from multiple transmission links according to the target scheduling policy;

Step S520: Generate a scheduling decision result based on the target transmission link.

In addition, referring to Figure 6, in one embodiment, step S440 in the embodiment shown in Figure 4 also includes but is not limited to the following steps:

Step S610: Determine the target transmission link from multiple transmission links according to the target scheduling policy;

Step S620, determine the content node communicatively connected to the target transmission link as the target content node;

Step S630: Generate a scheduling decision result according to the target content node.

It can be understood that the embodiments of the present application do not limit the specific content of the scheduling decision result. The scheduling decision result may include the target transmission link or the target content node. Referring to Figures 8 to 10, since each transmission link in the bearer network Each communication connection has different content nodes. When a target transmission link is determined from multiple transmission links in the bearer network according to the target scheduling policy, then the content node communicating with the target transmission link is determined to be the target content node. , sending the scheduling decision result including the target transmission link or the target content node to the terminal can enable the terminal to establish an access connection with the target content node based on the scheduling decision result.

In addition, referring to Figure 7, in one embodiment, step S130 in the embodiment shown in Figure 1 also includes but is not limited to the following steps:

Step S710: Determine available transmission links from the transmission links according to the preset link quality threshold and the link quality information;

Step S720: Determine a target transmission link from the available transmission links according to the target scheduling policy, and generate the scheduling decision result according to the target transmission link.

It can be understood that the available transmission links are preferably determined from multiple transmission links in the bearer network based on the preset link quality threshold and link quality information. The link quality information may include packet loss rate, jitter value and Response delay and other information, the link quality threshold can represent the lowest threshold value of link quality information that ensures reliable communication and transmission of the transmission link, and the available ones that are greater than the link quality threshold are screened out from multiple transmission links in the bearer network transmission link to ensure that the scheduling decision results can guarantee the network quality between the terminal and the target content node and ensure the terminal's access experience.

The following uses an embodiment to describe the steps for the CDN scheduling system to determine the scheduling decision results based on link quality information and basic scheduling strategies: the basic scheduling strategy may include geographical location indicators for content nodes, node service quality indicators for content nodes, and node service quality indicators for content nodes. Scheduling requirements include node load indicators of content nodes and node content distribution indicators for content nodes. elements, combining all scheduling elements and link quality information in the basic scheduling policy into the target scheduling elements of the target scheduling policy; when the terminal accesses the website to request content, it sends an access request to the CDN scheduling system. The access request includes the terminal IP address, website URL information, when the CDN scheduling system receives the access request from the terminal, the CDN scheduling system first determines the available transmission link from the transmission links in the bearer network based on the preset link quality threshold and link quality information. , and then combine the access request and the target scheduling elements of the target scheduling policy to select the target transmission link from multiple available transmission links. Each available transmission link is connected to a content node. The steps for selecting the target transmission link may include: CDN The scheduling system combines the terminal IP address and the geographical location indicators of the content nodes corresponding to each available transmission link to select the available transmission links corresponding to the content nodes that are closer to the terminal; the CDN scheduling system combines the URL information of the website and the nodes of the content nodes. The content distribution index selects the available transmission links corresponding to the content nodes that store the content required by the terminal; the CDN scheduling system determines the load of the content nodes corresponding to each available transmission link and selects the available transmission links corresponding to the content nodes with service capabilities. Transmission link: conduct a comprehensive analysis based on the above scheduling elements and corresponding element weights, determine the target transmission link from the available transmission links, and then generate a scheduling decision result corresponding to the target transmission link, and send the scheduling decision result to the terminal , thereby enabling the terminal to establish a reliable access connection with the target content node based on the scheduling decision results, further ensuring the terminal's access experience to the target content node.

In addition, in order to explain the CDN scheduling method provided by this application in more detail, the technical solution of this application is described below using an embodiment.

Embodiment 1: Refer to Figure 11, which is a step flow chart of a CDN scheduling method provided by another embodiment of the present application. The CDN scheduling method is based on the module diagram for executing the CDN scheduling method as shown in Figure 8. The CDN scheduling method includes Follow these steps:

Step S910: The network controller pre-deploys a network quality measurement task and delivers the quality measurement task to all network devices in the bearer network, where the network devices at least include a first network device and a second network device, and the first network device and the second network device. Network devices belong to the same transmission link;

Step S920: Perform periodic quality detection through TWAMP between the first network device and the second network device to obtain link quality information of the transmission link between the first network device and the second network device, and generate a link quality information based on the link quality information. Network quality results;

Step S930: Feed back the network quality results to the network controller;

Step S940: The terminal initiates an access request to the CDN scheduling system;

Step S950: The CDN scheduling system initiates a network quality request to the network controller. The network quality request includes the network element IP address, and the network element IP address is the IP address of the network device in the bearer network;

Step S960: The network controller feeds back the network quality results to the CDN scheduling system;

Step S970: The CDN scheduling system obtains link quality information from the network quality results, determines available transmission links from multiple transmission links in the bearer network based on the link quality information, and selects available transmission links from the available transmission links according to the target scheduling policy. Determine the target transmission link, determine the content node connected to the target transmission link as the target content node, generate a scheduling decision result based on the target content node, and feed back the scheduling decision result to the terminal, where the target scheduling strategy is based on the basic scheduling strategy A policy that is combined with a link quality policy corresponding to the link quality information, and each target scheduling element in the target scheduling policy is assigned a different element weight;

Step S980: The terminal initiates a content access request to the target content node according to the scheduling decision result;

Step S990: The target content node feeds back the terminal request result to the terminal.

It can be understood that this application uses the link quality information of the transmission link in the bearer network as the determination target content. The consideration factors of nodes can effectively improve the terminal's access experience to content nodes.

In addition, refer to Figure 11, which is a structural diagram of a CDN scheduling system provided by another embodiment of the present application. An embodiment of the present application also provides a CDN scheduling system 1000. The CDN scheduling system 1000 includes: a memory 1010, Processor 1020 and computer programs stored on memory 1010 and executable on processor 1020 .

The processor 1020 and the memory 1010 may be connected through a bus or other means.

The non-transitory software programs and instructions required to implement the CDN scheduling method of the above embodiment are stored in the memory 1010. When executed by the processor 1020, the CDN scheduling method applied to the CDN scheduling system 1000 in the above embodiment is executed, for example , execute the above-described method steps S110 to S130 in Fig. 1, method steps S210 to S220 in Fig. 2, method steps S310 to S320 in Fig. 3, method steps S410 to S440 in Fig. 4, Fig. The method steps S510 to S520 in 5, the method steps S610 to S630 in Fig. 6, and the method steps S710 to S720 in Fig. 7.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separate, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, an embodiment of the present application also provides a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are executed by a processor or controller, for example, by the above-mentioned Execution by a processor 1020 in the CDN scheduling system embodiment can cause the above-mentioned processor 1020 to execute the CDN scheduling method applied to the CDN scheduling system in the above embodiment, for example, execute the above-described method steps S110 to steps in Figure 1 S130, the method steps S210 to S220 in Figure 2, the method steps S310 to S320 in Figure 3, the method steps S410 to S440 in Figure 4, the method steps S510 to S520 in Figure 5, the method steps S510 to S520 in Figure 6 Method steps S610 to step S630, and method steps S710 to step S720 in FIG. 7 .

Embodiments of the present application provide a CDN scheduling method, a CDN scheduling system, and a storage medium. The CDN scheduling method is applied to the CDN scheduling system, including: when receiving an access request sent by a terminal, obtaining a basic scheduling policy; obtaining the information of a bearer network. Link quality information of multiple transmission links; determine a scheduling decision result according to the link quality information and the basic scheduling policy, and send the scheduling decision result to the terminal, so that the terminal The decision result establishes an access connection with the target content node. According to the solution provided by the embodiment of the present application, by using the link quality information of the transmission link in the bearer network as a consideration factor in determining the scheduling decision result, so that the terminal can establish an access connection with the target content node based on the scheduling decision result, which can effectively Improve the terminal’s access experience to content nodes.

Those of ordinary skill in the art can understand that all or some steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor 1020, or a microprocessor, or as hardware, or as integrated circuits, such as application specific integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is known to those of ordinary skill in the art, the term computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. removable, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer. Additionally, it is well known to those of ordinary skill in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other means such as carrier waves or other transmissions. other data in a modulated data signal, such as a transmission mechanism, and may include any information delivery medium.

Claims

A CDN scheduling method, applied to a CDN scheduling system, the method includes:

When receiving the access request sent by the terminal, obtain the basic scheduling policy;

Obtain link quality information of multiple transmission links carrying the network;

The scheduling decision result is determined according to the link quality information and the basic scheduling policy, and the scheduling decision result is sent to the terminal, so that the terminal establishes an access connection with the target content node according to the scheduling decision result.
The method according to claim 1, wherein said obtaining link quality information of each said transmission link includes:

Get the preset detection cycle;

Perform network quality measurement on multiple transmission links of the bearer network according to the detection period to obtain the link quality information.
The method according to claim 1 or 2, wherein the bearer network includes a plurality of network devices, each of the transmission links is composed of at least two communication connected network devices, and the acquisition of multiple network devices of the bearer network Link quality information of transmission links, including:

Send quality measurement tasks to all network devices, so that each network device determines device link quality information according to preset rules, wherein the device link quality information is two network devices connected to each other. Link quality information between;

The link quality information of each transmission link is obtained according to the device link quality information, wherein the link quality information is based on the device link fed back by the network device belonging to the same transmission link. Road quality information is obtained.
The method according to claim 3, wherein the network device at least includes a first network device and a second network device, the first network device and the second network device are communicatively connected, and the preset rules include:

When the first network device obtains the quality measurement task, determine the first quality detection information with the second network device through TWAMP;

When the second network device obtains the quality measurement task, determine the second quality detection information with the first network device through TWAMP;

According to the first quality detection information and the second quality detection information, the device link quality information between the first network device and the second network device is obtained.
The method according to claim 1, wherein the basic scheduling policy includes at least one basic scheduling element, and determining the scheduling decision result according to the link quality information and the basic scheduling policy includes:

Determine the link quality information as a link scheduling element;

Assign element weights to the basic scheduling elements and the link scheduling elements according to a preset weight allocation strategy;

Determine the basic scheduling elements and the link scheduling elements with assigned element weights as target scheduling elements of the target scheduling policy;

The scheduling decision result is determined according to the target scheduling policy.
The method according to claim 5, wherein the determining the scheduling decision result according to the target scheduling policy includes:

Determine the target transmission link from a plurality of the transmission links according to the target scheduling policy;

The scheduling decision result is generated according to the target transmission link.
The method according to claim 5, wherein the determining the scheduling decision result according to the target scheduling policy includes:

Determine the target transmission link from a plurality of the transmission links according to the target scheduling policy;

Determine the content node communicatively connected to the target transmission link as the target content node;

The scheduling decision result is generated according to the target content node.
The method according to claim 5, wherein determining the scheduling decision result according to the link quality information and the basic scheduling policy includes:

Determine available transmission links from the transmission links according to the preset link quality threshold and the link quality information;

Determine a target transmission link from the available transmission links according to the target scheduling policy, and generate the scheduling decision result according to the target transmission link.
The method according to claim 5, wherein the basic scheduling elements include at least one of the following:

The geographical location indicator of the content node; or

The node service quality indicator of the content node; or

The node load indicator of the content node; or

The node content distribution index of the content node.
A CDN scheduling system, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements any one of claims 1 to 9. The CDN scheduling method described above.
A computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute the CDN scheduling method according to any one of claims 1 to 9.