CN104320681A - CDN back-to-source service method and system - Google Patents
CDN back-to-source service method and system Download PDFInfo
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- CN104320681A CN104320681A CN201410625250.4A CN201410625250A CN104320681A CN 104320681 A CN104320681 A CN 104320681A CN 201410625250 A CN201410625250 A CN 201410625250A CN 104320681 A CN104320681 A CN 104320681A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/858—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot
- H04N21/8586—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot by using a URL
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Abstract
The invention provides a CDN back-to-source service method and system, and the CDN back-to-source service method and system are suitable for being used in the technical field of communication. The method includes the steps that a content request carrying the content identification of the content on the content providing network side is received from a client; the content identification is parsed from the content request, and the back-to-source address query interface of the content providing network is called according to the content identification to inquire for the back-to-source address of the content, and the back-to-source operation is executed according to the back-to-source address. By means of the CDN back-to-source service method and system, a network operator can be helped to introduce a plurality of CDN software and device providers, meanwhile, the distribution efficiency of the content among systems between a content provider and the network operator is improved, the risk of reforming the existing system by the network operator is lowered, and the medium resource file transmission can be better finished.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the method and system that a kind of CDN returns source service.
Background technology
OTT TV (Over The Top TV) refers to the Video service based on open the Internet, and terminal can be television set, computer, Set Top Box, PAD, smart mobile phone etc.B2B (Business-to-business e-commerce model, B2B pattern) refer to marketing relationship between business to business, it is by intranet, combined closely by B2B websites and client, by the fast reaction of network, for client provides better service, thus the business development of promoting enterprise.B2B OTT TV is content supplier (ICP, Internet Content Provider) and the television services carried out on the internet of Virtual network operator cooperation, integrate the multiple technologies such as multimedia, communication, provide live by the Internet towards television terminal, review, the system of the various video service such as program request and application, system, for the network characteristics of the Internet, have employed the multiple internet video technology such as multi code Rate of Chinese character network self-adapting, video segment.Whole internet television system is made up of content supplier's Content Management System, Virtual network operator CDN (Content Distribution Network, content distributing network), terminal and business management system.Content distributing network is the key component forming internet television business, and operator's investment is large, require linear extendible capacity, classification is disposed, can be met business flexible development.
In the content delivery of traditional Virtual network operator and content supplier, continue to use the pattern that content is injected, taken following steps: 1, content supplier has provided distribution platform according to the matchmaker of the interface notification Virtual network operator of arranging with Virtual network operator and carries out content and reach the standard grade.2, the matchmaker of Virtual network operator provides distribution platform and resolves the download address of the acquisition of information in interface to content.3, the matchmaker of Virtual network operator provides the storage key in CDN node that distribution platform content of announcement provider corresponds to.4, content supplier carries out content and to reach the standard grade process.5, operator is according to the download address got in step 2, carries out the download work of media file corresponding to content.Known according to above description, network operator system have employed strict injection way, namely content must ready on the CDN of Virtual network operator after could provide service for user, content is once reach the standard grade, then the CDN that corresponding media file must reside in Virtual network operator for a long time stores.
Along with the development of technology and business, the demand of new CDN technology is introduced also in continuous lifting to Virtual network operator.Current with HLS (HTTP Live streaming, Streaming Media based on HTTP) progressively replacing existing program request technology for the dynamic code rate technology of representative, under the technical system of HLS, the content of an each code check of video can be cut into hundreds and thousands of video file sections, in the case, if continue to continue to use the system docking that existing injection way realizes between content supplier and Virtual network operator, so dock complexity, what the stability of a system and content were reached the standard grade ageingly has very large problem, business for the content requirements and operator that meet user is carried out considerable influence.Therefore need to adopt back source module to replace existing injection way to be very important in the new CDN node introduced, if but the new CDN node introduced adopts on Hui Yuan to the existing CDN of Virtual network operator, following a few problem can be brought: existing CDN belongs to online service (for user provides service) system, provide back source service certainly will affect streaming quality for user provides; Need to carry out the system reform to existing CDN, to support back source technology, but the difficulty of original system transformation and dangerous; Because History of conservancy is invested, existing CDN can not be discarded, require that original CDN and newly-built CDN coexists, simultaneously development service.
In summary, obviously there is inconvenience and defect in actual use in prior art, so be necessary to be improved.
Summary of the invention
For above-mentioned defect, a kind of CDN is the object of the present invention is to provide to return the method and system of source service, it can help Virtual network operator to introduce many CDN softwares and equipment supplier, improve the distribution efficiency of content between system between content supplier and Virtual network operator simultaneously, reduce the risk that Virtual network operator is transformed existed system, complete the transmission that matchmaker provides file better.
To achieve these goals, the invention provides a kind of method that CDN returns source service, comprising:
Receive from client and carry the content requests of content in the content identification of content provider network side;
From described content requests, parse described content identification, and according to described content identification call described content provider network return source address query interface inquire about described content return source address;
Source operation is performed back according to described time source address.
The present invention also provides a kind of CDN to return the system of source service, and comprise client, content distributing network and content provider network, described content distributing network comprises CDN and returns source service node,
Described client is used for returning source service node transmission to described CDN and carries the content requests of content in the content identification of content provider network side;
Described CDN returns source service node for receiving described content requests and parse described content identification from described content requests, and according to described content identification call described content provider network return that source address query interface inquires about described content return source address, and described CDN returns source service node also operates for performing go back to source according to described go back to source address.
In the present invention, content supplier is without the need to realizing the CND node of content injection network operator by complicated interactive interfacing, only need content supplier will return source request address and be supplied to Virtual network operator CDN node by interface, the CDN node of Virtual network operator carries out back source operation from crossing this time source address, obtain content from the source service node of content supplier and be transmitted to client again, Virtual network operator is helped to introduce many CDN softwares and equipment supplier, improve the distribution efficiency of content between system between content supplier and Virtual network operator simultaneously, reduce the risk of network operator system transformation, reduce the degree of coupling of system and the complexity of docking between content supplier and Virtual network operator simultaneously, shorten the docking cycle, ensure that the Quick thread of content, complete the transmission that matchmaker provides file better, the content requirements of user can be met better.
Accompanying drawing explanation
Fig. 1 is the theory diagram that a kind of CDN of the present invention returns the system of source service;
Fig. 2 is the system architecture that CDN of the present invention returns a kind of embodiment of system of source service;
Fig. 3 carries out the interaction diagrams that CDN returns source service in an embodiment of the present invention;
Fig. 4 is the flow chart that a kind of CDN of the present invention returns the method for source service.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In the application one typically configuration, the equipment of terminal, service network and trusted party include one or more processor (CPU), input/output interface, network interface and internal memory.
Internal memory may comprise the volatile memory in computer-readable medium, and the forms such as random access memory (RAM) and/or Nonvolatile memory, as read-only memory (ROM) or flash memory (flash RAM).Internal memory is the example of computer-readable medium.
Computer-readable medium comprises permanent and impermanency, removable and non-removable media can be stored to realize information by any method or technology.Information can be computer-readable instruction, data structure, the module of program or other data.The example of the storage medium of computer comprises, but be not limited to phase transition internal memory (PRAM), static RAM (SRAM), dynamic random access memory (DRAM), the random access memory (RAM) of other types, read-only memory (ROM), Electrically Erasable Read Only Memory (EEPROM), fast flash memory bank or other memory techniques, read-only optical disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tape, tape magnetic rigid disk stores or other magnetic storage apparatus or any other non-transmitting medium, can be used for storing the information can accessed by computing equipment.According to defining herein, computer-readable medium does not comprise non-temporary computer readable media (transitory media), as data-signal and the carrier wave of modulation.
Fig. 1 is the theory diagram that a kind of CDN of the present invention returns the system of source service, and this system 100 comprises client 10, content distributing network 20 and content provider network 30, and content distributing network 20 comprises CDN and returns source service node 21.Content provider network 30 also comprises electric program menu service entities 31, index service entity 32 and source service node 33.
Client 10 carries the content requests of content in content provider network 30 side content identification for sending to CDN service node 21.Concrete, user selects playing stream media file at the EPG (Electronic Program Guide, electric program menu) of content supplier.Electric program menu service entities 31 generates program request URL according to content play request and is sent to client 10.Client 10 obtains content index file according to program request URL from index service entity 32, and content index file comprises the access information of the index file of sub-content, includes content identification in the access information of the index file of sub-content.Client 10 is also for resolving content index file and generating content request, and content requests carries index file solicited message and the content identification of sub-content.In stream media technology, the content of an each code check of video can be cut into hundreds and thousands of video files sections, and this video file is cut into slices the sub-content be in the present invention.
CDN returns source service node 21 for receiving content requests and parse content identification from content requests, and according to content identification call content provider network return source address query interface query contents return source address, and CDN returns source service node 21 also performs go back to source operate according to returning source address.Concrete, inject the stage in content, content distributing network 20 can identify to content provider network 30 by returned content, and content provider network 30 stores the corresponding relation of the content of content provider network 30 side and the content identification of content distributing network 20.Content provider network 30 can attach content identification when the sub-content index file hyperlink request of generation.And the content requests of client 10 carries index file solicited message and the content identification of sub-content, content distributing network 20 is when calling back source address query interface, content identification can be brought, content provider network 30 is according to the corresponding relation of the content of content identification and content distributing network 20, get the content that content identification is corresponding in content provider network 30 side, then the CDN time source address information in this content being returned to content distributing network 20 returns source service node 21.
In the operation of the source of returning, CDN returns source service node 40 obtains content sub-content from source service node 33, and sub-content is sent to client 10.Concrete, CDN returns source service node 21 obtains sub-content from index service entity 32 index file according to time source address, and the index file of sub-content is sent to client 10; Client 10 is also for resolving the index file information of sub-content and generating the broadcast address information of sub-content; CDN returns source service node 21 and receives the sub-content requests that client sends according to the broadcast address information of sub-content, and obtain sub-content according to sub-content requests from source service node 33, and sub-content is sent to client 10, finally realize Hui Yuan and be operating as user service is provided.
CDN returns the index file information of the source service node 21 sub-content of buffer memory, sub-content in the process of the source of returning operation, thus when other clients 10 send request for identical content, need not carry out back source operation and directly return source service node 21 by content from CDN and send to client 10, matchmaker provides file can be transferred to client 10 faster.
In the present invention, content supplier is without the need to realizing the CND node of the injection network operator of content by complicated interactive interfacing, only need content supplier will return source request address and be supplied to Virtual network operator CDN node by interface, the CDN node of Virtual network operator carries out back source operation from crossing this time source address, obtains content be transmitted to client again from the source service node of content supplier.Main purpose due to this programme solves in old CDN node, smoothly can increasing new CDN fringe node (being built by other CDN equipment vendors) and solve the mode of new CDN fringe node by Hui Yuan directly to CDN source last time of content service provider simultaneously, not needing the CDN equipment to having built to adjust.The present invention helps Virtual network operator to introduce many CDN softwares and equipment supplier, improve the distribution efficiency of content between system between content supplier and Virtual network operator simultaneously, reduce the risk of network operator system transformation, reduce the degree of coupling of system and the complexity of docking between content supplier and Virtual network operator simultaneously, shorten the docking cycle, ensure that the Quick thread of content, complete the transmission that matchmaker provides file better, the content requirements of user can be met better.
In the present invention, it is comprise newly-increased center service node and edge service node that CDN returns source service node 21, possesses back source service function.Old CDN node cannot support the Hui Yuan of HLS, owing to there is multiple index file and the section of a large amount of contents in HLS, old CDN cannot well not support do technological transformation, and because realize back source function more complicated on old center service node, transformation difficulty has a big risk, and will affect existing service.The present invention provides back source to serve by newly-increased center service node.This newly-increased center service node not user oriented provides order program service, and it mainly provides data and the source of returning service to edge service node.And edge service node contains original CDN edge service node and the CDN edge service node newly-increased to node dilatation.
In general, old and new users is different grouping, different groupings is by different CDN node services, user old is in the present invention assigned to existing edge C DN node, the user of new increment is assigned to newly-increased edge C DN node, GSLB (Global Server Load Balance, the GSLB) module schedules of content distributing network 20 can be dispatched according to subsidiary user profile on the http address of request.
Being directly be dispatched on original CDN edge service node for the request from old user, is be dispatched on newly-increased CDN edge service node for the request Added User.General suggestion is that user directly accesses newly-increased CDN edge service node.In the access entrance link of the index file of the sub-content providing network 20 business side to generate in content service, contain content identification and user profile and user login information, according to these information, the GSLB module of content distributing network 20 can determine that user be dispatched on original CDN edge service node or newly-increased CDN edge service node.In addition, because edge service node storage total amount is less, delete so content can be done to eliminate, memory access speed here, but the amount stored can be less, and Centroid belongs to central store, can retain all contents, belong to and store greatly, but the access speed stored is general, can not directly for user provide service, but he can avoid repeatedly the problem of Hui Yuan to content and service provider.
In the present invention, content distributing network 20 is when receiving the content requests of index file solicited message and the content identification carrying sub-content, usually first this content requests is dispensed to edge service node, if edge service node does not preserve content, then edge service node obtains content from newly-increased center service node, if newly-increased center service node does not also store content, then this newly-increased center service node provides back source to serve.For existing edge C DN node, because content have employed traditional injection mode, so the problem of not hitting content can not be there is, so for existing edge C DN node, be to arrive newly-increased Centroid Hui Yuan, only have newly-increased fringe node just when content is not hit to newly-increased Centroid request Hui Yuan.
Fig. 2 is the system architecture that CDN of the present invention returns a kind of embodiment of system of source service.As shown in Figure 2, this framework comprises the content provider network 30 of content supplier, the content distributing network 20 of Internet service provider and Set Top Box STB 40.The content provider network 30 of this content supplier comprises: content management entity 34, source service node 33 and electric program menu service entities 31.The content distributing network 20 of Internet service provider comprises: matchmaker provides platform 22, dissemination system 23, GSLB (Global Server Load Balance, GSLB) dispatching patcher 24, original matchmaker provides service node 25, newly-built matchmaker provides service node 26.
Matchmaker is provided file and injects content distributing network 20 by content provider network 30, when content distributing network 20 receives Set Top Box STB 40 streaming media service request, if content distributing network 20 this matchmaker of buffer memory provides file, then provide service node 25 from original matchmaker and matchmaker provided file send to Set Top Box STB 40; If this matchmaker of the non-buffer memory of content distributing network 20 provides file, then provide service node content identification by matchmaker to return interface and inquire about back source address to content provider network 30, providing service node 26 by newly-built matchmaker provides back source to serve to obtain matchmaker from source service node 33 and provides file and return to Set Top Box STB 40.Wherein, content identification returns interface is that CDI information that the platform content of announcement of Virtual network operator is corresponding is to content service provider; Return source address query interface be the platform of Virtual network operator go query contents in the system of content service provider side return source address, for follow-up pull media file and M3U8 file service.So both are different, be the submodule mutual with external system being under the jurisdiction of Content Management System on the whole.
Fig. 3 carries out the interaction diagrams that CDN returns source service in an embodiment of the present invention, this flow process comprises:
Step S301, user is at the upper on-demand content of the terminal APK (AndroidPackage, Android installation kit) of content supplier.
Step S302, content supplier EPG are to the one-level M3U8 entry address of terminal APK returned content.In HLS scheme, the suffix name of index file is generally " .m3u8 ", and one-level M3U8 entry address is foregoing content indexing entry address herein.
Step S303, the terminal APK of content supplier calls terminal player.
Step S304, terminal player obtains one-level M3U8 file to the M3U8Service place of content supplier.This M3U8Service is foregoing index service entity 32, and this one-level M3U8 file is the index file of foregoing content.
Step S305, the M3U8Service of content supplier returns one-level M3U8 file.Save the entry address of secondary M3U8 file in this one-level M3U8 file, the entry address of this secondary M3U8 file is the access information of the index file of foregoing sub-content.The entry address of secondary M3U8 file includes the content identification of contents provider side, and this content identification is specially CPI information.In the entry address of secondary M3U8 file, contain content identification and user profile and user login information, according to these information, the GSLB module of content distributing network 20 can determine that user be dispatched on original CDN edge service node or newly-increased CDN edge service node.
Step S306, terminal player chooses the entry address of the secondary M3U8 file comprised in the one-level M3U8 of suitable code check according to terminal and network condition thereof.Based on the situation of vedio layering coding, same video comprises the lower layering of resolution and the higher layering of resolution, if the network condition of terminal is not good, or the screen resolution of terminal is told somebody what one's real intentions are, then can select the individual-layer data that resolution is lower.The entry address of the secondary M3U8 file that each individual-layer data is corresponding different in the present invention, and terminal player selects the entry address of suitable secondary M3U8 file according to bandwidth condition and quality of service requirement.
Step S307, terminal player to the GSLB place of Virtual network operator, acquisition request secondary M3U8 file.GSLB realizes the flow allocating between the service node of the upper different geographical of wide area network (comprising the Internet), ensures to use best serving node services from oneself nearest client, thus guarantees to access quality.In general,
Step S308, the GSLB of Virtual network operator, by HTTP Code 302, returns to the secondary M3U8 document entry address in the original CDN node of Virtual network operator.
Step S309, the secondary M3U8 document entry address that terminal player root node returns according to 302, goes to obtain secondary M3U8 file on the original CDN node of Virtual network operator.
Step S310, the original CDN node of Virtual network operator checks whether the secondary M3U8 file of corresponding content has done buffer memory.Be enter step S311, otherwise enter step S312.
Step S311, the original CDN node of Virtual network operator returns secondary M3U8 file.
Step S312, the original CDN node of Virtual network operator obtains secondary M3U8 file to the newly-built CDN node place of Virtual network operator.
Step S313, the newly-built CDN node of Virtual network operator checks whether the secondary M3U8 file of corresponding content has done buffer memory.Be enter step S314, otherwise enter step S315.
Step S314, the newly-built CDN node of Virtual network operator returns secondary M3U8 file.
Step S315, CDI (content identification of the Virtual network operator side) information in the newly-built CDN node analysis request of Virtual network operator.
Step S316, the newly-built CDN node of Virtual network operator calls time source address of the CDI Service acquisition content of content supplier.
Step S317, time source address of the CDI Service returned content of content supplier.
Step S318, the newly-built CDN node of Virtual network operator obtains secondary M3U8 file to the M3U8Service place of content supplier.
Step S319, the secondary M3U8 file that the M3U8Service returned content of content supplier is corresponding.
Step S320, Virtual network operator newly-built CDN node buffer memory secondary M3U8 file.
Step S321, the newly-built CDN node of Virtual network operator returns secondary M3U8 file to the original CDN node of Virtual network operator.
Step S322, Virtual network operator original CDN node buffer memory secondary M3U8 file.
Step S323, the original CDN node of Virtual network operator returns secondary M3U8 file to terminal player.
Final Virtual network operator province node server address after step S324, terminal player record GSLB 302 redirect.It is the Edge Server nearest apart from terminal that this final Virtual network operator economizes node.
Step S325, terminal player resolves secondary M3U8 file, obtains TS sheet relative address.Because the suffix of existing streaming media video file section is " .ts ", adopting TS sheet to represent the section of this streaming media video file herein, is also foregoing sub-content.
Step S326, the broadcast address of terminal generating video file TS.This broadcast address=the S23 walks the address+TS sheet relative address obtained.
Step S327, terminal player is cut into slices to Virtual network operator newly-built CDN node request TS.
Step S328, whether the newly-built CDN node of Virtual network operator checks TS section buffer memory, if non-buffer memory, enter step S329, buffer memory then enters step S336.
Step S329, the section of the newly-built CDN node of Virtual network operator non-buffer memory is then to acquisition request TS section in the newly-built CDN node of Virtual network operator.
Step S330, the newly-built CDN node inspection section of Virtual network operator whether buffer memory.If non-buffer memory, enters step S330, if buffer memory, enter step S333.
Step S331, non-buffer memory is then cut into slices to the request on the service node of source of returning of content supplier.
Step S332, the source service node that returns of content supplier returns TS section.
Step S333, Virtual network operator newly-built CDN node buffer memory TS cut into slices.
Step S334, the newly-built CDN node of Virtual network operator returns TS section to the original CDN node of Virtual network operator.
Step S335, Virtual network operator original CDN node buffer memory TS cut into slices.
Step S336, the original CDN node of Virtual network operator returns TS section to terminal player.
Step S337, terminal player plays TS section.Cut into slices because files in stream media exists multiple TS simultaneously, therefore need, to the process circulated between execution step S226 to step S337 to each TS sheet relative address of resolving in secondary M3U8 literary composition, until travel through complete, to complete the broadcasting of whole files in stream media.
Fig. 4 is the flow chart that a kind of CDN of the present invention returns the method for source service, and this flow process is realized by system as shown in Figure 1, and this flow process comprises:
Step S401, receives from client and carries the content requests of content in the content identification of content provider network side.This step is realized by CDN service node 21 as shown in Figure 1.
Step S402, parses content identification from content requests, and calls time source address of returning source address query interface query contents of content provider network according to content identification.This step is realized by CDN service node 21 as shown in Figure 1.
Step S403, performs back source operation according to returning source address.This step is realized by CDN service node 21 as shown in Figure 1.Concrete, the step performing back source operation according to time source address comprises: the sub-content obtaining content from the source service node of content provider network, and sub-content is sent to client.Also comprised before the source service node of content provider network obtains the step of the sub-content of content: the index file obtaining sub-content according to time source address from index service entity, and the index file of sub-content is sent to client; Client is resolved the index file information of sub-content and is generated the broadcast address information of sub-content; Receive the sub-content requests that client sends according to the broadcast address information of sub-content.
Preferably, carry content from client reception and also comprised before the step of the content requests of content provider network side content identification: generate program request URL according to content play request and be sent to client, program request URL content identifies; Client obtains content index file according to program request URL from the index service entity of content provider network, and content index file comprises the access information of the index file of sub-content; Client resolves content index file and generating content request, and content requests carries the index file solicited message of sub-content.
Preferably, this flow process also comprises: the index file information of the sub-content of buffer memory, sub-content.
In sum, the present invention can help Virtual network operator to introduce many CDN softwares and equipment supplier, improve the distribution efficiency of content between system between content supplier and Virtual network operator simultaneously, reduce the risk of network operator system transformation, reduce the degree of coupling of system and the complexity of docking between content supplier and Virtual network operator simultaneously, shorten the docking cycle, ensure that the Quick thread of content, complete the transmission that matchmaker provides file better, the content requirements of user can be met better.
It should be noted that the present invention can be implemented in the assembly of software and/or software restraint, such as, application-specific integrated circuit (ASIC) (ASIC), general object computer or any other similar hardware device can be adopted to realize.In one embodiment, software program of the present invention can perform to realize step mentioned above or function by processor.Similarly, software program of the present invention (comprising relevant data structure) can be stored in computer readable recording medium storing program for performing, such as, and RAM memory, magnetic or CD-ROM driver or floppy disc and similar devices.In addition, steps more of the present invention or function can adopt hardware to realize, such as, as coordinating with processor thus performing the circuit of each step or function.
In addition, a part of the present invention can be applied to computer program, such as computer program instructions, when it is performed by computer, by the operation of this computer, can call or provide according to method of the present invention and/or technical scheme.And call the program command of method of the present invention, may be stored in fixing or moveable recording medium, and/or be transmitted by the data flow in broadcast or other signal bearing medias, and/or be stored in the working storage of the computer equipment run according to described program command.At this, comprise a device according to one embodiment of present invention, this device comprises the memory for storing computer program instructions and the processor for execution of program instructions, wherein, when this computer program instructions is performed by this processor, trigger this plant running based on the aforementioned method according to multiple embodiment of the present invention and/or technical scheme.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (10)
1. CDN returns a method for source service, it is characterized in that, comprising:
Receive from client and carry the content requests of content in the content identification of content provider network side;
From described content requests, parse described content identification, and according to described content identification call described content provider network return source address query interface inquire about described content return source address;
Source operation is performed back according to described time source address.
2. method according to claim 1, it is characterized in that, the step performing back source operation according to described time source address comprises: the sub-content obtaining described content from the source service node of described content provider network, and described sub-content is sent to described client.
3. method according to claim 2, is characterized in that, carries content also comprised before the step of the content requests of content provider network side content identification from client reception:
Generate program request URL according to content play request and be sent to described client;
Described client obtains content index file according to described program request URL from the index service entity of described content provider network, described content index file comprises the access information of the index file of described sub-content, comprises described content identification in the access information of the index file of described sub-content;
Described client is resolved described content index file and is generated described content requests, and described content requests carries the index file solicited message of described sub-content and described content identification.
4. method according to claim 3, is characterized in that, also comprises before obtaining the step of the sub-content of described content from the source service node of described content provider network:
Obtain the index file of described sub-content according to described time source address from described index service entity, and the index file of described sub-content is sent to described client;
Described client is resolved the index file information of described sub-content and is generated the broadcast address information of described sub-content;
Receive the sub-content requests that described client sends according to the broadcast address information of described sub-content.
5. method according to claim 4, is characterized in that, described method also comprises:
The index file information of sub-content, described sub-content described in buffer memory.
6. CDN returns a system for source service, and it is characterized in that, comprise client, content distributing network and content provider network, described content distributing network comprises CDN and returns source service node,
Described client is used for returning source service node transmission to described CDN and carries the content requests of content in the content identification of content provider network side;
Described CDN returns source service node for receiving described content requests and parse described content identification from described content requests, and according to described content identification call described content provider network return that source address query interface inquires about described content return source address, and described CDN returns source service node also operates for performing go back to source according to described go back to source address.
7. system according to claim 6, it is characterized in that, described content provider network comprises source service node, and described CDN returns source service node also for obtaining the sub-content of described content from described source service node, and described sub-content is sent to described client.
8. system according to claim 7, it is characterized in that, described content provider network also comprises electric program menu service entities and index service entity, and described electric program menu service entities is used for generating program request URL according to content play request and being sent to described client;
Described client is also for obtaining content index file according to described program request URL from described index service entity, described content index file comprises the access information of the index file of described sub-content, and the access information of the index file of described sub-content comprises described content identification;
Described client is also for resolving described content index file and generating described content requests, and described content requests carries the index file solicited message of described sub-content and described content identification.
9. system according to claim 8, it is characterized in that, described CDN returns source service node also for obtaining the index file of described sub-content from described index service entity according to described time source address, and the index file of described sub-content is sent to described client;
Described client is also for resolving the index file information of described sub-content and generating the broadcast address information of described sub-content;
Described CDN returns source service node also for receiving the sub-content requests that described client sends according to the broadcast address information of described sub-content.
10. system according to claim 9, is characterized in that, described CDN returns source service node also for the index file information of content sub-described in buffer memory, described sub-content.
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