CN101540775A

CN101540775A - Method and device for distributing contents and network system for distributing contents

Info

Publication number: CN101540775A
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: 2009-09-23
Anticipated expiration: 2029-04-30
Also published as: WO2010124550A1; CN101540775B

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 QoS) a kind of technology that grows up for the service quality of improving internet (Internet).Its optimization by 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: with the media server distributed deployment in network, make content provide the media content that provides is provided, 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 the media content transmission delay, factors such as network jitter are to the influence of visit effect, for the user provides in order and high quality services, make the user can be with the fastest speed, the place near the user obtains required information from network.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 forms a large-scale CDN and provide service 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 controls its inner content distribution respectively as sub-CDN by CDNC.Use application system (the Application System of CDN for needs, hereinafter to be referred as: AS), for example: interconnection protocol TV (Intemet 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, the CDNC that again the content dispense request is transmitted to other sub-CDN among total CDN handles, if handling, this CDNC still can't provide service, 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 may occur the content dispense request in total CDN 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, transmit causing the multistage forwarding even the circulation of this content dispense request, 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 described TOP-CDNC returns;

Ask described target CDN to handle described 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 described TOP-CDNC, comprises the content information of described request distribution in this query requests;

Request processing module is used for according to described target CDN relevant information, asks described target CDN to handle described 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 improve 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 described content that distributes, select to distribute the target CDN of described content to described user terminal;

Send described target CDN information to described 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 described memory module the CDN information of the described content that distributes;

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

Second sending module is used for sending described target CDN information to described 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 described content of described source CDN transmission distribution, so that described source CDN selects to distribute the target CDN of described content to described 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 described content of described source CDN transmission distribution, so that described source CDN selects to distribute the target CDN of described content to described 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 described 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 described TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And receive the target CDN information that described TOP-CDNC returns; According to described target CDN information, ask described target CDN to handle described content dispense request;

Described TOP-CDNC is used to store the CDN information of each content of distribution; Receive described query requests, obtain the CDN information of the described content that distributes; The target CDN that distributes described content according to the CDN Information Selection of this described content that distributes to described user terminal; And send described target CDN information to described 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 described 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 described TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And the CDN information that receives the described content of distribution that described TOP-CDNC returns; According to the CDN information of the described content that distributes, select to be used to handle the target CDN of described content dispense request; And, ask described target CDN to handle described content dispense request according to described target CDN information;

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

The system of selection of object content distributing network and the device that provide based on the above embodiment of the present invention, 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 improve 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;

Determine described user's ground Domain Properties according to described user profile;

From the CDN system, select a CDN corresponding, as the source CDN of the content dispense request of handling described user terminal transmission with described 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 determining according to described user profile described user's ground Domain Properties;

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

Select and device based on the source contents distributing network that the above embodiment of the present invention provides, can determine the source CDN of the content dispense request that its user terminal of conduct processing sends according to user's ground Domain Properties, 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, the poll time of saving when sub-CDN can't the contents processing dispense request in the source, improve Business Processing efficient.Below by drawings and Examples, technical scheme of the present invention is described in further detail.

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 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 set 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 that this content dispense request that distributes is asked the CDN information of the content of distributing.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 source CDN handles the content dispense request of UE transmission, send query requests to TOP-CDNC, obtain the target CDN relevant information of handling this content dispense request from 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, effectively saved 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.

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 distributes the content of its request to UE, cause the conversation request of CDF to increase, increased the load of this CDF place cluster, thereby increased the load of this CDN.Whether health status identifies this CDN can operate as normal, when the load of a CDN reaches in limited time, just can not handle new content dispense request again, and it is unusual that health status may 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, default CDN itself so just can reduce when can handle the content dispense request of UE transmission, and request target CDN handles the needed time of this content dispense request, thereby save 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.

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 specific embodiment, in the step 204, source CDN can be transmitted to target CDN with this content dispense request, particularly, this content dispense request can be redirected to target CDN, also this content dispense request directly can 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 specific embodiment, in the step 204, source CDN can be according to target CDN information, and obtain the content dispense request from target CDN and ask the content of distributing, 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 content dispense request of decentralization method processing 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 the poll time when source CDN can't the contents processing dispense request, improve Business Processing efficient.

Fig. 5 is the flow chart of an Application 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 Example may further comprise the steps:

Step 301, COD AS receives the business request information that the user sends by 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 attributed region of user ID correspondence, being defined as this user provides the source CDN of service, and to the address that obtains of UE returned content, that is: the IP address of source CDNC, particularly, can by 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 that whether stores the content of user request and this source CDN 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, distributes the content of its request to UE.Afterwards, no longer carry out the follow-up flow process of present embodiment.

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

Step 307, TOP-CDNC asks the CDN information of the content of distributing according to the distribution of content dispense request, select 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 after target CDN receives the content dispense request, according to one of them CDF of the policy selection that sets in advance, is distributed the content of its request to UE.

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 place CDN system sends query requests, comprises the content information of request distribution in this query requests.

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

Step 404, source CDN asks the CDN information of the content of distributing according to the distribution of content dispense request, select 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 content dispense request of decentralization method processing 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 the poll time when source CDN can't the contents processing dispense request, improve Business Processing efficient.

As a specific embodiment, in the step 405, source CDN can be transmitted to target CDN with this content dispense request, particularly, this content dispense request can be redirected to target CDN, also this content dispense request directly can 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 specific embodiment, in the step 405, source CDN can be according to target CDN information, and obtain the content dispense request from target CDN and ask the content of distributing, 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 is 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 sending first update request to TOP-CDNC, 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 distributing the content of its request to UE, perhaps after distributing the content of its request to UE, can also send second update request to TOP-CDNC, request TOP-CDNC upgrades the state information of source CDN or target CDN so that in the follow-up flow process, TOP-CDNC more accurate CDN and state information thereof according to this content that distributes, selection is used for the target CDN of contents processing dispense request.

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 some is closed on the region, serve for an identical panel region user is divided into a CDN.Like this, when selecting default CDN, specifically can be according to user profile, for example: user's Internet protocol (internet protocol, hereinafter to be referred as: IP) address or log-on message, determine its attributed region, thereby determine the CDN in this attributed region or close on this CDN as the default CDN that service is provided.Concrete when determining default CDN, the registrar in the time of can providing the service log-on service to the user determines, 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, is determined the user's corresponding with user profile in the request message ground Domain Properties.

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

Determine 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 the poll time when source CDN can't the contents processing dispense request, 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 to distribute the target CDN of this content to UE.

Step 603 sends 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 sends 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,, cause the conversation request of CDF to increase, increased the load of this CDF place cluster, thereby increased the load of this CDN because wherein CDF distributes the content of its request to UE.Whether health status identifies this CDN can operate as normal, when the load of a CDN reaches in limited time, just can not handle new content dispense request again, and it is unusual that health status may 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: first update request that reception sources CDN sends, this first update 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 update request updated stored.

Further, as a specific embodiment of the present invention, in Fig. 8 and embodiment shown in Figure 9, can also comprise: second update request that reception sources CDN or target CDN send, second update request to the UE distributing contents time or sending, is used to ask to upgrade the state information of source CDN or target CDN by source CDN or target CDN after the UE distributing contents; Upgrade the state information of source CDN or target CDN according to second update request.

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 in the following way: the content information of the CDN storage that reception CDN reports and the state information of CDN, content information and state information generation that the content information of this CDN storage and the state information of CDN report based on CC in the CDN, this content information and state information are content information and the state information that CDF stores in this CC place cluster of collecting respectively of CC; 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.As 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 because pouplarity is high or when being subjected to the control of AS to be distributed in the cluster, in this cluster, just can obtain this content, when some contents since pouplarity descends or the control that is subjected to 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 state 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 embodiments of the invention, CDNC can be according to predetermined period, periodically report the content information and the state information of CDN storage to TOP-CDNC, also the content information that 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 that distributes, so that follow-up CDN information according to this each content that distributes, the target CDN of the content dispense request of UE transmission is handled in selection.

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 as Fig. 2 of the present invention, Fig. 4, Fig. 5 and flow process embodiment illustrated in fig. 6.As 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 distributed the content of its request to UE.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 update request to TOP-CDNC, this first update request 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 distributing this content to UE, send second update request to TOP-CDNC, this second update 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 as the present invention.Shown in Figure 141 4, the source CDN choice device of this embodiment comprises second receiver module 1001, determination module 1002 and the first selection 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 determining according to this user profile user's ground Domain Properties.The first selection module 1003 is used for the ground Domain Properties according to this user, selects a CDN corresponding with this user's ground Domain Properties from the CDN system, 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 providing the service log-on service to the user, 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 as the present invention's flow process embodiment illustrated in fig. 8.As shown in figure 15, the target CDN choice device of this embodiment comprises the 3rd receiver module 1101, memory module 1102, acquisition module 1103, the second selection 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 second target CDN information of selecting module 1104 to select 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 as 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 first update request that reception sources CDN sends, this first update request is used to ask upgrade the CDN information of the content of distributed source CDN buffer memory, and second update request of reception sources CDN or target CDN transmission, this second update 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 first update request that receives according to the 3rd receiver module 1101, the CDN information of storage corresponding contents in the updated stored module 1102, and the source CDN of storage in the second update request updated stored module 1102 that receives according to the 3rd receiver module 1101 or the state information of target CDN.

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, content information and state information generation that the content information of this CDN storage and the state information of this CDN report based on CC in the CDN, this content information and state information are content information and the state information that CDF stores in this CC place cluster of collecting respectively of CC.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 as the present invention's flow process embodiment illustrated in fig. 9.As 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 as 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 first update request that reception sources CDN sends, this first update request is used to ask upgrade the CDN information of the content of distributed source CDN buffer memory, and second update request of reception sources CDN or target CDN transmission, this second update 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 first update request that receives according to the 3rd receiver module 1101, the CDN information of storage corresponding contents in the updated stored module 1102, and the source CDN of storage in the second update request updated stored module 1102 that receives according to the 3rd receiver module 1101 or the state information of target CDN.

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, content information and state information generation that the content information of this CDN storage and the state information of this CDN report based on CC in the CDN, this content information and state information are content information and the state information that CDF stores in this CC place cluster of collecting respectively of CC.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 as 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 realization embodiment illustrated in fig. 13, and TOP-CDNC can realize by 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 as embodiment as described in Fig. 2 of the present invention, Fig. 6 and 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 by Figure 15 or target CDN choice device embodiment illustrated in fig. 16 by 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 finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out 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 is taked the content dispense request of decentralization method processing from UE, that is: earlier by 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 the poll time when source CDN can't the contents processing dispense request, improved Business Processing efficient.

It should be noted last that: above embodiment is only in order to illustrating technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is had been described in detail 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 the spirit and scope that replacement does not break away from technical solution of the present invention.

Claims

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

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

Ask described target CDN to handle described content dispense request.

2, method according to claim 1 is characterized in that, described received content dispense request is specially: the source CDN in the content distributing network CDN system receives described content dispense request;

Sending query requests to TOP-CDNC is specially: described source CDN sends query requests to described TOP-CDNC;

Receiving the target CDN relevant information that described TOP-CDNC returns comprises:

Described source CDN receives the target CDN information that described TOP-CDNC returns, and described target CDN is by the CDN Information Selection of described TOP-CDNC according to the described content that distributes; Perhaps

Described source CDN receives the CDN information of the described content of distribution that described TOP-CDNC returns; Described source CDN selects to be used to handle the target CDN of described content dispense request according to the CDN information of the described content that distributes.

3, method according to claim 2 is characterized in that, asks described target CDN to handle described content dispense request and comprises:

Described source CDN is transmitted to described target CDN according to described target CDN information with described content dispense request, so that described target CDN distributes described content according to described content dispense request to user terminal; Perhaps

Described source CDN obtains described content according to described target CDN information from described target CDN, and according to described content dispense request, distributes described content to user terminal.

4, method according to claim 3 is characterized in that, described content dispense request is transmitted to described target CDN comprises:

Described source CDN sends redirect request to described user terminal, comprises described target CDN information in this redirect request, is used to ask described user terminal that described content dispense request is redirected to described target CDN.

5, method according to claim 3, it is characterized in that, after described target CDN obtains described content, also comprise: the described content of buffer memory in described source CDN, and sending first update request to described TOP-CDNC, described first update request is used to ask described TOP-CDNC to upgrade and distributes the CDN information of described content.

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

7, method according to claim 6 is characterized in that, described source CDN also comprises when user terminal is distributed described content or after distributing described content to user terminal:

Described source CDN sends second update request to described TOP-CDNC, and described second update request is used to ask described TOP-CDNC to upgrade the state information of described source CDN.

8, according to any described method of claim 1 to 7, it is characterized in that, send query requests to TOP-CDNC and be specially: in the time can't handling described content dispense request, send query requests to described TOP-CDNC.

9, a kind of source contents distributing network system of selection is characterized in that, comprising:

10, method according to claim 9 is characterized in that, described request message comprises login request message or business request information.

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

Send described target CDN information to described source CDN.

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

13, method according to claim 12 is characterized in that, the CDN information of storing described content comprises: the correspondence relationship information between the CDN information of described 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.

14, method according to claim 12 is characterized in that, also comprises:

Receive first update request that described source CDN sends, described first update request is sent after the described content of buffer memory by described source CDN, is used to ask to upgrade the CDN information of the described content of distribution;

CDN information according to the described content of the described first update request updated stored.

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

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

Upgrade the state information of described source CDN or described target CDN according to described second update request.

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

Generate the CDN information of the described content that distributes.

17, method according to claim 16 is characterized in that, the distribute CDN information of described content of described generation comprises:

The content information of the CDN storage that reception CDN reports and the state information of CDN, content information and state information generation that the content information of described CDN storage and the state information of CDN report based on cluster control unit CC in the described CDN, this content information and state information are content information and the state information that content distribution function entity CDF stores in this CC place cluster of collecting respectively of described CC;

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 described content that distributes.

18, a kind of object content distributing network system of selection is characterized in that, comprising:

19, method according to claim 18 is characterized in that, the target CDN information of the described content that distributes comprises: the CDN and the state information thereof of storing described content.

20, method according to claim 19 is characterized in that, the CDN information of storing described content comprises: the correspondence relationship information between the CDN information of described 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.

21, the method for stating according to claim 18 is characterized in that, also comprises:

22, method according to claim 21 is characterized in that, also comprises:

23, according to any described method of claim 18 to 22, it is characterized in that, before the query requests that described reception sources CDN sends, also comprise:

Generate the CDN information of the described content that distributes.

24, method according to claim 23 is characterized in that, the distribute CDN information of described content of described generation comprises:

The content information of the CDN storage that reception CDN reports and the state information of CDN, content information and state information generation that the content information of described CDN storage and the state information of CDN report based on group control unit CC in the described CDN, this content information and state information are content information and the state information that content distribution function entity CDF stores in this CC place cluster of collecting respectively of described CC; 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 described content that distributes.

25, a kind of content delivering apparatus is characterized in that, comprising:

26, device according to claim 25 is characterized in that, described target CDN relevant information is specially target CDN information; Perhaps

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

27, device according to claim 26 is characterized in that, the described request processing module comprises retransmission unit, is used for according to described target CDN information described content dispense request being transmitted to described target CDN.

28, device according to claim 26 is characterized in that, the described request processing module comprises:

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

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

29, device according to claim 28 is characterized in that, also comprises:

Buffer unit is used for the described content that buffer memory obtains.

30, device according to claim 29, it is characterized in that, described first sending module also is used for after the described content that described buffer unit buffer memory obtains, send first update request to described TOP-CDNC, described first update request is used to ask described TOP-CDNC to upgrade the CDN information of the described content of distribution.

31, device according to claim 30 is characterized in that, the CDN information of the described content that distributes comprises: the CDN and the state information thereof of storing described content;

Described first sending module also is used at described Dispatching Unit when user terminal is distributed described content or after distributing described content to user terminal, send second update request to described TOP-CDNC, described second update request is used to ask described TOP-CDNC to upgrade the state information of described source CDN.

32, a kind of source contents distributing network choice device is characterized in that, comprising:

33, a kind of object content distributing network choice device is characterized in that, comprising:

34, device according to claim 33 is characterized in that, the target CDN information of the described content that distributes comprises the CDN and the state information thereof of storing described content;

Described the 3rd receiver module also is used to receive first update request that described source CDN sends, described first update request is used to ask to upgrade the CDN information of the described content of distribution, and second update request that receives described source CDN or described target CDN transmission, described second update request is used to ask to upgrade the state information of described source CDN or described target CDN;

Described device also comprises update module, is used for the CDN information according to the described content of the described first update request updated stored, and the state information of upgrading described source CDN or described target CDN according to described second update request.

35, device according to claim 34, it is characterized in that, described 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, content information and state information generation that the content information of described CDN storage and the state information of CDN report based on CC in the described CDN, this content information and state information are content information and the state information that CDF stores in this CC place cluster of collecting respectively of described CC;

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

36, a kind of object content distributing network choice device is characterized in that, comprising:

37, device according to claim 36 is characterized in that, the target CDN information of the described content that distributes comprises the CDN and the state information thereof of storing described content;

38, according to the described device of claim 37, it is characterized in that, state the 3rd receiver module and also be used to receive the content information of the CDN storage that CDN reports and the state information of CDN, content information and state information generation that the content information of described CDN storage and the state information of CDN report based on CC in the described CDN, this content information and state information are content information and the state information that CDF stores in this CC place cluster of collecting respectively of described CC;

39, a kind of 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 described 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 described TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And receive the target CDN information that described TOP-CDNC returns; According to described target CDN information, ask described target CDN to handle described content dispense request;

40, a kind of 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 described 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 described TOP-CDNC, comprise the content information of described request distribution in this content dispense request; And the CDN information that receives the described content of distribution that described TOP-CDNC returns; According to the CDN information of the described content that distributes, select to be used to handle the target CDN of described content dispense request; And, ask described target CDN to handle described content dispense request according to described target CDN information;