CN102065107A - Peer-to-peer universal content delivery network and content caching method - Google Patents
Peer-to-peer universal content delivery network and content caching method Download PDFInfo
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- CN102065107A CN102065107A CN2009102236412A CN200910223641A CN102065107A CN 102065107 A CN102065107 A CN 102065107A CN 2009102236412 A CN2009102236412 A CN 2009102236412A CN 200910223641 A CN200910223641 A CN 200910223641A CN 102065107 A CN102065107 A CN 102065107A
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Abstract
The invention discloses a peer-to-peer universal content delivery network (CDN) and a content caching method. The method comprises that: an access CDN server of user equipment (UE) receives a content position request from the UE, wherein the content position request carries identification of requested contents; the access CDN server acquires position information of the contents; and the access CDN server determines that the contents are not cached at the local place, and downloads and caches the contents according to the position information. According to the CDN and the method, the caching flow of the contents can be simplified, and the efficiency of a system can be improved.
Description
Technical field
The present invention relates to communication and technical field of the computer network, in particular to a kind of reciprocity Versatile content distribution platform and content buffering method.
Background technology
The purpose that content distribution platform (Content Delivery Network abbreviates CDN as) proposes is in order to extenuate the pressure that user and professional growth bring to network, to enjoy good service quality to guarantee the user who is distributed in each corner of network.CDN by with content caching at network edge, thereby reduced flow by network backbone, saved the cost of operator's dilatation, also improved the speed of user capture content.
At present, the content distribution platform can be supported polytype content distributions such as Streaming Media, improve internet television (Internet Protocol Television or Interactive Personal Television, abbreviate IPTV as), video request program (Video on Demand, abbreviate VoD as), professional service quality such as Online Music, and optimize these professional flows.In existing content distribution platform, usually by Virtual network operator as content distribution platform supplier, the unified content distribution platform by the server structure is provided, support flow optimization and high quality services quality (Quality of Service, abbreviate QoS as), the content distribution platform is distributed to network edge with content, and the content distribution platform of users from networks operator obtains content-data.
As shown in Figure 1, in order to strengthen reliability and autgmentability, point-to-point (Point To Point abbreviates P2P as) technology has been used to set up the reciprocity Versatile content distribution platform (being called P2P CDN) of contents such as supporting Streaming Media and file.As shown in Figure 1, in existing reciprocity Versatile content distribution platform, the CDN server is divided into location-server and caching server, and a CDN server can only provide content location or buffer memory service to subscriber equipment (User Equipment abbreviates UE as).Particularly, when UE need be when reciprocity Versatile content divides platform to download content, UE is earlier from location-server locating content position, and then downloads content from the position of caching server or other memory contentss.
The umber of content caching is that increase with the popularity degree of content increases in existing P 2P CDN, Fig. 2 is for increasing the flow chart of the buffer memory umber of content among the existing P2P CDN, as shown in Figure 2, in the prior art, location-server is by receiving the locating query request of UE to certain content, the popularity degree of this content of perception, if judging the popularity degree of this content, location-server increases, need to increase the buffer memory umber, then this location-server is sought the not caching server of this content of buffer memory in P2PCDN, and to the not caching server transmission instruction of this content of buffer memory, indicating not, the caching server of this content of buffer memory goes to download and this content of buffer memory.
By flow process shown in Figure 2 as can be known, in the prior art, when the location-server judgement needs to increase the buffer memory of certain content, need remove to seek a caching server of not storing this content, go to download this content at this caching server of indication then and carry out buffer memory, the flow process that increases buffer memory is comparatively complicated, and location-server need just can find the not caching server of certain content of buffer memory by Signalling exchange repeatedly, thereby has reduced the efficient that increases buffer memory.
Summary of the invention
At in the prior art owing to location-server and caching server be separated cause increasing buffer memory flow process comparatively complicated problems the present invention is proposed, for this reason, main purpose of the present invention is to provide a kind of reciprocity Versatile content distribution platform system and content download method, one of to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, provide a kind of reciprocity Versatile content distribution platform, be applied to comprise the content delivering system of content source node.
Reciprocity Versatile content distribution platform according to the present invention comprises: a plurality of content distribution platform CDN servers, wherein, part or all of CDN server in a plurality of CDN servers is formed the reciprocity overlay network of reciprocity Versatile content distribution platform system, above-mentioned a plurality of CDN server comprises: a CDN server, be used for subscriber equipment is linked into reciprocity Versatile content distribution platform, when the positional information of user equipment requests content, the positional information of this content of storage is provided to subscriber equipment, and under the situation of determining local not this content of buffer memory, download and this content of buffer memory; The 2nd CDN server is used for content source node is linked into reciprocity Versatile content distribution platform.
Further, above-mentioned reciprocity overlay network is used to adopt the distributed storage mode memory contents memory location tabulation of equity, wherein, the tabulation of this content location is used for the positional information of node of the one or more contents of storage of recorded content dissemination system, wherein, above-mentioned node comprises one of following or its combination in any: CDN server, content source node, subscriber equipment.
Particularly, an above-mentioned CDN server can comprise: receiver module is used to receive the request of the positional information of subscriber equipment query contents and this content; Acquisition module is used to obtain the positional information of this content; First judge module, be used to judge a CDN server this locality whether buffer memory this content, being judged as under the situation not, trigger download module; Download module is used for the positional information obtained according to acquisition module, downloads foregoing, and with this content caching to local.
Further, an above-mentioned CDN server can also comprise: second judge module is used for need judging whether the buffer memory foregoing according to pre-conditioned, if then trigger download module.
Further, an above-mentioned CDN server can also comprise: update module is used to utilize the content location tabulation of the updating location information equity overlay network storage of a CDN server.
Further, above-mentioned acquisition module comprises: judging unit is used to judge whether a CDN server this locality is cached with the positional information of foregoing, if then trigger the positional information that acquiring unit obtains this content of local cache; Otherwise, trigger acquiring unit obtains this content from the content location tabulation of reciprocity overlay network storage positional information; Acquiring unit is used to obtain the positional information of the foregoing of local cache, or obtains the positional information of this content from the content location tabulation of reciprocity overlay network storage.
Further, an above-mentioned CDN server can also comprise: cache module is used for the positional information of the foregoing that the buffer memory acquiring unit obtains from the content location tabulation of reciprocity overlay network storage.
To achieve these goals, according to a further aspect in the invention, provide a kind of content buffering method, this method is used for the CDN server buffer content of reciprocity Versatile content distribution platform.
Content buffering method according to the present invention comprises: the access CDN server of subscriber equipment receives the location of content request from subscriber equipment, wherein, carries the sign of the content of request to some extent in this location of content request; Insert the positional information that the CDN server obtains this content; Insert the CDN server and determine that this locality does not have this content of buffer memory, download and this content of buffer memory according to above-mentioned positional information.
Particularly, insert the positional information that the CDN server obtains foregoing and comprise: insert the CDN server and judge the local positional information that whether is cached with this content, if then obtain the positional information of this content of local cache; Otherwise, insert the CDN server obtains this content from the content location tabulation of the reciprocity overlay network storage of reciprocity Versatile content distribution platform positional information.
Further, access CDN server obtained the positional information of foregoing from the content location tabulation after, this method also comprised: the positional information of this content that access CDN server buffer obtains.
Further, insert the CDN server according to before above-mentioned positional information download and the buffer memory foregoing, this method also comprises: insert the CDN server according to pre-conditioned, determine this content of buffer memory.
Preferably, above-mentioned pre-conditioned one of following or its combination in any that comprises: insert the number of times that the CDN server receives this content of request and surpass predetermined threshold value; Inserting the remaining memory space of CDN server can this content of buffer memory; The quantity of the node of this content of storage does not reach preset value in the content delivering system; The node distribution of current this content of storage is unreasonable in the content delivering system, need insert this content of CDN server buffer;
Wherein, above-mentioned node comprises one of following or its combination in any: CDN server, content source node and subscriber equipment.
Further, after inserting CDN download and buffer memory foregoing, this method also comprises: the content location that inserts the updating location information equity overlay network storage of this access of CDN server by utilizing CDN server is tabulated.
Preferably, the positional information of foregoing comprises: store the positional information of the node of this content, wherein, above-mentioned node comprises: CDN server, content source node and subscriber equipment;
Then after access CDN server obtained the positional information of this content, this method also comprised: insert the CDN server returns positional information from the part or all of node of this content of storage to subscriber equipment.
By the present invention, a CDN server is located and the buffer memory service for UE provides content simultaneously, thereby can simplify the flow process of content caching, and then improves the efficient of system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the configuration diagram according to the P2P CDN of correlation technique;
Fig. 2 is the flow chart according to the buffer memory umber of the increase content of correlation technique;
Fig. 3 is the configuration diagram according to a kind of reciprocity Versatile content distribution platform of the embodiment of the invention;
Fig. 4 is the configuration diagram according to the another kind of reciprocity Versatile content distribution platform of the embodiment of the invention;
Fig. 5 is the structural representation according to a CDN server of the embodiment of the invention;
Fig. 6 is the structural representation according to another kind the one CDN server of the embodiment of the invention;
Fig. 7 is the structural representation according to another CDN server of the embodiment of the invention;
Fig. 8 is the flow chart according to the content buffering method of the embodiment of the invention;
Fig. 9 is the flow chart of embodiment one;
Figure 10 is the flow chart of embodiment two.
Embodiment
Functional overview
The embodiment of the invention has proposed a kind of improvement P2P CDN and content buffering method at the flow process complicated problems of storing in the prior art need increase the umber of content caching in P2P CDN the time.In embodiments of the present invention, location-server in the prior art and caching server unification are provided with, the function of content location and content caching is provided for UE by a CDN server, the access CDN server of UE is when the location of content request that receives UE, if the local content that does not have this UE of buffer memory to be asked, then can and be cached to this CDN server, thereby simplify the flow process of content caching, improve the efficient of system this content download.
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
According to the embodiment of the invention, at first provide a kind of reciprocity Versatile content distribution platform.
Fig. 3 and Fig. 4 are the configuration diagram according to the reciprocity Versatile content distribution platform of the embodiment of the invention, as shown in Figure 3 and Figure 4, reciprocity Versatile content distribution platform according to the embodiment of the invention is made up of a plurality of CDN servers, and each CDN server can both provide the function of content location and content caching simultaneously.
Wherein, all above-mentioned a plurality of CDN servers of (as shown in Figure 3) or part (as shown in Figure 4) are formed the P2P overlay network, if partial C DN server is formed the P2P overlay network, then remaining CDN server is the client of P2P overlay network.
In Fig. 3, all CDN servers are reciprocity fully, specifically can adopt the RELOAD agreement to form reciprocity overlay network, and the access CDN server of subscriber equipment are all in reciprocity overlay network.
In 4 figure, the CDN server is divided into two-stage: portion C DN server is formed reciprocity overlay network, specifically can adopt the RELOAD agreement to form; All the other CDN servers are clients of reciprocity overlay network, and these CDN servers can adopt RELOAD protocol access equity overlay network.In this case, the access CDN server of subscriber equipment can also can be used as the CDN server of the client of reciprocity overlay network in reciprocity overlay network.
And, above-mentioned a plurality of CDN server comprises: a CDN server, be used for subscriber equipment is linked into reciprocity Versatile content distribution platform, when the position of user equipment requests content, the positional information of this content of storage is provided to subscriber equipment, and, download and this content of buffer memory determining local not this content of buffer memory and needing under the situation of this content of buffer memory; The 2nd CDN server is used for content source node is linked into reciprocity Versatile content distribution platform.
In embodiments of the present invention, the P2P overlay network uses the distributed storage mode of P2P to come the content location tabulation of storage system, particularly, this content location tabulation comprises: the positional information of storing the node of the one or more contents of storage in the current content delivering system, wherein, node comprise among the following three one of or its combination in any: CDN server, content source node, subscriber equipment; Positional information can be IP addresses of nodes or identification information etc. in specific implementation process, and, the sign that can adopt content and the corresponding relation of the positional information of the node of this content of storage write down the positional information of the node of each content of storage, for example, if 5 contents have been stored up in coexistence in the current content delivering system, then as shown in table 1, write down the positional information of the node of storing each content in the tabulation of this content location:
Table 1.
| The sign of content | The positional information of node |
| 000001 | A |
| 000002 | B |
| 000003 | C |
| 000004 | D |
| 000005 | F |
Further, as shown in Figure 5, an above-mentioned CDN server can comprise: receiver module 51, first judge module 53, acquisition module 55 and download module 57.Wherein, receiver module 51 is used to receive the request that subscriber equipment is inquired about the positional information of foregoing and this content; Acquisition module 55 is used to obtain the positional information of foregoing; First judge module 53 is connected with receiver module 51, is used to judge whether a CDN server this locality is cached with foregoing, being judged as under the situation not, triggers download module 57; Download module 57 is used for downloading this content according to above-mentioned positional information, and this content caching is arrived local.
In concrete the application, download module 57 can not have the situation of buffer memory foregoing in a CDN server this locality, directly downloading and this content of buffer memory, also can be to satisfy to trigger download module 57 again under the situation of some condition and download and buffer memory, therefore, as shown in Figure 5, the one CDN server can also comprise: second judge module 58 is used for need judging whether the buffer memory foregoing according to pre-conditioned, be judged as under the situation that is, triggering download module 57 again and download and buffer memory.
In specific implementation process, above-mentionedly pre-conditionedly include but not limited to one of following or its combination in any:
Whether the number of times that (1) the one CDN server receives UE request foregoing surpasses predetermined threshold value, and promptly the popularity degree according to this content judges whether this content of buffer memory, if determine that this content is popular, then determining should this content of buffer memory, triggers download module 57;
Whether the remaining memory space of (2) the one CDN servers can this content of buffer memory, promptly judge according to the storage capacity of a CDN server self, if the remaining memory space of a current CDN server is greater than preset value, then determining should this content of buffer memory, triggers download module 57;
(3) whether the quantity of node of this content of storage reaches preset value in the content delivering system, and promptly quantity and the ability according to the node of current this content of storage judges whether this content of buffer memory, if then trigger download module 57;
(4) whether the node distribution of current this content of storage is reasonable in the content delivering system, whether the node of this content of i.e. judgement storage is all concentrated and is positioned at some zone, and do not have node to store this content in some zone, and download module 57 is then triggered in the zone that a CDN server location does not have or seldom node is stored this content.
In specific implementation process, the one CDN server is receiving the positional information that certain UE asks certain content for the first time, after getting access to the positional information of this content from the P2P overlay network, this positional information can be cached to this locality, follow-up when receiving the position requests of this content, can directly get access to the positional information of this content from this locality, therefore, as shown in Figure 6, the acquisition module 53 of an above-mentioned CDN server may further include: judging unit 531, be used to judge whether a CDN server this locality is cached with the positional information of this content, if then trigger the positional information that acquiring unit 533 obtains this content of local cache; Otherwise, trigger acquiring unit 533 obtains this content from the foregoing memory location tabulation of reciprocity overlay network storage positional information; Acquiring unit 533 is used to obtain the positional information of this content of local cache, or obtains the positional information of this content from the foregoing memory location tabulation of reciprocity overlay network storage.
Further, if acquiring unit 533 is positional informations of obtaining this content from the foregoing memory location tabulation of reciprocity overlay network storage, then a CDN server can also be stored the positional information of this content of obtaining, therefore, the one CDN server can further include: cache module 59 is used for the positional information of the foregoing that buffer memory acquiring unit 533 obtains from the foregoing memory location tabulation of reciprocity overlay network storage.
Preferably, as shown in Figure 7, the one CDN server can also comprise: update module 50, be used to utilize the foregoing memory location tabulation of the above-mentioned reciprocity overlay network storage of updating location information of a CDN server, particularly, can in the tabulation of foregoing memory location, increase the positional information of a CDN server in this content-location information of record.
In specific implementation process, above-mentioned P2P overlay network can use standardized RELOAD agreement to make up, thereby can be so that each manufacturer develops interconnecting of node.Wherein, the RELOAD agreement is a kind of P2P agreement of IETF P2PSIP working group definition.It mainly adopts distributed hashtable DHT algorithm, and P2P algorithm that also can other non-DHT can provide the maintenance and the distributed data access function of P2P overlay network.
According to the embodiment of the invention, a kind of content buffering method also is provided, this method is used for the CDN server buffer content of reciprocity Versatile content distribution platform.
Fig. 8 is the flow chart according to the content buffering method of the embodiment of the invention, as shown in Figure 8, mainly may further comprise the steps (step S801-step S805) according to the content buffering method of the embodiment of the invention:
Step S801: the access CDN server of subscriber equipment receives the location of content request from this subscriber equipment, wherein, carries the sign of the content of request to some extent in this location of content request;
Step S803: insert the positional information that the CDN server obtains this content;
Particularly, insert the CDN server when obtaining the positional information of this content, at first judge the local positional information that whether is cached with this content, if then obtain the positional information of this content of local cache; Otherwise, insert the CDN server obtains this content from the content location tabulation of the reciprocity overlay network storage of reciprocity Versatile content distribution platform positional information.
Particularly, foregoing memory location list records the positional information of node of each content of storage in the content delivering system, wherein, the node of memory contents comprises one of following or its combination in any: CDN server, content source node, subscriber equipment.
And, after from the tabulation of the content location of reciprocity overlay network, obtaining the positional information of this content, insert the positional information of this content that the CDN server can also buffer memory obtains.
Step S805: insert the CDN server and determine that this locality does not have this content of buffer memory, download and this content of buffer memory according to above-mentioned positional information.
Inserting the CDN server can not have under the situation of this content of buffer memory in definite this locality, directly downloads and this content of buffer memory, can satisfy under the pre-conditioned situation yet, determines this content of buffer memory.Particularly, this pre-conditionedly includes but not limited to one of following or its combination in any:
(1) whether the number of times that inserts this content of CDN server reception request is promptly judged according to the popularity degree of this content above predetermined threshold value, if ask the number of times of this content to surpass predetermined threshold value, very flow process of this content is described, then determines this content of buffer memory;
Whether can buffer memory this content, promptly judge according to self storage capacity that inserts the CDN server if (2) inserting the remaining memory space of CDN server, can this content of buffer memory if insert the remaining memory space of CDN server, then determine this content of buffer memory;
(3) whether the quantity of the node of this content of storage reaches preset value in the content delivering system, if do not have, then determines this content of buffer memory;
(4) whether the node distribution of current this content of storage is reasonable in the content delivering system, if unreasonable, and need insert this content of CDN server buffer at this, then determine this content of buffer memory.
Wherein, above-mentioned node comprises one of following or its combination in any: CDN server, content source node and subscriber equipment.
And, for can inquiring in this access CDN server, the node of this content of subsequent download is cached with this content, after with foregoing download and buffer memory, access CDN server can join its positional information in the foregoing memory location tabulation of P2P overlay network preservation.
And, insert the CDN server after obtaining the positional information of foregoing, to return response message to subscriber equipment, the positional information of this content that inquiry is obtained returns to subscriber equipment, in specific implementation process, insert the CDN server and the positional information of storing all nodes of this content can be returned to subscriber equipment, also the positional information of storing the part of nodes of this content can be returned to subscriber equipment.
In order further to understand the embodiment of the invention, the foregoing caching method that the embodiment of the invention provides is described below by specific embodiment.
In the following embodiments, be that example describes with the RELOAD agreement as the networking agreement of P2P overlay network, Store and Fetch are the methods that is respectively applied for storage and reading of data resource in the RELOAD overlay network that defines in the RELOAD agreement.
In the following examples, the node (being the node of memory contents) that has content may comprise one of following three kinds of nodes or its combination in any: CDN server, content source node, UE.In the following examples, suppose that the node of being ready to upload content and storing this content joins self-position in the location of content tabulation by the Store method of RELOAD.Thereby make and to inquire the node listing that has certain content by the Fetch method of RELOAD.
And, in the following embodiments, suppose that UE is linked into CDN server in the content distribution platform by flow processs such as a series of location, login, authentications, can obtain to insert the address of CDN server by modes such as DNS, manual configuration, access servers.And, in the following embodiments, suppose that UE has obtained the essential information of content by approach such as portal websites.
And in the following embodiments, UE can insert by a CDN server of forming in the reciprocity overlay network, also can pass through the CDN server access as the client of reciprocity overlay network.
Embodiment one
Fig. 9 is that subscriber equipment is by the flow chart of visit CDN server triggers content caching in the present embodiment, and as shown in Figure 9, subscriber equipment mainly may further comprise the steps by visit CDN server triggers content caching in the present embodiment:
Step 901, UE is to inserting CDN server requests location of content, and wherein, the content that UE asked can be a Streaming Media, a file, also can be a fragment of Streaming Media or file;
Step 902 inserts the CDN server and determines that this locality does not have the content that buffer memory UE asked and the position of this content, inserts the CDN server and adopts the Fetch method of RELOAD agreement to inquire about the memory location of this content to the P2P overlay network;
Step 903, the P2P overlay network is to the memory location of inserting CDN server returned content.
Step 904 inserts the memory location that the CDN server returns suddenly according to previous step, downloads content and buffer memory from one or more node of storing this content;
In this step, insert the memory location that the CDN server also can this content of buffer memory.Can directly offer the UE of the same location of content of subsequent query in the memory location of local cache.Other UE inquire about the position of same content afterwards, and inserting the CDN server does not need from P2P overlay network query contents position, directly can return cache in the memory location of this locality.
Step 905-906 inserts Store method that the CDN server adopts the RELOAD agreement its positional information is joined in the content location tabulation that the P2P overlay network preserves, so that follow-uply want that the node of downloading this content can inquire this CDN server;
Step 907 inserts the CDN server to the memory location that UE returns foregoing, wherein, can comprise the positional information that inserts CDN server self in the memory location of returning;
Step 908, UE downloads content according to the memory location of the rapid content that obtains of previous step from one or more node of storing this content.
In step 907, the positional information of the node of this content of storage of the part that access CDN server also can only return, thus can reduce message size, with conserve network resources.
In the above-mentioned steps, step 904,905-906,907 do not have sequencing in time, can carry out any one step wherein earlier, any both or three wherein can be carried out simultaneously yet.
Because above-mentioned steps 904 is in the local cache content, thereby increased the storage umber of this content in the content distribution platform, the content of buffer memory can offer the UE or the CDN server of the same content of subsequent download, and then can support more UE or this content of CDN server access.
Before carrying out above-mentioned steps 904, insert the buffer memory that the CDN server can judge whether to increase the content that UE asks according to one of following factor or its combination in any: the popularity degree of this content, insert the ability of aspects such as CDN server self storage, at present have the node of this content quantity and ability, have the distribution situation on network of the node of this content.Insert the CDN server when determining not increase buffer memory, do not carry out and carry out above-mentioned steps 904-906.
Embodiment two
In an embodiment, at UE2 before CDN server requests location of content, UE1 is to this this location of content of CDN server requests, and, this location of content of buffer memory in the CDN server, and when UE1 request content position, the CDN server is according to above-mentioned factor, determining does not increase buffer memory, therefore, is not cached with this content in this CDN server.
Figure 10 is the flow chart of UE2 visit CDN server triggers content caching in the present embodiment, and as shown in figure 10, the CDN of UE2 visit in the present embodiment articles for use trigger content caching and mainly may further comprise the steps:
Step 101-105, similar to the foregoing description one, UE1 is to inserting a certain location of content of CDN server lookup, and this location of content that should insert the CDN server buffer, but do not have this content of buffer memory;
Step 106, UE2 is to inserting the same location of content of CDN server lookup;
Step 107, insert CDN server this locality buffer memory the location of content that UE2 asked, according to content location, insert the CDN server and download content and buffer memory from the node of one or more these contents of storage;
Step 108-109 inserts Store method that the CDN server adopts the RELOAD agreement self address is joined in the content location tabulation that the P2P overlay network preserves, and makes follow-up other want that the node of downloading this content can inquire this CDN server;
Step 110 inserts the CDN server to UE2 returned content memory location, wherein can comprise the address of inserting CDN server self;
Step 111, UE2 downloads content according to the rapid content location that obtains of previous step from the node of one or more memory contents.
Need to prove, can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
As mentioned above, by adopting a CDN server, can simplify the flow process of content caching, thereby improve the efficient of system simultaneously for UE provides content location and buffer memory service.And, in this embodiment, insert the CDN server the time to UE returned content position, can be only to the positional information of UE returning part, thereby reduce the size of message, improve the utilance of network.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. reciprocity Versatile content distribution platform, be applied to comprise the content delivering system of content source node, it is characterized in that, described reciprocity Versatile content distribution platform comprises: a plurality of content distribution platform CDN servers, wherein, part or all of CDN server in described a plurality of CDN server is formed the reciprocity overlay network of described reciprocity Versatile content distribution platform system, and described a plurality of CDN servers comprise:
The one CDN server, be used for subscriber equipment is linked into described reciprocity Versatile content distribution platform, when the positional information of described user equipment requests content, the positional information of the described content of storage is provided to described subscriber equipment, and under the situation of determining the local not described content of buffer memory, download and the described content of buffer memory;
The 2nd CDN server is used for described content source node is linked into described reciprocity Versatile content distribution platform.
2. reciprocity Versatile content distribution platform according to claim 1, it is characterized in that, described reciprocity overlay network is used to adopt the distributed storage mode memory contents memory location tabulation of equity, wherein, the tabulation of described content location is used for writing down the positional information of node of the one or more contents of storage of described content delivering system, wherein, described node comprises one of following or its combination in any: CDN server, content source node, subscriber equipment.
3. reciprocity Versatile content distribution platform according to claim 1 and 2 is characterized in that, a described CDN server comprises:
Receiver module is used to receive the request that described subscriber equipment is inquired about the positional information of described content and described content;
Acquisition module is used to obtain the positional information of described content;
First judge module, be used to judge described CDN server this locality whether buffer memory described content, being judged as under the situation not, trigger download module;
Described download module is used for the described positional information obtained according to described acquisition module, downloads described content, and with described content caching to local.
4. reciprocity Versatile content distribution platform according to claim 3 is characterized in that, a described CDN server also comprises:
Second judge module is used for according to pre-conditioned, need to judge whether the described content of buffer memory, if then trigger download module.
5. reciprocity Versatile content distribution platform according to claim 3 is characterized in that, a described CDN server also comprises:
Update module is used to utilize the described content location tabulation of the described reciprocity overlay network storage of updating location information of a described CDN server.
6. reciprocity Versatile content distribution platform according to claim 3 is characterized in that described acquisition module comprises:
Judging unit is used to judge whether described CDN server this locality is cached with the positional information of described content, if then trigger the positional information that acquiring unit obtains the described content of local cache; Otherwise, trigger described acquiring unit obtains described content from the described content location tabulation of described reciprocity overlay network storage positional information;
Described acquiring unit is used to obtain the positional information of the described content of local cache, or obtains the positional information of described content from the described content location tabulation of described reciprocity overlay network storage.
7. reciprocity Versatile content distribution platform according to claim 6 is characterized in that, a described CDN server also comprises:
Cache module is used for the positional information of the described content that the described acquiring unit of buffer memory obtains from the described content location tabulation of described reciprocity overlay network storage.
8. content buffering method is used for the CDN server buffer content of reciprocity Versatile content distribution platform, it is characterized in that described method comprises:
The access CDN server of subscriber equipment receives the location of content request from described subscriber equipment, wherein, carries the sign of the content of request to some extent in the described location of content request;
Described access CDN server obtains the positional information of described content;
Described access CDN server determines that this locality does not have the described content of buffer memory, downloads and the described content of buffer memory according to described positional information.
9. method according to claim 8 is characterized in that, the positional information that described access CDN server obtains described content comprises:
Described access CDN server is judged the local positional information that whether is cached with described content, if then obtain the positional information of the described content of local cache; Otherwise,
Described access CDN server obtains the positional information of described content from the content location tabulation of the reciprocity overlay network storage of reciprocity Versatile content distribution platform.
10. method according to claim 9 is characterized in that, described access CDN server obtained the positional information of described content from described content location tabulation after, described method also comprised:
The positional information of the described content that described access CDN server buffer obtains.
11. method according to claim 8 is characterized in that, described access CDN server is according to before described positional information download and the described content of buffer memory, and described method also comprises:
Described access CDN server is determined the described content of buffer memory according to pre-conditioned.
12. method according to claim 11 is characterized in that, describedly pre-conditionedly comprises one of following or its combination in any:
The number of times that described access CDN server receives the described content of request surpasses predetermined threshold value;
The remaining memory space of described access CDN server can the described content of buffer memory;
The quantity of the node of the described content of storage does not reach preset value in the described content delivering system;
The node distribution of the described content of current storage is unreasonable in the described content delivering system, need be in described this content of access CDN server buffer;
Wherein, described node comprises one of following or its combination in any: CDN server, content source node and subscriber equipment.
13. method according to claim 8 is characterized in that, after described access CDN download and the described content of buffer memory, described method also comprises:
The described content location tabulation of the described reciprocity overlay network storage of updating location information of the described access of described access CDN server by utilizing CDN server.
14. method according to claim 8 is characterized in that, the positional information of described content comprises: store the positional information of the node of described content, wherein, described node comprises: CDN server, content source node and subscriber equipment;
After described access CDN server obtained the positional information of described content, described method also comprised:
Described access CDN server returns the positional information of the part or all of node of the described content of storage to described subscriber equipment.
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