CN101127883A - Network TV system and content scheduling method for system recording and playing - Google Patents
Network TV system and content scheduling method for system recording and playing Download PDFInfo
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Abstract
The utility model discloses a network television system and a dispatching method for recording and broadcasting the content of the system, comprising ordering request data and a statistical period, wherein ordering service requests of the users to the recorded and broadcast content are recorded in the form of data to form the ordering request data; the statistical period is divided into a plurality of time slices; the ordering request data in one statistical period is processed to obtain the ordering statistical data of the ordering time of all live-broadcast channels in all time slices; the ordering statistical data are processed to obtain the ordering forecast data of the next statistical period; the ordering forecast data are utilized to form the ordering dispatching data of the next statistical period and send dispatching tasks to the manager based on the ordering dispatching data, and the manager implements the task and dispatches the recorded and broadcast content of the corresponding live-broadcast channels in corresponding time slices to designated nodes. The utility model utilizes the service resources of common nodes effectively and realizes service request load equilibrium of recorded and broadcast content from the users.
Description
Technical field
The present invention relates to network television system, particularly relate to a kind of network television system and a kind of recorded broadcast content scheduling method that is used for this system that comprises content delivery network.
Background technology
Content distributing network (CDN) is the important module in Web TV (IPTV) system, and it is adaptive etc. mainly to be responsible for network management, content control, service control, the Streaming Media interface of distributed flow media.As shown in Figure 1, CDN10 mainly comprises manager 11 and a plurality of node 13,16 that is equipped with database 12.Manager 11 is responsible for network management, overall content control and global service control, and is respectively arranged with corresponding module M1, M2, M3.Be provided with at least one agency 14/17 who links to each other with manager 11 and a plurality of streaming media servers 15/18 that link to each other with corresponding agency 14/17 respectively in each node.It is adaptive to act on behalf of main responsible node management, node content control, node service control and Streaming Media interface.Manager 11 carries out global administration by each agency to all streaming media servers in the system.
In the IPTV system, recorded broadcast is meant that system is kept at the form of the content of broadcasting with media file on the media bank according to certain rule or plan in direct broadcast band, watch for user's program request.Recorded broadcast service makes the user can watch the TV programme of oneself liking at any time, and need not be subjected to the restriction of time.Because direct broadcast band is a lot, and mostly be 24 hours uninterrupted broadcasts greatly, in order to guarantee watching of user, system often needs all live content are all preserved, and makes that recorded broadcast content stores data volume is huge.
In the IPTV of multinode system, in order to guarantee service quality, avoid service pressure too to concentrate on the individual node, often need the recorded broadcast content is all stored on all nodes.Yet in actual motion, this storage mode can cause very big storage pressure to system.Simultaneously, also cause the raising of construction of IPTV system and O﹠M cost.
In order to reduce the storage pressure that the recorded broadcast content causes system, should avoid the recorded broadcast content in each node repeated storage as far as possible.Common practices is to select a node (for example node among Fig. 1 13) as Centroid, increases its media bank capacity and media server ability, and this Centroid to the IPTV system in all direct broadcast bands record, and preserve the recorded broadcast content; By the global service control module of CDN manager 11, all users' order request is navigated on the streaming media server of Centroid and serve.This way can reduce the global storage pressure of system, but can increase the service pressure of Centroid, and simultaneously, the Service Source of other ordinary node also can't be utilized effectively in the system.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of recorded broadcast content scheduling method that is used for network television system is provided, make it possible to make full use of the Service Source of each node in the system, in the global storage pressure that reduces network television system, reduce the service pressure of Centroid.
Another technical problem that the present invention will feel is, a kind of network television system is provided, and makes the global storage pressure of this system and the service pressure of Centroid all reduce.
For achieving the above object, the present invention proposes a kind of recorded broadcast content scheduling method that is used for network television system.Described network television system comprises content distributing network, and described content distributing network comprises manager and a plurality of node, and described a plurality of nodes comprise that one is used for all direct broadcast bands are recorded to form the Centroid of recorded broadcast content.Described method comprises: with the order program service request to the recorded broadcast content of the form recording user of data, form the order request data, comprise direct broadcast band information and service request time in every order request data at least; Set a statistics cycle, and it is divided into a plurality of time periods; Order request data in the measurement period are handled, obtained writing down the program request statistics of each direct broadcast band video-on-demand times in each time period; Described program request statistics is handled, obtained the program request prediction data of next measurement period; Utilize this program request prediction data to form the program request data dispatching of next measurement period; And, issue scheduler task according to described program request data dispatching to described manager so that manager carry out this task with the recorded broadcast content scheduling of respective live channel in the corresponding time period to specified node.
Described method also comprises: the Promgramming cycle according to direct broadcast band is determined described measurement period, and the length of determining the described time period according to the program duration of described direct broadcast band.Preferably the length of described measurement period is a week, and the length of described time period is one hour.
The described step that order request data in the measurement period are handled comprises, first second of each time period in a time period order request data of each direct broadcast band add up respectively.
The described step that the program request statistics is handled comprises: utilize this measurement period program request statistics before to form historical program request statistics; The program request statistics of this measurement period is multiplied by one first weight coefficient, calculates first and analyze data; Historical program request statistics is multiplied by one second weight coefficient, calculates second and analyze data; And, described first, second analyzed the data addition, thereby obtain the program request prediction data of next measurement period according to time corresponding section and corresponding direct broadcast band.
Described historical program request statistics is the mean value that the program request statistics of the measurement period of all or predetermined quantity before this measurement period is pressed the measurement period number.
The described step of utilizing the program request prediction data to form the program request data dispatching comprises: the size of each the bar data in the described program request prediction data according to prediction program request number sorted from big to small; And, choose the data of predetermined quantity from big to small, preserve wherein corresponding direct broadcast band information and time period information, form described program request data dispatching.The data of described predetermined quantity are rank in preceding 20% data.
When described network television system can only be when described Centroid carries out recorded broadcast to direct broadcast band, the described step that issues scheduler task according to the program request data dispatching is: Centroid record finish after, issue recorded broadcast content distributed tasks to manager, so that the recorded broadcast content of corresponding channel in the corresponding time period that manager will be recorded in this program request data dispatching is distributed to this specified node from Centroid.
When all nodes of described network television system all can carry out recorded broadcast to direct broadcast band, the described step that issues scheduler task according to the program request data dispatching is: issue recorded broadcast task at this specified node to described manager, so that in the corresponding time period that manager writes down, control the content that this specified node is recorded the corresponding direct broadcast band that writes down in this program request data dispatching in this program request data dispatching.
For achieving the above object, the invention allows for a kind of network television system that comprises content distributing network, described content distributing network comprises manager and a plurality of node, and described a plurality of nodes comprise that one is used for all direct broadcast bands are recorded to form the Centroid of recorded broadcast content.Wherein, described manager is equipped with database, is used for forming the order request data with the order program service request to the recorded broadcast content of the form recording user of data, comprises direct broadcast band information and service request time in every order request data at least.Be provided with recorded broadcast content stores scheduler module in the described manager, this memory scheduling module comprises: the program request statistic unit, be used for the order request data in the measurement period are handled, obtain the program request statistics of the video-on-demand times of each direct broadcast band in each time period; The program request analytic unit is used for the program request statistics that obtains is handled the program request prediction data that obtains next measurement period, and utilizes this program request prediction data to form the program request data dispatching of next measurement period; And recorded broadcast content scheduling unit, be used for issuing scheduler task to described manager according to described program request data dispatching, with the recorded broadcast content scheduling of respective live channel in the corresponding time period to specified node.
Utilize method of the present invention, can preserve under the prerequisite of all recorded broadcast contents at Centroid, by the global service controlled function of CDN manager, the recorded broadcast content scheduling that user's program request rate is high is to ordinary node.Thereby when reducing entire system memory capacity, service pressure when also having reduced the peak of Centroid has been realized system service resource and storage resources optimization are used.IPTV of the present invention system is abundant utilizes the Service Source of ordinary node in the system, and load balancing in the time of can realizing the peak of user's order program service request has improved the service quality of user's program request, can also reduce the construction and the operation expense of IPTV system simultaneously.
The present invention is described in detail with detailed execution mode below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the structural representation according to CDN in the IPTV system of prior art;
Fig. 2 is the structural representation according to CDN manager in the IPTV of the present invention system;
Fig. 3 is the flow chart of recorded broadcast content scheduling method of the present invention;
Fig. 4 is for obtaining the flow chart of program request prediction data according to an embodiment of the invention;
Fig. 5 is for issuing the flow chart of scheduler task according to an embodiment of the invention.
Embodiment
The Promgramming of direct broadcast band has the relatively-stationary cycle usually.Simultaneously, the program request frequency of the different periods of user in one-period to each direct broadcast band recorded broadcast content also has certain rules, promptly can be very big to the program request number of certain channel in a certain period, even reach peak value, and in other period or less relatively to the program request number of other channel.The present invention sets measurement period according to the Promgramming cycle of direct broadcast band, by the order request in the measurement period is carried out statistics and analysis, can dope the user's program request situation in next measurement period, thereby manager 11 can predict the outcome according to this recorded broadcast content of following one-period is in a planned way dispatched, and the content scheduling that the program request number is higher is in ordinary node.
The method according to this invention is recorded in the user in the database 12 to the order program service request of the recorded broadcast content form with data, forms order request data D1, so that statistics and analysis is carried out in user's program request behavior.All record corresponding direct broadcast band information and service request time in every order request data.
Here, the length of measurement period is set to a week.Simultaneously, according to the program duration characteristics of direct broadcast band, can be a time period measurement period to be divided with one hour, the order request in each time period is added up respectively.Like this, a measurement period just has been divided into 24 * 7=168 time period.Certainly, according to the real work situation of IPTV system, the length of measurement period and time period also can be set at other value.
As shown in Figure 2, according to the present invention, in the CDN manager 11 except being provided with foregoing network management module M1, overall content control module M2 and global service control module M3, also be provided with recorded broadcast content stores scheduler module M4, it comprises recorded broadcast content-on-demand statistic unit U1, recorded broadcast content-on-demand analytic unit U2 and these three functional units of recorded broadcast content scheduling unit U3.Describe recorded broadcast content scheduling method of the present invention in detail with reference to Fig. 3 and in conjunction with the concrete function of these three unit below.
At first, utilize program request statistic unit U1 that all the order request data D1 in the measurement period are handled, to obtain program request statistics D2 (step S10).In program request statistics D2, record each direct broadcast band in each time period by the number of times of program request.Preferably, can the order request data of each direct broadcast band in the previous time period be added up first second of each time period (promptly per hour).Repeat this process, can obtain the program request statistics D2 in the whole measurement period.According to one embodiment of present invention, step S10 can realize by issuing statistics task to program request statistic unit U1.
Behind the program request statistics D2 that has obtained about whole measurement period, utilize recorded broadcast content-on-demand analytic unit U2 that this program request statistics D2 is handled, to obtain the program request prediction data D3 (step S20) of next measurement period.According to one embodiment of present invention, program request prediction data D3 can obtain by method shown in Figure 4.At first, utilize this measurement period program request statistics before to form historical program request statistics D5 (step S21).Here, historical program request statistics D5 is the mean value that the program request statistics of the measurement period of all or specified quantity before this measurement period is pressed the measurement period number.Then, the program request statistics D2 of this measurement period is multiplied by the first weight coefficient a1 calculates first and analyze data (step S22), and historical program request statistics D5 is multiplied by the second weight coefficient a2 calculates second and analyze data (step S23).According to time corresponding section and corresponding direct broadcast band, described first, second analyzed the data addition, can obtain the program request prediction data D3 (step S24) of next measurement period, that is, and D3=a1 * D2+a2 * D5.Coefficient a1 and a2 can determine according to the real work situation of IPTV system, be respectively 0.8 and 0.2 here.Preferably, step S20 is chosen in user's recorded broadcast program request lower period of rate, and for example beginning was on every Mondays carried out in several hours, analyzes the influence of elapsed time to memory scheduling to reduce.
Afterwards, utilize recorded broadcast content-on-demand analytic unit U2 to obtain the program request data dispatching D4 (step S30) of next measurement period, with as the foundation that recorded broadcast of following one-period content is carried out memory scheduling by program request prediction data D3.According to one embodiment of present invention, program request data dispatching D4 can obtain by the following method.At first, the size of each the bar data among the program request prediction data D3 by prediction program request number sorted from big to small; Then, choose the data of predetermined quantity from big to small, wherein direct broadcast band information and time corresponding segment information are preserved, to form program request data dispatching D4.Described predetermined quantity can be set as required,, chooses rank in preceding 20% data here, preserves corresponding direct broadcast band information and time period information.
Afterwards, recorded broadcast content scheduling unit U3 can issue the memory scheduling task to manager according to the program request data dispatching D4 that obtains, with the recorded broadcast content scheduling that will be recorded in the respective live channel in the corresponding time period among the program request data dispatching D4 to specified node (step S40).According to the recorded broadcast implementation method, the IPTV system can be divided into single node recording and broadcasting system and multinode recording and broadcasting system.In the single node recording and broadcasting system, have only Centroid to carry out recorded broadcast to direct broadcast band; And in the multinode recording and broadcasting system, intrasystem arbitrary node can both carry out recorded broadcast to direct broadcast band.For different recording and broadcasting systems, recorded broadcast content scheduling unit U3 can issue different memory scheduling tasks, as shown in Figure 5.
For the single node recording and broadcasting system, recorded broadcast content scheduling unit U3 can Centroid record finish after, issue recorded broadcast content distributed tasks (step S41) to the overall content control module M2 of manager 11.Afterwards, overall content control module M2 carries out this task, and the recorded broadcast content of the respective live channel in the corresponding time period that is recorded among the program request data dispatching D4 is distributed to specified node from Centroid, thereby realizes the scheduling (step S43) of recorded broadcast content.For the multinode recording and broadcasting system, recorded broadcast content scheduling unit U3 can issue the recorded broadcast task (step S42) at specified node to the overall content control module M2 of manager 11.Afterwards, overall content control module M2 carries out this task, and in the time period of writing down in program request data dispatching D4, the control specified node is recorded the content (step S43) of the corresponding direct broadcast band that writes down among this program request data dispatching D4.
Though should be pointed out that invention has been described by above-mentioned execution mode, yet the present invention also can have other numerous embodiments.Without departing from the spirit and scope of the present invention; those of ordinary skill in the art obviously can make various corresponding changes and distortion to the present invention, but these changes and distortion all should belong in the scope that claims of the present invention and equivalent thereof protect.
Claims (10)
1. recorded broadcast content scheduling method that is used for network television system, described network television system comprises content distributing network, described content distributing network comprises manager and a plurality of node, described a plurality of node comprises that one is used for all direct broadcast bands are recorded to form the Centroid of recorded broadcast content, it is characterized in that described method comprises the steps:
With the order program service request of the form recording user of data to the recorded broadcast content, form the order request data, comprise direct broadcast band information and service request time in every order request data at least;
Set a statistics cycle, and described measurement period is divided into a plurality of time periods;
Order request data in the measurement period are handled, obtained writing down the program request statistics of each direct broadcast band video-on-demand times in each time period;
Described program request statistics is handled, obtained the program request prediction data of next measurement period;
Utilize this program request prediction data to form the program request data dispatching of next measurement period; And
Issue scheduler task according to described program request data dispatching to described manager so that described manager carry out this debugging task with the recorded broadcast content scheduling of respective live channel in the corresponding time period to specified node.
2. method according to claim 1 is characterized in that, also comprises: the Promgramming cycle according to direct broadcast band is determined described measurement period, and the length of determining the described time period according to the program duration of described direct broadcast band.
3. method according to claim 2 is characterized in that, the length of described measurement period is a week, and the length of described time period is one hour.
4. according to the described method of claim 1, it is characterized in that, the described step that order request data in the measurement period are handled comprises, first second of each time period in a time period order request data of each direct broadcast band add up respectively.
5. method according to claim 1 is characterized in that, the described step that the program request statistics is handled comprises:
Utilize this measurement period program request statistics before to form historical program request statistics;
The program request statistics of this measurement period is multiplied by one first weight coefficient, calculates first and analyze data;
Historical program request statistics is multiplied by one second weight coefficient, calculates second and analyze data; And
According to time corresponding section and corresponding direct broadcast band, described first, second analyzed the data addition, thereby obtain the program request prediction data of next measurement period.
6. method according to claim 5 is characterized in that, described historical program request statistics is that the program request statistics of measurement period of all or predetermined quantity before this measurement period is according to the mean value of measurement period number.
7. method according to claim 1 is characterized in that, the described step of utilizing the program request prediction data to form the program request data dispatching comprises:
The size of each bar data in the described program request prediction data according to prediction program request number sorted from big to small; And
Choose the data of predetermined quantity from big to small, preserve wherein corresponding direct broadcast band information and time period information, form described program request data dispatching.
8. method according to claim 1, it is characterized in that, when described network television system can only be when described Centroid carries out recorded broadcast to direct broadcast band, the described step that issues scheduler task according to the program request data dispatching is: Centroid record finish after, issue recorded broadcast content distributed tasks to described manager, so that the recorded broadcast content of corresponding channel in the corresponding time period that described manager will be recorded in this program request data dispatching is distributed to this specified node from described Centroid.
9. method according to claim 1, it is characterized in that, when all nodes of described network television system all can carry out recorded broadcast to direct broadcast band, the described step that issues scheduler task according to the program request data dispatching is: issue recorded broadcast task at this specified node to described manager, so that in the corresponding time period that described manager writes down, control the content that this specified node is recorded the corresponding direct broadcast band that writes down in this program request data dispatching in this program request data dispatching.
10. network television system that comprises content distributing network, described content distributing network comprises manager and a plurality of node, described a plurality of nodes comprise that one is used for all direct broadcast bands are recorded to form the Centroid of recorded broadcast content, it is characterized in that,
Described manager is equipped with database, is used for forming the order request data with the order program service request to the recorded broadcast content of the form recording user of data, comprises direct broadcast band information and service request time in every order request data at least,
Be provided with recorded broadcast content stores scheduler module in the described manager, this memory scheduling module comprises:
The program request statistic unit is used for the order request data in the measurement period are handled, and obtains the program request statistics of the video-on-demand times of each direct broadcast band in each time period;
The program request analytic unit is used for the program request statistics that obtains is handled the program request prediction data that obtains next measurement period, and utilizes this program request prediction data to form the program request data dispatching of next measurement period; And
Recorded broadcast content scheduling unit is used for issuing scheduler task according to described program request data dispatching to described manager, with the recorded broadcast content scheduling of respective live channel in the corresponding time period to specified node.
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| CN102195986A (en) * | 2011-05-19 | 2011-09-21 | 南京中兴新软件有限责任公司 | Method and device for processing data based on content distribution network |
| CN102291536A (en) * | 2011-08-31 | 2011-12-21 | 华南理工大学 | Network television automatic videotaping device driven based on user statistic data and method |
| CN102316362A (en) * | 2011-09-06 | 2012-01-11 | 中兴通讯股份有限公司 | Internet protocol television (IPTV) content scheduling method and apparatus thereof |
| CN101242432B (en) * | 2008-02-28 | 2012-03-28 | 蓝汛网络科技（北京）有限公司 | An Internet content distribution method, system and device |
| CN102867002A (en) * | 2011-07-05 | 2013-01-09 | 北大方正集团有限公司 | Method and device for processing electronic files |
| CN101668177B (en) * | 2009-09-24 | 2013-05-01 | 中兴通讯股份有限公司 | Multimedia content management method and device |
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| CN101668177B (en) * | 2009-09-24 | 2013-05-01 | 中兴通讯股份有限公司 | Multimedia content management method and device |
| CN102195986A (en) * | 2011-05-19 | 2011-09-21 | 南京中兴新软件有限责任公司 | Method and device for processing data based on content distribution network |
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| CN104871547A (en) * | 2012-10-25 | 2015-08-26 | 芬克数字电视指导有限责任公司 | Method and system for efficiently compiling media content items for a media-on-demand platform |
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| CN103024600B (en) * | 2012-12-12 | 2016-02-03 | 深圳都好看互动电视有限公司 | A kind of method, Apparatus and system of automatic generating video demand (telecommunication) service column |
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