WO2010124550A1

WO2010124550A1 - Content delivery method and device and content delivery network system

Info

Publication number: WO2010124550A1
Application number: PCT/CN2010/071582
Authority: WO
Inventors: 黄卉
Original assignee: 华为技术有限公司
Priority date: 2009-04-30
Filing date: 2010-04-07
Publication date: 2010-11-04
Also published as: CN101540775B; CN101540775A

Abstract

The embodiment of the invention discloses a content delivery method and device and a content delivery network system. Wherein, the content delivery method includes: receiving a content delivery request including the information of contents requested to be delivered; sending a query request including the information of contents requested to be delivered to a top content delivery network controller (TOP-CDNC); receiving target content delivery network (CDN) related information returned from the TOP-CDNC; and requesting the target CDN to process the content delivery request. The embodiments of the invention can avoid multilevel forwarding, and even cycle forwarding of content delivery requests which can not be processed, thus effectively saving processing time of user content delivery requests and enabling timely return of response messages to users, thereby improving the quality of service of the CDN.

Description

Content distribution method, device and content distribution network system The application is submitted to the Chinese Patent Office on April 30, 2009, and the application number is

200910138527.X, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the the the TECHNICAL FIELD The present invention relates to communication technologies, and more particularly to a content distribution method, apparatus, and content distribution network system. Background technique

The Content Delivery Network (CNN) technology is a technology developed to improve the Quality of Service (QoS) of the Internet. Through the optimal deployment of content, the user's near access to content and intelligent traffic distribution of network traffic are realized, which comprehensively solves the influence of factors such as small network bandwidth, large user access, and uneven distribution of network points on user access effects, and greatly improves the network. The speed of response.

The principle of CDN technology is: distributed media servers are distributed in the network, so that the media content provided by the content provider can be pushed from the backbone of the network to the "edge" of the network closest to the user according to the established distribution policy, for example. : Pushed to the "edge" media server, so that when users access the media content, they can get a quick response from the nearest "edge", the media server, thereby reducing the impact of media content transmission delay, network jitter and other factors on the access effect. Users provide an orderly and high-quality service that enables users to get the information they need from the network closest to the user as quickly as possible. CDN technology greatly eases Internet congestion and enables websites to provide more There are many media content services such as video programs, song-on-demand and other data traffic.

FIG. 1 is a schematic diagram of a network structure of a prior art CDN. As shown in Figure 1, each CDN includes a CDN Controller (CDN Controller, hereinafter referred to as CDNC), with more than one logic. The associated cluster, for example: A geographically associated cluster. Each cluster includes a cluster controller (Cluster Controller, hereinafter referred to as CC), and more than one logically associated content delivery function entity (CFD), for example: geographical location, storage capacity related Associated CDF. The CDF is also a media server, which is mainly responsible for storing media content and distributing media content to users; CC is mainly responsible for managing resources in the cluster, including the distribution of decision media content within the cluster, monitoring the status of the CDF, and providing media content distribution for decision making. The CDF of the service; CDNC is the control center within the CDN, which mainly controls the distribution of media content in each cluster within the CDN, and the clusters that decide to provide services to users.

When the media content is more complicated, it is often necessary to form a large-scale CDN by a plurality of CDNs to provide services to users. The large-scale CDN is also called a total CDN. In this large-scale content distribution network, each CDN serves as a sub-CDN, and its internal content distribution is controlled by the CDNC. For an application system (hereinafter referred to as AS) that requires a CDN, for example, Internet Protocol TV (hereinafter referred to as IPTV) AS, content on demand (hereinafter referred to as COD) AS, etc. A default subCDN. When the AS sends a content distribution request, the content distribution request is first sent to the CDNC in the default sub-CDN, and when the CDNC in the default CDN cannot provide the service, the content distribution request is forwarded to the other sub-CDN. The CDNC's CDNC processing, if the CDNC processing still fails to provide the service, continues to forward the content distribution request to the CDNC processing of the other sub-CDNs in the total CDN, and so on, and may occur in the total CDN for cyclic forwarding of the content distribution request.

In the process of implementing the present invention, the inventors have found that the existing CDN provides a content distribution service to a user with at least the following problems:

If the sub-CDN that receives the content distribution request does not store the media content requested by the user, or the load is too high to process the content distribution request, the multi-level forwarding or even the round-trip forwarding of the content distribution request may be caused, thereby increasing the processing user. The time of the content distribution request, even the infinite extension of the time for processing the user content distribution request, especially in the case where the total number of sub-CDNs included in the total CDN is large, the response message cannot be returned to the user within an acceptable time, and P is contending. CDN's quality of service. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a content distribution method, a device, and a content distribution network system, so as to shorten the time for processing a user content distribution request and improve the service quality of the CDN.

A content distribution processing method provided by an embodiment of the present invention includes:

Receiving a content distribution request, the content distribution request includes content information requesting distribution; sending a query request to the top-level content distribution network control unit TOP-CDNC, where the query request includes the content information of the request distribution;

Receiving information related to the target CDN returned by the TOP-CDNC;

The target CDN is requested to process the content distribution request.

A content distribution apparatus provided by an embodiment of the present invention includes:

a first receiving module, configured to receive a content distribution request, where the content distribution request includes content information for requesting distribution, and receiving target CDN related information returned by the TOP-CDNC; and a first sending module, configured to send to the TOP-CDNC Query request, the query request includes content information of the request distribution;

And a request processing module, configured to request the target CDN to process the content distribution request according to the target CDN related information.

According to the content distribution method and apparatus provided by the above embodiment of the present invention, a query request may be sent to the TOP-CDNC, and the target CDN related information for processing the content distribution request is acquired from the TOP-CDNC, and the target CDN is directly requested to process the content distribution request. Compared with the prior art, it avoids the multi-level forwarding or even the round-trip forwarding when the content distribution request cannot be processed, effectively saves the time for processing the user content distribution request, and can return a response message to the user in time, thereby improving the CDN. Quality of service.

A method for selecting a target content distribution network according to an embodiment of the present invention includes: receiving a query request sent by a source CDN, where the query request includes a user terminal requesting distribution Content information;

Selecting a target CDN for distributing the content to the user terminal according to CDN information distributing the content;

The target CDN information is transmitted to the source CDN.

A target content distribution network selecting apparatus according to an embodiment of the present invention includes: a third receiving module, configured to receive a query request sent by a source CDN, where the query request includes content information that the user terminal requests to distribute;

a storage module, configured to store CDN information for distributing each content;

An acquiring module, configured to obtain, from the storage module, CDN information that distributes the content; a second selecting module, configured to select, according to CDN information that distributes the content, a target CDN that distributes the content to the user terminal;

And a second sending module, configured to send the target CDN information to the source CDN.

Another method for selecting a target content distribution network according to an embodiment of the present invention includes: receiving a query request sent by a source CDN, where the query request includes content information that the user terminal requests to distribute;

The target CDN information distributing the content is transmitted to the source CDN such that the source CDN selects to distribute the target CDN of the content to the user terminal.

Another target content distribution network selecting apparatus provided by the embodiment of the present invention includes: a third receiving module, configured to receive a query request sent by a source CDN, where the query request includes content information that the user terminal requests to distribute;

An acquiring module, configured to acquire, from the storage module, CDN information that distributes the content; and a third sending module, configured to send, to the source CDN, target CDN information that distributes the content, so that the source CDN selects a location The user terminal distributes the target CDN of the content.

A content distribution network system provided by an embodiment of the present invention includes a TOP-CDNC and a plurality of CDNs, and a source CDN of the plurality of CDNs is configured to receive a content distribution request, where The content distribution request includes content information requesting distribution; sending a query request to the TOP-CDNC, the content distribution request including content information of the request distribution; and receiving target CDN information returned by the TOP-CDNC; Determining the target CDN, requesting the target CDN to process the content distribution request;

The TOP-CDNC is configured to store CDN information for distributing each content; receiving the query request to obtain CDN information that distributes the content; and the CDN information distributing the content is selected to distribute the content to the user terminal Target CDN; and transmitting the target CDN information to the source CDN.

Another content distribution network system provided by an embodiment of the present invention includes a TOP-CDNC and a plurality of CDNs, wherein the source CDNs of the plurality of CDNs are used to receive a content distribution request, where the content distribution request includes content requested for distribution. Sending a query request to the TOP-CDNC, the content distribution request including the content information of the request distribution; and receiving CDN information of the content distributed by the TOP-CDNC; according to the CDN distributing the content Information, selecting a target CDN for processing the content distribution request; and requesting the target CDN to process the content distribution request according to the target CDN information;

The TOP-CDNC is configured to store CDN information for distributing the content; receiving the query request, obtaining CDN information for distributing the content; and transmitting CDN information for distributing the content to the source CDN.

The target content distribution network selection method and apparatus and the content distribution network system provided by the above-mentioned embodiments of the present invention, the TOP-CDNC can obtain the CDN related information for processing the content distribution request according to the CDN information of each content distribution, and send the information to the source. The CDN, in order to directly request the target CDN to process the content distribution request, avoids the multi-level forwarding or even the round-trip forwarding of the content distribution request when the source CDN cannot process the content distribution request, thereby effectively saving the processing of the user content. When the request is distributed, the response message can be returned to the user in time, thereby improving the quality of service of the CDN.

A method for selecting a source content distribution network according to an embodiment of the present invention includes:

Receiving a request message sent by the user terminal, where the request message includes user information; Determining a geographic attribute of the user according to the user information;

A CDN corresponding to the geographical attribute of the user is selected from the CDN system as a source CDN for processing a content distribution request transmitted by the user terminal.

A source content distribution network selecting apparatus provided by an embodiment of the present invention includes:

a second receiving module, configured to receive a request message sent by the user terminal, where the request message includes user information;

a determining module, configured to determine a geographic attribute of the user according to the user information; a first selecting module, configured to select, from the CDN system, a CDN corresponding to the geographic attribute of the user, to process the sending by the user terminal The source CDN of the content distribution request.

The source content distribution network selection and device provided by the foregoing embodiment of the present invention may determine a source CDN as a content distribution request sent by the user terminal according to the geographic attribute of the user, so that the source CDN can be processed as the default CDN. The content distribution request sent by the user terminal, TOP-CDNC only serves as the query center, instead of centrally processing the content distribution request by the TOP-CDNC, thereby greatly improving the performance of the CDN system and saving the round when the source CDN cannot process the content distribution request. Inquire about time and improve business processing efficiency. The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. DRAWINGS

1 is a schematic diagram of a network structure of a prior art CDN;

2 is a flow chart of an embodiment of a content distribution method according to the present invention;

3 is a schematic structural view of an embodiment of a CDN system according to the present invention;

4 is a flowchart of another embodiment of a content distribution processing method according to the present invention;

FIG. 5 is a flowchart of an application embodiment of a content distribution method according to the present invention; FIG.

6 is a flow chart of still another embodiment of a content distribution method according to the present invention;

7 is a flow chart of an embodiment of a source CDN selection method according to the present invention;

FIG. 8 is a flowchart of an embodiment of a target CDN selection method according to the present invention; FIG. 9 is a flowchart of another embodiment of a method for selecting a target CDN according to the present invention; FIG. 10 is a flowchart of an embodiment of generating CDN information of distributed content according to the present invention; FIG. 11 is a schematic structural diagram of an embodiment of a content distribution apparatus according to the present invention;

12 is a schematic structural diagram of another embodiment of a content distribution apparatus according to the present invention;

FIG. 13 is a schematic structural diagram of still another embodiment of a content distribution apparatus according to the present invention; FIG.

14 is a schematic structural view of an embodiment of a source CDN selection device according to the present invention; FIG. 15 is a schematic structural view of an embodiment of a target CDN selection device according to the present invention; 17 is a schematic structural diagram of still another embodiment of the target CDN selection device of the present invention; FIG. 18 is a schematic structural view of still another embodiment of the target CDN selection device of the present invention. detailed description

The embodiment of the present invention can directly select a target CDN that can process the content distribution request in the CDN system to process the content distribution request, thereby avoiding the situation that the source CDN cannot process the content distribution request, especially when the CDN is large. Multi-level forwarding or even round-robin forwarding of content distribution requests.

2 is a flow chart of an embodiment of a content distribution method of the present invention. As shown in FIG. 2, the content distribution method of this embodiment includes the following steps:

Step 101: Receive a content distribution request, where the content distribution request includes content information for requesting distribution, and further includes address information of a user equipment (User Equipment, hereinafter referred to as UE) requesting to distribute the content.

Step 102: Send a query request to the top-level CDN control unit (TOP-CDN Controller, hereinafter referred to as TOP-CDNC), where the query request includes content information requested for distribution.

As an embodiment of the present invention, a total CDN may be constituted by a plurality of CDNs, and a CDN system is constituted by the total CDN and TOP-CDNC. FIG. 3 is a schematic structural diagram of an embodiment of a CDN system according to the present invention. In the CDN system, TOP-CDNC can be accepted The content information stored in each CDN and the status information of the CDN are collected, and CDN information of each content is generated. In a plurality of CDNs, the CDN that processes the content distribution request by default is called a source CDN or a default CDN, and may be preset according to a certain rule.

Step 103: Receive the target CDN related information returned by the TOP-CDNC.

Specifically, the target CDN related information may be target CDN information for processing a content distribution request, wherein the target CDN is selected by the TOP-CDNC based on the CDN information distributing the content.

In addition, the target CDN related information may also be CDN information that distributes the content requested by the content distribution request. At this time, the target CDN for processing the content distribution request can be selected based on the CDN information distributing the content.

The target CDN information may specifically be the IP address information of the target CDN, the Media Access Control (MAC) address information, the routing information, and the like, all of which can locate the target CDN.

Step 104: The target CDN is requested to process the content distribution request according to the target CDN related information.

The embodiment shown in the above FIG. 2 of the present invention can be specifically implemented by the source CDN of the UE that transmits the content distribution request. When the source CDN processes the content distribution request sent by the UE, sends a query request to the TOP-CDNC, acquires the target CDN related information for processing the content distribution request from the TOP-CDNC, and directly selects a target CDN that can process the content distribution request, and Requesting the target CDN to process the content distribution request, thereby avoiding multi-level forwarding or even round-robining of the content distribution request when the content distribution request is processed, especially when the CDN is large, effectively saving polling for processing the user content distribution request. Time, the response message can be returned to the user in time, thereby improving the service quality of the CDN and improving the user experience.

In various embodiments of the invention, the CDN information of the distributed content may be the CDN storing the content and its status information. The CDN information storing the content may be the CDN information of the content and the content, or the correspondence relationship between the CDN and the content information stored by the CDN. Shape of CDN The status information includes the load and health status information of the CDN. After the source CDN receives the content distribution request, the CDF sends the requested content to the UE, which causes the CDF session request to increase, increasing the load of the cluster where the CDF is located. Thereby increasing the load of the CDN. The health status identifies whether the CDN is working properly. When the load of a CDN reaches the upper limit, the new content distribution request can no longer be processed, and the health status may change to a CDF exception.

In various embodiments of the present invention, the default CDN may also send a query request to the TOP-CDNC only when the content distribution request sent by the UE cannot be processed, so that the content distribution sent by the UE can be reduced in the default CDN itself. At the request time, the time required for the target CDN to process the content distribution request is requested, thereby saving the polling time for processing the user content distribution request, and the response message can be returned to the user in time, thereby improving the service quality of the CDN and improving the user experience.

4 is a flow chart of another embodiment of a content distribution processing method of the present invention. As shown in FIG. 4, the content distribution processing method of this embodiment includes the following steps:

Step 201: The source CDN receives a content distribution request, where the content distribution request includes content information for requesting distribution, and further includes UE address information for requesting distribution of the content.

Step 202: The source CDN sends a query request to the TOP-CDNC in the CDN system, where the query request includes content information requested by the content distribution request.

Step 203: Receive target CDN information selected and returned by the TOP-CDNC.

Step 204: The source CDN requests the corresponding target CDN to process the content distribution request according to the target CDN information.

As a specific embodiment, in step 204, the source CDN may forward the content distribution request to the target CDN. Specifically, the content distribution request may be redirected to the target CDN, or the content distribution request may be directly forwarded to the target. CDN; The target CDN processes the content distribution request, and distributes the content to the UE according to the content distribution request.

As another specific embodiment, in step 204, the source CDN may acquire the content requested for distribution by the content distribution request from the target CDN according to the target CDN information, and distribute the content to the UE according to the content distribution request. Based on the high degree of concurrency of user content distribution requests in large-capacity CDNs, in order to reduce the number of sessions processed by TOP-CDNC and avoid TOP-CDNC becoming a performance bottleneck of the entire CDN system, in the embodiment shown in FIG. 4, The centralization method processes the content distribution request from the UE, ie, the content distribution request is processed first by the source CDN as the default CDN, and the TOP-CDNC is only used as the query center. Rather than directly processing the content distribution request from the UE by TOP-CDNCC, the performance of the CDN system can be greatly improved, and the polling time when the source CDN cannot process the content distribution request can be further saved, and the business processing efficiency is improved.

FIG. 5 is a flowchart of an application embodiment of a content distribution processing method according to the present invention. This embodiment is a specific application of the embodiment shown in FIG. As shown in FIG. 5, the application embodiment includes the following steps:

Step 301: The COD AS receives a service request message sent by the user through the UE, and requests to acquire a certain content, where the service request message carries the UE address information.

Step 302: The COD AS acquires the home area corresponding to the user identifier, determines the source CDN that provides the service for the user, and returns the content acquisition address to the UE, that is, the IP address of the source CDNC, specifically, a uniform resource identifier. (Uniform Resource Indentifier, hereinafter referred to as: URI) Returns the acquisition address of the content to the UE.

Step 303: The UE sends a content distribution request to the source CDN according to the address information of the source CDN, where the content that the user requests to distribute and the UE address information are carried.

Step 304: The source CDN receives the content distribution request, and determines whether the content distribution request can be processed, for example, whether the content requested by the user and the status of the source CDN are normal. If the content distribution request can be processed, step 305 is performed. Otherwise, if the content distribution request cannot be processed, step 306 is performed.

Step 305: The source CDN returns a response message to the UE, and distributes the requested content to the UE. After that, the subsequent process of this embodiment is not executed.

Step 306: The source CDN sends a query request to the TOP-CDNC in the CDN system in which it is located, where the query request includes content information requested for distribution. Step 307: The TOP-CDNC selects a target CDN for processing the content distribution request according to the CDN information of the content requested to be distributed according to the distributed content distribution request, and transmits the address information of the target CDN to the source CDN.

Step 308: The source CDN sends a redirection request to the UE according to the address information of the target CDN, where the redirection request includes the address information of the target CDN, and requests the UE to redirect the content distribution request to the target CDN. In addition, the target CDN information carried in the redirect request may be other information than the address information of the target CDN, as long as the source CDN can send a message to the target CDN accordingly.

Step 309: The UE sends the content distribution request to the target CDN according to the address information of the target CDN of the redirect request.

Step 310: After receiving the content distribution request, the target CDN selects one of the CDFs according to a preset policy, and distributes the requested content to the UE.

6 is a flow chart of still another embodiment of a content distribution method of the present invention. As shown in FIG. 6, the content distribution processing method of this embodiment includes the following steps:

Step 401: The source CDN receives a content distribution request sent by the UE, where the content distribution request includes content information that is requested to be distributed and UE address information that requests the content to be distributed.

Step 402: The source CDN sends a query request to the TOP-CDNC in the CDN system, where the query request includes content information requested for distribution.

Step 403: The TOP-CDNC sends the CDN information of the content requested by the distributed content distribution request to the source CDN.

Step 404: The source CDN selects a target CDN for processing the content distribution request according to the CDN information of the content requested by the distributed content distribution request.

Step 405: The source CDN requests the target CDN to process the content distribution request.

Based on the high degree of concurrency of user content distribution requests in large-capacity CDNs, in order to reduce the number of sessions processed by TOP-CDNC and avoid TOP-CDNC becoming a performance bottleneck of the entire CDN system, in the embodiment shown in FIG. 6, take Centralization method to process content from UE The distribution request, ie: the content distribution request is processed by the default CDN, and TOP-CDNC is only used as the query center. Rather than directly processing the content distribution request from the UE directly by the TOP-CDNC, the performance of the CDN system is further greatly improved, the polling time when the source CDN cannot process the content distribution request is saved, and the business processing efficiency is improved.

As a specific embodiment, in step 405, the source CDN may forward the content distribution request to the target CDN. Specifically, the content distribution request may be redirected to the target CDN, or the content distribution request may be directly forwarded to the target. CDN; The target CDN processes the content distribution request, and distributes the content to the UE according to the content distribution request.

As another specific embodiment, in step 405, the source CDN may acquire the content requested for distribution by the content distribution request from the target CDN according to the target CDN information, and distribute the content to the UE according to the content distribution request.

Further, as an embodiment of the present invention, in step 204 and step 405, after the source CDN obtains the content requested by the content distribution request from the target CDN, the content acquired by the source CDN may be cached and sent to the TOP-CDNC. The first update request is sent, requesting the TOP-CDNC to update the CDN information distributing the content it has acquired. In one embodiment of the present invention, the CDN information of the distributed content includes: a CDN storing the content and its status information. Similarly, when the source CDN or the target CDN distributes its requested content to the UE, or after distributing its requested content to the UE, it may also send a second update request to the TOP-CDNC requesting the TOP-CDNC to update the source CDN or the target CDN. The status information for subsequent processes, TOP-CDNC more precisely selects the target CDN for processing the content distribution request based on the CDN and its status information that distributes the content.

As an embodiment of the present invention, the default CDN may be selected using a principle consistent with the CDN division as a source CDN for processing a content distribution request sent by a certain UE by default. For example: CDN is usually divided according to geographical attributes, that is, some geographically adjacent clusters serving users in the same area are divided into one CDN. In this way, when the default CDN is selected, it can be based on user information, for example: the user's internet protocol (Internet protocol, The following is abbreviated as: IP) address or registration information to determine its home zone, thereby determining the CDN in the home zone or the CDN as the default CDN for providing services. When the default CDN is specifically determined, the registration server when the service registration service is provided to the user may be determined, or the application system that provides the service service to the user, for example, an IPTV AS, a COD AS, or the like.

FIG. 7 is a flowchart of an embodiment of a source CDN selection method according to the present invention. As shown in FIG. 7, the embodiment includes the following steps:

Step 501: Receive a request message sent by the UE, where the request message includes user information. Specifically, the request message may be a registration request message or a service request message, or may be other messages.

Step 502: Determine, according to the correspondence between the user information and the regional attribute, the geographic attribute of the user corresponding to the user information in the request message.

Step 503: Select a CDN corresponding to the determined geographical attribute of the user from the CDN system as a source CDN for processing the content distribution request sent by the UE UE.

Determining the geographic attribute of the user according to the user information, and selecting a CDN corresponding to the regional attribute as the source CDN for processing the content distribution request sent by the UE, so that the near processing of the content distribution request can be implemented, and the source CDN cannot be saved. The polling time when processing content distribution requests improves the efficiency of business processing.

Figure 8 is a flow chart of an embodiment of a target CDN selection method of the present invention. As shown in FIG. 8, the target CDN selection method of this embodiment includes the following steps:

Step 601: Receive a query request sent by the source CDN, where the query request includes content information that the UE requests to distribute.

Step 602: Select, according to the CDN information of the content that the distribution UE requests to distribute, the target CDN that distributes the content to the UE.

Step 603: Send the selected target CDN information to the source CDN.

9 is a flow chart of another embodiment of a target CDN selection method of the present invention. As shown in FIG. 9, the target CDN selection method of this embodiment includes the following steps: Step 701: Receive a query request sent by the source CDN, where the query request includes content information that the UE requests to distribute. In order for the source CDN to select a target CDN for distributing content to the UE based on the information.

In the embodiment shown in Figs. 8 and 9, the target CDN information of the distributed content may include: a CDN storing the content and its status information. Specifically, the CDN information of the stored content includes: CDN information for storing the content or correspondence relationship information between the CDN and the content information stored by the CDN; and the status information of the CDN includes load and health status information of the CDN. After receiving the content distribution request, the source CDN distributes the requested content of the CDF to the UE, and the session request of the CDF is increased, thereby increasing the load of the cluster where the CDF is located, thereby increasing the load of the CDN. The health status identifies whether the CDN is working properly. When the load of a CDN reaches the upper limit, the new content distribution request can no longer be processed, and the health status may change to a CDF exception. The CDN information of the distributed content is selected to be a target CDN that can distribute the content to which the request is distributed to the UE, and the source CDN can be prevented from being multi-level forwarded or even cyclically forwarded when the content distribution request cannot be processed, thereby effectively saving the processing of the user content distribution request. At the time, the response message can be returned to the user in time, thereby improving the quality of service of the CDN.

In addition, as an embodiment of the present invention, in the embodiment shown in FIG. 8 and FIG. 9, the method further includes: receiving, by the source CDN, a first update request, where the first update request is performed by the source CDN after the content is cached. Sending, for requesting to update CDN information distributing a certain content; updating CDN information storing the content according to the first update request.

Further, as a specific embodiment of the present invention, in the embodiment shown in FIG. 8 and FIG. 9, the method further includes: receiving a second update request sent by the source CDN or the target CDN, where the second update request is sent by the source CDN or The target CDN is transmitted after distributing the content to the UE or after distributing the content to the UE, for requesting to update the status information of the source CDN or the target CDN; updating the status information of the source CDN or the target CDN according to the second update request. In addition, as another embodiment of the present invention, in the embodiment shown in FIG. 8 and FIG. 9, before receiving the query request sent by the source CDN, the step 601 or the step 701 may further include: generating content that the distributed UE requests to distribute. CDN information. Specifically, the CDN information of the content that the UE requests to distribute may be generated by: receiving the content information of the CDN stored by the CDN and the status information of the CDN, and the content information of the CDN and the status information of the CDN are reported based on the CC in the CDN. The content information and the status information are generated, and the content information and the status information are content information and status information stored in the CDF of the cluster in which the CC is collected by the CC; and the content information and the CDN status information generated by each CDN in the CDN system are generated. The CDN information that distributes the content.

Figure 10 is a flow diagram of one embodiment of generating CDN information for distributed content in accordance with the present invention. As shown

10, the embodiment includes the following steps:

Step 801: In each CDN, each CC separately collects the content information and status information of the CDF stored in the cluster, and reports the information to the CDNC in the CDN.

After receiving the content information and status information stored in the CDF, the CDNC may return a 800 OK response message to the CC.

When a certain content is distributed to the cluster due to its high popularity or under the control of the AS, the content can be obtained within the cluster, when a certain content is reduced from popularity or controlled by the AS from the clustered storage. When the space is deleted, its contents are no longer available in the cluster. A change in the content information stored in the CDF can be expressed in the available state of the content.

Step 802: The CDNC generates the content information and status information reported by each CC.

The content information stored by the CDN and the status information of the CDN are reported to the TOP-CDNC.

After receiving the content information and status information stored by the CDF, the CDNC analyzes the content information of the CDF, and only reflects whether the content is in an available state in the entire CDN, without paying attention to its specific distribution in the CDN. Happening.

As a specific embodiment of the present invention, the CDNC can follow a preset period, periodically

TOP-CDNC reports the content information and status information stored in the CDN, and can also save only in the CDN. The stored content information and status information are reported to the TOP-CDNC when there is a change compared to the corresponding information received last time.

After receiving the content information and status information stored in the CDN reported by the CDNC, the TOP-CDNC may return a 800 OK response message to the CDNC.

Step 803, the TOP-CDNC generates CDN information for distributing each content according to the content information and the status information stored in each CDN.

After the TOP-CDNC generates the CDN information for distributing each content, the CDN information of each content of the distribution may be stored, so that the target CDN of the content distribution request sent by the UE is selected and subsequently processed according to the CDN information of the distributed content.

FIG. 11 is a schematic structural diagram of an embodiment of a content distribution apparatus according to the present invention. The content distribution apparatus of the embodiment can be used as a source CDN to implement the processes of the embodiments shown in FIG. 2, FIG. 4, FIG. 5 and FIG. As shown in FIG. 11, the content distribution processing apparatus of this embodiment includes a first receiving module 901, a first transmitting module 902, and a request processing module 903. The first receiving module 901 is configured to receive a content distribution request sent by the UJE, where the content distribution request includes content information that is requested to be distributed, and receives target CDN related information returned by the TOP-CDNC. The first sending module 902 is configured to send a query request to the TOP-CDNC, where the query request includes content information that the UE requests to distribute. In addition, as an optional embodiment, the first sending module 902 may send a query request to the TOP-CDNC only when the content distribution device cannot process the content distribution request received by the first receiving module 901. The request processing module 903 is configured to request the target CDN to process the content distribution request according to the target CDN related information received by the first receiving module 901, and distribute the content of the request to the UE. The target CDN related information may be target CDN information, for example: IP address information of the target CDN, MAC address information, routing information, and the like, all information that can locate the target CDN, or CDN information of the content that the UE requests to distribute. When the target CDN information is the CDN information of the content that the UE requests to distribute, the first receiving module 901 specifically receives the content distribution request sent by the UE, where the content distribution request includes the content information requested by the UE, and receives the distribution returned by the TOP-CDNC. CDN letter requesting the content to be distributed Information, and based on the CDN information distributing the content, select a target CDN for processing the content distribution request.

FIG. 12 is a schematic structural diagram of another embodiment of a content distribution apparatus according to the present invention. In this embodiment, the target CDN related information is target CDN information. Compared with the embodiment shown in FIG. 11 , the request processing module 903 includes a forwarding unit 9031 for forwarding a content distribution request to the target CDN according to the target CDN information received by the first receiving module 901. In order for the target CDN to distribute the corresponding content to the UE.

FIG. 13 is a schematic structural diagram of still another embodiment of a content distribution apparatus according to the present invention. In this embodiment, the target CDN related information is target CDN information. Compared with the embodiment shown in Fig. 11, in this embodiment, the request processing module 903 includes an obtaining unit 9032 and a distributing unit 9033. The obtaining unit 9032 is configured to acquire, according to the target CDN information received by the first receiving module 901, the content requested by the UE from the target CDN. The distribution unit 9033 is configured to distribute the content acquired by the obtaining unit 9032 to the UE according to the content distribution request.

Referring to FIG. 13, as another optional embodiment of the content distribution apparatus of the present invention, the request processing module 903 may further include a buffer unit 9034 for buffering the content acquired by the obtaining unit 9032, so as to facilitate subsequent receiving of the content distribution request. The content can be distributed directly to the UE without re-acquiring the content from the target CDN, which can further save time in processing the content distribution request.

In addition, in the content distribution apparatus of the embodiment shown in FIG. 13 of the present invention, the first sending module 902 is further configured to send a first update request to the TOP-CDNC after the buffer unit 9034 caches the content acquired by the obtaining module 9032. An update request is for requesting the TOP-CDNC to update the CDN information of the content acquired by the distribution acquisition module 9032.

Specifically, the CDN information of the content acquired by the distribution obtaining module 9032 includes: a CDN storing the content and status information thereof. Correspondingly, the first sending module 902 is further configured to: when the distributing unit 9033 distributes the content to the UE or after distributing the content to the UE, send a second update request to the TOP-CDNC, where the second update request is used to request the TOP- CDNC update source CDN status information.

FIG. 14 is a schematic structural diagram of an embodiment of a source CDN selection apparatus according to the present invention. The source CDN selection apparatus of this embodiment can be used to implement the flow of the embodiment shown in FIG. 7 of the present invention. As shown in FIG. 14, the source CDN selecting means of this embodiment includes a second receiving module 1001, a determining module 1002, and a first selecting module 1003. The second receiving module 1001 is configured to receive a request message sent by the UE, where the request message includes user information. The determining module 1002 is configured to determine a geographic attribute of the user based on the user information. The first selection module 1003 is configured to select, according to the geographic attribute of the user, a CDN corresponding to the geographic attribute of the user from the CDN system as a source CDN for processing the content distribution request sent by the UE.

Specifically, the source CDN selection device of the embodiment shown in FIG. 14 may be a registration server when a service registration service is provided to a user, or an application system that provides a service service to a user, or another communication device.

Figure 15 is a block diagram showing the structure of an embodiment of the target CDN selection device of the present invention. The target CDN selection device of the embodiment can be implemented as a TOP-CDNC to implement the flow of the embodiment shown in Figure 8 of the present invention. As shown in FIG. 15, the target CDN selection apparatus of this embodiment includes a third receiving module 1101, a storage module 1102, an obtaining module 1103, a second selecting module 1104, and a second transmitting module 1105. The third receiving module 1101 is configured to receive a query request sent by the source CDN, where the query request includes content information that the UE requests to distribute. The storage module 1102 is configured to store CDN information for distributing each content. The obtaining module 1103 is configured to distribute the CDN information of the content requested by the UE for distribution from the storage module 1102. The second selection module 1104 is configured to select a target CDN for distributing content to the UE according to the CDN information acquired by the obtaining module 1103. The second sending module 1105 is configured to send the target CDN information selected by the second selecting module 1104 to the source CDN.

FIG. 16 is a schematic structural diagram of another embodiment of the target CDN selection apparatus according to the present invention. The target CDN selection apparatus of this embodiment can also be used to implement the flow of the embodiment shown in FIG. 8 of the present invention. The target CDN information of the distributed content in this embodiment includes the CDN storing the content and its status information as compared with the embodiment shown in FIG. Correspondingly, the third receiving module 1101 is further configured to receive a first update request sent by the source CDN, the first update request is for requesting to update CDN information of the content of the distributed source CDN cache, and receiving a second update request sent by the source CDN or the target CDN, the second update request is for request Update status information of the source CDN or target CDN. The target CDN selection device of the embodiment further includes an update module 1106, configured to update the CDN information of the corresponding content stored in the storage module 1102 according to the first update request received by the third receiving module 1101, and receive according to the third receiving module 1101. The second update request is to update the status information of the source CDN or the target CDN stored in the storage module 1102.

Referring to FIG. 16, in the target CDN selection apparatus of the embodiment of the present invention, the third receiving module 1101 is further configured to receive, by the CDN, the content information of the CDN and the status information of the CDN, where the content information of the CDN is stored. The status information of the CDN is generated based on the content information and the status information reported by the CC in the CDN, and the content information and the status information are content information and status information stored by the CDF in the cluster where the CC is collected, respectively. Correspondingly, the target CDN selection device of the embodiment further includes a generating module 1107, configured to generate CDN information of the distributed content according to the content information stored in each CDN and the state information of the CDN in the CDN system received by the third receiving module 1101, And stored in the storage module 1102.

FIG. 17 is a schematic structural diagram of still another embodiment of the target CDN selection apparatus according to the present invention. The target CDN selection apparatus of the embodiment can be used as the TOP-CDNC to implement the embodiment shown in FIG. 9 of the present invention. Process. As shown in FIG. 17, the target CDN selection apparatus of this embodiment includes a third receiving module 1101, a storage module 1102, an obtaining module 1103, and a third transmitting module 1108. The third receiving module 1101 is configured to receive a query request sent by the source CDN, where the query request includes content information that the UE requests to distribute. The storage module 1102 is configured to store CDN information that distributes each content. The obtaining module 1103 is configured to distribute, from the storage module 1102, CDN information of the content requested by the UE for distribution. The third sending module 1108 is configured to send, to the source CDN, the target CDN information of the distributed content acquired by the acquiring module 1103, so that the source CDN selects the target CDN that distributes the content to the UE.

FIG. 18 is a schematic structural diagram of still another embodiment of a target CDN selection apparatus according to the present invention; The target CDN selection device of the embodiment can also be used to implement the flow of the embodiment of Figure 9 of the present invention. Compared with the embodiment shown in Fig. 17, the target CDN information of the distributed content in this embodiment includes the CDN storing the content and its status information. Correspondingly, the third receiving module 1101 is further configured to receive a first update request sent by the source CDN, where the first update request is used to request to update CDN information of the content of the distributed source CDN cache, and receive the first CDN or the target CDN to send the first And a second update request for requesting to update status information of the source CDN or the target CDN. The target CDN selection device of the embodiment further includes an update module 1106, configured to update the CDN information of the corresponding content stored in the storage module 1102 according to the first update request received by the third receiving module 1101, and receive according to the third receiving module 1101. The second update request is to update the status information of the source CDN or the target CDN stored in the storage module 1102.

Referring to FIG. 17, in the target CDN selection apparatus of the embodiment of the present invention, the third receiving module 1101 is further configured to receive, by the CDN, the content information of the CDN and the status information of the CDN, where the content information of the CDN is stored. The status information of the CDN is generated based on the content information and the status information reported by the CC in the CDN, and the content information and the status information are content information and status information stored by the CDF in the cluster where the CC is collected, respectively. Correspondingly, the target CDN selection device of the embodiment further includes a generating module 1107, configured to generate CDN information of the distributed content according to the content information stored in each CDN and the state information of the CDN in the CDN system received by the third receiving module 1101, And stored in the storage module 1102.

A content distribution network system provided by an embodiment of the present invention can be used to implement the processes of the embodiments shown in FIG. 2, FIG. 4 and FIG. 8 of the present invention. It includes a TOP-CDNC and multiple CDNs. See Figure 3 for a detailed network structure. Among them, one of the plurality of CDNs serves as a default CDN for processing a content distribution request sent by the UE, that is, a source CDN. The source CDN is configured to receive a content distribution request sent by the UE, where the content distribution request includes content information requesting distribution; send a query request to the TOP-CDNC, where the content distribution request includes content information requested for distribution; and receiving the TOP-CDNC return Target CDN information; requesting the target CDN to process the content distribution request based on the target CDN information. TOP-CDNC is used to store CDNs that distribute content Receiving a query request sent by the source CDN, acquiring CDN information of the distributed content; selecting a target CDN for distributing the content to the UE according to the CDN information of the distributed content, and transmitting the target CDN information to the source CDN. As another embodiment of the present invention, the source CDN may send a query request to the TOP-CDNC only when the content distribution request cannot be processed. Specifically, in the CDN system of this embodiment, the source CDN can be implemented by the content distribution apparatus of the embodiment shown in FIG. 11, FIG. 12 and FIG. 13, and the TOP-CDNC can pass the target CDN of the embodiment shown in FIG. 15 or FIG. Select device implementation.

Another content distribution network system provided by an embodiment of the present invention can be used to implement the processes of the embodiments as shown in FIG. 2, FIG. 6 and FIG. It includes a TOP-CDNC and multiple CDNs. See Figure 3 for a detailed network structure. among them. One of the plurality of CDNs serves as the default CDN for processing the content distribution request sent by the UE, that is, the source CDN. The source CDN is configured to receive a content distribution request sent by the UE, where the content distribution request includes content information that the UE requests to be distributed, and send a query request to the TOP-CDNC, where the content distribution request includes content information that the UE requests to be distributed; and receiving the TOP- The CDN information of the distributed content returned by the CDNC; the target CDN for processing the content distribution request sent by the UE is selected according to the CDN information of the distributed content; and the target CDN is requested to process the content distribution request according to the target CDN information. The TOP-CDNC is configured to store CDN information for distributing the content; receiving a query request sent by the source CDN, acquiring CDN information of the content requested by the distribution UE, and transmitting CDN information of the content requested by the distribution UE to the source CDN. As another embodiment of the present invention, the source CDN may send a query request to the TOP-CDNC only when the content distribution request cannot be processed. Specifically, in the CDN system of this embodiment, the source CDN can be realized by the content distribution apparatus of the embodiment shown in Fig. 11, and the TOP-CDNC can be realized by the target CDN selection means of the embodiment shown in Fig. 15 or Fig. 16.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. Including the steps of the above method embodiments; The foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The embodiment of the present invention may query the target CDN information that distributes the content from the TOP-CDNC, directly select a target CDN that processes the content distribution request according to the target CDN information, and request the target CDN to process the content distribution request to avoid processing unavoidable. The content distribution request is multi-level forwarding or even cyclic forwarding, which effectively saves the time for processing the user content distribution request, and can return the response message to the user in time, thereby improving the service quality of the CDN.

In addition, the embodiment of the present invention adopts a decentralization method to process a content distribution request from the UE, that is, the content distribution request is first processed by the source CDN as the default CDN, and the TOP-CDNC is only used as the query center, instead of directly by the TOP-CDNCC. The content distribution request from the UE is processed centrally, thereby greatly improving the performance of the CDN system, further saving the polling time when the source CDN cannot process the content distribution request, and improving the service processing efficiency.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and are not to be construed as limiting. Although the present invention has been described in detail with reference to the preferred embodiments thereof, those skilled in the art will understand that the invention may be modified or equivalently substituted without departing from the teachings of the present invention. The spirit and scope of the programme.

Claims

Claim

A content distribution method, comprising:

Receiving information related to the target CDN returned by the TOP-CDNC;

The target CDN is requested to process the content distribution request.

The method according to claim 1, wherein the receiving content distribution request is specifically: the source CDN in the content distribution network CDN system receives the content distribution request; and the query request sent to the TOP-CDNC is specifically: The source CDN sends a query request to the TOP-CDNC;

Receiving the target CDN related information returned by the TOP-CDNC includes:

The source CDN receives target CDN information returned by the TOP-CDNC, and the target CDN is selected by the TOP-CDNC according to CDN information distributing the content; or

The source CDN receives CDN information of the content distributed by the TOP-CDNC; the source CDN selects a target CDN for processing the content distribution request based on CDN information distributing the content.

3. The method according to claim 2, wherein requesting the target CDN to process the content distribution request comprises:

The source CDN forwards the content distribution request to the target CDN according to the target CDN information, so that the target CDN distributes the content to the user terminal according to the content distribution request; or

The source CDN acquires the content from the target CDN according to the target CDN information, and distributes the content to the user terminal according to the content distribution request.

4. The method according to claim 3, wherein the forwarding the content distribution request to the target CDN comprises:

The source CDN sends a redirect request to the user terminal, where the redirect request includes the target CDN information, and is used to request the user terminal to redirect the content distribution request to the target CDN.

5. The method according to claim 3, after acquiring the content from the target CDN, further comprising: buffering the content in the source CDN, and sending the first to the TOP-CDNC An update request, the first update request is used to request the TOP-CDNC to update CDN information that distributes the content.

6. The method according to claim 5, wherein distributing CDN information of the content comprises: storing a CDN of the content and status information thereof.

The method according to claim 6, wherein, after the source CDN distributes the content to the user terminal or after distributing the content to the user terminal, the method further includes:

The source CDN sends a second update request to the TOP-CDNC, the second update request for requesting the TOP-CDNC to update status information of the source CDN.

The method according to any one of claims 1 to 7, characterized in that the sending of the query request to the TOP-CDNC is specifically: sending a query request to the TOP-CDNC when the content distribution request cannot be processed.

9. A source content distribution network selection method, comprising:

Receiving a request message sent by the user terminal, where the request message includes user information; determining a geographical attribute of the user according to the user information;

10. The method according to claim 9, wherein the request message comprises a registration request message or a service request message.

A method for selecting a target content distribution network, which is characterized by comprising: Receiving a query request sent by the source CDN, where the query request includes content information requested by the user terminal for distribution;

The target CDN information is transmitted to the source CDN.

12. The method according to claim 11, wherein the distributing the target CDN information of the content comprises: storing the CDN of the content and status information thereof.

The method according to claim 12, wherein the storing CDN information of the content comprises: correspondence between the content and CDN information storing the content or content information of each CDN and content information stored therein; CDN The status information includes the load and health status information of the CDN.

14. The method according to claim 12, further comprising:

Receiving a first update request sent by the source CDN, where the first update request is sent by the source CDN after buffering the content, for requesting to update CDN information that distributes the content; according to the first update request Update the CDN information that stores the content.

The method according to claim 14, further comprising:

Receiving a second update request sent by the source CDN or the target CDN, the second update request being distributed by the source CDN or the target CDN to the user terminal or distributed to the user terminal The content is sent after, and is used to request to update status information of the source CDN or the target CDN;

Updating the status CD of the source CDN or the target CDN according to the second update request.

The method according to any one of claims 11 to 15, wherein before receiving the query request sent by the source CDN, the method further includes:

Generate CDN information that distributes the content.

17. The method according to claim 16, wherein said generating a distribution The CDN information of the content includes:

Receiving the content information of the CDN and the status information of the CDN, and the status information of the CDN and the status information of the CDN are generated based on the content information and status information reported by the cluster control unit CC in the CDN, the content information and status. The information is the content information and the status information stored by the content distribution function entity CDF in the cluster in which the CC is collected by the CC, and the CDN information for distributing the content is generated according to the content information stored in each CDN of the CDN system and the status information of the CDN.

18. A method for selecting a target content distribution network, comprising:

Receiving a query request sent by the source CDN, where the query request includes content information requested by the user terminal for distribution;

19. The method of claim 18, wherein distributing the target CDN information of the content comprises: storing the CDN of the content and its status information.

The method according to claim 19, wherein the storing CDN information of the content comprises: CDN information storing the content or correspondence relationship information between each CDN and content information stored therein; CDN The status information includes the load and health status information of the CDN.

21. The method of claim 18, further comprising:

The method according to claim 21, further comprising:

Receiving a second update request sent by the source CDN or the target CDN, the second update request being distributed by the source CDN or the target CDN to the user terminal or Transmitting, after distributing the content to the user terminal, for requesting to update status information of the source CDN or the target CDN;

The method according to any one of claims 18 to 22, further comprising: before receiving the query request sent by the source CDN, further comprising:

Generate CDN information that distributes the content.

The method according to claim 23, wherein the generating CDN information for distributing the content comprises:

Receiving the content information of the CDN and the status information of the CDN, and the status information of the CDN and the status information of the CDN are generated based on the content information and status information reported by the CDN internal group control unit CC, the content information and status. The information is content information and state information stored by the content distribution function entity CDF in the cluster where the CC is collected by the CC; and the CDN information for distributing the content is generated according to content information stored in each CDN of the CDN system and status information of the CDN. .

25. A content distribution apparatus, comprising:

a first receiving module, configured to receive a content distribution request, where the content distribution request includes content information that is requested to be distributed, and receive target CDN related information returned by the TOP-CDNC;

a first sending module, configured to send a query request to the TOP-CDNC, where the query request includes the content information of the request distribution;

The device according to claim 25, wherein the target CDN related information is specifically target CDN information; or

The target CDN related information is specifically CDN information that distributes the content; correspondingly, the first receiving module specifically receives a content distribution request, where the content distribution request includes a request score And transmitting the content information, and receiving the CDN information of the content distributed by the TOP-CDNC, and selecting a target CDN for processing the content distribution request according to the CDN information distributing the content.

The device according to claim 26, wherein the request processing module comprises a forwarding unit, configured to forward the content distribution request to the target CDN according to the target CDN information.

The device according to claim 26, wherein the request processing module comprises:

An obtaining unit, configured to acquire the content from the target CDN according to the target CDN information;

And a distribution unit, configured to distribute the obtained content to the user terminal according to the content distribution request.

The device according to claim 28, further comprising:

a cache unit, configured to cache the obtained content.

The device according to claim 29, wherein the first sending module is further configured to: after the cache unit caches the acquired content, send a first update request to the TOP-CDNC, where The first update request is for requesting the TOP-CDNC to update CDN information that distributes the content.

31. The apparatus of claim 30, wherein distributing CDN information of the content comprises: storing a CDN of the content and status information thereof;

The first sending module is further configured to send a second update request to the TOP-CDNC when the distribution unit distributes the content to the user terminal or after distributing the content to the user terminal, the second update The request is for requesting the TOP-CDNC to update status information of the source CDN.

32. A source content distribution network selection device, comprising:

a second receiving module, configured to receive a request message sent by the user terminal, where the request message is included in the packet User information;

33. A target content distribution network selection device, comprising:

a third receiving module, configured to receive a query request sent by the source CDN, where the query request includes content information requested by the user terminal to be distributed;

34. The apparatus according to claim 33, wherein the target CDN information for distributing the content comprises a CDN storing the content and status information thereof;

The third receiving module is further configured to receive a first update request sent by the source CDN, where the first update request is used to request to update CDN information that distributes the content, and receive the source CDN or the target CDN. Sending a second update request, the second update request for requesting to update status information of the source CDN or the target CDN;

The apparatus further includes an update module, configured to update CDN information storing the content according to the first update request, and update status information of the source CDN or the target CDN according to the second update request.

The apparatus according to claim 34, wherein the third receiving module is further configured to receive content information of the CDN stored by the CDN and status information of the CDN, and the content information of the CDN and the status of the CDN. The information is generated based on the content information and the status information reported by the CC in the CDN, where the content information and the status information are content information and status information stored by the CDF in the cluster where the CC is collected by the CC; The device further includes a generating module, configured to generate CDN information for distributing the content according to content information stored by each CDN in the CDN system and status information of the CDN, and stored in the storage module.

36. A target content distribution network selection device, comprising:

37. The apparatus according to claim 36, wherein the target CDN information for distributing the content comprises a CDN storing the content and status information thereof;

The apparatus according to claim 37, wherein the third receiving module is further configured to receive the content information of the CDN stored by the CDN and the status information of the CDN, and the content information of the CDN and the status information of the CDN. And generating, according to the content information and the status information reported by the CC in the CDN, the content information and the status information are content information and status information stored by the CDF in the cluster where the CC is collected by the CC;

The device further includes a generating module, configured to generate CDN information for distributing the content according to content information stored by each CDN in the CDN system and status information of the CDN, and store the In the storage module.

39. A content distribution network system, comprising: a TOP-CDNC and a plurality of CDNs, wherein a source CDN of the plurality of CDNs is configured to receive a content distribution request, wherein the content distribution request includes a request Content information distributed; sending a query request to the TOP-CDNC, the content distribution request including content information of the request distribution; and receiving target CDN information returned by the TOP-CDNC; requesting according to the target CDN information The target CDN processes the content distribution request;

40. A content distribution network system, comprising: a TOP-CDNC and a plurality of CDNs, wherein a source CDN of the plurality of CDNs is configured to receive a content distribution request, where the content distribution request includes a request Content information distributed; sending a query request to the TOP-CDNC, the content distribution request including content information of the request distribution; and receiving CDN information of the content distributed by the TOP-CDNC; The CDN information of the content, selecting a target CDN for processing the content distribution request; and requesting the target CDN to process the content distribution request according to the target CDN information;