CN102231849B - Digital television video on demand system and on demand method - Google Patents
Digital television video on demand system and on demand method Download PDFInfo
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Abstract
The invention discloses a digital television video on demand system, which comprises a video server, a cable modem terminal system (CMTS), a Cable Modem and an interactive digital set-top box. A policy server and an on-demand bandwidth management server are sequentially connected between the CMTS and the video server, wherein the policy server is used for judging whether a current network permits the addition of new user access or not and performing priority judgment; and the on-demand bandwidth management server converts a user traffic request into a packet cable multimedia (PCMM) standard protocol recognizable for both the policy server and the CMTS, returns a session creation request message to the video server to confirm whether an on demand request is transmitted or not. Compared with currently adopted schemes, a system topological structure diagram can avoid network congestion caused by the simultaneous downlink transmission of a plurality of pieces of user data traffic generated by an overgreat number of on demand users at prime time and effectively solve the problem of CMTS congestion by the intelligent selection of the policy server to make the system run stably and reliably.
Description
Technical field
The invention belongs to digital TV field, be specifically related to a kind of digital TV video frequency VOD system and order method.
Background technology
Along with popularizing of Digital Television, for meeting the individual demand of people to TV programme, each television operator has been released video on-demand system, the program that can make user be in and oneself like according to the hobby trick play of oneself, and this business obtains users' welcome.
Currently used video on-demand system topological structure as shown in Figure 1, at video server end, be connected with CMTS(Cable Modem Terminal Systems, cable modem end welding system), CMTS and Cable Modem(cable modem) be connected, Cable Modem (CM, cable modem) is connected to each user's Set Top Box and carries out video request program use.User sends after order request by Set Top Box, via Cable Modem, by CMTS up link, to CMTS, send request, CMTS forwards this information to video server, video server sends request corresponding video information to the Set Top Box of request program request, CMTS is by setting up transmission channel between selected downlink transfer frequency and Cable Modem, video data is transferred to the user side of the corresponding request of sending through modulation and demodulation, user watches the program of program request.
Adopt this topological structure, can complete preferably video request program, but, along with increasing of digital cable customers, the bandwidth of the down link of each CMTS is limited, in program request peak period, when too much user sends video on-demand request, CMTS down link there will be network congestion, and the program that affects all users that this CMTS connects normally watches, the reliability of system operation declines.
Summary of the invention
The object of the present invention is to provide a kind of digital television on-demand system and method for effective solution network congestion, with the reliability of raising system operation.
A kind of digital TV video frequency VOD system, comprise for broadcasting the video server of video, for record program request solicited message allocation of downlink by data modem with the CMTS at Coaxial Cables, be connected with CMTS and data carried out to Cable Modem and the interactive digital Set Top Box of modulation /demodulation, interactive digital set-top box users end sends after video on-demand request by Cable Modem, by CMTS, forward order request information, video data is watched by user side Set Top Box to Cable Modem demodulation by CMTS downlink transmission, between CMTS and video server, be also connected with strategic server and bandwidth on-demand management server in turn, strategic server is for judging whether current network allows to increase new user's access and priority and judge, bandwidth on-demand management server is converted into strategic server and the discernible PCMM(PacketCable MultiMedia of CMTS by customer flow request, PacketCable multimedia) standard agreement, and creation session request results is back to video server.Preferably, this system also comprises the management platform being connected with strategic server, for collocation strategy server.
A digital TV video frequency order method, comprises the steps: 1) video server reception order request, to bandwidth on-demand management server, initiate to create bandwidth session request; 2) bandwidth on-demand management server carries out protocol conversion by bandwidth demand, and customer flow need to be converted into strategic server and the discernible PCMM standard agreement of CMTS, is forwarded to strategic server, and is forwarded to CMTS by strategic server; 3) whether CMTS has enough resources to use according to channel occupancy and threshold decision, more how to respond according to configured strategy judgement, if resource meets, turns to step 4), if do not meet, has just turned to step 6); 4) CMTS and Cable Modem complete the application of Internet resources and reserve, and return and distribute confirmation to strategic server, and strategic server sends distribution confirmation to bandwidth on-demand management server, and the on-demand session number of CMTS is added to 1; 5) bandwidth on-demand management server will send to video server after the conversion of creation conversation request message after receiving and distributing confirmation, transmits video information be sent to user through CMTS by video server; 6) CMTS returns to the message code of single channel inadequate resource, by tactical management server, bandwidth on-demand management server, successively feed back to video broadcasting server, video broadcasting server is received the request of the rear refusal of this feedback user program request, descriptive information is sent to user through CMTS simultaneously, to completely next request of passage of bandwidth resources, CMTS will make collocation strategy operation.
Preferably, in described step 6), after CMTS single channel inadequate resource, CMTS can provide multiple strategy to be configured operation for next request of this passage to comprise: a, force to increase service traffics; B, refuse new order request; C, Business Stream cynamic channel is switched to the down going channel of another frequency of CMTS.
Adopt digital TV video frequency VOD system of the present invention and method, on existing VOD system basis, newly-increased strategic server and the bandwidth on-demand management server of being added with, by bandwidth on-demand management server, different agreement request is converted into strategic server and the discernible instruction of CMTS, by strategic server according to request type and the network resource status of CMTS, decision provides service to which user, which user or which application can obtain bandwidth priority and when can obtain the policing actions such as bandwidth priority, simultaneously can decide the whether follow-up safeguard such as dilatation of network according to CMTS resource situation, this system topology figure compares with currently used scheme, in the time of can avoiding a plurality of user data traffics transmission downwards simultaneously that rating peak period produces when too much because of program request number of users, there is network congestion, the present invention is by the intelligent selection of strategic server, the congested problem of CMTS that can effectively solve, system stability is moved reliably.
Accompanying drawing explanation
Fig. 1 is existing digital television on-demand system topology schematic diagram.
Fig. 2 is digital television on-demand system topology schematic diagram of the present invention.
Fig. 3 is digital television on-demand method flow block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As Fig. 2, a kind of digital TV video frequency VOD system, comprise for broadcasting the video server of video, for record program request solicited message allocation of downlink by data modem with the CMTS at Coaxial Cables, be connected with CMTS and data carried out to Cable Modem and the interactive digital Set Top Box of modulation /demodulation, interactive digital set-top box users end sends after video on-demand request by Cable Modem, by CMTS, forward order request information, and video data is watched by user side Set Top Box to Cable Modem demodulation by CMTS downlink transmission, between CMTS and video server, be also connected with strategic server and bandwidth on-demand management server in turn, strategic server is for judging whether current network allows to increase new user's access and priority and judge, bandwidth on-demand management server is converted into strategic server and the discernible PCMM standard agreement of CMTS by customer flow requirement request, and creation session request results is back to video server.
Native system is on existing VOD system basis, newly-increased strategic server and the bandwidth on-demand management server of being added with, by bandwidth on-demand management server, different agreement request is converted into strategic server and the discernible instruction of CMTS, by strategic server according to request type and the network resource status of CMTS, decision provides service to which user, which user or which application can obtain bandwidth priority and when can obtain the policing actions such as bandwidth priority, simultaneously can decide the whether follow-up safeguard such as dilatation of network according to CMTS resource situation, this system topology figure compares with currently used scheme, in the time of can avoiding a plurality of user data traffics transmission downwards simultaneously that rating peak period produces when too much because of number of users, there is network congestion, the present invention is by the intelligent selection of strategic server, the congested problem of CMTS effectively solving, system stability is moved reliably.
For better managing native system, the management platform being connected is also installed, for collocation strategy server with strategic server in this system.Along with increasing of digital cable customers, may need to configure more CMTS, to meet the bandwidth requirement of user's downlink data flow.Now, only need to corresponding CMTS, do corresponding configuration in this management platform, can complete the expansion to system, be convenient to staff and manage operation.
Digital TV video frequency order method of the present invention, comprises the steps: 1) video server reception order request, to bandwidth on-demand management server, initiate to create bandwidth session request; 2) bandwidth on-demand management server carries out protocol conversion by bandwidth demand, and customer flow need to be converted into strategic server and the discernible PCMM standard agreement of CMTS, is forwarded to strategic server, and is forwarded to CMTS by strategic server; 3) CMTS, according to channel occupancy and threshold decision request response request whether, if response turns to step 4), if do not respond, has just turned to step 6); 4) CMTS and Cable Modem complete the application of Internet resources and reserve, and return and distribute confirmation to strategic server, and strategic server sends distribution confirmation to bandwidth on-demand management server, and the on-demand session number of CMTS is added to 1; 5) bandwidth on-demand management server sends to video server by creation conversation request message after receiving and distributing confirmation, transmits video information be sent to user through CMTS by video server; 6) CMTS returns to the message code of single channel inadequate resource, by tactical management server, bandwidth on-demand management server, successively feed back to video broadcasting server, video broadcasting server is received the request of the rear refusal of this feedback user program request, descriptive information is sent to user through CMTS, next the request CMTS that bandwidth resources has been expired to passage will make collocation strategy operation simultaneously.
In step 6), in described step 6), after MTS single channel inadequate resource, CMTS can provide multiple strategy to be configured operation for next request of this passage to comprise: a, force to increase service traffics; B, refuse new order request; C, Business Stream cynamic channel is switched to the down going channel of another frequency of CMTS.For a) operation, may cause VOD system certain congestedly, but it can implement in certain allowed band.For b) operation, can well guarantee existing user's normal use, newly-increased user is sent to wait instruction, inform that present network is unavailable, after wait network recovery, try again.For c) operation, when having the down going channel of the available free frequency of CMTS, by switching to the down going channel of another frequency of CMTS, both guaranteed that current user normally watched, also can make full use of resource, meet the normal of new requested service and meet.
The technical scheme above embodiment of the present invention being provided is described in detail, applied specific case herein the principle of the embodiment of the present invention and execution mode are set forth, the explanation of above embodiment is only applicable to help to understand the principle of the embodiment of the present invention; , for one of ordinary skill in the art, according to the embodiment of the present invention, in embodiment and range of application, all will change, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (4)
1. a digital TV video frequency VOD system, comprise for broadcasting the video server of video, for record program request solicited message allocation of downlink by data modem with the CMTS at Coaxial Cables, be connected with CMTS and data carried out to Cable Modem and the interactive digital Set Top Box of modulation /demodulation, interactive digital set-top box users end sends after video on-demand request by Cable Modem, by CMTS, forward order request information, video data is watched by user side Set Top Box to Cable Modem demodulation by CMTS downlink transmission, it is characterized in that, between CMTS and video server, be also connected with strategic server and bandwidth on-demand management server in turn, strategic server is for judging whether current network allows to increase new user's access and priority and judge, bandwidth on-demand management server is converted into strategic server and the discernible PCMM standard agreement of CMTS by customer flow demand, and creation session request results is back to video server.
2. digital TV video frequency VOD system according to claim 1, is characterized in that, this system also comprises the management platform being connected with strategic server, for collocation strategy server.
3. a digital TV video frequency order method, comprises the steps: 1) video server reception order request, to bandwidth on-demand management server, initiate to create bandwidth session request; 2) bandwidth on-demand management server carries out protocol conversion by bandwidth demand, and customer flow need to be converted into strategic server and the discernible PCMM standard agreement of CMTS, is forwarded to strategic server, and is forwarded to CMTS by strategic server; 3) whether CMTS has enough resources to use according to channel occupancy and threshold decision, more how to respond according to configured strategy judgement, if resource meets, turns to step 4), if do not meet, has just turned to step 6); 4) CMTS and Cable Modem complete the application of Internet resources and reserve, and return and distribute confirmation to strategic server, and strategic server sends distribution confirmation to bandwidth on-demand management server, and the on-demand session number of CMTS is added to 1; 5) bandwidth on-demand management server will send to video server after the conversion of creation conversation request message after receiving and distributing confirmation, transmits video information be sent to user through CMTS by video server; 6) CMTS returns to the message code of single channel inadequate resource, by tactical management server, bandwidth on-demand management server, successively feed back to video broadcasting server, video broadcasting server is received the request of the rear refusal of this feedback user program request, descriptive information is sent to user through CMTS, next the request CMTS that bandwidth resources has been expired to passage will make collocation strategy operation simultaneously.
4. digital TV video frequency order method according to claim 3, it is characterized in that, in described step 6), after CMTS single channel inadequate resource, CMTS can provide multiple strategy to be configured operation for next request of this passage to comprise: a, force to increase service traffics; B, refuse new order request; C, Business Stream cynamic channel is switched to the down going channel of another frequency of CMTS.
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| CN104079956B (en) * | 2013-03-28 | 2017-07-14 | 日电（中国）有限公司 | User terminal access control method and access control equipment |
| CN103237270A (en) * | 2013-05-09 | 2013-08-07 | 黄孙明 | Video streaming media system and method capable of interacting with network |
| WO2015085566A1 (en) * | 2013-12-13 | 2015-06-18 | 华为技术有限公司 | Resource allocation method, device and system |
| CN104080181A (en) * | 2014-06-27 | 2014-10-01 | 华为技术有限公司 | Method and device for controlling bandwidth on demand service |
| CN105208452A (en) * | 2015-09-24 | 2015-12-30 | 天脉聚源（北京）科技有限公司 | Interactive load configuration method and device for television interactive system |
| CN105430529A (en) * | 2015-11-26 | 2016-03-23 | 航天恒星科技有限公司 | Video data transmission method and system |
| CN108012194B (en) * | 2016-11-02 | 2021-11-05 | 中兴通讯股份有限公司 | Method, device and system for controlling IPTV video on demand |
| CN110990699B (en) | 2019-11-29 | 2021-12-07 | 广州市百果园信息技术有限公司 | Information pushing system, method, device, equipment and storage medium |
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Address after: 510010, No. 233 middle ring road, Guangzhou, Guangdong, Yuexiu District Patentee after: Guangzhou Zhujiang digital group Limited by Share Ltd Address before: 510010, No. 233 middle ring road, Guangzhou, Guangdong, Yuexiu District Patentee before: Guangzhou Zhujiang Digital Group Co., Ltd. |
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Denomination of invention: Digital television video on demand system and on demand method Effective date of registration: 20171229 Granted publication date: 20140416 Pledgee: China Co truction Bank Corp Guangzhou Yuexiu branch Pledgor: Guangzhou Zhujiang digital group Limited by Share Ltd Registration number: 2017440000218 |
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