CN101237418A - Stream media acceleration system, method and device based on content distribution network - Google Patents
Stream media acceleration system, method and device based on content distribution network Download PDFInfo
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Abstract
The embodiment of the invention discloses a streaming media accelerating system based on a content delivery network (CDN), which relates to the streaming media application field and is used for solving the problem of the poor reliability of a streaming media accelerating proposal of the CDN in the prior art. The system comprises top-layer streaming media accelerating equipment and underlayer streaming media accelerating equipment; the top-layer streaming media accelerating equipment is used for receiving a streaming media acquire request from the underlayer streaming media accelerating equipment, acquiring streaming media data from a data source station or other streaming media accelerating equipment of the top layer and sending the acquired streaming media data to the underlayer streaming media accelerating equipment; the underlayer streaming media accelerating equipment is used for receiving a streaming media acquire request from a user, acquiring the streaming media data from the top-layer streaming media accelerating equipment or other streaming media accelerating equipment of the underlayer and sending the acquired streaming media data to the user. The embodiment of the invention also discloses a streaming media transmission method based on the streaming media accelerating system and streaming media accelerating equipment. The invention is adopted to greatly improve the reliability of the streaming media accelerating system.
Description
Technical field
The present invention relates to the Streaming Media application, relate in particular to a kind of stream media acceleration system, method and apparatus of content-based distributing network.
Background technology
Along with popularizing of broadband, Streaming Media is used and has been obtained fast development.Traditional by ICP (Internet Content Provider, ICP) directly provide streaming media service, concrete, ICP sets up physical node (ICP website) in one or a few place, this physical node directly orients towards the whole country and even the Global Internet user provides streaming media service, and promptly all Internet users obtain stream medium data from these physical nodes.
Above-mentionedly directly provide the problem of streaming media service to be by ICP, the physical site number that ICP disposes is very limited, and the service bandwidth of each physical node also is limited, when a large number of users is visited physical site simultaneously, user capture can occur and experience decline, even situation about can't visit.In addition, user distribution is in extensive range, and for distance physical site user far away, the transport stream media data can produce bigger transmission delay and network jitter.
For fear of the existence of the problems referred to above, (Content DistributionNetwork CDN) carries out the distribution of stream medium data to adopt content distributing network at present.
CDN is one deck overlay network of setting up on basis, existing the Internet, by disposing some CDN service equipments throughout the country, utilize existing the Internet to carry out the distribution of stream medium data efficiently, its know-why is, stream medium data is pushed on a large amount of CDN service equipments from the ICP website, and the user visits needed stream medium data from CDN service equipment nearby.
It is the important application of CDN that Streaming Media quickens, and can be good at supporting ICP to carry out large-scale streaming media service.
At present, as shown in Figure 1, the CDN service equipment adopts general Streaming Media acceleration equipment, thereby realizes that Streaming Media quickens.It is standard media player that the Streaming Media acceleration equipment is equivalent to the upper strata from function, lower floor is the normal stream media server, the Streaming Media that this equipment is accepted the user obtains request, the streaming media server as data source obtains stream medium data in the visit data source station then, at last this stream medium data is transmitted to the user.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following technical problem:
Existing Streaming Media speeding scheme reliability is relatively poor, concrete, all Streaming Media acceleration equipments all obtain stream medium data by direct access data sources, and the quantity of data source is very limited, can't guarantee the link bandwidth of Streaming Media acceleration equipment, thereby may cause certain customers' watching quality to descend to data source; In addition, dispose more Streaming Media acceleration equipment and may be crushed in the data source station, cause whole system to stop service.
Summary of the invention
The embodiment of the invention provides a kind of stream media acceleration system, method and apparatus of content-based distributing network, in order to solve the problem of the Streaming Media speeding scheme poor reliability of content distributing network in the prior art.
The embodiment of the invention provides a kind of stream media acceleration system of content-based distributing network, and this system comprises:
The Streaming Media acceleration equipment of top layer, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request, from the data source station or other Streaming Media acceleration equipment of this layer obtain stream medium data, the stream medium data that gets access to is sent to described underflow medium acceleration equipment;
The Streaming Media acceleration equipment of bottom, the Streaming Media that is used to receive from the user obtains request, obtains stream medium data from upper stream medium acceleration equipment or other Streaming Media acceleration equipment of this layer, and the stream medium data that gets access to is sent to described user.
The embodiment of the invention provides a kind of flow-medium transmission method based on described stream media acceleration system, and this method comprises:
The Streaming Media acceleration equipment receives Streaming Media and obtains request;
Determine from the residing level of described stream media acceleration system according to system architecture information, according to definite result by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments;
The stream medium data that gets access to is offered the equipment of these data of request.
The embodiment of the invention provides a kind of Streaming Media acceleration equipment, and this equipment comprises:
Processing unit is used for receiving stream media and obtains request;
Request unit is used for determining from the residing level of stream media acceleration system according to system architecture information, according to definite result by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments;
Retransmission unit is used for the described stream medium data that gets access to is offered the equipment of asking these data.
Among the present invention, the Streaming Media acceleration equipment is disposed in the stream media acceleration system layering, the Streaming Media acceleration equipment of top layer can be from the data source station or is obtained stream medium data with other Streaming Media acceleration equipments of layer, and the Streaming Media acceleration equipment of bottom obtains stream medium data from the upper strata or with other Streaming Media acceleration equipments of layer.As seen, in the stream media acceleration system of described layer architecture, upper stream medium acceleration equipment can be underflow medium acceleration equipment stream medium data is provided, with also carrying out data interaction between the laminar flow medium acceleration equipment, reduced pressure to the data source station, can guarantee that stream media acceleration system provides stable stream medium data for the user, gets reliability thereby improved accelerating system greatly.
Description of drawings
Fig. 1 is the structural representation that Streaming Media quickens platform in the prior art;
Fig. 2 is the structural representation of system that the embodiment of the invention provides;
Fig. 3 is the schematic flow sheet of method that the embodiment of the invention provides;
Fig. 4 is for carrying out the system configuration schematic diagram of area dividing in the embodiment of the invention;
Fig. 5 provides the schematic flow sheet of method example for the embodiment of the invention;
Fig. 6 provides the schematic flow sheet of method example for the embodiment of the invention;
Fig. 7 is the structural representation of equipment that the embodiment of the invention provides.
Embodiment
In order to improve the reliability of Streaming Media speeding scheme among the CDN, the embodiment of the invention provides a kind of stream media acceleration system based on CDN, the Streaming Media acceleration equipment is disposed in layering in the native system, the Streaming Media acceleration equipment of top layer can be from the data source station or is obtained stream medium data with other Streaming Media acceleration equipments of layer, and the Streaming Media acceleration equipment of intermediate layer and bottom obtains stream medium data from the upper strata or with other Streaming Media acceleration equipments of layer.
Referring to Fig. 2, the stream media acceleration system based on CDN that the embodiment of the invention provides adopts extendible layer architecture, and promptly this system comprises two-layerly at least, and every layer is deployed with one or more Streaming Media acceleration equipments, and,
The Streaming Media acceleration equipment 20 of top layer, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request, from the data source station or other Streaming Media acceleration equipment of this layer obtain stream medium data, the stream medium data that gets access to is sent to described underflow medium acceleration equipment;
The Streaming Media acceleration equipment 21 in intermediate layer, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request, obtain stream medium data from upper stream medium acceleration equipment or other Streaming Media acceleration equipment of this layer, the stream medium data that gets access to is sent to described underflow medium acceleration equipment; The Streaming Media acceleration equipment in intermediate layer can comprise one or more layers, certainly, when being double-layer structure in system, does not comprise the intermediate layer;
Simultaneously, the Streaming Media acceleration equipment in intermediate layer also receives upper stream medium acceleration equipment and transmits the stream medium data that gets off, and transmit this stream medium data to the Streaming Media acceleration equipment of bottom, by the Streaming Media acceleration equipment of bottom this stream medium data is sent to the user;
The Streaming Media acceleration equipment 22 of bottom, the Streaming Media that is used to receive from the user obtains request, obtains stream medium data from upper stream medium acceleration equipment or other Streaming Media acceleration equipment of this layer, and the stream medium data that gets access to is sent to described user;
Simultaneously, the Streaming Media acceleration equipment of bottom also will receive upper stream medium acceleration equipment and transmit the stream medium data that gets off, and this stream medium data be sent to the user of these data of request.
Concrete, the Streaming Media acceleration equipment 20 of top layer comprises that first receiving element, first acquiring unit and first issue the unit, wherein:
First receiving element, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request;
First acquiring unit is used for the access order information according to configuration, to other Streaming Media acceleration equipment request stream medium datas of data source station and/or this layer;
Here, access order information can be priority access data source stations, for a certain reason (such as, the link of Streaming Media acceleration equipment and data source station breaks down) when making the access data sources station failure, again to other Streaming Media acceleration equipment request stream medium datas of this layer; Perhaps in order to reduce pressure to the data source station, but other Streaming Media acceleration equipments of this layer of priority access, when obtaining data failure, again to data source station request stream medium data; Certainly, also can be to obtain stream medium data from other Streaming Media acceleration equipments of data source station and this layer simultaneously;
First issues the unit, is used for the described stream medium data that gets access to is sent to underflow medium acceleration equipment.
As the embodiment of priority access data source station, described first acquiring unit comprises that data source unit and first is with layer unit, wherein:
The data source unit is used for sending Streaming Media to the data source station and obtains request;
First with layer unit, be used for obtaining when failing in described data source unit, according to the area information of configuration, determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Medias to other Streaming Media acceleration equipments of determining and obtain request.
Here, the zone is the set of some Streaming Media acceleration equipments, is used to describe the restrictive condition that carries out data sharing between the Streaming Media acceleration equipment.The Streaming Media acceleration equipment that belongs to same zone is formed a logical subnetwork, allows to carry out data sharing.The proposition of area concept is used for the data circulation between the control flows medium acceleration equipment, with needs or the network environment restriction of satisfying the CDN service management.
In addition, first can determine in this layer and send Streaming Media from which or a plurality of Streaming Media acceleration equipment in the same area and obtain request with layer unit according to the system architecture information of configuration, also can determine by the discovery algorithm.Specifically can adopt P2P mode other Streaming Media acceleration equipments from this layer to obtain data.
Concrete, the Streaming Media acceleration equipment 21 in described intermediate layer comprises that second receiving element, second acquisition unit and second issue the unit, wherein:
Second receiving element, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request;
Second acquisition unit, be used for according to the configuration access order information, from the upper strata and/or other Streaming Media acceleration equipments of this layer obtain stream medium data;
Here, access order information can be priority access upper stream medium acceleration equipments, when obtaining data failure, again to other Streaming Media acceleration equipment request stream medium datas of this layer; Also can be that other Streaming Media acceleration equipments of this layer of priority access are when obtaining data failure, again to upper stream medium acceleration equipment request stream medium data; Certainly, also can be to obtain stream medium data from other Streaming Media acceleration equipments of upper strata and this layer simultaneously;
Second issues the unit, is used for the described stream medium data that gets access to is sent to underflow medium acceleration equipment.
As the embodiment of priority access upper stream medium acceleration equipment, described second acquisition unit comprises first upper unit and second layer unit together:
First upper unit, be used for according to the area information of configuration determine the upper strata with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request;
Second with layer unit, be used for when described first upper unit obtains failure, according to the area information of configuration determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request.
Here, Qu Yu notion is ditto described.First upper unit/second can be determined to obtain request in upper strata/this layer with from which or a plurality of Streaming Media acceleration equipment transmission Streaming Media in the same area with layer unit according to the system architecture information of configuration, also can determine by finding algorithm.First upper unit specifically can adopt multiserver to download (MSD) technology and obtain data from upper stream medium acceleration equipment; Second with specifically adopting the P2P mode from obtaining data with laminar flow medium acceleration equipment in layer unit.
Concrete, the Streaming Media acceleration equipment 22 of described bottom comprises that the 3rd receiving element, the 3rd acquiring unit and the 3rd issue the unit, wherein:
The 3rd receiving element, the Streaming Media that is used to receive from the user obtains request;
The 3rd acquiring unit, be used for according to the configuration access order information, from the upper strata and/or other Streaming Media acceleration equipments of this layer obtain stream medium data;
Here, access order information can be priority access upper stream medium acceleration equipments, when obtaining data failure, again to other Streaming Media acceleration equipment request stream medium datas of this layer; Also can be that other Streaming Media acceleration equipments of this layer of priority access are when obtaining data failure, again to upper stream medium acceleration equipment request stream medium data; Certainly, also can be to obtain stream medium data from other Streaming Media acceleration equipments of upper strata and this layer simultaneously;
The 3rd issues the unit, is used for the described stream medium data that gets access to is sent to described user.
As the embodiment of priority access upper stream medium acceleration equipment, described the 3rd acquiring unit comprises that second upper unit and the 3rd is with layer unit, wherein:
Second upper unit, be used for according to the area information of configuration determine the upper strata with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request;
The 3rd with layer unit, be used for when described second upper unit obtains failure, according to the area information of configuration determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request.
Here, Qu Yu notion is ditto described.Second upper unit/3rd can determine to obtain request in upper strata/this layer with from which or a plurality of Streaming Media acceleration equipment transmission Streaming Media in the same area with layer unit according to the system architecture information of configuration, also can determine by finding algorithm.Second upper unit specifically can adopt multiserver to download (MSD) technology and obtain data from upper stream medium acceleration equipment; The 3rd with specifically adopting the P2P mode from obtaining data with laminar flow medium acceleration equipment in layer unit.
This system further comprises GSLB equipment 23 and central management equipment 24, wherein:
Concrete, the user at first visits GSLB equipment before need obtaining stream medium data, GSLB equipment is according to the loading condition of the Streaming Media acceleration equipment of user's position and/or bottom, Streaming Media acceleration equipment distance users is nearer and the bottom that load is less forms tabulation and feeds back to the user, and the user selects the Streaming Media acceleration equipment and asks stream medium data to it from tabulation;
The embodiment of the invention adds the structure of the accelerating system that provides mainly by concrete application decision.On the one hand, accelerating system is obtained data towards the data source station of content supplier from the source station, needs the pressure of control to the source station, promptly controls the quantity of top layer Streaming Media acceleration equipment; On the other hand, accelerating system provides service towards the end user, and enough service bandwidths need be provided, and promptly needs the bottom current medium acceleration equipment of sufficient amount.The structure in intermediate layer then needs to guarantee the data distribution capability that provides enough, and data are diffused into a large amount of bottom current medium acceleration equipments from the top layer Streaming Media acceleration equipment of limited amount.Can improve the data distribution capability in intermediate layer by the quantity of increase intermediate layer Streaming Media acceleration equipment and the mode of the intermediate layer number of plies, guarantee that the Streaming Media acceleration equipment of all bottoms can both stably obtain data.By the quantity of reasonable adjusting top layer, intermediate layer and underlying device, can satisfy the Streaming Media of random scale and use.
Referring to Fig. 3, the embodiment of the invention also provides a kind of flow-medium transmission method based on said system, specifically comprises the steps:
Step 30: the Streaming Media acceleration equipment receives Streaming Media and obtains request;
Step 31: described Streaming Media acceleration equipment determines from the residing level of described stream media acceleration system according to system architecture information, according to definite result by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments;
Here, system architecture information can be handed down to the Streaming Media acceleration equipment by central management equipment when making up stream media acceleration system, also can generate after each Streaming Media acceleration equipment dynamic negotiation.
Step 32: described Streaming Media acceleration equipment offers the stream medium data that gets access to the equipment of these data of request.
This method has following three kinds of situations:
First kind, when described Streaming Media acceleration equipment is in the top layer of stream media acceleration system, described Streaming Media obtains request from underflow medium acceleration equipment, described Streaming Media acceleration equipment is according to the access order information of configuration, to the data source station and/or with other Streaming Media acceleration equipment request stream medium datas of layer, and the stream medium data that gets access to sent to underflow medium acceleration equipment;
Second kind, when described Streaming Media acceleration equipment is in the intermediate layer of described system, described Streaming Media obtains request from underflow medium acceleration equipment, described Streaming Media acceleration equipment is according to the access order information of configuration, to upper stream medium acceleration equipment and/or with other Streaming Media acceleration equipment request stream medium datas of layer, and the stream medium data that gets access to sent to underflow medium acceleration equipment;
The third, when described Streaming Media acceleration equipment is in the bottom of described system, described Streaming Media obtains request from subscriber equipment, described Streaming Media acceleration equipment is according to the access order information of configuration, to upper stream medium acceleration equipment and/or with other Streaming Media acceleration equipment request stream medium datas of layer, and the stream medium data that gets access to sent to subscriber equipment.
The Streaming Media acceleration equipment can use MSD, and one or more Streaming Media acceleration equipments obtain stream medium data from the upper strata; Use the P2P mode to obtain stream medium data from one or more other Streaming Media acceleration equipment of this layer.
The Streaming Media acceleration equipment is from the upper strata or this laminar flow medium acceleration equipment when obtaining stream medium data, specifically can be according to the area information of configuration, in upper strata or this layer and from the one or more Streaming Media acceleration equipment request stream medium datas in the same area.The notion in zone is ditto described, the zone can be interpreted as logical subnetwork.
As shown in Figure 4, channel is the base unit that Streaming Media is used, and represents a stream medium data.A Streaming Media acceleration equipment can be served a plurality of channels simultaneously, as Streaming Media acceleration equipment B, Streaming Media acceleration equipment C and Streaming Media acceleration equipment E while service channel 1 and channel 2.Have only between the acceleration equipment of serving same channel and just can carry out the data interaction of this channel.Streaming Media acceleration equipment A, Streaming Media acceleration equipment B and Streaming Media acceleration equipment C form logical subnetwork 1, Streaming Media acceleration equipment C connects 401 and 402 with Streaming Media acceleration equipment A and Streaming Media acceleration equipment B respectively, and the mode of use MSD is obtained the stream medium data of channel 2; Connect 403 between Streaming Media acceleration equipment A and the Streaming Media acceleration equipment B, use the stream medium data of the shared channel 1 of mode of P2P.Streaming Media acceleration equipment B and Streaming Media acceleration equipment D form logical subnetwork 2, connect 405 between Streaming Media acceleration equipment D and the Streaming Media acceleration equipment B, obtain the stream medium data of channel 1.In like manner, Streaming Media acceleration equipment C and Streaming Media acceleration equipment B connect 404, obtain the stream medium data of channel 1.Streaming Media acceleration equipment E and miscellaneous equipment be not all in identical logical subnetwork, so other Streaming Media acceleration equipment can data interaction not take place with it, reaches the purpose of restriction.
Before user's transport stream media data, need to make up stream media acceleration system and guide user capture Streaming Media acceleration equipment, specific as follows, as shown in Figure 5:
Step 501: content supplier provides Streaming Media application message and content release mode, as application scale, source station information, source station service ability or the like;
Step 502: select the Streaming Media acceleration equipment and plan the hierarchy of Streaming Media acceleration equipment, and configuration information is issued to relevant Streaming Media acceleration equipment from central management server;
Step 503: content supplier's mode according to a preconcerted arrangement issues the stream medium data content, and provides access for user capture;
Step 504: the user according to the issue inlet to stream media acceleration system request stream medium data.
Here, the user at first arrives the GSLB device of accelerating system place CDN network, the GSLB device forms optimum bottom current medium and quickens the service equipment tabulation and feed back to the user, and the user therefrom selects the Streaming Media acceleration equipment and send Streaming Media to it to obtain request;
Step 505: stream media acceleration system obtains stream medium data;
Here, Streaming Media obtains request from the forwarding layer by layer by the intermediate layer of the bottom current medium acceleration equipment of accelerating system, finally arrives top layer Streaming Media acceleration equipment; Top layer Streaming Media acceleration equipment obtains stream medium data from the source station, and by the issuing layer by layer of intermediate layer equipment, finally reaches bottom current medium acceleration equipment; Bottom current medium acceleration equipment sends the data to the user again.
Step 506: the stream medium data that gets access to is offered the user.
As shown in Figure 6, obtain the idiographic flow of stream medium data for stream media acceleration system:
Step 601: the Streaming Media acceleration equipment receives that Streaming Media obtains request; If this equipment is positioned at the bottom of stream media acceleration system, then the Streaming Media request of obtaining comes from the user; If this equipment is positioned at intermediate layer or top layer, then the Streaming Media request of obtaining comes from underflow medium acceleration equipment;
Step 602: judging whether has the stream medium data that need obtain, if data with existing then offers these data the equipment of the request of transmission, otherwise changes step 603 over to;
Step 603: judge whether from data source station request msg; If can obtain data, then change step 604 over to, otherwise change step 605 over to from the data source station; In hierarchy, allow overlay device to obtain data usually from the data source station; If exist a plurality of data source station, Streaming Media acceleration equipment can select one or more data source station to attempt, and use optimum source station;
Step 604: obtain data from the data source station; The Streaming Media acceleration equipment uses the normal stream media protocol to obtain data by setting up TCP with the data source station or UDP is connected, and changes step 607 over to after obtaining stream medium data;
Step 605: attempt seeking upper stream medium acceleration equipment, and use the mode of MSD to obtain stream medium data; Hierarchical relationship between the Streaming Media acceleration equipment can be specified by configuration information, also can be produced by dynamic negotiation between the acceleration equipment; When finding some upper stream medium acceleration equipments, therefrom choose one or more upper stream medium acceleration equipment and attempt the request stream medium data; Can obtain the different piece of stream medium data from a plurality of upper stream medium acceleration equipments, multichannel data is parallel to be obtained, and allows certain redundancy between the data;
Step 606: attempt seeking, and use the mode of P2P to obtain stream medium data with laminar flow medium acceleration equipment; Regular and the neighbouring device exchange state information of Streaming Media acceleration equipment finds other Streaming Media acceleration equipment of serving this content in the CDN network, and shared data;
Step 607: after the Streaming Media acceleration equipment obtains stream medium data, data can be offered underflow medium acceleration equipment or user.
Referring to Fig. 7, the embodiment of the invention also provides a kind of Streaming Media acceleration equipment, and this equipment comprises processing unit 70, request unit 71 and retransmission unit 72, wherein:
Processing unit 70 is used for receiving stream media and obtains request;
As first embodiment, described request unit 71 comprises: first acquiring unit 80, when being used for determining self to be in the top layer of stream media acceleration system according to system architecture information, according to the access order information of configuration, to other Streaming Media acceleration equipment request stream medium datas of data source station and/or this layer;
Described retransmission unit 72 comprises: first issues unit 81, is used for the stream medium data that described first acquiring unit gets access to is sent to the Streaming Media acceleration equipment of these data of request.
Described first acquiring unit 80 comprises that data source unit 90 and first is with layer unit 91, wherein:
First with layer unit 91, be used for obtaining when failing in described data source unit, according to the area information of configuration, determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Medias to other Streaming Media acceleration equipments of determining and obtain request.
As second embodiment, described request unit 71 comprises: second acquisition unit 82, when being used for determining self to be in the intermediate layer of stream media acceleration system according to system architecture information, according to the access order information of configuration, to other Streaming Media acceleration equipment request stream medium datas of upper strata and/or this layer;
Described retransmission unit 72 comprises: second issues unit 83, is used for the stream medium data that described second acquisition unit gets access to is sent to the Streaming Media acceleration equipment of these data of request;
Described second acquisition unit 82 comprises first upper unit 92 and second layer unit 93 together:
First upper unit 92, be used for according to the area information of configuration determine the upper strata with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request;
Second with layer unit 93, be used for when described first upper unit obtains failure, according to the area information of configuration determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request.
As the 3rd embodiment, described processing unit 70 comprises: described request unit 71 comprises: the 3rd acquiring unit 84, when being used for determining self to be in the bottom of stream media acceleration system according to system architecture information, according to the access order information of configuration, to other Streaming Media acceleration equipment request stream medium datas of upper strata and/or this layer;
Described retransmission unit 72 comprises: the 3rd issues unit 85, is used for the stream medium data that described the 3rd acquiring unit gets access to is sent to the subscriber equipment of these data of request.
Described the 3rd acquiring unit 84 comprises that second upper unit 94 and the 3rd is with layer unit 95, wherein:
Second upper unit 94, be used for according to the area information of configuration determine the upper strata with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request;
The 3rd with layer unit 95, be used for when described second upper unit obtains failure, according to the area information of configuration determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request.
To sum up, beneficial effect of the present invention is:
The stream media acceleration system that the embodiment of the invention provides adopts the layering deployment scheme, the Streaming Media acceleration equipment of top layer can be from the data source station or is obtained stream medium data with other Streaming Media acceleration equipments of layer, and the Streaming Media acceleration equipment of intermediate layer and bottom obtains stream medium data from the upper strata or with other Streaming Media acceleration equipments of layer.As seen, in the stream media acceleration system of described layer architecture, upper stream medium acceleration equipment can be underflow medium acceleration equipment stream medium data is provided, with also carrying out data interaction between the laminar flow medium acceleration equipment, reduced pressure to the data source station, can guarantee that stream media acceleration system provides stable stream medium data for the user, gets reliability thereby improved accelerating system greatly.
With respect to traditional Streaming Media speeding scheme, the stream media acceleration system that the present invention makes up forms flexible, extendible architecture by the combination between the acceleration equipment, can support the Streaming Media of random scale to quicken to use.By using MSD and P2P technology, accelerating system can guarantee that all acceleration equipments can both obtain stable stream medium data, reduces link and the equipment fault influence to service quality.A logical subnetwork is formed with some acceleration equipments in the zone, can control the data flow between the acceleration equipment effectively, satisfies the demand of service management.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1, a kind of stream media acceleration system of content-based distributing network is characterized in that, this system comprises:
The Streaming Media acceleration equipment of top layer, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request, from the data source station or other Streaming Media acceleration equipment of this layer obtain stream medium data, the stream medium data that gets access to is sent to described underflow medium acceleration equipment;
The Streaming Media acceleration equipment of bottom, the Streaming Media that is used to receive from the user obtains request, obtains stream medium data from upper stream medium acceleration equipment or other Streaming Media acceleration equipment of this layer, and the stream medium data that gets access to is sent to described user.
2, the system as claimed in claim 1 is characterized in that, this system further comprises:
The Streaming Media acceleration equipment in intermediate layer, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request, obtain stream medium data from upper stream medium acceleration equipment or other Streaming Media acceleration equipment of this layer, the stream medium data that gets access to is sent to described underflow medium acceleration equipment.
3, system as claimed in claim 2 is characterized in that, the Streaming Media acceleration equipment of described top layer comprises:
First receiving element, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request;
First acquiring unit is used for the access order information according to configuration, to other Streaming Media acceleration equipment request stream medium datas of data source station and/or this layer;
First issues the unit, is used for the described stream medium data that gets access to is sent to underflow medium acceleration equipment;
The Streaming Media acceleration equipment in described intermediate layer comprises:
Second receiving element, the Streaming Media that is used to receive from underflow medium acceleration equipment obtains request;
Second acquisition unit, be used for according to the configuration access order information, from the upper strata and/or other Streaming Media acceleration equipments of this layer obtain stream medium data;
Second issues the unit, is used for the described stream medium data that gets access to is sent to underflow medium acceleration equipment;
The Streaming Media acceleration equipment of described bottom comprises:
The 3rd receiving element, the Streaming Media that is used to receive from the user obtains request;
The 3rd acquiring unit, be used for according to the configuration access order information, from the upper strata and/or other Streaming Media acceleration equipments of this layer obtain stream medium data;
The 3rd issues the unit, is used for the described stream medium data that gets access to is sent to described user.
4, system as claimed in claim 3 is characterized in that, described first acquiring unit comprises:
The data source unit is used for sending Streaming Media to the data source station and obtains request;
First with layer unit, be used for obtaining when failing in described data source unit, according to the area information of configuration, determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Medias to other Streaming Media acceleration equipments of determining and obtain request;
Described second acquisition unit comprises:
First upper unit, be used for according to the area information of configuration determine the upper strata with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request;
Second with layer unit, be used for when described first upper unit obtains failure, according to the area information of configuration determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request;
Described the 3rd acquiring unit comprises:
Second upper unit, be used for according to the area information of configuration determine the upper strata with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request;
The 3rd with layer unit, be used for when described second upper unit obtains failure, according to the area information of configuration determine in this layer with from one or more other Streaming Media acceleration equipments in the same area, and send Streaming Media to the Streaming Media acceleration equipment of determining and obtain request.
5, the system as claimed in claim 1 is characterized in that, this system further comprises:
GSLB equipment is used for the loading condition according to the Streaming Media acceleration equipment of user's position and/or bottom, and the Streaming Media acceleration equipment of user guiding optimum is obtained stream medium data;
Central management equipment is used for described Streaming Media acceleration equipment is managed.
6, a kind of flow-medium transmission method based on the described stream media acceleration system of claim 1 is characterized in that, this method comprises:
The Streaming Media acceleration equipment receives Streaming Media and obtains request;
Determine from the residing level of described stream media acceleration system according to system architecture information, according to definite result by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments;
The stream medium data that gets access to is offered the equipment of these data of request.
7, method as claimed in claim 6, it is characterized in that, when described Streaming Media acceleration equipment is determined self to be in the top layer of described system, described Streaming Media obtains request from underflow medium acceleration equipment, described by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments, the equipment that the stream medium data that gets access to is offered these data of request comprises:
Described Streaming Media acceleration equipment is according to the access order information of configuration, to the data source station and/or with other Streaming Media acceleration equipment request stream medium datas of layer, and the stream medium data that gets access to sent to underflow medium acceleration equipment;
When described Streaming Media acceleration equipment is determined self to be in the intermediate layer of described system, described Streaming Media obtains request from underflow medium acceleration equipment, described by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments, the equipment that the stream medium data that gets access to is offered these data of request comprises:
Described Streaming Media acceleration equipment is according to the access order information of configuration, to upper stream medium acceleration equipment and/or with other Streaming Media acceleration equipment request stream medium datas of layer, and the stream medium data that gets access to sent to underflow medium acceleration equipment;
When described Streaming Media acceleration equipment is determined self to be in the bottom of described system, described Streaming Media obtains request from subscriber equipment, described by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments, the equipment that the stream medium data that gets access to is offered these data of request comprises:
Described Streaming Media acceleration equipment is according to the access order information of configuration, to upper stream medium acceleration equipment and/or with other Streaming Media acceleration equipment request stream medium datas of layer, and the stream medium data that gets access to sent to subscriber equipment.
8, method as claimed in claim 7 is characterized in that, described Streaming Media acceleration equipment uses multiserver download technology MSD to obtain stream medium data from upper stream medium acceleration equipment; Use reciprocity P2P mode to obtain stream medium data from other Streaming Media acceleration equipment of this layer.
9, method as claimed in claim 7 is characterized in that, described Streaming Media acceleration equipment is according to the area information of configuration, in upper strata or this layer and from one or more other Streaming Media acceleration equipment request stream medium datas in the same area.
10, a kind of Streaming Media acceleration equipment is characterized in that, this equipment comprises:
Processing unit is used for receiving stream media and obtains request;
Request unit is used for determining from the residing level of stream media acceleration system according to system architecture information, according to definite result by obtaining stream medium data alternately with data source station or other Streaming Media acceleration equipments;
Retransmission unit is used for the described stream medium data that gets access to is offered the equipment of asking these data.
11, equipment as claimed in claim 10 is characterized in that, the described request unit comprises:
First acquiring unit is when being used for determining self to be in the top layer of stream media acceleration system according to system architecture information, according to the access order information of configuration, to other Streaming Media acceleration equipment request stream medium datas of data source station and/or this layer;
Second acquisition unit is when being used for determining self to be in the intermediate layer of stream media acceleration system according to system architecture information, according to the access order information of configuration, to other Streaming Media acceleration equipment request stream medium datas of upper strata and/or this layer;
The 3rd acquiring unit is when being used for determining self to be in the bottom of stream media acceleration system according to system architecture information, according to the access order information of configuration, to other Streaming Media acceleration equipment request stream medium datas of upper strata and/or this layer;
Described retransmission unit comprises:
First issues the unit, is used for the stream medium data that described first acquiring unit gets access to is sent to the Streaming Media acceleration equipment of these data of request;
Second issues the unit, is used for the stream medium data that described second acquisition unit gets access to is sent to the Streaming Media acceleration equipment of these data of request;
The 3rd issues the unit, is used for the stream medium data that described the 3rd acquiring unit gets access to is sent to the subscriber equipment of these data of request.
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| CN2008101011205A CN101237418B (en) | 2008-02-28 | 2008-02-28 | Stream media acceleration system, method and device based on content distribution network |
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