CN104581192A - Low-delay and high-concurrency media stream distribution method based on multi-layer structure - Google Patents
Low-delay and high-concurrency media stream distribution method based on multi-layer structure Download PDFInfo
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- CN104581192A CN104581192A CN201410850172.8A CN201410850172A CN104581192A CN 104581192 A CN104581192 A CN 104581192A CN 201410850172 A CN201410850172 A CN 201410850172A CN 104581192 A CN104581192 A CN 104581192A
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- media stream
- server
- swap
- client
- swap server
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
- H04N21/23103—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion using load balancing strategies, e.g. by placing or distributing content on different disks, different memories or different servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
- H04N21/26216—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving the channel capacity, e.g. network bandwidth
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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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/437—Interfacing the upstream path of the transmission network, e.g. for transmitting client requests to a VOD server
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Computer And Data Communications (AREA)
Abstract
The invention discloses a low-delay and high-concurrency media stream distribution method based on a multi-layer structure. A core server layer, an exchange server layer and a user server layer are involved. The method includes the steps that after a user machine requests for a media stream, a user server determines whether the media stream which the user machine requests for has been in a service list of the user server or not, the media stream is directly sent to the user machine if the media stream which the user machine requests for has been in the service list of the user server, the request is sent to an exchange server if the media stream which the user machine requests for is not in the service list of the user server, the exchange server determines whether the media stream which the user machine requests for has been in a service list of the exchange server or not, the media stream is sent to the user server and then transmitted downwards to the user machine if the media stream which the user machine requests for has been in the service list of the exchange server, and the exchange server requests a core server for the media stream if the media stream which the user machine requests for is not in the service list of the exchange server. By means of the method, the number of concurrency users of classroom stream media is greatly increased; meanwhile, the utilization rate of all stages of servers is increased, and the bandwidth between the servers is reduced.
Description
Technical field
The present invention relates to a kind of streaming media distribution method, particularly relate to a kind of low delay based on sandwich construction, high concurrent media stream distributing method.
Background technology
In multimedia classroom environment, network online live time need transmission camera and microphone to gather data to video reception person.And when online numerous time, the disposal ability of single server is just not enough to the requirement supporting the real-time displaying video of all users.In this case generally can adopt server cluster, namely master server band multiple stage is from the structure of server, master server audio/video flow is pushed under it from server, be equivalent to the broadcast of data flow.But adopt in this way and still can produce some problems, when such as carrying out many live TV streams at the same time, the bandwidth demand between principal and subordinate's server is just very large, and principal and subordinate's server binds underaction by force simultaneously.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of low delay based on sandwich construction, high concurrent media stream distributing method, solve prior art under high complications, require wide bandwidth problem between principal and subordinate's server.
Technical scheme of the present invention is such, a kind of low delay based on sandwich construction, high concurrent media stream distributing method, and comprise and store and provide some Core servers of Media Stream, described Media Stream is provided with the ID for distinguishing mutually; At least two swap servers, every platform swap server is connected with whole Core server; Some client servers, every platform client server is connected with at least two swap servers, and subscriber computer is connected with client server; The process that subscriber computer obtains Media Stream is:
1) subscriber computer sends request the client server connected to it, comprises ID and the catalogue of Media Stream in solicited message;
2), after client server receives request, process in accordance with the following steps:
2a) inquire about the Media Stream list that this client server is being served, judge whether this Media Stream exists according to Media Stream ID, if existed, directly by this media stream to subscriber computer, process ends; If there is no, step 2b is entered);
2b) inquire about the state of swap server in the swap server list of this client server, selection mode is available swap server, enters step 2c); If all swap server states are all unavailable in swap server list, return error message, process ends;
2c) client server initiates request to the swap server selected, and comprises ID and the catalogue of Media Stream in solicited message;
3), after swap server receives request, process in accordance with the following steps:
3a) inquire about the Media Stream list that this swap server is being served, judge whether this Media Stream exists according to Media Stream ID, if existed, directly by this media stream to client server, process ends; If there is no, step 3b is entered);
3b) according to the directory information in solicited message, select corresponding Core server, and the ID of Media Stream and catalogue are sent to the Core server of this correspondence;
4) after Core server receives request, according to ID and the directory information of Media Stream in solicited message, the Media Stream of asking is determined, and by this media stream to the swap server of request service;
5) after swap server receives Media Stream, by media stream to client server;
6) after client server receives Media Stream, by media stream to subscriber computer, process ends.
Further, described step 2b) for inquire about this client server successively swap server list in the shape body of swap server, select First state to be available swap server, enter step 2c); If all swap server states are unavailable, return error message, process ends.
Technical scheme provided by the present invention, when few increase time delay, greatly increases the concurrent user number of classroom Streaming Media, improves the utilance of server at different levels simultaneously, reduce the bandwidth between server at different levels, have following effect:
A) Streaming Media arrives the process of recipient from source, and the time delay consumed on the server is very low, almost negligible.
B) computational resource of single medium stream takies very low, and single server, under the support of enough bandwidth, can support that more than thousand people's is concurrent.
C) whole system can support 1,000,000 grades concurrent.
D) ask as required, when multilayer is mutual, from active obtaining top service device when needing, when not needing, do not account for the resource of top service device.
E) fault of separate unit client server only can affect the user under it, can not affect other users.
F) multichannel backup, can be switched to reserve link fast when primary link failure, make service uninterrupted.
Accompanying drawing explanation
Fig. 1 is network topology schematic diagram.
Fig. 2 is medium stream request distribution procedure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but not as a limitation of the invention.
Incorporated by reference to Fig. 1 and Fig. 2, the server hierarchies that the present embodiment relates to is arranged, is specifically divided into:
Kernel service layer: be made up of four Core servers, Core server is the source of Media Stream, and this stratum server provides different Media Streams, and Media Stream is distinguished by ID, and ID is 64 integers from 1.
Exchange Service layer: be made up of three swap servers, be responsible for bridge joint kernel service layer and user service layer, form the cluster of server, subscribe to the media stream resources of all Core servers on all kernel service layers, provide complete Media Stream list to user service layer.
User service layer: be made up of six client servers, is responsible for the connection of actual user's machine, and gives subscriber computer media stream.The every station server of this layer connects at least two swap servers, and channeling link backup mechanism, when the swap server used is unavailable, can enable the swap server of certain reserve link fast, realizes the effect continued to flow.
As shown in Figure 2, its process is as follows for the Requests routing process of Media Stream:
1) after user selects certain Media Stream by subscriber computer, subscriber computer sends request the client server connected to it, comprises ID and the catalogue of Media Stream in solicited message.
2), after client server receives request, client server processes in accordance with the following steps:
2a) inquire about Media Stream: inquire about the Media Stream list that this client server is being served, judge whether this Media Stream exists according to Media Stream ID.If existed, directly by this media stream to subscriber computer, process terminates; If there is no, step 2b is entered).
2b) select swap server: the state of inquiring about swap server in the swap server list of this client server successively, if its state is available, then select this swap server; If unavailable, judge swap server state thereafter, until last station server in swap server list.If chosen available swap server, enter step 2c); If do not chosen, return error message, process ends.
2c) client server initiates request to the available swap server selected, and comprises ID and the catalogue of Media Stream in solicited message.
3), after swap server receives request, process in accordance with the following steps:
3a) inquire about Media Stream: inquire about the Media Stream list that this swap server is being served, judge whether this Media Stream exists according to Media Stream ID.If existed, directly by this media stream to client server, process terminates; If there is no, step 3b is entered).
3b) select Core server: according to the directory information in solicited message, select any platform Core server to provide service, and the ID of Media Stream and catalogue are sent to selection Core server.
4) after Core server receives request, according to ID and the directory information of Media Stream in solicited message, the Media Stream of asking is determined, and by this media stream to the swap server of request service.
5) after swap server receives Media Stream, by media stream to client server.
6) after client server receives Media Stream, by media stream to subscriber computer, process ends.
Claims (2)
1. based on low delay, the high concurrent media stream distributing method of sandwich construction, it is characterized in that, comprise and store and provide some Core servers of Media Stream, described Media Stream is provided with the ID for distinguishing mutually; At least two swap servers, every platform swap server is connected with whole Core server; Some client servers, every platform client server is connected with at least two swap servers, and subscriber computer is connected with client server; The process that subscriber computer obtains Media Stream is:
1) subscriber computer sends request the client server connected to it, comprises ID and the catalogue of Media Stream in solicited message;
2), after client server receives request, process in accordance with the following steps:
2a) inquire about the Media Stream list that this client server is being served, judge whether this Media Stream exists according to Media Stream ID, if existed, directly by this media stream to subscriber computer, process ends; If there is no, step 2b is entered);
2b) inquire about the shape body of swap server in the swap server list of this client server, selection mode is available swap server, enters step 2c); If all swap server states are all unavailable in swap server list, return error message, process ends;
2c) client server initiates request to the swap server selected, and comprises ID and the catalogue of Media Stream in solicited message;
3), after swap server receives request, process in accordance with the following steps:
3a) inquire about the Media Stream list that this swap server is being served, judge whether this Media Stream exists according to Media Stream ID, if existed, directly by this media stream to client server, process ends; If there is no, step 3b is entered);
3b) according to the directory information in solicited message, select corresponding Core server, and the ID of Media Stream and catalogue are sent to the Core server of this correspondence;
4) after Core server receives request, according to ID and the directory information of Media Stream in solicited message, the Media Stream of asking is determined, and by this media stream to the swap server of request service;
5) after swap server receives Media Stream, by media stream to client server;
6) after client server receives Media Stream, by media stream to subscriber computer, process ends.
2. the low delay based on sandwich construction according to claim 1, high concurrent media stream distributing method, it is characterized in that, described step 2b) for inquire about this client server successively swap server list in the state of swap server, select First state to be available swap server, enter step 2c); If all swap server states are unavailable, return error message, process ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850172.8A CN104581192B (en) | 2014-12-31 | 2014-12-31 | A kind of low delay based on sandwich construction, high concurrent media flow distribution method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850172.8A CN104581192B (en) | 2014-12-31 | 2014-12-31 | A kind of low delay based on sandwich construction, high concurrent media flow distribution method |
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| CN104581192A true CN104581192A (en) | 2015-04-29 |
| CN104581192B CN104581192B (en) | 2018-01-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107333080A (en) * | 2017-05-24 | 2017-11-07 | 清华大学 | A kind of high speed, high resolution image data recording method, apparatus and system |
Citations (2)
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| US20050235047A1 (en) * | 2004-04-16 | 2005-10-20 | Qiang Li | Method and apparatus for a large scale distributed multimedia streaming system and its media content distribution |
| CN102209041A (en) * | 2011-07-13 | 2011-10-05 | 上海红神信息技术有限公司 | Scheduling method, device and system |
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2014
- 2014-12-31 CN CN201410850172.8A patent/CN104581192B/en active Active
Patent Citations (2)
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| US20050235047A1 (en) * | 2004-04-16 | 2005-10-20 | Qiang Li | Method and apparatus for a large scale distributed multimedia streaming system and its media content distribution |
| CN102209041A (en) * | 2011-07-13 | 2011-10-05 | 上海红神信息技术有限公司 | Scheduling method, device and system |
Non-Patent Citations (2)
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| 吕燕乐: "P2P与组播技术在流媒体中的研究与应用", 《中国优秀硕士学位论文全文数据库》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107333080A (en) * | 2017-05-24 | 2017-11-07 | 清华大学 | A kind of high speed, high resolution image data recording method, apparatus and system |
| CN107333080B (en) * | 2017-05-24 | 2019-11-22 | 清华大学 | A kind of high speed, high resolution image data recording method, apparatus and system |
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| CN104581192B (en) | 2018-01-30 |
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