CN101540775B

CN101540775B - Method and device for distributing contents and network system for distributing contents

Info

Publication number: CN101540775B
Application number: CN200910138527.XA
Authority: CN
Inventors: 黄卉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-04-30
Filing date: 2009-04-30
Publication date: 2012-05-23
Anticipated expiration: 2029-04-30
Also published as: CN101540775A; WO2010124550A1

Abstract

The embodiment of the invention discloses a method and a device for distributing contents and a network system for distributing contents, wherein the method for distributing contents comprises the following steps: receiving a content distribution request including the information of contents requested to be distributed; sending a query request including the information of contents requested to be distributed to a top content distribution network control cell (TOP-CDNC); receiving target CDN related information returned by the TOP-CDNC; and requesting the target CDN to process the content distribution request. The embodiment of the invention can avoid the multilevel forwarding, even cycle forwarding of the content distribution request which can not be processed, effectively save time for processing the content distribution requests from users and return the response messages to the users in time, thereby improving the service quality of the CDN.

Description

Content distribution method, device and content distribution network system

Technical field

The present invention relates to the communication technology, especially a kind of content distribution method, device and content distribution network system.

Background technology

Content distributing network (Content Delivery Network, hereinafter to be referred as: CDN) technology is that (Quality of Service is hereinafter to be referred as a kind of technology that QoS) grows up for the service quality of improving internet (Internet).Its optimization through content is disposed; Realize that the user is to the visit nearby of content and the intelligence shunting of network traffics; Solved because the network bandwidth is little, the user capture amount is big, network point distribution unequal factor is to the influence of user capture effect comprehensively, improved the response speed of network greatly.

The principle of CDN technology is: the media server distributed deployment in network, made content provide and holds the media content that provides, and can be according to set distribution policy; Be pushed to network " edge " from the key part of network in advance near the user; For example: be pushed on " edge " media server, when making the user capture media content, can be responded fast from " edge " media server nearby; Thereby reduce of the influence of factors such as media content transmission delay, network jitter to the visit effect; For the user provides in order and high quality services, make the user can be with the fastest speed, from network, obtain required information near user's place.The CDN technology has greatly been alleviated the congestion situation of the Internet, makes the website have the ability to provide more multiclass like huge media content service of data traffic such as video frequency program, requesting songs.

Fig. 1 is the schematic network structure of prior art CDN.As shown in Figure 1, each CDN comprise a CDN control unit (CDN Controller, hereinafter to be referred as: CDNC), with the cluster that is associated in logic more than, for example: the cluster that is associated on the geographical position.Each cluster comprises a cluster control unit (Cluster Controller; Hereinafter to be referred as: CC); With associated content distribution function entity (Content Delivery Function in logic more than; Hereinafter to be referred as: CDF), for example: the CDF that is associated on geographical position, the memory capacity.Wherein, CDF also is a media server, mainly is responsible for storing media content and to user's distributing media content; CC mainly is in charge of the resource in the cluster of place, comprises distribution, the state of monitoring CDF and the CDF that decision-making provide distribute media content service of decision-making media content in cluster; CDNC is the control centre in the CDN of place, and the major control media content is the distribution in each cluster in CDN, and decision-making provides the cluster of service etc. to the user.

When media content is comparatively complicated, often need unite and form a large-scale CDN and come service to be provided to the user by a plurality of CDN, this large-scale CDN is also referred to as total CDN.In this large-scale content distributing network, each CDN is respectively as sub-CDN, by its inner content distribution of CDNC control.Use application system (the Application System of CDN for needs; Hereinafter to be referred as: AS); For example: interconnection protocol TV (Internet Protocol TV; Hereinafter to be referred as: IPTV) AS, content-on-demand (contenton demand, hereinafter to be referred as: COD) AS etc. is provided with a default sub-CDN.When AS sends the content dispense request; At first this content dispense request is sent to the CDNC among this default sub-CDN, when the CDNC in default CDN can't provide service, again the content dispense request is transmitted to the CDNC processing of other sub-CDN among total CDN; If handling, this CDNC still service can't be provided; The CDNC that then continues this content dispense request is transmitted to other sub-CDN among total CDN handles, and the like, and the circulation that the content dispense request possibly in total CDN, occur is transmitted.

In realizing process of the present invention, the inventor finds that existing CDN provides the technology of content distribution service to have following problem at least to the user:

If owing to receive the media content that the sub-CDN of content dispense request does not store user's request; Or load is higher can't handle this content dispense request; Multistage forwarding that causes this content dispense request even circulation are transmitted, like this, just increased the time of process user content dispense request; Even infinitely prolonged the time of process user content dispense request; Especially under the more situation of the sub-CDN number that in total CDN, comprises, can't in acceptable time, return response message, reduce the service quality of CDN to the user.

Summary of the invention

Embodiment of the invention technical problem to be solved is: a kind of content distribution method, device and content distribution network system are provided, to shorten the time of process user content dispense request, improve the service quality of CDN.

A kind of content distribution processing method that the embodiment of the invention provides comprises:

The received content dispense request comprises the content information that request is distributed in this content dispense request;

Send query requests to top content distributing network control unit TOP-CDNC, comprise the content information of described request distribution in this query requests;

Receive the target CDN relevant information that said TOP-CDNC returns;

Ask said target CDN to handle said content dispense request.

A kind of content delivering apparatus that the embodiment of the invention provides comprises:

First receiver module is used for the received content dispense request, comprises the content information of request distribution in this content dispense request, and receives the target CDN relevant information that TOP-CDNC returns;

First sending module is used for sending query requests to said TOP-CDNC, comprises the content information of described request distribution in this query requests;

Request processing module is used for according to said target CDN relevant information, asks said target CDN to handle said content dispense request.

The content distribution method and the device that provide based on the above embodiment of the present invention; Can send query requests to TOP-CDNC; Obtain the target CDN relevant information of handling this content dispense request from TOP-CDNC, directly request target CDN handles this content dispense request in view of the above, compared with prior art; When having avoided to handle this content dispense request it is carried out multistage forwarding even circulation forwarding; Effectively saved the time of process user content dispense request, can in time return response message, thereby improved the service quality of CDN to the user.

A kind of object content distributing network system of selection that the embodiment of the invention provides comprises:

The query requests that reception sources CDN sends comprises the content information that user terminal requests is distributed in this query requests;

According to the CDN information of the said content that distributes, select to distribute the target CDN of said content to said user terminal;

Send said target CDN information to said source CDN.

A kind of object content distributing network choice device that the embodiment of the invention provides comprises:

The 3rd receiver module is used for the query requests that reception sources CDN sends, and comprises the content information of user terminal requests distribution in this query requests;

Memory module is used to store the CDN information of each content of distributing;

Acquisition module is used for obtaining from said memory module the CDN information of the said content that distributes;

Second selects module, is used for the CDN information according to the said content that distributes, and selects to distribute the target CDN of said content to said user terminal;

Second sending module is used for sending said target CDN information to said source CDN.

The another kind of object content distributing network system of selection that the embodiment of the invention provides comprises:

To the target CDN information of the said content of said source CDN transmission distribution, so that said source CDN selects to distribute the target CDN of said content to said user terminal.

The another kind of object content distributing network choice device that the embodiment of the invention provides comprises:

The 3rd sending module is used for the target CDN information to the said content of said source CDN transmission distribution, so that said source CDN selects to distribute the target CDN of said content to said user terminal.

A kind of content distribution network system that the embodiment of the invention provides comprises a TOP-CDNC and a plurality of CDN, and the source CDN among said a plurality of CDN is used for the received content dispense request, comprises the content information of request distribution in this content dispense request; Send query requests to said TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And receive the target CDN information that said TOP-CDNC returns; According to said target CDN information, ask said target CDN to handle said content dispense request;

Said TOP-CDNC is used to store the CDN information of each content of distribution; Receive said query requests, obtain the CDN information of the said content that distributes; The target CDN that distributes said content according to the CDN Information Selection of this said content that distributes to said user terminal; And send said target CDN information to said source CDN.

The another kind of content distribution network system that the embodiment of the invention provides comprises a TOP-CDNC and a plurality of CDN, and the source CDN among said a plurality of CDN is used for the received content dispense request, comprises the content information of request distribution in this content dispense request; Send query requests to said TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And the CDN information that receives the said content of distribution that said TOP-CDNC returns; According to the CDN information of the said content that distributes, select to be used to handle the target CDN of said content dispense request; And, ask said target CDN to handle said content dispense request according to said target CDN information;

Said TOP-CDNC is used to store the CDN information of each content of distribution; Receive said query requests, obtain the CDN information of the said content that distributes; And send the CDN information of the said content that distributes to said source CDN.

Object content distributing network system of selection that provides based on the above embodiment of the present invention and device, content distribution network system; TOP-CDNC can basis the CDN information of each content of distribution; Obtain the target CDN relevant information of handling this content dispense request and send to source CDN, so that CDN direct request target CDN in source handles this content dispense request, compared with prior art; When having avoided source CDN can't handle this content dispense request it is carried out multistage forwarding even circulation forwarding; Effectively saved the time of process user content dispense request, can in time return response message, thereby improved the service quality of CDN to the user.

A kind of source contents distributing network system of selection that the embodiment of the invention provides comprises:

Receive the request message that user terminal sends, comprise user profile in this request message;

Confirm said user's ground Domain Properties according to said user profile;

From the CDN system, select a CDN corresponding, as the source CDN of the content dispense request of handling said user terminal transmission with said user's ground Domain Properties.

A kind of source contents distributing network choice device that the embodiment of the invention provides comprises:

Second receiver module is used to receive the request message that user terminal sends, and comprises user profile in this request message;

Determination module is used for confirming according to said user profile said user's ground Domain Properties;

First selects module, is used for selecting a CDN corresponding with said user's ground Domain Properties from the CDN system, as the source CDN of the content dispense request of handling said user terminal transmission.

Source contents distributing network based on the above embodiment of the present invention provides is selected and device; Can confirm source CDN according to user's ground Domain Properties as the content dispense request of handling its user terminal transmission; Like this, can handle the content dispense request that its user terminal sends as default CDN by this source CDN, TOP-CDNC is only as the Help Center; And need not focus on the content dispense request by TOP-CDNC; Thereby can improve the performance of CDN system greatly, save in the source sub-CDN poll time can't the contents processing dispense request time, improve Business Processing efficient.Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.

Description of drawings

Fig. 1 is the schematic network structure of prior art CDN;

Fig. 2 is the flow chart of an embodiment of content distribution method of the present invention;

Fig. 3 is the structural representation of a CDN embodiment of system of the present invention;

Fig. 4 is the flow chart of another embodiment of content distribution processing method of the present invention;

Fig. 5 is the flow chart of an application implementation example of content distribution method of the present invention;

Fig. 6 is the flow chart of another embodiment of content distribution method of the present invention;

Fig. 7 is the flow chart of an embodiment of source CDN system of selection of the present invention;

Fig. 8 is the flow chart of an embodiment of target CDN system of selection of the present invention;

Fig. 9 is the flow chart of another embodiment of target CDN system of selection of the present invention;

Figure 10 generates the flow chart of an embodiment of CDN information of distribution of content for the present invention;

Figure 11 is the structural representation of an embodiment of content delivering apparatus of the present invention;

Figure 12 is the structural representation of another embodiment of content delivering apparatus of the present invention;

Figure 13 is the structural representation of another embodiment of content delivering apparatus of the present invention;

Figure 14 is the structural representation of an embodiment of source CDN choice device of the present invention;

Figure 15 is the structural representation of an embodiment of target CDN choice device of the present invention;

Figure 16 is the structural representation of another embodiment of target CDN choice device of the present invention;

Figure 17 is the structural representation of another embodiment of target CDN choice device of the present invention;

Figure 18 is the structural representation of another embodiment of target CDN choice device of the present invention.

Embodiment

The embodiment of the invention can directly be selected a target CDN that can handle this content dispense request in the CDN system; Handle this content dispense request; Thereby when having avoided source CDN can't handle this content dispense request; When especially CDN is larger, the multistage forwarding even the circulation of content dispense request are transmitted.

Fig. 2 is the flow chart of an embodiment of content distribution method of the present invention.As shown in Figure 2, the content distribution method of this embodiment may further comprise the steps:

Step 101, the received content dispense request comprises the content information of request distribution in this content dispense request, in addition, (User Equipment is hereinafter to be referred as UE) address information also to comprise the user terminal of asking distributing contents.

Step 102, to top CDN control unit (TOP-CDN Controller, hereinafter to be referred as: TOP-CDNC) send query requests, comprise the content information of request distribution in this query requests.

As one embodiment of the present of invention, can constitute a total CDN by a plurality of CDN, and constitute a CDN system by this total CDN and TOP-CDNC.As shown in Figure 3, be the structural representation of a CDN embodiment of system of the present invention.In this CDN system, can collect the content information stored among each CDN and the state information of CDN among the TOP-CDNC, and generate the CDN information of each content respectively.In a plurality of CDN, the CDN of default process content dispense request is called source CDN or default CDN, specifically can be to be provided with in advance according to certain rule.

Step 103 receives the target CDN relevant information that TOP-CDNC returns.

Particularly, this target CDN relevant information can be the target CDN information of contents processing dispense request, and target CDN is wherein obtained according to the CDN Information Selection of this content that distributes by TOP-CDNC.

In addition, this target CDN relevant information also can be the CDN information that this content dispense request of distribution is asked the content of distribution.At this moment, can select to be used to handle the target CDN of this content dispense request according to the CDN information of this content that distributes.

Wherein, target CDN information specifically can be target CDN IP address information, media interviews control (Media Access Control, hereinafter to be referred as: MAC) address information, routing iinformation etc. all can locate the information of this target CDN.

Step 104, according to this target CDN relevant information, request target CDN handles this content dispense request.

Above-mentioned this embodiment shown in Figure 2 of the present invention specifically can be realized by the source CDN of the UE that sends the content dispense request.When CDN handles the content dispense request of UE transmission in the source, send query requests, obtain the target CDN relevant information of handling this content dispense request from TOP-CDNC to TOP-CDNC; Directly select the target CDN that can handle this content dispense request, and ask this target CDN contents processing dispense request, thereby when having avoided handling this content dispense request; When especially CDN is larger; Multistage forwarding even circulation to the content dispense request are transmitted, and have effectively saved the poll time of process user content dispense request, can in time return response message to the user; Thereby improved the service quality of CDN, improved user experience.

In various embodiments of the present invention, the CDN information of distribution of content can be the CDN and the state information thereof of this content of storage.Wherein, the CDN information of storing this content can be this content and the CDN information of storing this content, the perhaps correspondence relationship information between the content information of each CDN and its storage.The state information of CDN comprises load and the health status information of CDN, wherein, and after source CDN receives the content dispense request; Because CDF wherein is to the content of its request of UE distribution; Cause the conversation request of CDF to increase, increased the load of this CDF place cluster, thereby increased the load of this CDN.Whether this CDN of health status sign can operate as normal, prescribes a time limit when the load of a CDN reaches, and just can not handle new content dispense request again, and it is unusual that health status possibly be changed to CDF.

In various embodiments of the present invention; Default CDN also can be only in the time can't handling the content dispense request of UE transmission; Send query requests to TOP-CDNC, so just can reduce when default CDN itself can handle the content dispense request of UE transmission, and request target CDN handles this needed time of content dispense request; Thereby save the poll time of process user content dispense request; Can in time return response message, thereby improve the service quality of CDN, improve user experience to the user.

Fig. 4 is the flow chart of another embodiment of content distribution processing method of the present invention.As shown in Figure 4, the content distribution processing method of this embodiment may further comprise the steps:

Step 201, source CDN received content dispense request comprises the content information that request is distributed in this content dispense request, in addition, also comprise the UE address information of asking distributing contents.

Step 202, the TOP-CDNC of source CDN in the CDN system sends query requests, comprises in this query requests that the content dispense request asks the content information of distributing.

Step 203 receives the target CDN information that TOP-CDNC selects and returns.

Step 204, source CDN asks corresponding target CDN to handle this content dispense request according to target CDN information.

As a concrete embodiment, in the step 204, source CDN can be transmitted to target CDN with this content dispense request, particularly, can this content dispense request be redirected to target CDN, also can this content dispense request directly be transmitted to target CDN; Target CDN handles this content dispense request, according to this content dispense request, to the UE distributing contents.

As another concrete embodiment, in the step 204, source CDN can obtain the content that the content dispense request is asked distribution from target CDN according to target CDN information, and according to the content dispense request, to the UE distributing contents.

Based on the high characteristics of user content dispense request concurrency among the big capacity C DN; In order to reduce the number of sessions that TOP-CDNC handles; Avoid TOP-CDNC to become the performance bottleneck of CDN system, in this embodiment shown in Figure 4, take the decentralization method to handle content dispense request from UE; That is: earlier by the source CDN contents processing dispense request as default CDN, TOP-CDNC is only as the Help Center.Rather than directly focus on content dispense request from UE by TOP-CDNCC, and can improve the performance of CDN system greatly, further save in the source CDN poll time can't the contents processing dispense request time, improve Business Processing efficient.

Fig. 5 is the flow chart of an application implementation example of content distribution processing method of the present invention, and this embodiment is concrete an application embodiment illustrated in fig. 4.As shown in Figure 5, this application implementation example may further comprise the steps:

Step 301, COD AS receives the business request information that the user sends through its UE, and a certain content of acquisition request carries the UE address information in this business request information.

Step 302; COD AS obtains the corresponding attributed region of ID, confirms as the source CDN that this user provides service, and to the address that obtains of UE returned content; That is: the IP address of source CDNC; Particularly, can through unified resource identifier (Uniform Resource Indentifier, hereinafter to be referred as: URI) to the address that obtains of UE returned content.

Step 303, UE is according to the address information of source CDN, sends the content dispense request to source CDN, wherein carries the user and asks the content and the UE address information of distributing.

Step 304, source CDN receives the content dispense request, judges whether to handle this content dispense request, and for example: whether the state of content and this source CDN that whether stores user request is normal.If can handle this content dispense request, execution in step 305.Otherwise, if can't handle this content dispense request, execution in step 306.

Step 305, source CDN returns response message to UE, to the content of its request of UE distribution.Afterwards, no longer carry out the flow of present embodiment.

Step 306, the TOP-CDNC of source CDN in its place CDN system sends query requests, comprises the content information of request distribution in this query requests.

Step 307, TOP-CDNC asks the CDN information of content of distribution according to the distribution of content dispense request, selects to be used to handle the target CDN of this content dispense request, and the address information of this target CDN is sent to source CDN.

Step 308, source CDN sends redirect request according to the address information of target CDN to UE, comprises the address information of target CDN in this redirect request, and request UE is redirected to target CDN with the content dispense request.In addition, the target CDN information of carrying in this redirect request also can be the out of Memory except that the address information of target CDN, as long as source CDN can send message to target CDN in view of the above.

Step 309, UE sends to target CDN according to the address information of the target CDN of redirect request with this content dispense request.

Step 310 is after target CDN receives the content dispense request, according to one of them CDF of policy selection that is provided with in advance, to the content of its request of UE distribution.

Fig. 6 is the flow chart of another embodiment of content distribution method of the present invention.As shown in Figure 6, the content distribution processing method of this embodiment may further comprise the steps:

Step 401, source CDN receives the content dispense request that UE sends, and comprises the UE address information of content information with the request distributing contents of request distribution in this content dispense request.

Step 402, the TOP-CDNC of source CDN in the CDN system of place sends query requests, comprises the content information of request distribution in this query requests.

Step 403, TOP-CDNC asks the CDN information of the content of distribution to send to source CDN the distribution of content dispense request.

Step 404, source CDN asks the CDN information of content of distribution according to the distribution of content dispense request, selects a target CDN who is used to handle this content dispense request.

Step 405, source CDN request target CDN handles this content dispense request.

Based on the high characteristics of user content dispense request concurrency among the big capacity C DN; In order to reduce the number of sessions that TOP-CDNC handles; Avoid TOP-CDNC to become the performance bottleneck of CDN system, in this embodiment shown in Figure 6, take the decentralization method to handle content dispense request from UE; That is: earlier by default CDN contents processing dispense request, TOP-CDNC is only as the Help Center.Rather than directly focus on content dispense request from UE by TOP-CDNC, and further improved the performance of CDN system greatly, save in the source CDN poll time can't the contents processing dispense request time, improve Business Processing efficient.

As a concrete embodiment, in the step 405, source CDN can be transmitted to target CDN with this content dispense request, particularly, can this content dispense request be redirected to target CDN, also can this content dispense request directly be transmitted to target CDN; Target CDN handles this content dispense request, according to this content dispense request, to the UE distributing contents.

As another concrete embodiment, in the step 405, source CDN can obtain the content that the content dispense request is asked distribution from target CDN according to target CDN information, and according to the content dispense request, to the UE distributing contents.

Further; As embodiments of the invention; In step 204 and the step 405, source CDN after target CDN obtains the content that the content dispense request asks to distribute, can be in the CDN of this source its content of obtaining of buffer memory; And send first to TOP-CDNC and upgrade request, request TOP-CDNC upgrades the CDN information of its content of obtaining that distributes.According to one embodiment of present invention, the CDN information of distribution of content comprises: the CDN and the state information thereof of storing this content.Equally; Source CDN or target CDN are when UE distributes the content of its request; Perhaps after the content of its request of UE distribution, can also send second to TOP-CDNC and upgrade request, the state information that request TOP-CDNC upgrades source CDN or target CDN is so that in the flow; TOP-CDNC selects to be used for the target CDN of contents processing dispense request more accurately according to the CDN and the state information thereof of this content that distributes.

As one embodiment of the present of invention, can adopt and CDN divides consistent principle, select default CDN, with source CDN as the content dispense request of a certain UE transmission of default process.For example: CDN normally divides according to the ground Domain Properties, and the cluster that promptly on the region, closes on some, serve for an identical panel region user is divided into a CDN.Like this; When selecting default CDN, specifically can be: user's Internet protocol (internet protocol according to user profile, for example; Hereinafter to be referred as: IP) address or log-on message; Confirm its attributed region, thereby confirm, the CDN in the territory or close on this CDN as the default CDN that service is provided in this home.Concrete when confirming default CDN, the registrar in the time of can the service log-on service being provided to the user confirms, also can be by the application system that the user is provided business service, for example: IPTV AS, COD AS etc.

Fig. 7 is the flow chart of an embodiment of source CDN system of selection of the present invention, and as shown in Figure 7, this embodiment may further comprise the steps:

Step 501 receives the request message that UE sends, and comprises user profile in this request message.

Particularly, this request message can be login request message or business request information, also can be other message.

Step 502, according to user profile and region corresponding relationship between attributes, confirm with request message in the corresponding user's of user profile ground Domain Properties.

Step 503 is selected a corresponding CDN of ground Domain Properties with the user who confirms from the CDN system, as the source CDN of the content dispense request of processing UEUE transmission.

Confirm user's ground Domain Properties according to user profile; And select a CDN corresponding in view of the above with this ground Domain Properties; Source CDN as the content dispense request of handling the UE transmission; Can realize the processing nearby of content dispense request like this, further save in the source CDN poll time can't the contents processing dispense request time, improve Business Processing efficient.

Fig. 8 is the flow chart of an embodiment of target CDN system of selection of the present invention.As shown in Figure 8, the target CDN system of selection of this embodiment may further comprise the steps:

Step 601, the query requests that reception sources CDN sends comprises the content information that the UE request is distributed in this query requests.

Step 602, the CDN information of the content that request is distributed according to distribution UE is selected the target CDN to this content of UE distribution.

Step 603 is sent the target CDN information of selecting to source CDN.

Fig. 9 is the flow chart of another embodiment of target CDN system of selection of the present invention.As shown in Figure 9, the target CDN system of selection of this embodiment may further comprise the steps:

Step 701, the query requests that reception sources CDN sends comprises the content information that the UE request is distributed in this query requests.

Step 702 is sent the target CDN information that distribution UE asks the content of distribution to source CDN, so that source CDN is according to the target CDN of this Information Selection to the UE distributing contents.

In Fig. 8 of the present invention and embodiment shown in Figure 9, the target CDN information of distribution of content can comprise: the CDN of memory contents and state information thereof.Particularly, the CDN information of memory contents comprises: the correspondence relationship information between the CDN information of each content and this content of storage or the content information of each CDN and its storage; The state information of CDN comprises load and the health status information of this CDN.Wherein, after source CDN receives the content dispense request,, increased the load of this CDF place cluster, thereby increased the load of this CDN because CDF wherein to the content of its request of UE distribution, causes the conversation request of CDF to increase.Whether this CDN of health status sign can operate as normal, prescribes a time limit when the load of a CDN reaches, and just can not handle new content dispense request again, and it is unusual that health status possibly be changed to CDF.Select a target CDN that can distribute its request distributing contents according to the CDN information of distribution of content to UE; In the time of can avoiding source CDN can't handle this content dispense request it is carried out multistage forwarding even circulation forwarding; Effectively saved the time of process user content dispense request; Can in time return response message, thereby improve the service quality of CDN to the user.

In addition; As a specific embodiment of the present invention, in Fig. 8 and embodiment shown in Figure 9, can also comprise: what reception sources CDN sent first upgrades request; This first renewal request is sent behind cache contents by source CDN, is used to ask to upgrade the CDN information of a certain content of distribution; CDN information according to this this content of first renewal request updated stored.

Further; As a specific embodiment of the present invention; In Fig. 8 and embodiment shown in Figure 9; Can also comprise: request is upgraded in second of reception sources CDN or target CDN transmission, and second upgrades request is perhaps being sent after the UE distributing contents to the UE distributing contents time by source CDN or target CDN, is used to ask to upgrade the state information of source CDN or target CDN; Upgrade the state information of asking renewal source CDN or target CDN according to second.

In addition, as another specific embodiment of the present invention, in Fig. 8 and embodiment shown in Figure 9, before the query requests that step 601 or step 701 reception sources CDN send, can also comprise: the CDN information that generates the content of distribution UE request distribution.Particularly; Can generate the CDN information of the content of distribution UE request distribution through following mode: the content information of the CDN storage that reception CDN reports and the state information of CDN; The content information of this CDN storage and the state information of CDN generate based on content information and the state information that CC in the CDN reports, and this content information and state information are that this CC that CC collects respectively belongs to content information and the state information that CDF stores in cluster; According to this content information of each CDN storage in the CDN system and the state information of CDN, generate the CDN information of this content that distributes.

Figure 10 generates the flow chart of an embodiment of CDN information of distribution of content for the present invention.Shown in figure 10, this embodiment may further comprise the steps:

Step 801, in each CDN, each CC collects the content information and the state information of CDF storage in the cluster of place respectively, and reports the CDNC among the CDN of place.

CDNC can return the 800OK response message to CC after receiving the content information and state information of this CDF storage.

When some contents perhaps receive the control of AS to be distributed in the cluster owing to pouplarity is high; In this cluster, just can obtain this content; When some contents since pouplarity descends or the control that receives AS when being deleted by the memory space of cluster, its content of in cluster, just can't reentrying.The variation of the content information that can store with CDF of obtained STA representation of content.

Step 802, content information and state information that CDNC reports according to each CC generate the content information of place CDN storage and the state information of this CDN, and report TOP-CDNC.

CDNC analyzes it after receiving the content information and state information of CDF storage, and the content information for the CDN storage reflects just whether this content is in obtainable state in whole C DN, and need not pay close attention to its concrete distribution situation in CDN.

As specific embodiment of the present invention; CDNC can be according to predetermined period; Periodically report the content information and the state information of CDN storage to TOP-CDNC, the content information that also can only store at CDN is compared with the corresponding information that receives one of state information and last time when changing and is reported to TOP-CDNC.

TOP-CDNC can return the 800OK response message to CDNC after receiving the content information and state information of the CDN storage that this CDNC reports.

Step 803, TOP-CDNC generates the CDN information of each content that distributes according to content information of storing among each CDN and state information.

After TOP-CDNC generates the CDN information of each content that distributes, can store the CDN information of this each content of distribution, so as follow-up CDN information according to this each content that distributes, the target CDN of the content dispense request that selection processing UE sends.

Figure 11 is the structural representation of an embodiment of content delivering apparatus of the present invention, and the content delivering apparatus of this embodiment can be used as source CDN, realizes like Fig. 2 of the present invention, Fig. 4, Fig. 5 and flow process embodiment illustrated in fig. 6.Shown in figure 11, the content distribution processor device of this embodiment comprises first receiver module 901, first sending module 902 and request processing module 903.Wherein, first receiver module 901 is used to receive the content dispense request that UJE sends, and comprises the content information of request distribution in this content dispense request, and receives the target CDN relevant information that TOP-CDNC returns.First sending module 902 is used for sending query requests to TOP-CDNC, comprises the content information of UE request distribution in this query requests.In addition, as optional embodiment, first sending module 902 can be only when content delivering apparatus can't be handled the content dispense request that first receiver module 901 receives, send query requests to TOP-CDNC.Request processing module 903 is used for the target CDN relevant information that receives according to first receiver module 901, and request target CDN contents processing dispense request is to the content of its request of UE distribution.Target CDN relevant information wherein can be a target CDN information, for example: the IP address information of target CDN, mac address information, routing iinformation etc. all can localizing objects CDN information, the CDN information of the content of the UE request distribution that also distributes.When target CDN information is the CDN information of content of distribution UE request distribution; The content dispense request that first receiver module, the 901 concrete UE of reception send; The content information that comprises UE request distribution in this content dispense request; And the CDN information that receives the content of the distribution request distribution that TOP-CDNC returns, and, select to be used for the target CDN of contents processing dispense request according to the CDN information of this content that distributes.

Figure 12 is the structural representation of another embodiment of content delivering apparatus of the present invention, and among this embodiment, target CDN relevant information is a target CDN information.Compare with embodiment shown in Figure 11; Among this embodiment, request processing module 903 comprises retransmission unit 9031, is used for the target CDN information that receives according to first receiver module 901; The content dispense request is transmitted to this target CDN, so that target CDN is to UE distribution content corresponding.

Figure 13 is the structural representation of another embodiment of content delivering apparatus of the present invention, and among this embodiment, target CDN relevant information is a target CDN information.Compare with embodiment shown in Figure 11, among this embodiment, request processing module 903 comprises acquiring unit 9032 and Dispatching Unit 9033.Wherein, acquiring unit 9032 is used for the target CDN information that receives according to first receiver module 901, obtains the content of UE request distribution from target CDN.Dispatching Unit 9033 is used for according to the content dispense request, distributes the content that acquiring unit 9032 gets access to UE.

Again referring to Figure 13; As another optional embodiment of content delivering apparatus of the present invention, can also comprise buffer unit 9034 in the request processing module 903, be used for the content that buffer memory acquiring unit 9032 obtains; So that it is follow-up when receiving the content dispense request; Can directly distribute this content, and not need to obtain this content from target CDN again, can further save the time of contents processing dispense request to UE.

In addition; In the present invention's content delivering apparatus embodiment illustrated in fig. 13; First sending module 902 also is used in after the content that buffer unit 9034 buffer memory acquisition modules 9032 obtain; Send first to TOP-CDNC and upgrade request, this first upgrades request and is used to ask TOP-CDNC to upgrade the CDN information of the content that distribution acquisition module 9032 obtains.

Particularly, the CDN information of the content obtained of distribution acquisition module 9032 comprises: the CDN and the state information thereof of storing this content.Accordingly; First sending module 902 also is used at Dispatching Unit 9033 when UE distributes this content or after this content of UE distribution; Send second to TOP-CDNC and upgrade request, this second renewal request is used to ask TOP-CDNC to upgrade the state information of source CDN.

Figure 14 is the structural representation of an embodiment of source CDN choice device of the present invention, and the source CDN choice device of this embodiment can be used for realizing the flow process embodiment illustrated in fig. 7 like the present invention.Shown in Figure 141 4, the source CDN choice device of this embodiment comprises that second receiver module 1001, determination module 1002 and first select module 1003.Wherein, second receiver module 1001 is used to receive the request message that UE sends, and comprises user profile in this request message.Determination module 1002 is used for confirming according to this user profile user's ground Domain Properties.First selects module 1003 to be used for the ground Domain Properties according to this user, from the CDN system, selects a CDN corresponding with this user's ground Domain Properties, as the source CDN of the content dispense request of handling this UE transmission.

Particularly, source CDN choice device embodiment illustrated in fig. 14 can be the registrar when to the user service log-on service being provided, and also can be the application system that the user is provided business service, perhaps other communication equipment.

Figure 15 is the structural representation of an embodiment of target CDN choice device of the present invention, and the target CDN choice device of this embodiment can be used as TOP-CDNC, realizes like the present invention's flow process embodiment illustrated in fig. 8.Shown in figure 15, the target CDN choice device of this embodiment comprises that the 3rd receiver module 1101, memory module 1102, acquisition module 1103, second select the module 1104 and second sending module 1105.Wherein, the 3rd receiver module 1101 is used for the query requests that reception sources CDN sends, and comprises the content information of UE request distribution in this query requests.Memory module 1102 is used to store the CDN information of each content of distribution.Acquisition module 1103 is used for obtaining from memory module 1102 distributions the CDN information of the content of UE request distribution.Second selects module 1104 to be used for the CDN information that gets access to according to acquisition module 1103, selects the target CDN to the UE distributing contents.Second sending module 1105 is used for sending the target CDN information that the second selection module 1104 is selected to source CDN.

Figure 16 is the structural representation of another embodiment of target CDN choice device of the present invention, and the target CDN choice device of this embodiment also can be used for realizing the flow process embodiment illustrated in fig. 8 like the present invention.Compare with embodiment shown in Figure 15, the target CDN information of the distribution of content among this embodiment comprises the CDN and the state information thereof of memory contents.Accordingly; The 3rd receiver module 1101 also is used for the first renewal request that reception sources CDN sends; This first upgrades the CDN information that request is used to ask upgrade the content of distributed source CDN buffer memory; And the second renewal request of reception sources CDN or target CDN transmission, this second renewal request is used to ask to upgrade the state information of source CDN or target CDN.The target CDN choice device of this embodiment also comprises update module 1106; Be used for asking according to first renewal that the 3rd receiver module 1101 receives; Store the CDN information of corresponding contents in the updated stored module 1102, and ask the source CDN of storage in the updated stored module 1102 or the state information of target CDN according to second renewal that the 3rd receiver module 1101 receives.

Again referring to Figure 16; In the target CDN choice device of the embodiment of the invention; The 3rd receiver module 1101 also is used to receive content information that CDN reports, that this CDN stores and the state information of this CDN; Wherein, the content information of this CDN storage and the state information of this CDN generate based on content information and the state information that CC in the CDN reports, and this content information and state information are that this CC that CC collects respectively belongs to content information and the state information that CDF stores in cluster.Accordingly; The target CDN choice device of this embodiment also comprises generation module 1107; Content information that each CDN of CDN system that is used for receiving according to the 3rd receiver module 1101 stores and the state information of CDN generate the CDN information of distribution of content, and are stored in the memory module 1102.

Figure 17 is the structural representation of another embodiment of target CDN choice device of the present invention, but the target CDN choice device of this embodiment of target CDN choice device of this embodiment can be used as TOP-CDNC, realizes like the present invention's flow process embodiment illustrated in fig. 9.Shown in figure 17, the target CDN choice device of this embodiment comprises the 3rd receiver module 1101, memory module 1102, acquisition module 1103 and the 3rd sending module 1108.Wherein, the 3rd receiver module 1101 is used for the query requests that reception sources CDN sends, and comprises the content information of UE request distribution in this query requests.Memory module 1102 is used to store the CDN information of each content of distribution.Acquisition module 1103 is used for obtaining from memory module 1102 distributions the CDN information of the content of UE request distribution.The 3rd sending module 1108 is used for sending to source CDN that acquisition module is 1103 that obtain, the target CDN information of distribution of content, so that source CDN selects the target CDN to the UE distributing contents.

Figure 18 is the structural representation of another embodiment of target CDN choice device of the present invention, and the target CDN choice device of this embodiment also can be used for realizing the flow process embodiment illustrated in fig. 9 like the present invention.Compare with embodiment shown in Figure 17, the target CDN information of the distribution of content among this embodiment comprises the CDN and the state information thereof of memory contents.Accordingly; The 3rd receiver module 1101 also is used for the first renewal request that reception sources CDN sends; This first upgrades the CDN information that request is used to ask upgrade the content of distributed source CDN buffer memory; And the second renewal request of reception sources CDN or target CDN transmission, this second renewal request is used to ask to upgrade the state information of source CDN or target CDN.The target CDN choice device of this embodiment also comprises update module 1106; Be used for asking according to first renewal that the 3rd receiver module 1101 receives; Store the CDN information of corresponding contents in the updated stored module 1102, and ask the source CDN of storage in the updated stored module 1102 or the state information of target CDN according to second renewal that the 3rd receiver module 1101 receives.

Again referring to Figure 17; In the target CDN choice device of the embodiment of the invention; The 3rd receiver module 1101 also is used to receive content information that CDN reports, that this CDN stores and the state information of this CDN; Wherein, the content information of this CDN storage and the state information of this CDN generate based on content information and the state information that CC in the CDN reports, and this content information and state information are that this CC that CC collects respectively belongs to content information and the state information that CDF stores in cluster.Accordingly; The target CDN choice device of this embodiment also comprises generation module 1107; Content information that each CDN of CDN system that is used for receiving according to the 3rd receiver module 1101 stores and the state information of CDN generate the CDN information of distribution of content, and are stored in the memory module 1102.

A kind of content distribution network system that the embodiment of the invention provides can be used for realizing like Fig. 2 of the present invention, Fig. 4 and flow process embodiment illustrated in fig. 8.It comprises a TOP-CDNC and a plurality of CDN, and concrete schematic network structure can be referring to 3.Wherein, a default CDN as the content dispense request of handling the UE transmission being arranged among a plurality of CDN, also is source CDN.Source CDN is used to receive the content dispense request that UE sends, and comprises the content information of request distribution in this content dispense request; Send query requests to TOP-CDNC, comprise the content information of request distribution in this content dispense request; And receive the target CDN information that TOP-CDNC returns; According to target CDN information, request target CDN contents processing dispense request.TOP-CDNC is used to store the CDN information of each content of distribution; The query requests that reception sources CDN sends is obtained the CDN information of distribution of content; According to the CDN Information Selection of this distribution of content target CDN, and send target CDN information to source CDN to the UE distributing contents.As an alternative embodiment of the invention, source CDN can send query requests to TOP-CDNC only in the time can't handling this content dispense request.Particularly, in the CDN system of this embodiment, source CDN can pass through Figure 11, Figure 12 and content delivering apparatus embodiment illustrated in fig. 13 to be realized, TOP-CDNC can realize through Figure 15 or target CDN choice device embodiment illustrated in fig. 16.

The another kind of content distribution network system that the embodiment of the invention provides can be used for realizing the flow process like Fig. 2 of the present invention, Fig. 6 and the said embodiment of Fig. 8.It comprises a TOP-CDNC and a plurality of CDN, and concrete schematic network structure can be referring to 3.Wherein.Default CDN as the content dispense request of handling the UE transmission is arranged among a plurality of CDN, also is source CDN.Source CDN is used to receive the content dispense request that UE sends, and comprises the content information of UE request distribution in this content dispense request; Send query requests to TOP-CDNC, comprise the content information of UE request distribution in this content dispense request; And the CDN information that receives the distribution of content that TOP-CDNC returns; According to the CDN information of this distribution of content, select to be used to handle the target CDN of the content dispense request that UE sends; And according to this target CDN information, request target CDN contents processing dispense request.TOP-CDNC is used to store the CDN information of each content of distribution; The query requests that reception sources CDN sends is obtained the CDN information that distribution UE asks the content of distribution; And send the CDN information of the content of this distribution UE request distribution to this source CDN.As an alternative embodiment of the invention, source CDN can send query requests to TOP-CDNC only in the time can't handling this content dispense request.Particularly, in the CDN system of this embodiment, source CDN can realize that TOP-CDNC can realize through Figure 15 or target CDN choice device embodiment illustrated in fig. 16 through content delivering apparatus embodiment illustrated in fig. 11.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

The embodiment of the invention can be from the target CDN information of this content of TOP-CDNC inquiry distribution; According to this target CDN information; Directly select a target CDN who handles this content dispense request, and it is carried out multistage forwarding when asking this target CDN to handle this content dispense request to have avoided to handle this content dispense request even circulation is transmitted, effectively saved the time of process user content dispense request; Can in time return response message, thereby improve the service quality of CDN to the user.

In addition; The embodiment of the invention takes the decentralization method to handle the content dispense request from UE, that is: earlier by the source CDN contents processing dispense request as default CDN, TOP-CDNC is only as the Help Center; Rather than directly focus on content dispense request from UE by TOP-CDNCC; Thereby improved the performance of CDN system greatly, further saved in the source CDN poll time can't the contents processing dispense request time, improved Business Processing efficient.

It should be noted last that: above embodiment is only in order to explaining technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is specified with reference to above-mentioned preferred embodiment; Those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to spirit and the scope that replacement does not break away from technical scheme of the present invention.

Claims

1. a content distribution method is characterized in that, comprising:

Source CDN received content dispense request in the content distributing network CDN system comprises the content information that request is distributed in this content dispense request;

Said source CDN sends query requests to top content distributing network control unit TOP-CDNC, comprises the content information of described request distribution in this query requests;

Said source CDN receives the target CDN information that said TOP-CDNC returns, and said target CDN is by the CDN Information Selection of said TOP-CDNC according to the said content that distributes; Perhaps, said source CDN receives the CDN information of the said content of distribution that said TOP-CDNC returns, and said source CDN selects to be used to handle the target CDN of said content dispense request according to the CDN information of the said content that distributes;

Said source CDN obtains said content according to said target CDN information from said target CDN, and according to said content dispense request, distributes said content to user terminal;

After said target CDN obtains said content; Also comprise: the said content of buffer memory in said source CDN; And send first renewal to said TOP-CDNC and ask, said first upgrades request is used to ask said TOP-CDNC to upgrade the CDN information of the said content of distribution.

2. method according to claim 1 is characterized in that, the CDN information of the said content that distributes comprises: the CDN and the state information thereof of storing said content.

3. method according to claim 2 is characterized in that, said source CDN also comprises when user terminal is distributed said content or after distributing said content to user terminal:

Said source CDN sends second to said TOP-CDNC and upgrades request, and said second upgrades request is used to ask said TOP-CDNC to upgrade the state information of said source CDN.

4. according to any described method of claim 1 to 3, it is characterized in that, send query requests to TOP-CDNC and be specially: in the time can't handling said content dispense request, send query requests to said TOP-CDNC.

5. object content distributing network system of selection is characterized in that, comprising:

Send said target CDN information to said source CDN, obtain and the said content of buffer memory from said target CDN,, distribute said content to user terminal according to said content dispense request for said source CDN;

Said method also comprises:

Receive first of said source CDN transmission and upgrade request, said first upgrades request is sent after the said content of buffer memory by said source CDN, is used to ask to upgrade the CDN information of the said content of distribution;

Upgrade the CDN information of asking the said content of updated stored according to said first.

6. method according to claim 5 is characterized in that, the target CDN information of the said content that distributes comprises: the CDN and the state information thereof of storing said content.

7. method according to claim 6 is characterized in that, the CDN information of storing said content comprises: the correspondence relationship information between the CDN information of said content and this content of storage or the content information of each CDN and its storage.

8. method according to claim 5 is characterized in that, also comprises:

Receive the second renewal request that said source CDN or said target CDN send; Said second upgrades request is being sent when user terminal is distributed said content or after distributing said content to user terminal by said source CDN or said target CDN, is used to ask to upgrade the state information of said source CDN or said target CDN;

Upgrade the state information that said source CDN or said target CDN are upgraded in request according to said second.

9. according to any described method of claim 5 to 8, it is characterized in that, before the query requests that said reception sources CDN sends, also comprise:

Generate the CDN information of the said content that distributes.

10. method according to claim 9 is characterized in that, the distribute CDN information of said content of said generation comprises:

The content information of the CDN storage that reception CDN reports and the state information of CDN; The content information of said CDN storage and the state information of CDN generate based on content information and the state information that cluster control unit CC in the said CDN reports, and this content information and state information are that this CC that said CC collects respectively belongs to content information and the state information that content distribution function entity CDF stores in cluster;

According to the content information of each CDN storage in the CDN system and the state information of CDN, generate the CDN information of the said content that distributes.

11. object content distributing network system of selection is characterized in that, comprising:

To the target CDN information of the said content of said source CDN transmission distribution,, obtain and the said content of buffer memory from said target CDN so that said source CDN selects to distribute the target CDN of said content to said user terminal;

Said method also comprises:

12. method according to claim 11 is characterized in that, the target CDN information of the said content that distributes comprises: the CDN and the state information thereof of storing said content.

13. method according to claim 12 is characterized in that, the CDN information of storing said content comprises: the correspondence relationship information between the CDN information of said content and this content of storage or the content information of each CDN and its storage.

14. method according to claim 11 is characterized in that, also comprises:

15. according to any described method of claim 11 to 14, it is characterized in that, before the query requests that said reception sources CDN sends, also comprise:

Generate the CDN information of the said content that distributes.

16. method according to claim 15 is characterized in that, the distribute CDN information of said content of said generation comprises:

The content information of the CDN storage that reception CDN reports and the state information of CDN; The content information of said CDN storage and the state information of CDN generate based on content information and the state information that group control unit CC in the said CDN reports, and this content information and state information are that this CC that said CC collects respectively belongs to content information and the state information that content distribution function entity CDF stores in cluster; According to the content information of each CDN storage in the CDN system and the state information of CDN, generate the CDN information of the said content that distributes.

17. a content delivering apparatus is characterized in that, comprising:

Request processing module is used for according to said target CDN relevant information, asks said target CDN to handle said content dispense request;

Wherein, said target CDN relevant information is specially target CDN information; Perhaps

Said target CDN relevant information is specially the CDN information of the said content that distributes; Accordingly; The concrete received content dispense request of said first receiver module; The content information that comprises the request distribution in this content dispense request; And the CDN information that receives the said content of distribution that said TOP-CDNC returns, and, select to be used to handle the target CDN of said content dispense request according to the CDN information of the said content that distributes;

The described request processing module comprises:

Acquiring unit is used for obtaining said content according to said target CDN information from said target CDN;

Dispatching Unit is used for according to said content dispense request, distributes the said content of obtaining to user terminal;

Buffer unit is used for the said content that buffer memory obtains;

Said first sending module also is used for after the said content that said buffer unit buffer memory obtains, and sends the first renewal request to said TOP-CDNC, and said first upgrades request is used to ask said TOP-CDNC to upgrade the CDN information of the said content of distribution.

18. device according to claim 17 is characterized in that, the CDN information of the said content that distributes comprises: the CDN and the state information thereof of storing said content;

Said first sending module also is used at said Dispatching Unit when user terminal is distributed said content or after distributing said content to user terminal; Send second to said TOP-CDNC and upgrade request, said second upgrades request is used to ask said TOP-CDNC to upgrade the state information of said source CDN.

19. an object content distributing network choice device is characterized in that, comprising:

Second sending module is used for sending said target CDN information to said source CDN, obtains and the said content of buffer memory from said target CDN for said source CDN, according to said content dispense request, distributes said content to user terminal;

Said the 3rd receiver module also is used to receive first of said source CDN transmission and upgrades request, and said first upgrades the CDN information that request is used to ask to upgrade the said content of distribution;

Said device also comprises update module, is used for upgrading the CDN information of asking the said content of updated stored according to said first.

20. device according to claim 19 is characterized in that, the target CDN information of the said content that distributes comprises the CDN and the state information thereof of storing said content;

Said the 3rd receiver module also is used to receive second of said source CDN or said target CDN transmission and upgrades request, and said second upgrades the state information that request is used to ask to upgrade said source CDN or said target CDN;

Said update module also is used for upgrading the state information that said source CDN or said target CDN are upgraded in request according to said second.

21. device according to claim 20; It is characterized in that; Said the 3rd receiver module also is used to receive the content information of the CDN storage that CDN reports and the state information of CDN; The content information of said CDN storage and the state information of CDN generate based on content information and the state information that CC in the said CDN reports, and this content information and state information are that this CC that said CC collects respectively belongs to content information and the state information that CDF stores in cluster;

Said device also comprises generation module, is used for generating the CDN information of said content that distributes, and being stored in the said memory module according to the content information of each CDN storage of CDN system and the state information of CDN.

22. an object content distributing network choice device is characterized in that, comprising:

The 3rd sending module is used for the target CDN information to the said content of said source CDN transmission distribution, so that said source CDN selects to distribute the target CDN of said content to said user terminal, obtains and the said content of buffer memory from said target CDN;

23. device according to claim 22 is characterized in that, the target CDN information of the said content that distributes comprises the CDN and the state information thereof of storing said content;

24. device according to claim 23; It is characterized in that; Said the 3rd receiver module also is used to receive the content information of the CDN storage that CDN reports and the state information of CDN; The content information of said CDN storage and the state information of CDN generate based on content information and the state information that CC in the said CDN reports, and this content information and state information are that this CC that said CC collects respectively belongs to content information and the state information that CDF stores in cluster;

25. a content distribution network system is characterized in that, comprises a TOP-CDNC and a plurality of CDN, it is characterized in that, the source CDN among said a plurality of CDN is used for the received content dispense request, comprises the content information of request distribution in this content dispense request; Send query requests to said TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And receive the target CDN information that said TOP-CDNC returns; According to said target CDN information, obtain said content from said target CDN, and, distribute said content to user terminal according to said content dispense request; After said target CDN obtains said content, the said content of buffer memory in said source CDN, and send first renewal to said TOP-CDNC and ask, said first upgrades request is used to ask said TOP-CDNC to upgrade the CDN information of the said content of distribution;

Said TOP-CDNC is used to store the CDN information of each content of distribution; Receive said query requests, obtain the CDN information of the said content that distributes; The target CDN that distributes said content according to the CDN Information Selection of this said content that distributes to said user terminal; And send said target CDN information to said source CDN; Receive the first renewal request that said source CDN sends, upgrade the CDN information of asking the said content of updated stored according to said first.

26. a content distribution network system is characterized in that, comprises a TOP-CDNC and a plurality of CDN, it is characterized in that, the source CDN among said a plurality of CDN is used for the received content dispense request, comprises the content information of request distribution in this content dispense request; Send query requests to said TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And the CDN information that receives the said content of distribution that said TOP-CDNC returns; According to the CDN information of the said content that distributes, select to be used to handle the target CDN of said content dispense request; And, obtain said content, and, distribute said content to user terminal according to said content dispense request from said target CDN according to said target CDN information; After said target CDN obtains said content, the said content of buffer memory in said source CDN, and send first renewal to said TOP-CDNC and ask, said first upgrades request is used to ask said TOP-CDNC to upgrade the CDN information of the said content of distribution;

Said TOP-CDNC is used to store the CDN information of each content of distribution; Receive said query requests, obtain the CDN information of the said content that distributes; And send the CDN information of the said content that distributes to said source CDN; Receive the first renewal request that said source CDN sends, upgrade the CDN information of asking the said content of updated stored according to said first.