WO2014059828A1

WO2014059828A1 - Method and system for adjusting control policy

Info

Publication number: WO2014059828A1
Application number: PCT/CN2013/082490
Authority: WO
Inventors: 黄孙亮; 陈建业; 范成法; 李宏飚
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-10-16
Filing date: 2013-08-28
Publication date: 2014-04-24
Also published as: CN102891804A; CN102891804B

Abstract

Disclosed are a method and system for adjusting a control policy. In the method, a network service control device acquires current network state information; and the network service control device initiates a control policy adjustment request to a CDN serving node according to the acquired current network state information, the control policy adjustment request being used for requesting the CDN service node to adjust data traffic delivered to a user. The technical solution provided by the present invention can prevent an excessively high acceleration rate of a single user, thereby preventing overuse of network resources and the influence on the network stability and usability By flexibly adjusting data traffic delivered to the user, user traffic can also be flexibly adjusted at a network port when congestion possibly occurs at the network port so as to avoid network congestion.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and system for adjusting a control strategy. BACKGROUND With the rapid development of Internet services, especially the development of video services, service providers need to provide a large number of Content Delivery Network (CDN) services to improve the service quality of Internet services. This change has contributed to the large-scale use of CDN. However, since the CDN system in the related art is completely separated from the communication network, the CDN system cannot sense the state of the communication network. Therefore, when the CDN system distributes or accelerates the application content of the user, the network state cannot be perceived. This causes the application content of the CDN to accelerate to match the network. For example, the current network is already in a congested state, and the CDN system still sends traffic at a faster rate, which leads to a more congested network state and a large amount of packet loss. Affects the performance of the network. At the same time, because the congestion scheduling increases the network delay and a large number of packet loss, the information loss and disorder of the service flow greatly affect the quality of the Internet service. SUMMARY OF THE INVENTION The present invention provides a request method and system for controlling policy adjustment to at least solve the related art

The separation of the CDN system from the communication network tends to increase network congestion, and a large number of packet loss phenomena affect network performance. According to an aspect of the present invention, a method of adjusting a control strategy is provided. The request method for adjusting the control policy according to the present invention includes: the network service control device acquires current network state information; and the network service control device initiates a control policy adjustment request to the CDN service node according to the obtained current network state information, where the control policy adjustment request is Used to request the CDN service node to adjust the data traffic distributed to the user. Preferably, after the network service control device initiates the control policy adjustment request to the CDN serving node according to the obtained current network state information, the method further includes: obtaining, by the CDN serving node, the identifier information of the user and the network service control device indication from the control policy adjustment request The control policy information adopted by the CDN service node; the CDN service node adjusts the current control policy adopted by the user according to the obtained identification information and the control policy information that the network service control device instructs the CDN service node to take. Preferably, before the network service control device initiates the control policy adjustment request to the CDN service node according to the obtained current network state information, the method further includes: after the network service control device starts the domain name service DNS, the CDN system obtains the user's DNS resolution request; The CDN system locates the user to the network service control device according to the DNS resolution request; the CDN system determines the CDN service node that controls the user according to the preset correspondence between the CDN service node and the network service control device. Preferably, after the CDN serving node adjusts the control policy currently adopted by the user according to the obtained identification information and the control policy information that the network service control device instructs the CDN service node to adopt, the CDN service node further includes: The adjustment result is fed back to the network service control device. Preferably, the current network status information includes at least one of: a network download rate of one or more users corresponding to the preset port in the network service control device; and one or more corresponding to the preset port in the network service control device Application download rate of the user; current network bandwidth utilization of the preset port in the network service control device; packet loss when the service data stream is transmitted by one or more users corresponding to the preset port in the network service control device Rate; a network delay in which one or more users corresponding to preset ports in the network service control device receive the service data stream. Preferably, the CDN service node adjusts the control policy currently adopted by the user, including at least one of the following: when the application download rate of the one or more users corresponding to the preset port is less than the first preset threshold, the CDN service node increases a download rate of a preset number of users in a user or a plurality of users corresponding to the preset port; when the application download rate of one or more users corresponding to the preset port is greater than a second preset threshold, the CDN service node is lowered a download rate of a preset number of users in a user or a plurality of users corresponding to the preset port; when the current bandwidth utilization of the preset port is greater than a third preset threshold, the CDN serving node lowers a user corresponding to the preset port or The download rate of the preset number of users among the plurality of users; when the packet loss rate of the one or more users corresponding to the preset port is greater than the fourth preset threshold, the CDN service node is lowered and preset The download rate of a preset number of users among one user or multiple users corresponding to the port; one or one corresponding to the preset port When the network delay of the plurality of users receiving the service data stream is greater than the fifth preset threshold, the CDN serving node reduces the download rate of the preset number of users of one user or multiple users corresponding to the preset port; When the network download rate of the corresponding one or more users is greater than the sixth preset threshold, the CDN serving node reduces the download rate of the preset number of users of one user or multiple users corresponding to the preset port. According to another aspect of the present invention, an adjustment system for a control strategy is provided. The request system for adjusting the control policy according to the present invention includes: a network service control device; the network service control device includes: a first acquisition module, configured to acquire current network state information; and a first request module, configured as a root The control policy adjustment request is initiated to the CDN service node according to the obtained current network state information, where the control policy adjustment request is used to request the CDN service node to adjust the data traffic distributed to the user. Preferably, the system further includes: a CDN service node; the CDN service node includes: a second obtaining module, configured to acquire the identification information of the user from the control policy adjustment request, and the network service control device instructs the control policy information adopted by the CDN service node; The adjustment module is configured to adjust the current control policy adopted by the user according to the obtained identification information and the network service control device instructing the control policy information adopted by the CDN service node. Preferably, the system further includes: a CDN system; the CDN system includes: a third obtaining module, configured to: after the network service control device starts the domain name service DNS, obtain a DNS resolution request of the user; and the positioning module is configured to: according to the DNS resolution request The user locates the network service control device; and the determining module is configured to determine a CDN service node that controls the user according to a preset correspondence between the CDN service node and the network service control device. Preferably, the CDN service node further includes: a feedback module, configured to feed back the adjustment result to the network service control device. Through the invention, the network service control device is used to monitor the current network state information of the user, and when the current network state of the user is abnormal, the CDN service node initiates a control policy adjustment request to the user, and the CDN service node obtains the The control policy adjustment request adjusts the data traffic distributed to the user, and solves the problem that the CDN system and the communication network in the related art are separated from each other, which tends to increase network state congestion, cause a large number of packet loss phenomena, affect network performance, and thereby avoid a single user. The acceleration rate is too high, over-use of network resources, affecting the stability and availability of the network, and flexibly adjusting the data traffic distributed to users. It can also flexibly adjust users under the network port when congestion occurs on the network port. Traffic, to avoid network congestion. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawing

1 is a flowchart of a method for adjusting a control policy according to an embodiment of the present invention; FIG. 2 is a flowchart of user application bearer service interaction according to a preferred embodiment of the present invention; FIG. 3 is a user application acceleration according to a preferred embodiment of the present invention. Flow chart of the method of adjusting the strategy; 4 is a structural block diagram of an adjustment system of a control strategy according to an embodiment of the present invention; FIG. 5 is a structural block diagram of an adjustment system of a control strategy according to a preferred embodiment of the present invention; FIG. 6 is a CDN system and a preferred embodiment of the present invention. Schematic diagram of the overall deployment of a network device; FIG. 7 is a schematic diagram of an allocation policy deployment of a CDN service node in accordance with a preferred embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. 1 is a flow chart of a method of adjusting a control strategy according to an embodiment of the present invention. As shown in FIG. 1, the method may include the following processing steps: Step S102: The network service control device acquires current network state information. Step S104: The network service control device initiates a control policy adjustment to the CDN service node according to the obtained current network state information. The request, where the control policy adjustment request is used to request the CDN service node to adjust the data traffic distributed to the user. In the related art, the CDN system and the communication network are separated from each other, which tends to increase network state congestion, and a large number of packet loss phenomena occur, which affects network performance. As shown in Figure 1, the CDN system and the network system need to have certain control mechanisms when carrying specific services, especially according to the status of the network, the connection status of the user, the network usage status of the user, the download rate of the application, etc. Information, flexible, appropriately controlled and adjusted. The network service control device monitors the current network state information of the user, and initiates a control policy adjustment request to the CDN service node when the current network state of the user is abnormal, and the CDN service node adjusts the request according to the obtained control policy. Adjusting the data traffic distributed to users, solving the problem that the CDN system and the communication network in the related technology are separated from each other, which tends to increase network state congestion, cause a large number of packet loss phenomena, affect network performance, and thereby avoid the acceleration rate of a single user is too high. Over-use of network resources, affecting the stability and availability of the network, flexibly adjusting the data traffic distributed to users, and also flexibly adjusting user traffic under the network port when network ports may be congested, avoiding network congestion. Preferably, after the network service control device initiates the control policy adjustment request to the CDN service node according to the obtained current network state information, the network service control device may further include the following steps: Step S1: The CDN service node obtains the identification information of the user from the control policy adjustment request, and the network service control device indicates the control policy information adopted by the CDN service node. Step S2: The CDN service node according to the obtained identification information and the network service control device indication The control policy information adopted by the CDN service node adjusts the current control policy adopted by the user. Preferably, in step S104, before the network service control device initiates the control policy adjustment request to the CDN service node according to the obtained current network state information, the network service control device may further include the following operations: Step S3: The CDN system starts the domain name service DNS on the network service control device. Thereafter, the user's DNS resolution request is obtained; in a preferred embodiment, the network service control device enables the DNS service as a local DNS resolver of the user, facilitating the allocation of the CDN service node and the implementation of the load balancing policy. Step S4: The CDN system locates the user to the network service control device according to the DNS resolution request. Step S5: The CDN system determines the CDN service node that controls the user according to the preset correspondence between the CDN service node and the network service control device. In a preferred embodiment, the network service control device turns on the DNS service as the user's local DNS resolver. The user needs to access the application and initiate an application access request. The application system uses a CDN service to redirect user access to the CDN system. The CDN system determines the CDN service node that provides the service to the user according to the scheduling policy, and returns the analysis result to the local DNS server. The local DNS server returns the DNS resolution result to the client user, and the client user obtains the CDN service node information according to the DNS resolution result, and establishes an application connection with the CDN service node. The user accesses the application content, and the CDN service node provides the user with the required content. If the content is stored in the local cache, it is directly distributed to the client; if the content is not stored in the local cache, it needs to be obtained from the ISP application server. And then distribute it to the user. When the CDN service node performs content distribution to the user, the application is accelerated to the user, so that the content distribution is faster. After the user obtains the application acceleration, in the process of using the service, the user application acceleration policy in the CDN system can be controlled and adjusted according to the established policy to control the content distribution rate of the specific user, so as to optimize the network bandwidth and maintain the network stability. Sex, the purpose of protecting the user's business experience. In a preferred embodiment, the CDN system may configure a corresponding policy in its CDN central management system, designating a specific CDN service node to serve a specific one or more network service control devices to form a correspondence relationship; and synchronizing the above correspondences To the network management system, the network management system configures the corresponding relationship to the specific network. Network service control device. A policy control and adjustment interface is provided between the network service control device and the CDN service node, and the policy information can be applied for and negotiated. The above preferred implementation process will be further described below in conjunction with the preferred embodiment illustrated in FIG. 2. 2 is a flow diagram of a user application carrying a service interaction in accordance with a preferred embodiment of the present invention. As shown in FIG. 2, in the process of user service bearer, the systems and devices involved may include: a client, a network service control device, a CDN service node, a CDN center management system/DNS/GSLB, a DNS root server, and an ISP authorized DNS. Server and ISP application server. The process may include the following steps: Step S202: Before the user initiates the access, that is, during network deployment, the DNS service is enabled on the network service control device as the local DNS resolver of the user. When the DNS of the subsequent CDN center performs the load balancing policy, load balancing is performed according to the local DNS resolver that is enabled on the network service control device. Determining a CDN service node that provides a service to the user in accordance with a pre-established policy; Step S204: The user needs to access the application, and initiates a DNS resolution request; Step S206: The network service control device receives the DNS resolution request of the user, and has no corresponding cache in the query. In the case of the record, the upper DNS query is up to the root DNS server; Step S208: The root DNS server returns the authorized DNS server information of the ISP corresponding to the domain name to the local DNS; Step S210: The local DNS resolver returns the ISP according to the root DNS Authorizing the DNS server information, authorizing the DNS server to initiate a DNS query request to the ISP; Step S212: The ISP adopts the CDN service, and thus, when the authorized DNS server of the ISP receives the DNS query request, returns the DNS information of the CDN system to the local DNS resolver. Step S214: The DNS local resolver receives the DNS information of the CDN system returned by the ISP authorized DNS, and initiates a DNS query request to the DNS server of the CDN system; Step S216: The DNS GSLB of the CDN central system receives the DNS query request according to the predetermined policy. Determine the CDN service node that provides services for the user, and make the service address of the CDN service node. DNS resolution result is returned to the local DNS resolver; Step S218: the local DNS resolver on the network traffic control apparatus receives center system DNS GSLB CDN DNS resolution result is returned to the client returns the user; Step S220: The client obtains the information of the CDN service node according to the result of the DNS resolution, establishes an application link with the CDN service node, and accesses the application. Step S222: The CDN service node receives the content access request of the user, and queries the local cache, for example, the local cache has been cached. Corresponding content, directly distributed to the user, otherwise need to obtain from the source station; Step S224: In the case that the CDN service node does not cache the content required by the user locally, the CDN service node requests the corresponding content from the application server of the ISP; S226: The application server of the ISP receives the content request of the CDN service node, and returns the corresponding content to the CDN service node. Step S228 to step S230: the CDN service node performs content distribution to the user, and returns content required by the user; At the same time, in order to improve the user's business experience, accelerated distribution can be performed to increase the rate of distribution; P2SP distribution technology can be used to implement fast content distribution; Step S232: The user continues to access the content, and after the content access is finished, the link is closed. In the preferred embodiment, the service bearer process is characterized in that the DNS service opened by the network service control device is used as the local DNS resolver of the user, so that the DNS GSLB of the CDN system can perform local DNS resolution and load sharing according to the local The DNS resolver corresponds to the corresponding network service control device, and corresponding to the correspondence between the preset CDN service node and the network service control device, and determines the CDN service node for the user. Preferably, in step S2, after the CDN serving node adjusts the current control policy adopted by the CDN serving node according to the obtained identification information and the control policy information that the network service control device instructs the CDN serving node to adopt, the The following steps are performed: Step S6: The CDN service node feeds back the adjustment result to the network service control device. In a preferred implementation process, the foregoing current network status information may include, but is not limited to, at least one of the following:

(1) a network download rate of one or more users corresponding to a preset port in the network service control device; for example: a download rate of a current network connection of one or more users corresponding to a preset port in the network service control device 60M/s;

(2) The application download rate of one or more users corresponding to the preset port in the network service control device: For example: the current application download rate of one or more users corresponding to the preset port in the network service control device is 50M/s (3) The current bandwidth utilization of the preset port in the network service control device; for example, the bandwidth utilization rate of the preset port in the network service control device is 90%;

(4) A packet loss rate when one or more users corresponding to the preset port in the network service control device perform service data stream transmission; for example: one or more users corresponding to preset ports in the network service control device The packet loss rate when performing service data stream transmission is 10%;

(5) receiving, by the one or more users corresponding to the preset port in the network service control device, a network delay of the service data flow; for example, receiving one or more users corresponding to the preset port in the network service control device The network delay of the data stream is 2S. In a preferred implementation process, the CDN serving node may adjust, if not limited to, at least one of the following: the processing mode 1: the application download rate of the one or more users corresponding to the preset port is less than When the first preset threshold (5 M/s), the CDN serving node increases the download rate of a preset number of users of one user or multiple users corresponding to the preset port; one or more users corresponding to the preset port When the download rate is greater than the second preset threshold (50M/S), the CDN serving node reduces the download rate of a preset number of users of one user or multiple users corresponding to the preset port; the network service control device monitors the current user in real time. The application download rate (ie, the statistical value of the preset interval, non-instantaneous value), if the predetermined threshold is exceeded, the specific user or preset corresponding to the preset port is controlled and adjusted by the policy with the CDN serving node. A predetermined number of users among the corresponding users of the port (for example: there are 100 users under the current port A, you can adjust this 1 only) 00 users whose application download rate is ranked in the top 10) request application deceleration; if lower than the predetermined threshold, pass the policy control and adjustment interface with the CDN service node, for the specific user corresponding to the preset port or A predetermined number of users among the plurality of users corresponding to the preset port request application acceleration. The processing mode is as follows: when the current bandwidth usage of the preset port is greater than the third preset threshold, the CDN serving node reduces the download rate of a preset number of users of one user or multiple users corresponding to the preset port; The device monitors the port bandwidth utilization in real time (that is, the statistical value of the preset interval instead of the instantaneous value). If the bandwidth utilization is greater than the predetermined threshold, the policy is controlled and adjusted with the CDN serving node to be specific to the port. The user or a predetermined number of users among the users under the port (for example, there are 100 users under the current port A, and only the users whose application download rate is ranked in the top 10 among the 100 users) can be requested to request the application to slow down. The processing mode is as follows: when the packet loss rate of the one or more users corresponding to the preset port is greater than the fourth preset threshold, the CDN serving node reduces one user or multiple users corresponding to the preset port. The download rate of the preset number of users; the network service control device monitors the packet loss rate (that is, the statistical value of the preset interval, rather than the instantaneous value) when the service data stream is transmitted in real time, and if the packet loss rate is greater than a predetermined threshold, The policy control and adjustment interface with the CDN service node requests the application to decelerate for a preset number of users of one user or multiple users corresponding to the preset port. The processing mode is as follows: when the network delay of the one or more users corresponding to the preset port receives the service data flow is greater than the fifth preset threshold, the CDN serving node reduces the pre-selection of the specific user or the plurality of users corresponding to the preset port. Set the download rate of the number of users. The network service control device monitors the network delay of the user receiving the service data stream in real time (that is, the statistical value of the preset interval, rather than the instantaneous value), and if the network delay is greater than the predetermined threshold, the policy control and adjustment between the CDN service node and the CDN is performed. The interface requests the application to decelerate for a specific user corresponding to the preset port or a preset number of users of the plurality of users. The processing mode is as follows: when the network download rate of one or more users corresponding to the preset port is greater than a sixth preset threshold, the CDN serving node reduces a preset number of users of one user or multiple users corresponding to the preset port. Download rate. The above preferred implementation process will be further described below in conjunction with the preferred embodiment illustrated in FIG. 3 is a flow chart of a method of adjusting a user application acceleration policy in accordance with a preferred embodiment of the present invention. As shown in FIG. 3, the specific implementation process may include the following steps: Step S302: The network service control device may initiate an application acceleration policy adjustment for the user to the CDN service node according to the network status. First, the corresponding control and adjustment policies need to be deployed on the network service control device. The specific policy can be customized according to requirements. In the preferred embodiment, the following assumptions are made (the following parameters are all interval statistics): Policy 1 If the bandwidth utilization of the port is up to % (assumed: A%=90%), the corresponding application acceleration adjustment policy is triggered, and the application is decelerated to avoid port congestion. Policy 2: The download rate of the current network connection of the user reaches B bit/s. (Assume: B=60M), trigger the application acceleration adjustment policy for the user, request the application to slow down, and avoid the single user rate is too high; Strategy 3: The user's current accelerated application download rate has reached C bit/s (assumed: C=50M), triggering an application acceleration adjustment policy for the user, requesting application deceleration, avoiding a single user rate being too high; Strategy 4, User The current accelerated application download rate is lower than D bit/s (assumed: D=5M), indicating that the user's application acceleration effect is not obvious, triggering application acceleration policy adjustment for the user, requesting application acceleration, and improving user application. After the deployment of the foregoing control policy, the network service control device can monitor and adjust the corresponding state according to the policy in real time, and control and adjust the application acceleration policy of the user. The specific implementation process is as follows: Case 1: Based on network bandwidth utilization The rate adjustment method is as follows: Step S3041: The network service control device monitors the bandwidth utilization of the user port in real time. If the bandwidth utilization of the port reaches the threshold of 8%, the user application acceleration policy on the port needs to be adjusted to reduce Bandwidth utilization of the port; The user's accelerated application download rate is sorted by the user. The user with the download rate Top N (assumed N=100) is reported to the CDN system, and the CDN system is applied to adjust the application acceleration policies for these users to adjust the content of these users. Distributing the rate; avoiding the acceleration being too fast, causing the network port to be congested; Step S3042: The CDN system receives the application acceleration policy adjustment request for the user sent by the network service control device, and obtains the user who needs to implement the policy adjustment according to the content in the request message. Information; Perform user-based application acceleration policy adjustment within the CDN system, adjust the user's content distribution rate, and feed back the results of the policy execution to the network service control device. After the user's policy is normally executed, the CDN system feeds back the execution success message to the network service control device; if an exception occurs during the policy execution, the execution failure message is fed back. Case 2: The method for adjusting the download rate based on the current network connection of the user is as follows: Step S3043: The network service control device monitors the download rate of the current network connection of the user in real time, if the download rate of the current network connection of the user reaches the threshold of B bit/s And triggering the application acceleration policy adjustment to the user, sending an application deceleration request to the CDN system, adjusting the application acceleration policy of the user in the CDN system, and reducing the content distribution rate of the user; Step S3044: The CDN system receives the network service Controlling an application deceleration request sent by the device, obtaining user information that needs to be decelerated according to the content in the request message, performing user-based application deceleration in the CDN system, reducing the content distribution rate of the user, and Result of execution to the network Business control device feedback. After the user's policy is normally executed, the CDN system feeds back the execution success message to the network service control device; if an exception occurs during the policy execution, the execution failure message is fed back. Case 3: The application deceleration method based on the download rate of the user currently accelerating the application is as follows: Step S3045: The network service control device monitors the download rate of the currently accelerated application of the user in real time (may be based on but not limited to {CDN service address one> user client address) If the download rate of the currently accelerated application reaches the C bit/s threshold, the application acceleration policy adjustment for the user is triggered, and the deceleration request for the user application is sent to the CDN system, and the adjustment is performed. The application acceleration policy of the user in the CDN system reduces the content distribution rate of the user; Step S3046: The CDN system receives the application deceleration request sent by the network service control device for the user, and obtains the content according to the content in the request message. The application deceleration user information is implemented, the user-based application deceleration is performed inside the CDN system, the content distribution rate of the user is reduced, and the result of the policy execution is fed back to the network service control device. After the user's policy is normally executed, the CDN system feeds back the execution success message to the network service control device; if an exception occurs during the policy execution, the execution failure message is fed back. Case 4: The application acceleration method based on the download rate of the user currently accelerating the application is as follows: Step S3047: The network service control device monitors the download rate of the currently accelerated application of the user in real time, if the download rate of the current accelerated application of the user is lower than D bit/s The threshold triggers the application acceleration policy adjustment for the user, sends an acceleration request for the user to the CDN system, adjusts the application acceleration policy for the user in the CDN system, and improves the content distribution rate for the user; Step S3048: CDN system Receiving an application acceleration request sent by the network service control device for the user, obtaining user information that needs to implement application acceleration according to the content in the request message, performing user-based application acceleration in the CDN system, and improving the content distribution rate of the user And feedback the results of the policy execution to the network service control device. After the user's policy is normally executed, the CDN system feeds back the execution success message to the network service control device; if an exception occurs during the policy execution, the execution failure message is fed back. In the preferred embodiment, a policy control and negotiation interface is established between the network service control device and the CDN service node, so that after the network service control device detects an event that meets the predetermined policy, the network service control device can initiate a pair to the CDN service node through the interface. The user's application acceleration policy adjusts the request and interacts. In addition, the network service control device has the capability of triggering an application acceleration policy adjustment request to the user according to the network port traffic status, the user network connection download rate, and the current application download rate. 4 is a structural block diagram of an adjustment system of a control strategy according to an embodiment of the present invention. As shown in FIG. 4, the adjustment system of the control policy may include: a network service control device 10; the network service control device 10 may include: a first acquisition module 100 configured to acquire current network state information; and a request module 102, configured to The obtained current network state information initiates a control policy adjustment request to the CDN service node, where the control policy adjustment request is used to request the CDN service node to adjust the data traffic distributed to the user. The method shown in FIG. 4 solves the problem that the CDN system and the communication network in the related art are separated from each other, which tends to increase network state congestion, cause a large number of packet loss phenomena, affect network performance, and thereby avoid the acceleration rate of a single user. High, excessive use of network resources, affecting the stability and availability of the network, flexible adjustment of data traffic distributed to users, and flexible adjustment of user traffic under the network port when network ports may be congested, to avoid Network congestion. Preferably, as shown in FIG. 5, the system may further include: a CDN service node 20; the CDN service node includes: a second obtaining module 200, configured to acquire user identification information and a network service control device indication from the control policy adjustment request The control policy information adopted by the CDN service node; the adjustment module 202 is configured to adjust the current control policy adopted by the user according to the obtained identification information and the network policy control device instructing the control policy information adopted by the CDN service node. Preferably, as shown in FIG. 5, the system may further include: a CDN system 30. The CDN system 30 may include: a third obtaining module 300, configured to obtain a DNS resolution request of the user after the network service control device starts the domain name service DNS. The positioning module 302 is configured to locate the user to the network service control device according to the DNS resolution request, and the determining module 304 is configured to determine the CDN service for controlling the user according to the preset correspondence between the CDN service node and the network service control device. node. Preferably, as shown in FIG. 5, the CDN service node 20 may further include: a feedback module 204, configured to feed back the adjustment result to the network service control device. The above preferred implementation process will be further described below in conjunction with the preferred embodiment illustrated in FIGS. 6 and 7. 6 is a schematic diagram of an overall deployment of a CDN system and a network device in accordance with a preferred embodiment of the present invention. As shown in Figure 6, in a specific network deployment process, the network service control device is responsible for the control point of the user's network connection, providing network access and bearer control for the user; in the above network, the backbone router provides network convergence and Interconnection, where multiple network service control devices are connected at the backbone layer to form a networking relationship. The CDN system can be divided into a CDN central management system and a CDN service node. The CDN central management system is responsible for managing, maintaining, controlling, and scheduling CDN service nodes throughout the network. The CDN central management system also includes components such as DNS, Service Load Balancing System (GSLB); CDN service nodes are responsible for providing content distribution services for users; CDN The central management system/DNS/GSLB is usually deployed in a centralized manner, while the CDN service node can be distributed in a hierarchical manner, connected to the network service control device, or connected to the backbone router. 7 is a schematic diagram of an allocation policy deployment of a CDN service node in accordance with a preferred embodiment of the present invention. As shown in Figure 7, the application acceleration policy of the user in the CDN system needs to be adjusted according to the network status; therefore, the network service control device needs to interact with the CDN service node and negotiate and adjust the policy, which requires the network service control device. A certain correspondence between the CDN service node and the CDN service node facilitates information interaction. In the preferred embodiment, there are four network service control devices in the network, namely: network service control device A, network service control device B, network service control device C, and network service control device D; and there are two CDN services. The nodes are respectively: CDN service node A and CDN service node B; wherein CDN service node A has a direct link with network service control device A, which is suitable for directly providing service for network service control device A; network service control device B, The network service control device C and the network service control device D have no directly connected CDN service nodes. To avoid the flow of traffic, it is more suitable to use the CDN service node B to provide services. It can be seen that the corresponding allocation policy can be deployed in the CDN central management system. The configuration strategy is: CDN service node A provides content distribution service for users under network service control device A; CDN service node B is network service control device B, The network service control device C and the user under the network service control device D provide a content distribution service; when performing service redirection and load sharing, the content distribution node is selected for the user according to the above policy. After the CDN central management system configures the allocation policy, it needs to notify the network service control device, so that the network service control device has a clear interactive CDN service node when it needs to negotiate and adjust the CDN user application acceleration policy to the CDN service node. The configuration of the network service control device needs to be completed by the network management system. Therefore, the CDN central management system needs to increase the interaction interface with the network management system, and synchronize the allocation policy of the CDN service node, the correspondence between the CDN service node and the network service control device. Go to the network management system. The network management system configures the network service control device through the network management interface, and specifies the corresponding CDN service node. From the above description, it can be seen that the above embodiments achieve the following technical effects (it is required that these effects are effects that can be achieved by some preferred embodiments): The present invention provides a CDN system based on network state information. The method for adjusting the user application acceleration policy may trigger the adjustment user according to the network status information such as the traffic status of the network port where the user is located, the download rate of the user network connection, the download rate of the current application of the user, and the traffic usage of the current network connection of the user. Application acceleration strategy. Initiating a policy adjustment request by using a policy negotiation and control interface between the network service control device and the CDN service node, requesting to adjust a user application acceleration policy in the CDN system, thereby adjusting a CDN distribution rate of the user content, thereby implementing adjustment of network traffic; This avoids the problem that the CDN system cannot sense the network status, the single user traffic is too high, and the network port is congested when the user distributes the content. The network state-based flow control mechanism suppresses the traffic from the source. Effectively avoid the waste of network bandwidth and network congestion, optimize the performance of the network, and ensure the user's business experience. Industrial Applicability As described above, a request method and system for controlling policy adjustment provided by an embodiment of the present invention have the following beneficial effects: Avoiding a single user traffic caused by a user's application content distribution due to the inability of the CDN system to perceive the network state High network port congestion, etc. The network state-based flow control mechanism suppresses traffic from the source, which effectively avoids network bandwidth waste and network congestion, optimizes network performance, and ensures user service experience. . Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A method of adjusting a control strategy, including:

The network service control device acquires current network status information;

And the network service control device initiates a control policy adjustment request to the content distribution network CDN service node according to the obtained current network state information, where the control policy adjustment request is used to request the CDN service node to adjust the distribution to the user. Data Flow.

The method according to claim 1, wherein, after the network service control device initiates the control policy adjustment request to the CDN serving node according to the obtained current network state information, the method further includes:

Obtaining, by the CDN serving node, the identifier information of the user from the control policy adjustment request, and the network service control device instructing the control policy information adopted by the CDN serving node; the CDN service node according to the obtained The identification information and the network service control device instruct the control policy information adopted by the CDN service node to adjust a control policy currently adopted by the user.

The method according to claim 1, wherein before the network service control device initiates the control policy adjustment request to the CDN serving node according to the obtained current network state information, the method further includes:

After the network service control device starts the domain name service DNS, the CDN system obtains the DNS resolution request of the user;

The CDN system locates the user to the network service control device according to the DNS resolution request;

The CDN system determines a CDN service node that controls the user according to a preset correspondence between the CDN service node and the network service control device.

The method according to claim 2, wherein the CDN serving node adopts the preset according to the acquired identification information and the network service control device instructing the control policy information adopted by the CDN serving node After the adjustment policy adjusts the current control strategy adopted by the user, the adjustment policy further includes:

The CDN serving node feeds back the adjustment result to the network service control device.

The method according to any one of claims 1 to 4, wherein the current network status information comprises at least one of the following:

a network download rate of one or more users corresponding to a preset port in the network service control device;

An application download rate of one or more users corresponding to the preset port in the network service control device;

The current network bandwidth utilization of the preset port in the network service control device; the loss of the service data stream when one or more users corresponding to the preset port in the network service control device perform traffic data transmission Packet rate

And receiving, by the one or more users corresponding to the preset port in the network service control device, a network delay of the service data flow.

The method according to claim 5, wherein the adjusting, by the CDN serving node, the control policy currently adopted by the user comprises at least one of the following:

When the application download rate of the one or more users corresponding to the preset port is less than the first preset threshold, the CDN serving node increases a preset quantity of one user or multiple users corresponding to the preset port. The download rate of the user is: when the application download rate of the one or more users corresponding to the preset port is greater than a second preset threshold, the CDN serving node lowers one user or more corresponding to the preset port The download rate of the preset number of users among the users;

When the current bandwidth utilization of the preset port is greater than a third preset threshold, the CDN serving node reduces a download rate of the preset number of users in one user or multiple users corresponding to the preset port;

When the packet loss rate of the one or more users corresponding to the preset port is greater than the fourth preset threshold, the CDN serving node reduces one user or more corresponding to the preset port. The download rate of the preset number of users among the users;

When the network delay of the one or more users corresponding to the preset port receives the service data flow is greater than a fifth preset threshold, the CDN serving node reduces one user or multiple users corresponding to the preset port. The download rate of the preset number of users;

When the network download rate of the one or more users corresponding to the preset port is greater than a sixth preset threshold, the CDN serving node reduces the pre-predicted by one user or multiple users corresponding to the preset port. Set the download rate of the number of users. A control system adjustment system includes: a network service control device;

The network service control device includes:

The first obtaining module is configured to obtain current network state information;

a requesting module, configured to initiate a control policy adjustment request to the content distribution network CDN serving node according to the obtained current network state information, where the control policy adjustment request is used to request the CDN service node to adjust data distributed to the user flow. The system according to claim 7, wherein the system further comprises: the CDN service node; the CDN service node comprises:

a second obtaining module, configured to obtain, from the control policy adjustment request, identifier information of the user, and the network service control device instructs the CDN service node to adopt control policy information; and the adjusting module is configured to be obtained according to the obtained The identification information and the network service control device instruct the control policy information adopted by the CDN service node to adjust a control policy currently adopted by the user. The system according to claim 7, wherein the system further comprises: a CDN system;

The CDN system includes:

a third obtaining module, configured to obtain a DNS resolution request of the user after the network service control device starts the domain name service DNS;

a positioning module, configured to locate the user to the network service control device according to the DNS resolution request;

The determining module is configured to determine a CDN serving node that controls the user according to a preset correspondence between the CDN service node and the network service control device. The system of claim 8, wherein the CDN service node further comprises:

The feedback module is configured to feed back the adjustment result to the network service control device.