CN102291629B - A kind of P2P applied to IPTV acts on behalf of VOD system and implementation method - Google Patents
A kind of P2P applied to IPTV acts on behalf of VOD system and implementation method Download PDFInfo
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Abstract
The present invention provides a kind of P2P applied to IPTV to act on behalf of VOD system and implementation method, and the method includes management server, streaming media server and set-top boxes；Management server includes streaming media server management module, for carrying out fragment to all media files and being distributed in each media server；Burst information is managed, in the piece source node identification request for receiving P2P proxy module to its piece source node identification needed for returning；Media server includes storage unit and P2P proxy module；The storage unit, for storing fragment data；P2P proxy module for being stored with the currently piece source node identification by the fragment data of the media file of program request from management server acquisition, and carries out content scheduling from each source node by P2P agent way to obtain relevant fragment data.Disk space is rationally utilized in the present invention, avoids waste；Reduce operating frequency when rush hour a large number of users is watched to magnetic disc i/o.
Description
Technical field
The present invention relates to the streaming media service of IPTV and P2P technical field more particularly to a kind of P2P generations applied to IPTV
Manage VOD system and implementation method.
Background technique
IPTV, that is, Interactive Internet TV is a kind of using broadband cable net, collects internet, multimedia, communication etc.
Multiple technologies provide the brand-new technology of a variety of interactive services including DTV in one, to domestic consumer.?
In IPTV system, user passes through set-top box first and the operation, after the completion of relevant operation, Yong Huxuan such as logs in, authenticates, ordering
In some program watched, at this time set-top box can arrive streaming media server drop-down data and be decoded broadcasting, thus
In IPTV system, streaming media server is that the core of media data service is provided in system.Streaming media server to user into
It can be related to magnetic disc i/o operation when row service, when IPTV system user volume is very big, magnetic disc i/o operation will very frequently.Mesh
Before there are the problem of mainly have the following aspects:
1. when one program of user's program request, some streaming media servers have the ability (including CPU, memory and bandwidth), but
It is that therefore can not externally provide service without corresponding media data on its disk；
2. thering is the streaming media server of film source to be in overload state, frequently when a large amount of one program of user's program request
Magnetic disc i/o to operate damage to disk bigger, thus the disk for the streaming media server now netted often will appear damage therefore
Barrier.
Summary of the invention
The purpose of the present invention is to provide a kind of P2P applied to IPTV to act on behalf of VOD system and implementation method, reduces
Each streaming media server while realizing that the whole network Streaming Media takes to the operating frequency of its magnetic disc i/o in system when a large number of users program request
The load balancing of business device.
To achieve the above object, the embodiment of the present invention uses following technical scheme.
A kind of P2P applied to IPTV acts on behalf of VOD system, including management server, streaming media server and set-top box,
Management server includes streaming media server management module, for carrying out fragment to all media files and being distributed in
Each media server；It is also used to manage burst information, be returned in the piece source node identification request for receiving P2P proxy module to it
Return required piece source node identification；
The media server includes storage unit and P2P proxy module；The storage unit, for storing fragment number
According to；The P2P proxy module, for being stored with currently from management server acquisition by the fragment data of the media file of program request
Piece source node identification, and content scheduling is carried out from each source node to obtain relevant fragment data by P2P agent way.
Preferably, the storage unit includes:
Distributed fragment memory block is set to disk, local fragment data is distributed to for storing, for local reading
It takes；
Dynamic Program Slicing memory block is set to memory, is more than the fragment data of the media file of threshold value for cache on demand temperature,
For reading when local reading and/or external progress content scheduling.
Preferably, the storage unit further includes the first fragment memory block, disk/memory is set to, for storing all matchmakers
First fragment data of body file.
Preferably, the management server is also used to the program request temperature of each media file of periodic statistical, for point therein
The media file that temperature is more than threshold value is broadcast, triggers corresponding piece source node for relevant fragment data from distributed fragment memory block
It is cached into Dynamic Program Slicing memory block.
Preferably, the size of the Dynamic Program Slicing memory block is 2G.
A kind of P2P applied to IPTV acts on behalf of program request implementation method, comprising:
Management server carries out fragment to all media files and is distributed in each streaming media server；
For each streaming media server, in the file data drop-down request for receiving local set-top box, from local reading
It takes relevant fragment data and/or is stored with the streaming media server of related fragment data from other in such a way that P2P is acted on behalf of
Content scheduling is carried out to obtain relevant fragment data, fragment data obtained is then supplied to the set-top box.
Preferably, the process that all fragments are distributed in each streaming media server further comprises:
In the first fragment memory block of each streaming media server, the first fragment data of all media files is stored；
In the distributed fragment memory block of each streaming media server, storage is distributed to local fragment data.
Preferably, the above method further include: the program request temperature of each media file of management server periodic statistical, for wherein
Program request temperature be more than threshold value media file, trigger corresponding piece source node and deposit relevant fragment data from distributed fragment
Storage area is cached into Dynamic Program Slicing memory block.
Preferably, the streaming media server is further wrapped from the process that other streaming media servers carry out content scheduling
It includes:
Local P2P proxy module sends piece source node identification to management server and requests to be stored with related fragment to obtain
The piece source node identification of data；
After receiving piece source node identification, local P2P proxy module is sequentially shaken hands from each source node；With
Current piece source node initiates fragment data request of P2P to it after shaking hands successfully, the P2P proxy module of opposite end is from Dynamic Program Slicing
It is sent to local P2P proxy module after reading relevant fragment data in memory block, local P2P proxy module is receiving
Distributed fragment memory block is written while the fragment data is saved to local Dynamic Program Slicing memory block later.
Preferably, in the above method, the P2P proxy module is scheduled every time during carrying out content scheduling
Content be entire fragment data or part fragment data.
Compared with prior art, this embodiment of the present invention has the advantages that
The embodiment of the present invention realizes distributed flow media service, i.e., is distributed in multimedia file on different nodes,
Multiple node cooperative works provide service for user, the multimedia file piecemeal on different nodes, according between node file lack
The loading condition for losing situation and node is dispatched accordingly.The embodiment of the present invention is in such a way that P2P is acted on behalf of by institute in system
The disk and memory of some streaming media servers form an entirety and are managed, so as to avoid the waste of disk space；
The memory of streaming media servers all in system is formd an entirety to be managed, so that the memory of server can
More backings are cached, the frequent operation of the caused magnetic disc i/o when rush hour a large number of users watches backing is avoided.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is that the P2P in the embodiment of the present invention applied to IPTV acts on behalf of program request system structure diagram；
Fig. 2 is the business processing flow figure of management server in the embodiment of the present invention；
Fig. 3 is that P2P acts on behalf of program request implementation method flow chart in the embodiment of the present invention；
Fig. 4 is the method flow diagram that P2P proxy module carries out content scheduling in the embodiment of the present invention.
Specific embodiment
In order to be clearer and more clear technical problems, technical solutions and advantages to be solved, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
For the configuration 4G memory of current streaming media server, wherein the memory of 2G is used to cache backing content, 1G's
Memory is for running service routine.For the memory of 2G, the content that can cache several pieces is limited, if but system
In have 1 00 servers, then share 200G memory, this block memory be it is bigger, a large amount of backing can be cached.This hair
It is bright to be directed to this feature, put forward P2P agent skill group, so-called P2P agency is exactly that streaming media server is obtaining media data
When, the mode that P2P agency obtains data is no longer simply to read from disk, and data source is in three aspects: from disk
Directly read, from memory read, Real-Time Scheduling, P2P proxy module meeting are carried out from the memory or disk of other servers
According to local media file, there are situations to determine that three kinds of data acquisition strategies, P2P proxy module are packaged into corresponding library, Streaming Media
The corresponding bank interface function of server calls can realize the acquisition of file data.It is acted on behalf of, is may be implemented system by P2P
In all streaming media servers disk and memory be managed collectively, in system the memory bank of each node be an entirety,
The services for all users being responsible for is completed, realizes that all the elements between intra-node blade are shared.
As shown in Figure 1, it includes consisting of part that P2P, which acts on behalf of VOD system, in the present embodiment: one takes comprising Streaming Media
Management server, multiple streaming media servers and the multiple set-top boxes for device management module of being engaged in.
Set-top box shows EPG content after authenticating successfully for the operation such as being logged in, authenticated to business strip, with
Family selects program to trigger its stream broadcasting module when playing out from EPG and pulls down corresponding media from local streaming media server
Data.
Streaming media server, for receive local set-top box drop-down request when, according to the missing feelings of hot spot file
Condition directly reads corresponding media data from local storage unit and/or carries out content scheduling from other streaming media servers
Relevant media data is obtained, provides service for set-top box.The streaming media server includes storage unit and P2P proxy module；
Wherein,
Storage unit is divided for storing fragment data are as follows: 1. the first fragment memory block is set to disk/memory, is used for
The first fragment data of all media files is stored, so that user can obtain quickly response speed in initially viewing program
Degree；2. distributed fragment memory block, is set to disk, local fragment data is distributed to for storing, for local reading；③
Dynamic Program Slicing memory block is set to memory, for caching part fragment data, reads and/or externally carry out content tune for local
Reading when spending；
P2P proxy module, for being stored with currently from management server acquisition by the fragment data of the media file of program request
Piece source node identification, and the portion based on entire fragment data or fragment is carried out from each source node by P2P agent way
The content scheduling of divided data is to obtain relevant media data.
Streaming media server management module, for carrying out fragment to all media files and being distributed in each streaming media service
Device；Burst information is managed, provides piece source node identification service for each P2P proxy module；Each media file of periodic statistical
Program request temperature trigger corresponding piece source node for backing therein and store relevant fragment data from distributed fragment
Area is cached into Dynamic Program Slicing memory block.
As shown in Fig. 2, in the present embodiment, P2P acts on behalf of the business processing flow of management server in VOD system, including with
Lower step:
201, fragment is carried out to all media files, and all fragments is distributed to each media server.
202, for each media server, the first fragment number of all media files is stored in its first fragment memory block
According in its distributed fragment memory block storage and distribution to local fragment data.
203, the program request temperature of each media file of periodic statistical searches its piece source node for backing therein, and triggering should
Piece source node caches the relevant fragment data stored in its distributed fragment memory block to Dynamic Program Slicing memory block.
Pass through above-mentioned processing, since the first fragment of all media files all stores on each streaming media server, institute
Quick response speed can be obtained in initially viewing program with user；In addition, since backing is buffered to memory, it is local to use
Family streaming media server in program request can directly be read from memory, to reduce to magnetic disc i/o number of operations.
As shown in figure 3, in the present embodiment, P2P act on behalf of on-demand process the following steps are included:
301, user opens set-top box, and set-top box, which is logged in business platform, authenticated etc., to be operated, and business platform is passing through
After authentication, the content of EPG is shown on the set-top box.
302, user selects some program to play out from EPG, triggers the stream broadcasting module of set-top box, the stream of set-top box
Playing module sends media file data drop-down request to streaming media server.
303, streaming media server is after the media file data drop-down request for receiving set-top box, if this streaming media service
Device is film source, then relevant file data is directly read from memory or disk, obtains set-top box for use by P2P proxy module
The data needed.If this streaming media server is not film source, 304 are thened follow the steps, content tune is carried out using P2P agent way
Degree.
304, local P2P proxy module can arrive to be stored with above the server of film source automatically is scheduled, and scheduling is returned
Data write on disk while being stored in memory.It had not only realized in this way and quickly provides service to user, but also realized
Scheduling of the backing between streaming media server.
305, set-top box after receiving the data, is decoded broadcasting.
As shown in figure 4, P2P proxy module carries out the process of content scheduling in above-mentioned steps 304 specifically:
401, the P2P proxy module of requesting party has relevant fragment number to which node of management server application first
According to；
402, after management server returns to corresponding node, the P2P proxy module and these nodes of requesting party is held
Hand initiates the fragment data request of P2P after shaking hands successfully；
403, the P2P proxy module of opposite end, will be required from the memory of itself after receiving fragment data request message
Reading data come out and be sent to the P2P proxy module of requesting party；
404, the P2P proxy module of requesting party disappears reply after the fragment data for receiving each node replies message
Breath is assembled into original fragment data, then the fragment data is saved in memory, streaming media server module is from memory
Data service is provided after corresponding reading data is come out for set-top box.
For program request, although difficulty it is bigger be exactly that user sees is the same program, each user's
Progress is different, therefore when the viewing progress diversity ratio for all users being connected on a media server is larger, if adopted
With as described above based on the content scheduling of fragment, then the streaming media server needs all to exist whole film source in the extreme circumstances
External service can be met by being cached in Dynamic Program Slicing memory block.Therefore in the case, P2P proxy module can refine tune
The granularity of degree, i.e., carry out some backing memory cache when, only cache the fragment partial data (this part caching
Data can satisfy the demand of broadcasting), the other parts data of the fragment are subsequent again in real time from other streaming media servers
Scheduling comes.Assuming that the size of fragment is 24M, the partial data size that each fragment only needs to cache is 2M, for one 32
The film of × 24=768M then only needs 32 × 2=64M memory can be with the user service for the whole network, and a Streaming Media takes
Memory (the i.e. Dynamic Program Slicing memory block) size that business device can be used for caching backing is 2G, then can cache 32 backings, pass through P2P
The memory of all streaming media servers can be managed collectively by the mode of agency, if there are 100 streaming media servers, then it can be with
3200 backings are cached, for 3200 backings, it is only necessary to which a disk read-write, which can be realized, takes the whole network user
Business greatly reduces magnetic disc i/o operation.
When user volume is bigger, management server will do it load balancing, and the load balancing of routine in the prior art
Mode is evenly distributed to user above the streaming media server on disk with the film source, if these streaming media servers
Load it is bigger if, will affect the service of user, and at this moment in system may disk do not have film source some stream matchmakers
Body server is but in idle condition.In order to solve this problem, in the present embodiment management server when carrying out load balancing,
Load of the server of the Streaming Media in terms of CPU, memory, disk I/O considers whether to dispatch by all means, but regardless of the server
Whether relevant film source is had, and piece source data is obtained by P2P agent way, can be achieved with the negative of the whole network streaming media server in this way
It carries balanced.
The above description shows and describes a preferred embodiment of the present invention, but as previously described, it should be understood that the present invention
Be not limited to forms disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations,
Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through within that scope of the inventive concept describe herein
It is modified.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be in this hair
In the protection scope of bright appended claims.
Claims (10)
1. a kind of P2P applied to IPTV acts on behalf of VOD system, including management server, streaming media server and set-top box,
It is characterized in that,
Management server includes streaming media server management module, for carrying out fragment to all media files and being distributed in each matchmaker
Body server；It is also used to manage burst information, returns to institute to it in the piece source node identification request for receiving P2P proxy module
The piece source node identification needed；
The media server includes storage unit and P2P proxy module；The storage unit, for storing fragment data；Institute
P2P proxy module is stated, for being stored with currently from management server acquisition by the film source of the fragment data of the media file of program request
Nodal information, and content scheduling is carried out from each source node to obtain relevant fragment data by P2P agent way.
2. P2P as described in claim 1 acts on behalf of VOD system, which is characterized in that the storage unit includes:
Distributed fragment memory block is set to disk, local fragment data is distributed to for storing, for local reading；
Dynamic Program Slicing memory block is set to memory, is more than the fragment data of the media file of threshold value for cache on demand temperature, for
It is local to read and/or externally carry out reading when content scheduling.
3. P2P as claimed in claim 2 acts on behalf of VOD system, which is characterized in that the storage unit further includes the first fragment
Memory block is set to disk/memory, for storing the first fragment data of all media files.
4. the P2P as described in claims 1 to 3 is any acts on behalf of VOD system, which is characterized in that the management server is also used to
The program request temperature of each media file of periodic statistical, is more than the media file of threshold value for program request temperature therein, and triggering is corresponding
Piece source node caches relevant fragment data from distributed fragment memory block into Dynamic Program Slicing memory block.
5. P2P as claimed in claim 2 acts on behalf of VOD system, which is characterized in that the size of the Dynamic Program Slicing memory block is
2G。
6. a kind of P2P applied to IPTV acts on behalf of program request implementation method, which is characterized in that this method comprises:
Management server carries out fragment to all media files and is distributed in each streaming media server；
Each streaming media server is taken in the file data drop-down request for receiving local set-top box to the management
Business device sends the request of piece source node identification, and obtains piece source node identification from the management server；
Content scheduling is carried out to obtain relevant fragment data from each source node by P2P agent way, then will be obtained
Fragment data be supplied to the set-top box.
7. P2P as claimed in claim 6 acts on behalf of program request implementation method, which is characterized in that described to be distributed in all fragments respectively
The process of streaming media server further comprises:
In the first fragment memory block of each streaming media server, the first fragment data of all media files is stored；Every
The distributed fragment memory block of a streaming media server, storage are distributed to local fragment data.
8. P2P as claimed in claim 7 acts on behalf of program request implementation method, which is characterized in that this method further include: management server
The program request temperature of each media file of periodic statistical, is more than the media file of threshold value for program request temperature therein, and triggering is corresponding
Piece source node caches relevant fragment data from distributed fragment memory block into Dynamic Program Slicing memory block.
9. P2P as claimed in claim 8 acts on behalf of program request implementation method, which is characterized in that it is described by P2P agent way from each
Piece source node carries out content scheduling to obtain relevant fragment data:
Local P2P proxy module sends piece source node identification to management server and requests to be stored with related fragment data to obtain
Piece source node identification；
After receiving piece source node identification, local P2P proxy module is sequentially shaken hands from each source node；With it is current
Piece source node shake hands successfully after fragment data request of P2P is initiated to it, the P2P proxy module of opposite end is stored from Dynamic Program Slicing
It is sent to local P2P proxy module after reading relevant fragment data in area, local P2P proxy module is upon receipt
Distributed fragment memory block is written while the fragment data is saved to local Dynamic Program Slicing memory block.
10. P2P as claimed in claim 9 acts on behalf of program request implementation method, which is characterized in that in this method, the P2P acts on behalf of mould
For block during carrying out content scheduling, the content being scheduled every time is entire fragment data or part fragment data.
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| CN103024593A (en) * | 2012-12-26 | 2013-04-03 | 人民搜索网络股份公司 | Online VOD (video on demand) acceleration system and online VOD playing method |
| CN103475947B (en) * | 2013-09-13 | 2016-08-31 | 中国联合网络通信集团有限公司 | A kind of flow media distribution system based on software defined network and method |
| CN104104973B (en) * | 2014-06-12 | 2017-07-07 | 中山大学 | A kind of group's Bandwidth Management optimization method for being applied to cloud media system |
| CN105376218B (en) * | 2015-10-21 | 2020-11-13 | 上海思华科技股份有限公司 | Streaming media system and method for quickly responding to user request |
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