CN1471316A - New-generation distributed video on demand (VOD) service technique - Google Patents
New-generation distributed video on demand (VOD) service technique Download PDFInfo
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- CN1471316A CN1471316A CNA021253218A CN02125321A CN1471316A CN 1471316 A CN1471316 A CN 1471316A CN A021253218 A CNA021253218 A CN A021253218A CN 02125321 A CN02125321 A CN 02125321A CN 1471316 A CN1471316 A CN 1471316A
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Abstract
Two main factors for determining the performance of audio/video stream transmitting on network are network bandwidth and I/O throughput rate of storage device. Also the two factors determine cost for building network. In the invention, traditional functional module of server of video on demand (VOD) is divided into several modules (video server, dispatching server, WWW server and living broadcast server). Based on the need, each server is configured. Player is worked with several servers collaboratively so as to constitute a effective distributed VOD service system. The system possesses good expandability. The invention also puts forward a solution of VOD system based on metropolitan area network.
Description
1 technical field
The present invention is absorbed in solution and how makes full use of the transmission service of Internet resources with audio/video flow that VOD is provided, provides a solution of realizing this service simultaneously.
2 technical backgrounds
The network bandwidth and memory device input and output (hereinafter to be referred as IO) throughput are that the decision audio/video flow transmits audio/video flow on the network of two main factor 100MBPS (MBPS refers to per second 1M bit) of the property that transmits on the network, and the server that is used to transmit data only needs the network interface card of a 100MBPS and the IO equipment of 100MBPS to get final product.But the network of 100MBPS can only transmit the MPEG1 audio/video flow of the motion picture expert group (MPEG) of the 1.5MBPS about 70 at most.Calculate in such a way, the network of 1000MBPS can transmit the MPEG1 audio/video flow of the 1.5MBPS about 700.Require server that the network interface card of 1000MBPS and the memory device that matches are arranged simultaneously.
Existing many broadband networks, as sub-district, campus, hotel and metropolitan area network etc., mostly its backbone network is 1000MBPS, mostly its branching networks are 100MBPS.Especially, for metropolitan area network (as telecommunications or broadcasting and TV), if it provides VOD service, then its customer volume will be very big, if adopt a station server to do VOD service, require this station server performance requirement will be very high so, thereby its construction cost can be very big; And the user data that it is supported is limited.
The present invention will propose a kind of effective solution, realize supporting more user with less construction cost, to support the VOD service system of a large number of users.
3 summary of the invention
The present invention is by the collaborative work of player, video server, dispatch server, www server and direct broadcast server, to realize a kind of effective distributed VOD service system; And the solution of a kind of effective metropolitan area network VOD system is proposed with this.
4 description of drawings
Fig. 1 provides the framework of distributed server system, and equipment all among the figure can also can interconnect by switch in same local area network (LAN);
Fig. 2 provides the cooperative working process of player, video server, dispatch server, www server and the direct broadcast server of audio/video flow.
Fig. 3 provides a support large user number, the network topological diagram of distributed metropolitan area network VOD server system.
5 embodiments
The groundwork of the player of audio/video flow (hereinafter to be referred as player) is mutual with video server, dispatch server and www server, to obtain the audio/video flow data and the broadcast of demand from video server; It obtains the live data flow of direct broadcast server by video server.
The groundwork of video server is the request according to dispatch server and player, obtains data flow from memory device or direct broadcast server, and sends player to.In a system, video server can have a plurality of, and they are dispatched by dispatch server.
The groundwork of dispatch server is according to the request of player and the current state of each video server, and decision is the player service by which video server.
Www server provides the program of audio/video flow to search function.
The live data of audio/video flow data, file data or another direct broadcast server that direct broadcast server can collect hardware device are undertaken live by User Datagram Protoco (UDP) (UDP).
Fig. 1 has provided a connection example of above server.In the figure, video server, dispatch server and www server all link to each other with same database; Video server also interconnects with memory device; Direct broadcast server links to each other with the hardware collecting device; These servers link to each other with the external world by a common switch or router.
Notice that two video servers and two direct broadcast servers are arranged among this figure.Video server 1 and 2 is regulated by invoking server.Video server 1 and 2 can be transmitted the data of direct broadcast server 1 and 2.
Because these transmission control protocol server (TCP) intercom mutually,, and can run on different system platforms so they can be in the different networks.
Distributed Services system of the present invention can make full use of computer resource (network bandwidth and computing power etc.).Task difference according to server, can dispose different hardware:
● the groundwork of video server is to send the audio/video flow data, and its bottleneck is memory device I O throughput, and it is less demanding for center processor (CPU) etc.;
● the groundwork of dispatch server is authenticated user and scheduling video server work, its require for data search and computing wants fast, its bottleneck is cpu performance, it is less demanding for memory device I O throughput;
● the www server groundwork provides the WWW service, and it is less demanding for server performance, and it can run on same hardware platform with dispatch server;
● the groundwork of direct broadcast server is that reading data flow carries out lively from the hardware collecting device, and it is not high to the performance demands of server yet; If be live several roads programs, and adopt the hardware-compressed mode, then adopt a common personal computer (PC) to get final product.
Fig. 2 has provided the process of the collaborative work of player and several servers, sets forth the process of player general programs of program request and programme televised live from the VOD server system below with reference to its.
Client is passed through the IE browser to www server request the rendition list (201 among Fig. 2), after www server obtains request, the authentication customer information, and to database lookup programme information (202 among Fig. 2), and return the result (203 among Fig. 2 and 204) who searches.
By searching specifically, player can obtain the IP address and the port of dispatch server, and obtains the name of program.If the information that obtains is not enough, then player stops request.
Player sends the programm name that obtains to dispatch server (205 among Fig. 2) to obtain the concrete program names and the information of video server.After dispatch server obtains this request, the relevant information (206 among Fig. 2) of searching program in the database; If can not find the relevant information of program, then return error message (207 among Fig. 2 and 210), so the current request failure of player to player.If dispatch server has found relevant information, then can search the video server that it is managed, which video server to be the player service with decision by.Suppose that dispatch server thinks that video server 1 has the ability to support the current program request of player now, then its can send the information of player and the information that finds to video server 1 (208 among Fig. 2).Whether video server 1 agrees the scheduling of dispatch server according to the situation decision of self, and the result is sent to dispatch server (209 among Fig. 2).If video server is not supported the scheduling of dispatch server, then dispatch server is attempted other video server of scheduling.At last the result of scheduling is returned to player (210 among Fig. 2).
By searching specifically, the procotol of the video server that player can specifically be supported (IP) address and port, and the out of Memory that returns of dispatch server.If the information that obtains is not enough, then player stops request.
The request (211 among Fig. 2) that IP address that player returns according to dispatch server and port send data flow to video server.Video server authenticates the solicited message of player, whether has obtained the dispatch server approval of appointment to determine this request; If video server thinks that the request of player is illegal, then player is directly returned and do not support (214 among Fig. 2).
If the request of video server approval player then can be arrived in the memory device reading of data and be sent to player (212,213 among Fig. 2 and 214); Like this, the audio/video flow that player just can obtain and broadcast video server transmits.After video server had transmitted data, it can write information on services (215 among Fig. 2) in database.
So far, player has just been finished once complete order request.This process has been set forth player and www server, dispatch server and video server collaborative work, to realize distributed VOD service.
If user's program request is programme televised live stream, then said process is slightly different.This process 201 to 211 all is identical from Fig. 2.As video server find the player program request be programme televised live stream the time, its can obtain live audio/video flow data (216 Fig. 2 and 219) from the direct broadcast server of player appointment; Direct broadcast server can be obtained the audio/video flow data and carry out live (218 among Fig. 2 and 219) from the hardware collecting device, simultaneously, the hardware collecting device can carry out program request to the deposit data that collects in the memory device of appointment (220 among Fig. 2) for the user.
The present invention realizes Distributed Services is adopted in the request of player by top method.This distributed service system can adapt to different network environments.
For the less network of number of users, as support 50 users, can use a server (several services can be installed on the same server), adopt the server of the network interface card that has 100MBPS to get final product.
For the medium network of number of users, as support 500 users, then can use the backbone network of 1000MBPS, the WWW service may reside on the station server with dispatch service, can use the server of (or several) better performances as video server separately.
For the more network of number of users, as support 500 more than the user, then can adopt the method (as Fig. 3) of (or a plurality of) network center and a plurality of data point of departures.
Fig. 3 is the network topology structure of the VOD service system of a metropolitan area network.It is made up of the branch center in a network center and three cities.In network center, it has video server, direct broadcast server, dispatch server, www server etc. simultaneously; It can be the customer service in all city simultaneously; Simultaneously, its dispatch server can be dispatched the video server in different cities.At city A, suppose that the user data in this city is many, then there is dispatch server and the video server of oneself this branch center; The video server of this branch center is arranged by the dispatch server of this branch center.At city B, it has only a video server, and this server is arranged by the dispatch server of network center.At city C, because number of users is less, so have only a switch/router, the user's in its city request will be directed to network center.
This distributed service system has good expandability, and can effectively save network construction cost.As can be seen from Figure 3, when the number of users of this metropolitan area network VOD system more after a little while, only need a network center to get final product.Along with user's increase, can be in the more branch center of regional construction of user, this center can progressively increase video server, dispatch server and other server etc. then since an independent switch.Because adopt modularized design scheme, system's expansion capacity is very strong.Increase suitable equipment in due course, this is a kind of method of effective saving network construction cost.
Although the present invention is some part is to describe according to representative instance, can consider to implement the present invention according to top description within the scope of the appended claims.
Claims (3)
1. the collaborative work by player, video server, dispatch server, www server and direct broadcast server realizes a kind of effective distributed video request program (hereinafter to be referred as VOD) service system method; The method comprising the steps of:
Player is by the relevant information of IE browser to www server request VOD program source information and dispatch server;
Player sends request according to the return information of www server to dispatch server;
Dispatch server returns the information of available video server to player;
Player sends the information of obtaining concrete program stream to the video server of dispatch server appointment; Reading data flow and broadcast from video server.
2. the method for claim 1 also comprises the method for dispatch server and video server collaborative work, and the method comprising the steps of:
Dispatch server is player service with preliminary decision by which video server according to the solicited message of player, and sends dispatch request to this video server;
The video server that is scheduled is according to the situation of self, and whether decision supports the request of dispatch server, and feeds back to dispatch server;
If the video server of appointment is not supported the request of dispatch server, then dispatch server can be attempted sending request to other video server, up to having attempted by all video servers of its management; Dispatch server can return to the client to the result who searches scheduling;
If video server is accepted the request of dispatch server, whether legal information that then can the recording dispatching server with the request of judging player as next step sign.
3. the method for claim 1 also comprises the method for the collaborative work of video server and player, and this method also comprises step:
Player sends request to video server, and wherein information requested comprises the information that dispatch service is returned;
Video server is according to the solicited message of player, and according to the own request that the response message of dispatch server is judged whether to support player;
If support the request of player, then transmit data designated stream to player; If do not support, the then request of player failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021253218A CN1471316A (en) | 2002-07-25 | 2002-07-25 | New-generation distributed video on demand (VOD) service technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA021253218A CN1471316A (en) | 2002-07-25 | 2002-07-25 | New-generation distributed video on demand (VOD) service technique |
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| CN1471316A true CN1471316A (en) | 2004-01-28 |
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| CNA021253218A Pending CN1471316A (en) | 2002-07-25 | 2002-07-25 | New-generation distributed video on demand (VOD) service technique |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007093122A1 (en) * | 2006-02-14 | 2007-08-23 | Tencent Technology (Shenzhen) Company Limited | A demand server system, a collect demand data system and a demand server method |
| CN100438621C (en) * | 2005-05-31 | 2008-11-26 | 宋虹 | Method for managing system of living broadcast of programs |
| CN101110947B (en) * | 2007-06-26 | 2010-09-29 | 中兴通讯股份有限公司 | Service scheduling method for interactive television system |
| CN104506924A (en) * | 2014-12-23 | 2015-04-08 | 成都德芯数字科技有限公司 | High-integration-level IPTV (Internet Protocol Television) system and working method thereof |
| CN108366097A (en) * | 2018-01-18 | 2018-08-03 | 北京奇艺世纪科技有限公司 | Resource access control method and system |
-
2002
- 2002-07-25 CN CNA021253218A patent/CN1471316A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438621C (en) * | 2005-05-31 | 2008-11-26 | 宋虹 | Method for managing system of living broadcast of programs |
| WO2007093122A1 (en) * | 2006-02-14 | 2007-08-23 | Tencent Technology (Shenzhen) Company Limited | A demand server system, a collect demand data system and a demand server method |
| CN101110947B (en) * | 2007-06-26 | 2010-09-29 | 中兴通讯股份有限公司 | Service scheduling method for interactive television system |
| CN104506924A (en) * | 2014-12-23 | 2015-04-08 | 成都德芯数字科技有限公司 | High-integration-level IPTV (Internet Protocol Television) system and working method thereof |
| CN108366097A (en) * | 2018-01-18 | 2018-08-03 | 北京奇艺世纪科技有限公司 | Resource access control method and system |
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