CN104394483B - A kind of flow localized optimized treatment method in Internet video-on-demand system - Google Patents
A kind of flow localized optimized treatment method in Internet video-on-demand system Download PDFInfo
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- CN104394483B CN104394483B CN201410650766.4A CN201410650766A CN104394483B CN 104394483 B CN104394483 B CN 104394483B CN 201410650766 A CN201410650766 A CN 201410650766A CN 104394483 B CN104394483 B CN 104394483B
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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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/632—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/64322—IP
-
- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
-
- 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
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Computer And Data Communications (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
A kind of flow localized optimized treatment method in Internet video-on-demand system, including：Node periodically reports network condition, IP address and playing progress rate, the bitmap of itself to Tracker servers.Tracker servers are according to the request of the node, the node formation list of selection areal is sent to the node, the node is by parsing the bitmaps of peerList interior joints, 6 nodes of the selection with requested data block, connection request is sent to this 6 nodes simultaneously, until first node response, then the node with response carries out data transmission.If local node is not sufficient to ensure that Streaming Media smooth playing, node carries out P2P to Tracker servers request non-local nodes and shared.While ensureing flow localized as far as possible, supported by reasonably adding non-localized node, time delay when user in FLASH P2P video on-demand systems receives request program is reduced, video playback fluency is improved, and largely reduces the flow pressure of operator's core network.
Description
Technical field
The present invention is to provide the flow localized optimized treatment method in a kind of FLASH P2P VOD systems, is mainly used in
The problem of P2P flows in the video web page program request based on FLASH platforms are excessive to take core network bandwidth is solved, is ensureing user
Farthest reduction P2P flows, to the occupancy of core network flow, belong to computer network field while experience.
Background technology
FLASH P2P are the P2P technologies realized in FLASH platforms developed by Adobe companies, and the technology is based on RTMFP
(real-time stream media protocol).Adobe companies introduce RTMFP agreements in Flash Player10 and follow-up version.RTMFP
Agreement provides high quality communication solution for live and real-time Communication for Power program.
RTMFP transmits data to improve data transmission bauds using UDP, and sets up mode using similar TCP connection, protects
Demonstrate,prove the reliability of connection.In FLASH P2P technologies, two nodes can be directly communicated with each other after server authentication, reduction
The bandwidth demand of server end.So this scheme is well suited for large-scale deployment, such as privately owned video request program of enterprise (VOD)
System, audio frequency and video chat and multiplayer etc..RTMFP is because employ UDP, while transmission speed is lifted, it is also desirable to logical
Cross the reliability that two functions improve connection.(1) quick connection recovers：It is connected to that occur under fortuitous event can quick-recovery soon.
(2) IP mobilism：The BlueDrama of activity is identified with node identification (PeerID), even if certain node replacement IP, can also be protected
Hold former session.
The Large video website such as domestic Sohu, iqiyi.com, youku.com all employs FLASH P2P technologies, to reduce costliness
Bandwidth is paid wages, however, three big websites are not all localized processing to FLASH P2P, causes huge P2P flows to operation
Business's core network causes larger pressure.
The content of the invention
Technical problem：It is an object of the invention to provide the flow sheet in a kind of FLASH P2P Internet video-on-demand systems
Ground optimized treatment method, by optimizing flash p2p node selection algorithm, makes the video web page point based on FLASH platforms
P2P flows in broadcasting largely are reduced to the occupancy of backbone network flow, so as to reduce operator's cost, are ground with higher
Study carefully meaning.
Technical scheme：FLASH P2P provide many advantages compared to tradition P2P, for example, being regarded based on the Flash P2P realized
Frequency broadcast system can be with cross-platform operation, it is not necessary to for the different P2P video-on-demand applications of different platform developments, main at present
Stream browser all supports Flash Player, and it is widely applied and huge customer group, causes the sharp increase of P2P flows, right
The core network of operator causes greater impact.For this it is proposed that a kind of use flow localized FLASH P2P VOD bodies
Architecture, to reduce time delay when user in FLASH P2P VOD systems receives request program, and mitigates operator's backbone network
The flow pressure of network.Using this flow localized processing method FLASH P2P VOD system framework, as shown in figure 1, its work
Principle is as follows：
User is when carrying out video request program, and node is set up with RTMFP servers be connected the unique ID of acquisition first, and node is obtained
After ID, set up and be connected with Tracker servers, carry out the note of the information such as IP, network delay, PeerID, VideoID, BitMap
Volume is to set up P2P shared groups.The establishment of Tracker server P2P shared groups, maintain, exit.When node asks P2P data,
Node is first to Tracker server acquisition request node listings, and Tracker servers are selected according to the log-on message of each node
Local node generation node listing is sent to the node, and node often asks one piece of data all can be according to node listing interior joint
BitMap is parsed, and selects 6 nodes with required data block, and the node sends Hello to this 6 nodes and reported simultaneously
Text sets up connection, once there is node to respond hello packet, then abandons being connected with the foundation of other nodes.If 6 nodes all ring
Should be overtime, then the node is applied to Tracker servers again, and Tracker servers can select 6 non-local nodes
Form node listing and be sent to the node, so both ensure that the localization of P2P flows in turn ensure that the smoothness of video playback
Property.
Flow localized optimized treatment method in a kind of Internet video-on-demand system of the present invention is applied in FLASH
In P2P Internet video-on-demand systems, specific flow localized optimized treatment method is：
1) when one video of a node program request, the node can ask first video segment, institute to Redirect Server
The first video segment for stating node request is obtained from video content server, to ensure video smooth playing and follow-up good
P2P shares；
2) Redirect Server redirects requests to video storage server, and video storage server is used as super node
In the presence of with real-time stream media protocol RTMFP (Real Time Media Flow Protocol) and node-node transmission video data；
3) node obtains video segment from video storage server and played, and node parsing video data, acquisition is regarded
Frequency information；
4) node obtains unique 256 character string PEERID, first with RTMFP server application PEERID, its
In, support the server of RTMFP agreements to include increase income RTMFP servers CUMULUS or the service of other support RTMFP agreements
Device；CUMULUS gives the exchange of PEERID between the unique PEERID of node one, the not responsible node of RTMFP servers,
PEERID exchange is realized by TRACKER servers；
5) node is periodically to TRACKER server registrations nodal information to set up P2P groups, and the node will be current
Network delay delay, current play time currentTime, video time stamp timeStamp, IP, node downloading data
Bitmap BitMap, address information are sent to TRACKER servers；Wherein, node in itself click on video connection when, to itself net
Network is inquired about and information is stored in cookie, and this information is sent jointly into Tracker servers with own IP address,
Tracker servers can be accelerated and be localized packet, without may require that server spends resource to analyze IP address
Positioning；Whether Tracker servers, in same local network and node current network conditions, filter out according to node IP address
The M node formation node listing peerList of the video data for possessing the node request in same local network；Its
Middle M is constant；
6) node is to other local node requested data blocks X, and the node is obtained and parsed after peerList
The BitMap of peerList interior joints, selects six nodes containing the data block, and the node is sent out to 6 local nodes simultaneously
Hello packet is sent, to set up P2P connections；If a local node responds the node, REhello messages are returned to, then institute
State node to be only connected with responsive node foundation, and no longer set up and be connected with other nodes, connection carries out P2P data biographies after setting up
It is defeated；
If 7) in request data process interior joint response timeout, the node sends connection request to other nodes,
Continue request data, the same step 6) of detailed process；
8) if local node is not enough to provide data, the node sends to Tracker servers and redirects request,
Node request is redirected to the good non-local nodes of network condition by Tracker servers, is obtained in localization as far as possible
Access adds from non-local nodes on the premise of and obtains flow, only think that the node is carried in local nodes deficiency
During for smooth broadcasting, the node sends to Tracker servers and asked again, and Tracker servers will ask to redirect
To the good non-local nodes of network condition, it is ensured that video request-program process is more smooth.
The TRACKER servers are WEB server or other listservs, are handed over for the PEERID between node
Change, and user name and PEERID mapping, the establishments of P2P shared groups, maintenance, terminate.
It is described to send the number that hello packet is the request connection that initiator sends in handshake phase when two nodes set up connection
According to bag.
The return REhello messages are the response hello that reciever is sent in handshake phase when two nodes set up connection
The response data packet of message.
The computational methods of the M are as follows：
M=(bufferSize/pieceSize) * 6
BufferSize is video buffer size, and pieceSize is video slice size, and each video segment provides 6
Individual peer；The acquisition of any data of node must be complete, except ending, and original position offset%
PieceSize==0.
The cookie is website to distinguish user identity, carry out session tracking and be stored in user local terminal
On data, generally go through encryption.
Beneficial effect：
1. being not required to develop special P2P video-on-demand applications, the browser for supporting Flash is that the P2P that video flowing can be achieved is total to
Enjoy.
2. the localization of flow supports that the network delay of video stream data can be reduced, Consumer's Experience is improved.
3. the localization of flow can largely reduce operator's backbone network flow pressure.
4. the reasonable of non-local nodes and local node non-with the localization that not only ensure that flow but also can have enough numbers
According to copy to ensure video smooth playing.
Brief description of the drawings
The flow localized FLASH P2P VOD system frameworks of Fig. 1,
Fig. 2 node selection algorithm flow charts,
Fig. 3 uses the FLASH P2P VOD system timing diagrams of flow localized algorithm.
Embodiment
Flow localized optimized treatment method in FLASH P2P VOD systems, solves a large amount of FLASH P2P flows pair
In the problem of operator's core network causes larger flow pressure, the selection course of node based on local node, non-local section
Point is as data trnascription, the following flow localized process of FLASH P2P VOD systems, and its corresponding flow chart and timing diagram are as schemed
2nd, shown in Fig. 3, detailed process is as follows：
(1) flow localized process
Shown in comprising the following steps that：
(1) when one video of node program request, node can ask first video segment to Redirect Server.
(2) Redirect Server can redirect requests to video storage server.
(3) node obtains video segment from video storage server, and plays.
(4) node applies for PEERID (unique 256 to RTMFP servers CUMULUS (RTMFP servers of increasing income)
Position character string), CUMULUS gives the unique PEERID of node one.
(5) node periodically to the current network delay (delay) of FLASH P2P TRACKER server registrations,
Current play time (currentTime), video time stamp (timeStamp), IP, BitMap etc..
(6) Tracker servers according to node IP address whether in same local network and node current network conditions
Deng M node for filtering out the video data for possessing node request in same local network forms node listing
(peerList).M is generally constant, and wherein M computational methods are as follows：
M=(bufferSize/pieceSize) * 6
BufferSize is video buffer size, and pieceSize is video slice size, and each video segment provides 6
Individual peer.
For example, take pieceSize=64K, i.e. the acquisition of any data of node, it is necessary to be that (ending is removed complete 64K
Outside), and original position offset%64K==0.
(7) node obtains peerList.
(8) during node requests data block X, the node parses the BitMap of peerList interior joints, selects and contains the number
According to six nodes of block..
(9) node sends hello packet to 6 local nodes simultaneously, to set up P2P connections.
(10) if a local node responds the node, REhello messages are returned to, then the node and the sound
Answer node to set up connection, and no longer set up and be connected with other nodes.
(11) if in request data process interior joint response timeout, the node sends connection to other nodes please
Ask, continue request data.
(12) if local node is not enough to provide data, the node sends to redirect to Tracker servers and asked
Ask, node request is redirected to the good non-local nodes of network condition by Tracker servers.
On the premise of localization obtains data as far as possible, add from non-local nodes and obtain flow, only local
When nodes are not enough to provide smooth broadcasting for the node, the node sends to Tracker servers and asked again,
Tracker servers will ask to be redirected to the good non-local nodes of network condition.Video point can largely be ensured
Broadcast process more smooth.
Claims (6)
1. the flow localized optimized treatment method in a kind of Internet video-on-demand system, it is characterised in that this method is applied
In FLASHP2P Internet video-on-demand systems, specific flow localized optimized treatment method is：
1) when one video of a node program request, the node can ask first video segment, the section to Redirect Server
The first video segment of point request is obtained from video content server, to ensure video smooth playing and follow-up good P2P
It is shared；
2) Redirect Server redirects requests to video storage server, and video storage server is deposited as super node
With real-time stream media protocol RTMFP and node-node transmission video data；
3) node obtains video segment from video storage server and played, node parsing video data, obtains video letter
Breath；
4) node obtains unique 256 character string PEERID, first with RTMFP server application PEERID, wherein, branch
Holding the server of RTMFP agreements includes increase income RTMFP servers CUMULUS or the server of other support RTMFP agreements；
CUMULUS gives the exchange of PEERID between the unique PEERID of node one, the not responsible node of RTMFP servers,
PEERID exchange is realized by Tracker servers；
5) node is periodically to Tracker server registrations nodal information to set up P2P groups, and the node is by current net
Network time delay delay, current play time currentTime, video time stamp timeStamp, IP, the bitmap of node downloading data
BitMap, address information are sent to Tracker servers；Wherein, node enters in itself when clicking on video connection to own net
Row, which is inquired about, is simultaneously stored in information in cookie, and this information is sent jointly into Tracker servers with own IP address, can be with
Accelerate Tracker servers and be localized packet, without may require that server spends resource to carry out analyzing and positioning to IP address；
Whether Tracker servers, in same local network and node current network conditions, are filtered out same according to node IP address
The M node formation node listing peerList of the video data for possessing the node request in one local network；Wherein M by
BufferSize and pieceSize calculates gained；BufferSize is video buffer size, and pieceSize is video segment
Size；
6) node is to other local node requested data blocks X, and the node is obtained after peerList in parsing peerList
The BitMap of node, selects six nodes containing the data block, and the node sends hello reports to 6 local nodes simultaneously
Text, to set up P2P connections；If a local node responds the node, REhello messages are returned to, then the node
Set up and be connected with the responsive node, and no longer set up and be connected with other nodes, connection carries out P2P data transfers after setting up；
If 7) in request data process interior joint response timeout, the node sends connection request to other nodes, continues
Request data, the same step 6) of detailed process；
8) if local node is not enough to provide data, the node sends to Tracker servers and redirects request,
Node request is redirected to the good non-local nodes of network condition by Tracker servers, is obtained in localization as far as possible
Access adds from non-local nodes on the premise of and obtains flow, only think that the node is carried in local nodes deficiency
During for smooth broadcasting, the node sends to Tracker servers and asked again, and Tracker servers will ask to redirect
To the good non-local nodes of network condition, it is ensured that video request-program process is more smooth.
2. the flow localized optimized treatment method in Internet video-on-demand system according to claim 1, its feature
It is, the Tracker servers are WEB server or other listservs, are exchanged for the PEERID between node, with
And user name and PEERID mapping, establishment, maintenance, the end of P2P shared groups.
3. the flow localized optimized treatment method in Internet video-on-demand system according to claim 1, its feature
It is the data of the request connection that initiator sends in handshake phase when two nodes set up connection to be the transmission hello packet
Bag.
4. the flow localized optimized treatment method in Internet video-on-demand system according to claim 1, its feature
It is the response hello packet that reciever is sent in handshake phase when two nodes set up connection to be the return REhello messages
Response data packet.
5. the flow localized optimized treatment method in Internet video-on-demand system according to claim 1, its feature
It is that the computational methods of the M are as follows：
M=(bufferSize/pieceSize) * 6
BufferSize is video buffer size, and pieceSize is video slice size, and each video segment provides 6
peer；The acquisition of any data of node must be complete, except ending, and original position offset%
PieceSize==0.
6. the flow localized optimized treatment method in Internet video-on-demand system according to claim 1, its feature
It is that the cookie is website to distinguish user identity, carries out session tracking and be stored on user local terminal
Data, generally go through encryption.
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| CN101964741A (en) * | 2009-07-25 | 2011-02-02 | 华为技术有限公司 | Method and equipment for sending node list |
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| US8966001B2 (en) * | 2008-09-02 | 2015-02-24 | Qualcomm Incorporated | Deployment and distribution model for improved content delivery system |
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| CN101964741A (en) * | 2009-07-25 | 2011-02-02 | 华为技术有限公司 | Method and equipment for sending node list |
| CN102006234A (en) * | 2010-12-09 | 2011-04-06 | 工业和信息化部电信传输研究所 | Method and device for optimizing P2P (Peer-to-Peer) network flow |
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Application publication date: 20150304 Assignee: Jiangsu Tuoyou Information Intelligent Technology Research Institute Co.,Ltd. Assignor: NANJING University OF POSTS AND TELECOMMUNICATIONS Contract record no.: X2021320000043 Denomination of invention: A traffic localization optimization method in Internet VOD system Granted publication date: 20170919 License type: Common License Record date: 20210616 |
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