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WO2024032011A1 - Procédé de planification de cdn, système de planification de cdn et support d'enregistrement - Google Patents

Procédé de planification de cdn, système de planification de cdn et support d'enregistrement Download PDF

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Publication number
WO2024032011A1
WO2024032011A1 PCT/CN2023/087110 CN2023087110W WO2024032011A1 WO 2024032011 A1 WO2024032011 A1 WO 2024032011A1 CN 2023087110 W CN2023087110 W CN 2023087110W WO 2024032011 A1 WO2024032011 A1 WO 2024032011A1
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WIPO (PCT)
Prior art keywords
scheduling
link
target
quality information
network
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Ceased
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PCT/CN2023/087110
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English (en)
Chinese (zh)
Inventor
吉晓威
朱海东
李强
胡龙斌
童浩
周陶然
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ZTE Corp
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ZTE Corp
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Publication of WO2024032011A1 publication Critical patent/WO2024032011A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/61—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources taking into account QoS or priority requirements

Definitions

  • 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.
  • CDN Content Delivery Network
  • CND Concept Delivery Network
  • 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.
  • 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.
  • 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.
  • Embodiments of the present application provide a CDN scheduling method, a CDN scheduling system, and a storage medium.
  • 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.
  • 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.
  • the processor executes the computer program, the following is implemented: The CDN scheduling method described in the first 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.
  • 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.
  • FIG. 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.
  • 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.
  • the terminal 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.
  • 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
  • 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.
  • Locator Uniform Resource Locator
  • Step S120 Obtain link quality information of multiple transmission links of the bearer network
  • the CDN scheduling system only selects the target content node for the terminal based on the basic scheduling strategy.
  • 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.
  • the CDN scheduling system cannot sense the network quality between the terminal and the target content node.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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).
  • TWAMP Two-Way Active Measurement Protocol
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the target scheduling policy that combines the network quality results and the basic scheduling policy
  • the basic scheduling policy includes at least one basic scheduling element.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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 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.
  • the access request includes the terminal IP address, website URL information
  • the CDN scheduling system 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.
  • 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.
  • 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.
  • FIG 11 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.
  • 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 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.
  • 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.
  • the terminal 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.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente demande divulgue un procédé de planification de CDN, un système de planification de CDN et un support d'enregistrement. Le procédé est appliqué au système de planification de CDN, et comprend les étapes suivantes : lorsqu'une requête d'accès envoyée par un terminal est reçue, l'acquisition d'une politique de planification de base (S110) ; l'acquisition d'informations de qualité de liaison d'une pluralité de liaisons de transmission d'un réseau support (S120) ; et la détermination d'un résultat de décision de planification en fonction des informations de qualité de liaison et de la politique de planification de base, et l'envoi du résultat de décision de planification au terminal, de telle sorte que le terminal établit une connexion d'accès avec un nœud de contenu cible selon le résultat de décision de planification (S130).
PCT/CN2023/087110 2022-08-12 2023-04-07 Procédé de planification de cdn, système de planification de cdn et support d'enregistrement Ceased WO2024032011A1 (fr)

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