CN101123602A - Content scheduling method based on network TV system - Google Patents
Content scheduling method based on network TV system Download PDFInfo
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Abstract
The invention discloses a content distribution method based on a network television system. The invention comprises a center media server (CMS) and an edge media server (EMS). The content distribution method is as follows: the adoption of the content distribution network (CDN) idea can promote the content of the center media server (CMS) to the edge media server (EMS), which makes network user rapidly obtain the needed content from a ''the latest and the best'' server, thus greatly improves video-on-demand speed of terminal user and reduces network load.
Description
Technical field
The present invention relates to a kind of content scheduling method, especially relate to a kind of content scheduling method of television system Network Based.
Background technology
At present, all there is the content scheduling method (the CDN scheme is as follows) of the television system Network Based (IPTV) of oneself in domestic and international many companies, but the notion when not having resident duration and network not busy mostly, and the mode that adopts burst to issue to file, this mode is for being fit in the little live broadcast system of unit time program map changes in demand, but for the more diversified program request of user's request, with the whole program file of hot broadcast according to certain policy distribution to edge media server (EMS), could really satisfy user's demand.Because live just play content is given the user, the user can not select fast forwarding and fast rewinding, and the user of program request is more frequent to the selection and the control requirement of program.
Summary of the invention
Purpose of the present invention just is to satisfy the needs of user's program request nearby, strengthens content intelligence proportioning, alleviates center media server pressure, the smooth expansion of the media server that support is used to distribute.Thereby provide a kind of content scheduling method of television system Network Based.
Purpose of the present invention can realize by following measure:
The present invention includes center media server (CMS) and edge media server (EMS), it is characterized in that: content scheduling method is as follows:
(1), obtains the tabulation (do_list) of going up non-existent content at edge media server (EMS) in center media server (CMS) existence; Obtain the contents list (ems_list_temp) of edge media server (EMS);
(2), obtain the program request amount V1 of the middle all the elements of tabulation (do_list) in the T time interval, program request amount V1 is gone up the number of times of user's program request by this edge media server (EMS), and according to the number of times descending sort of program request, remove the content of program request amount, generate sorted lists (cvod_list) less than the program request thresholding S that sets;
(3), will formulate and content that do not distribute to this edge media server (EMS) generates tabulation (toplist), and the video-on-demand times of putting this partial programme is Vt, Vt is much larger than V1, the content of (cvod_list) of will tabulating joins the afterbody of tabulation (toplist), the gross space needsize of content in the calculations list (toplist);
(4), obtain edge media server (EMS) and go up remanence disk space freesize;
(5) if the gross space needsize of the middle content of remanence disk space freesize＞=calculations list (toplist) adds distribution schedule creation to all the elements in the tabulation (cvod_list), the deletion plan is empty;
(6), if the gross space needsize of content in remanence disk space freesize＜calculations list (toplist), obtain the program request amount of these tabulation all the elements according to tabulation (ems_list_temp) in the T time interval, this program request amount is gone up the number of times of user's program request by edge media server (EMS), obtain the residence time of all the elements in the tabulation (ems_list_temp), remove the content of residence time less than the residence time of setting, and according to program request amount sorting by reversals, generate sorted lists (evod_list), calculate the gross space (delsize) of content in this tabulation;
(7), the content number that will distribute under calculating remanence disk space (freesize) can hold, and this part content elder generation adding distribution schedule creation, from tabulation (cvod_list), remove this part content then, generate tabulation (cvod_list_remnant);
(8), relatively the tabulation (cvod_list_remnant) with the tabulation (evod_list) video-on-demand times, obtain the contents list (send_list) that will distribute and the contents list (del_list) that will delete;
(9), the content in the tabulation (send_list) that will obtain at last joins in the distribution schedule creation, the content in will tabulate (del_list) joins deletion in the works;
(10), according to the situation of utilizing of network, beginning and ending time of distribution schedule creation is arranged on network when not busy, need consider according to the network application situation of various places when network is not busy, according to time started of distribution schedule creation content in the scheduling distribution schedule creation automatically;
(11), plan when being carried out by the intelligent distributing programs on the edge media server (EMS), the plan that surpasses the plan beginning and ending time will not be carried out, should preferentially carry out the deletion plan, distribution schedule creation is carried out in the back, download content from the preferential center media server (CMS) that configures earlier, if the network traffics on the preferential center media server (CMS) have surpassed the flow threshold values of configuration, then look for the distribution of carrying out content of a flow minimum from all center media server (CMS).
(3) middle video-on-demand times Vt representative value is 1000 or 1500 or 10000 among the present invention.Time period when network is not busy in (10) is 2 of every day ~ 8 points substantially.
The present invention is owing to adopt said system and method, thereby has following characteristics:
1. the present invention has considered the ageing of program, has introduced the notion of resident duration.
2. consider the operation situation of utilizing situation and system of network, introduced the notion of distribution when network is not busy.
3. strategy rationally basically can be with 90% user load to edge media server (EMS).
4. consider the spatial limitation of edge media server, can delete the content of low program request degree automatically, the reasonable use disk space.
5. can preferentially guarantee the manually execution of distribution of content.
6. maintenance is realized easily, is beneficial to the intelligent distribution technology of native system.(advantage)
Description of drawings
Accompanying drawing 1 be flow chart of the present invention (since figure bigger, one page can't hold, thus show with two page tables, and two pages of joining places are represented with A, B);
Accompanying drawing 2 is the flow charts that obtain the contents list (send_list) that will distribute and the contents list (del_list) that will delete among the present invention in (8).
Embodiment
The present invention does with detailed description below in conjunction with drawings and Examples:
Embodiment 1,
As shown in the figure, the present invention includes center media server (CMS) and edge media server (EMS), content scheduling method is as follows:
(1), obtains the tabulation (do_list) of going up non-existent content at edge media server (EMS) in center media server (CMS) existence; Obtain the contents list (ems_list_temp) of edge media server (EMS);
(2), obtain the program request amount V1 of the middle all the elements of tabulation (do_list) in the T time interval, program request amount V1 is gone up the number of times of user's program request by this edge media server (EMS), and according to the number of times descending sort of program request, remove the content of program request amount, generate sorted lists (cvod_list) less than the program request thresholding S that sets;
(3), will formulate and content that do not distribute to this edge media server (EMS) generates tabulation (toplist), and the video-on-demand times of putting this partial programme is Vt, Vt is much larger than V1, the content of (cvod_list) of will tabulating joins the afterbody of tabulation (toplist), the gross space needsize of content in the calculations list (toplist);
(4), obtain edge media server (EMS) and go up remanence disk space freesize;
(5) if the gross space needsize of the middle content of remanence disk space freesize＞=calculations list (toplist) adds distribution schedule creation to all the elements in the tabulation (cvod_list), the deletion plan is empty;
(6), if the gross space needsize of content in remanence disk space freesize＜calculations list (toplist), obtain the program request amount of these tabulation all the elements according to tabulation (ems_list_temp) in the T time interval, this program request amount is gone up the number of times of user's program request by edge media server (EMS), obtain the residence time of all the elements in the tabulation (ems_list_temp), remove the content of residence time less than the residence time of setting, and according to program request amount sorting by reversals, generate sorted lists (evod_list), calculate the gross space (delsize) of content in this tabulation;
(7), the content number that will distribute under calculating remanence disk space (freesize) can hold, and this part content elder generation adding distribution schedule creation, from tabulation (cvod_list), remove this part content then, generate tabulation (cvod_list_remnant);
(8), relatively the tabulation (cvod_list_remnant) with the tabulation (evod_list) video-on-demand times, obtain the contents list (send_list) that will distribute and the contents list (del_list) that will delete;
(9), the content in the tabulation (send_list) that will obtain at last joins in the distribution schedule creation, the content in will tabulate (del_list) joins deletion in the works;
(10), according to the situation of utilizing of network, beginning and ending time of distribution schedule creation is arranged on network when not busy, need consider according to the network application situation of various places when network is not busy, according to time started of distribution schedule creation content in the scheduling distribution schedule creation automatically;
(11), plan when being carried out by the intelligent distributing programs on the edge media server (EMS), the plan that surpasses the plan beginning and ending time will not be carried out, should preferentially carry out the deletion plan, distribution schedule creation is carried out in the back, download content from the preferential center media server (CMS) that configures earlier, if the network traffics on the preferential center media server (CMS) have surpassed the flow threshold values of configuration, then look for the distribution of carrying out content of a flow minimum from all center media server (CMS).
Embodiment 2,
Comprise center media server (CMS) and edge media server (EMS) among the present invention, content scheduling method is as follows:
(1), obtains the tabulation (do_list) of going up non-existent content at edge media server (EMS) in center media server (CMS) existence; Obtain the contents list (ems_list_temp) of edge media server (EMS);
(2), obtain the program request amount V1 of the middle all the elements of tabulation (do_list) in the T time interval, program request amount V1 is gone up the number of times of user's program request by this edge media server (EMS), and according to the number of times descending sort of program request, remove the content of program request amount, generate sorted lists (cvod_list) less than the program request thresholding S that sets;
(3), will formulate and content that do not distribute to this edge media server (EMS) generates tabulation (toplist), and the video-on-demand times of putting this partial programme is Vt, Vt is much larger than V1, the content of (cvod_list) of will tabulating joins the afterbody of tabulation (toplist), the gross space needsize of content in the calculations list (toplist);
(4), obtain edge media server (EMS) and go up remanence disk space freesize;
(5) if the gross space needsize of the middle content of remanence disk space freesize＞=calculations list (toplist) adds distribution schedule creation to all the elements in the tabulation (cvod_list), the deletion plan is empty;
(6), if the gross space needsize of content in remanence disk space freesize＜calculations list (toplist), obtain the program request amount of these tabulation all the elements according to tabulation (ems_list_temp) in the T time interval, this program request amount is gone up the number of times of user's program request by edge media server (EMS), obtain the residence time of all the elements in the tabulation (ems_list_temp), remove the content of residence time less than the residence time of setting, and according to program request amount sorting by reversals, generate sorted lists (evod_list), calculate the gross space (delsize) of content in this tabulation;
(7), the content number that will distribute under calculating remanence disk space (freesize) can hold, and this part content elder generation adding distribution schedule creation, from tabulation (cvod_list), remove this part content then, generate tabulation (cvod_list_remnant);
(8), relatively the tabulation (cvod_list_remnant) with the tabulation (evod_list) video-on-demand times, obtain the contents list (send_list) that will distribute and the contents list (del_list) that will delete;
(9), the content in the tabulation (send_list) that will obtain at last joins in the distribution schedule creation, the content in will tabulate (del_list) joins deletion in the works;
(10), according to the situation of utilizing of network, beginning and ending time of distribution schedule creation is arranged on network when not busy, need consider according to the network application situation of various places when network is not busy, according to time started of distribution schedule creation content in the scheduling distribution schedule creation automatically;
(11), plan when being carried out by the intelligent distributing programs on the edge media server (EMS), the plan that surpasses the plan beginning and ending time will not be carried out, should preferentially carry out the deletion plan, distribution schedule creation is carried out in the back, download content from the preferential center media server (CMS) that configures earlier, if the network traffics on the preferential center media server (CMS) have surpassed the flow threshold values of configuration, then look for the distribution of carrying out content of a flow minimum from all center media server (CMS).
Wherein (3) middle video-on-demand times Vt representative value is 1000 or 1500 or 10000.
Embodiment 3,
Comprise center media server (CMS) and edge media server (EMS) among the present invention, content scheduling method is as follows:
(1), obtains the tabulation (do_list) of going up non-existent content at edge media server (EMS) in center media server (CMS) existence; Obtain the contents list (ems_list_temp) of edge media server (EMS);
(2), obtain the program request amount V1 of the middle all the elements of tabulation (do_list) in the T time interval, program request amount V1 is gone up the number of times of user's program request by this edge media server (EMS), and according to the number of times descending sort of program request, remove the content of program request amount, generate sorted lists (cvod_list) less than the program request thresholding S that sets;
(3), will formulate and content that do not distribute to this edge media server (EMS) generates tabulation (toplist), and the video-on-demand times of putting this partial programme is Vt, Vt is much larger than V1, the content of (cvod_list) of will tabulating joins the afterbody of tabulation (toplist), the gross space needsize of content in the calculations list (toplist);
(4), obtain edge media server (EMS) and go up remanence disk space freesize;
(5) if the gross space needsize of the middle content of remanence disk space freesize＞=calculations list (toplist) adds distribution schedule creation to all the elements in the tabulation (cvod_list), the deletion plan is empty;
(6), if the gross space needsize of content in remanence disk space freesize＜calculations list (toplist), obtain the program request amount of these tabulation all the elements according to tabulation (ems_list_temp) in the T time interval, this program request amount is gone up the number of times of user's program request by edge media server (EMS), obtain the residence time of all the elements in the tabulation (ems_list_temp), remove the content of residence time less than the residence time of setting, and according to program request amount sorting by reversals, generate sorted lists (evod_list), calculate the gross space (delsize) of content in this tabulation;
(7), the content number that will distribute under calculating remanence disk space (freesize) can hold, and this part content elder generation adding distribution schedule creation, from tabulation (cvod_list), remove this part content then, generate tabulation (cvod_list_remnant);
(8), relatively the tabulation (cvod_list_remnant) with the tabulation (evod_list) video-on-demand times, obtain the contents list (send_list) that will distribute and the contents list (del_list) that will delete;
(9), the content in the tabulation (send_list) that will obtain at last joins in the distribution schedule creation, the content in will tabulate (del_list) joins deletion in the works;
(10), according to the situation of utilizing of network, beginning and ending time of distribution schedule creation is arranged on network when not busy, need consider according to the network application situation of various places when network is not busy, according to time started of distribution schedule creation content in the scheduling distribution schedule creation automatically;
(11), plan when being carried out by the intelligent distributing programs on the edge media server (EMS), the plan that surpasses the plan beginning and ending time will not be carried out, should preferentially carry out the deletion plan, distribution schedule creation is carried out in the back, download content from the preferential center media server (CMS) that configures earlier, if the network traffics on the preferential center media server (CMS) have surpassed the flow threshold values of configuration, then look for the distribution of carrying out content of a flow minimum from all center media server (CMS).
Time period when network is not busy in (10) is 2 of every day ~ 8 points substantially, can be 2,3,4,5,6,7,8 etc., also can be 9,10 or arrive morning etc. at midnight 23.
Embodiment 4
The present invention is based on the content scheduling method of Web TV (IPTV is as follows) system, it is a kind of content distribution techniques, (Content Distribution Network is a content distributing network to have adopted CDN, as follows) theory of technology, can push content to network edge, make the network user can be from the server of " best recently " fast program request to required content, thereby improve terminal use's program request speed greatly, alleviate offered load.
The design principle of content scheduling method:
Be located in the CDN network, N edge media server (Edge Media Server is called for short EMS) arranged, be respectively EMS1, EMS2 ... EMSN has N (i) on each edge media server, i=1 ... n content, and all inequality.M center media server (Central Media Server is called for short CMS) arranged, be respectively CMS1, CMS2 ... CMSM has M (i) on each center media server, i=1 ... m content, and content is identical.
For each the content C on each CMS, in this content T life cycle, have only when its program request degree VD satisfies certain threshold condition and just distribute so.Below gone through the strategy based on the content scheduling of IPTV system of our company.
Operation flow:
For the program request needs that satisfy the user, alleviate offered load, the content on the center media server (CMS) need be distributed to edge media server (EMS).Because crowd's difference of each EMS correspondence is also different to the program request degree of content,, will be distributed to EMS from CMS above the content of program request thresholding so need set the program request thresholding for each EMS.If the shared space of content of distribution has surpassed the remaining space of EMS, then to finish the distribution of content from the low content of EMS deletion program request degree.
The configuration of CMS/EMS:
The configuration of CMS correspondence: the username and password of used FTP, the username and password of content data base when the type of the title of server, the address of server, server, distribution.
The configuration of EMS correspondence: the flow threshold values of the IP of the username and password of the username and password of used FTP, content data base, preferential CMS, preferential CMS when the type of the title of server, the address of server, server, distribution time started, distribution concluding time, video-on-demand times difference, distribution.
The initialization of the last content of EMS:
Before EMS reaches the standard grade, need partial content to be initialised on the EMS, this way is to make intelligent distribution can enter stable state rapidly, the program that can will distribute when initial does not influence program request too much.
Implementation method:
Explanation
The definition of VD is the program request amount of content C1 in time interval T.
The resident duration of setting content C1 is L, and the definition of L is the minimum life cycle of content, and interior during this period this content does not allow deleted.
The relative program request threshold value of setting a certain EMSi is S, and the definition of S is the relative program request amount critical value that judges whether distributing contents.
If to the content C1 on the CMS (C1 does not exist on EMSi), its (the meter user repeats video-on-demand times) of V1 user's program request is arranged in time interval T, this moment, the program request degree VD of content C1 was VD=V1.When V1 greater than zero the time, show that content C1 has user's program request, and, show that further content C1 pouplarity is very big, so can it be distributed on the server of a broadcasting user " best recently " in advance as V1 during greater than M.
This tactful requirement can be got the user program request amount V1 of CMS in time interval T.So in the time of V1＞S, just C1 is distributed; During V1＜=S, then C1 is not distributed.
After distribution schedule creation is formulated, do not satisfy full content distribution in the distribution schedule creation, then need to guarantee carrying out automatically of content distribution according to program request amount V1 and resident duration L deletion content if EMSi goes up remaining space.
In addition, the order in (4) step can be placed on (1), and (2), (3), arbitrary step carries out in (4) step; It is consistent that (5) step and (6), (7), (8), (9) step are incorporated into the function of finishing together.
Claims (3)
1. the content scheduling method of a television system Network Based, it comprises center media server (CMS) and edge media server (EMS), it is characterized in that: content scheduling method is as follows:
(1), obtains the tabulation (do_list) of going up non-existent content at edge media server (EMS) in center media server (CMS) existence; Obtain the contents list (ems_list_temp) of edge media server (EMS);
(2), obtain the program request amount V1 of the middle all the elements of tabulation (do_list) in the T time interval, program request amount V1 is gone up the number of times of user's program request by this edge media server (EMS), and according to the number of times descending sort of program request, remove the content of program request amount, generate sorted lists (cvod_list) less than the program request thresholding S that sets;
(3), will formulate and content that do not distribute to this edge media server (EMS) generates tabulation (toplist), and the video-on-demand times of putting this partial programme is Vt, Vt is much larger than V1, the content of (cvod_list) of will tabulating joins the afterbody of tabulation (toplist), the gross space needsize of content in the calculations list (toplist);
(4), obtain edge media server (EMS) and go up remanence disk space freesize;
(5) if the gross space needsize of the middle content of remanence disk space freesize＞=calculations list (toplist) adds distribution schedule creation to all the elements in the tabulation (cvod_list), the deletion plan is empty;
(6), if the gross space needsize of content in remanence disk space freesize＜calculations list (toplist), obtain the program request amount of these tabulation all the elements according to tabulation (ems_list_temp) in the T time interval, this program request amount is gone up the number of times of user's program request by edge media server (EMS), obtain the residence time of all the elements in the tabulation (ems_list_temp), remove the content of residence time less than the residence time of setting, and according to program request amount sorting by reversals, generate sorted lists (evod_list), calculate the gross space (delsize) of content in this tabulation;
(7), the content number that will distribute under calculating remanence disk space (freesize) can hold, and this part content elder generation adding distribution schedule creation, from tabulation (cvod_list), remove this part content then, generate tabulation (cvod_list_remnant);
(8), relatively the tabulation (cvod_list_remnant) with the tabulation (evod_list) video-on-demand times, obtain the contents list (send_list) that will distribute and the contents list (del_list) that will delete;
(9), the content in the tabulation (send_list) that will obtain at last joins in the distribution schedule creation, the content in will tabulate (del_list) joins deletion in the works;
(10), according to the situation of utilizing of network, beginning and ending time of distribution schedule creation is arranged on network when not busy, need consider according to the network application situation of various places when network is not busy, according to time started of distribution schedule creation content in the scheduling distribution schedule creation automatically;
(11), plan when being carried out by the intelligent distributing programs on the edge media server (EMS), the plan that surpasses the plan beginning and ending time will not be carried out, should preferentially carry out the deletion plan, distribution schedule creation is carried out in the back, download content from the preferential center media server (CMS) that configures earlier, if the network traffics on the preferential center media server (CMS) have surpassed the flow threshold values of configuration, then look for the distribution of carrying out content of a flow minimum from all center media server (CMS).
2. the content scheduling method of television system Network Based according to claim 1 is characterized in that: video-on-demand times Vt representative value is 1000 or 1500 or 10000 in described (3).
3. the content scheduling method of television system Network Based according to claim 1 and 2 is characterized in that: the time period when network is not busy in described (10) is 2 of every day ~ 8 points substantially.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN102891869A (en) * | 2011-07-20 | 2013-01-23 | 郑州威科姆科技股份有限公司 | CDN (Content Delivery Network) and content distribution and scheduling method |
| CN101668177B (en) * | 2009-09-24 | 2013-05-01 | 中兴通讯股份有限公司 | Multimedia content management method and device |
| CN104992698A (en) * | 2015-07-15 | 2015-10-21 | 张阳 | Song on-demand arrangement method and device for KTV song-on-demand system |
-
2006
- 2006-08-11 CN CNA2006100485987A patent/CN101123602A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102891869A (en) * | 2011-07-20 | 2013-01-23 | 郑州威科姆科技股份有限公司 | CDN (Content Delivery Network) and content distribution and scheduling method |
| CN102891869B (en) * | 2011-07-20 | 2015-07-15 | 郑州威科姆科技股份有限公司 | CDN (Content Delivery Network) and content distribution and scheduling 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 |
| CN104992698A (en) * | 2015-07-15 | 2015-10-21 | 张阳 | Song on-demand arrangement method and device for KTV song-on-demand system |
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