CN101207532A - Method for network building of distributed IPTV system and business implementation method - Google Patents
Method for network building of distributed IPTV system and business implementation method Download PDFInfo
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Abstract
The invention discloses a network organizing method for a distributed IPTV system, as well as the service realizing method thereof. The network organizing method firstly provides a first-hierarchy node, which provides global operation support as well as global service application management for the whole system; the network organizing method also provides a plurality of second-hierarchy nodes which are connected with the first-hierarchy node through a backbone network, and the second-hierarchy nodes receive and obtain the global service information from the first-hierarchy node, and report customer use information to the first-hierarchy node; then a plurality of third-hierarchy nodes are arranged below each second-hierarchy node, and the third-hierarchy nodes are connected with the second-hierarchy nodes through a backbone network, and are connected with a set top box through an access network. The service realizing method is realized through utilizing the network organizing method. Using the method of the invention can reduce the load pressure of the IPTV system backbone network, and improve the response speed of the user request.
Description
Technical field
The present invention relates to the network-building method and the service implementation method of a kind of IPTV (Internet Protocol Television) system, especially relate to and a kind ofly can save network-building method and the service implementation method that backbone bandwidth reduces the distributed IPTV system of backbone network load pressure.
Background technology
Along with the development of broadband network, various business based on wideband transmit also present developing state fast, especially the digitized processing of miscellaneous service.Continuing to optimize of particularly TV programme digitlization, audio frequency and video compression algorithm makes that transmission becomes possibility based on broadband network for TV programme, audio frequency and video, and the IPTV system also arises at the historic moment.The living in of people becomes and become increasingly abundant colorfully cybertimes, and various demands also constantly increase, and the requirement of service quality is also improved constantly.As: game on line, visual telephone, note, surfing on the net etc., but people play the timing that each TV station has no longer been satisfied in the requirement of TV programme, but need watch various programs at any time, television picture quality, visual telephone image quality and voice quality are required also to improve constantly.This has higher requirement to traditional IPTV systematic networking method and service implementation method, and traditional systematic networking method and service implementation method generally all are that net distribution is partly carried out distributed design, and getting this only is to have solved subproblem.For the increase of class of business, traffic carrying capacity and number of users, backbone network is born the pressure of load also can be increasing, and the service rate that the user enjoys also can be affected.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of network-building method and service implementation method of distributed IPTV system, this network-building method and service implementation method can not only be saved backbone bandwidth and be reduced the backbone network load pressure, can also improve system to user's request responding speed.
For solving the problems of the technologies described above, the network-building method of distributed IPTV system of the present invention is
(1) entire I PTV system is divided into three level nodes;
(2) provide one one level node, for whole system provides overall operation support and the management of overall service application;
(2) under a level node, provide a plurality of two level nodes, link to each other with a described level node, receive the business information of obtaining overall situation issue, and use information to a described level node report of user from a described level node by backbone network;
(3) under each two level node, a plurality of three level nodes are provided again, link to each other with described two level nodes by backbone network, and be connected with set-top box by Access Network, be used for inlet as the set-top box connecting system, by obtain the information that Business Processing needs from described two level nodes, directly for the user provides IPTV service, and to the described second level node feedback processing information.
Further, also carry out following operation in the Management Layer in described first level node and two level nodes:
Carry out the plateform system management, promptly node that system has jurisdiction over is managed the relevant information of each network element in the generation system;
Carry out CP/SP and user management, promptly CP/SP and user profile are managed, handle the CAMEL-Subscription-Information of CP/SP, user's subscription and unsubscription information is revised CP/SP and user profile etc.;
Finish Certificate Authority, promptly authentication is carried out in user's miscellaneous service request, avoid disabled user's connecting system platform, use illegal professional;
Carry out set-top box management, i.e. managing I PTV platform all set-top box information of being served;
Carry out digital copyright management, promptly the streaming medium content of issuing on the IPTV platform is encrypted, avoid streaming medium content stolen;
Carry out following operation in the service application layer in described first level node and two level nodes:
Carry out contents processing, promptly the media content that is submitted to the IPTV platform is handled;
Carry out Content Management, promptly media content is managed;
Carry out the content distribution, the bearer network interface promptly is provided, media content rationally is distributed in just in the IPTV system;
The user provides electronic program list, even can carry out the selection of media content and miscellaneous service by set-top box;
Carry out Streaming Media broadcasting, promptly the Streaming Media broadcast request of set-top box is handled;
Carry out streaming media on demand, promptly the streaming media on demand request of set-top box is handled;
Further, in a described level node and two level node Management Layers, also carry out following operation:
Carry out statistical analysis, promptly to the customer consumption custom, the information such as pouplarity of each CP/SP content are added up, and generate satisfactory form content;
Carry out the authentication and accounting interface management, charging authentication interface function promptly externally is provided, provide different interface adaptive at different external function modules;
Charge and pay and clearing, promptly finish the clearing of customer service usage charges, and withhold accordingly.
Further again, in a described level node and two level node traffic application layers, also carry out following operation:
Carry out streaming media service, be set-top box the streaming medium content service is provided;
Carry out the value-added service application management, i.e. the various value-added services that provide of managing I PTV system.
Further again, in a described level node and two level node traffic application layers, also carry out following operation:
Communicate service, promptly provide visual telephone service the user;
Interactive game is provided, promptly provides the interactive game business the user;
Information service is provided, promptly provides point-to-point short message service the user.
Further again, in described three level nodes, carry out following operation:
Carry out the content distribution, be about to media content and rationally be distributed in just in the IPTV system;
The user provides electronic program list, even can carry out the selection of media content and miscellaneous service by set-top box;
Carry out Streaming Media broadcasting, promptly the Streaming Media broadcast request of set-top box is handled;
Carry out streaming media on demand, promptly the streaming media on demand request of set-top box is handled;
Carry out streaming media service, be set-top box the streaming medium content service is provided;
Further, in described three level nodes, can also carry out following operation:
Carry out the value-added service application management, i.e. the various value-added services that provide of managing I PTV system;
Communication service is provided, promptly provides visual telephone service the user;
Interactive game is provided, promptly provides the interactive game business the user;
Information service is provided, promptly provides point-to-point short message service the user.
Distributed IPTV service implementation method of the present invention may further comprise the steps:
The user sends service request by three level nodes to two level nodes;
Two level nodes carry out authentication to user's request content,
If two level nodes can authentication, then return authenticating result to three level nodes, if three level nodes possess the business tine of user's request, then provide professional to user side by three level nodes; If three level nodes do not possess the business tine of user request, then obtain business to two level nodes, two level nodes are this business tine not also, then obtains business to a level node;
If two level nodes can not authentication, then send authentication request to a level node, return authenticating result by a level node to two level nodes and then to three level nodes, if can authentication, three level nodes provide professional according to authenticating result to user's request, if can not authentication, then return the unsuccessful information of authentication to user side by three level nodes.
Because the structure that the present invention has adopted a level node and two level nodes to comprise Management Layer and service application layer is carried out networking, make the second level node bear the business and the function of the first level node under many circumstances, bandwidth as a level node of backbone network can obtain saving greatly like this, has also alleviated the load pressure of backbone network; One level node and two level nodes all have subscriber management function and Certificate Authority function, so only when not having user profile, two level nodes just need ask a level node, take the bandwidth of backbone network, so also reduced the load pressure of backbone network, when if two level nodes have user profile, the user can meet with a response from two level nodes soon, thereby has also improved user's request responding speed; Equally, one, two, three levels all have the content distribution function, when the needed content of user in the time on three nearest level nodes of user, can extracting, do not need to take a level node and two level meshed network bandwidth, if three level nodes can not extract required content and just extract to two level nodes,, extract to a level node request again if two level nodes still do not have, can reduce the backbone network load pressure so too, improve user's request responding speed.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and the specific embodiments:
Fig. 1 is the deployment architecture figure of distributed IPTV system of the present invention;
Fig. 2 is a level node two level node composition diagrams;
Fig. 3 is three level node composition diagrams;
Fig. 4 is program request under the distributed deployment/live broadcast service flow process;
Fig. 5 is a Communications service operation flow under the distributed deployment;
Fig. 6 is an interactive game operation flow under the distributed deployment;
Fig. 7 is the professional flow process of information service under the distributed deployment.
Embodiment
Fig. 1 is the deployment architecture figure of distributed IPTV system of the present invention, and whole system is linked together by backbone network, is connected with set-top box by Access Network.System is divided into three layers, and a level node only has one, comprises business support layer and service application layer.Also can be described as business support module and business application module, these two modules are positioned at a level node, are the Centroids of entire I PTV system, and operation support functions such as authenticating and charging, statistical analysis, user management are provided for whole system.And service application function such as Content Management, content distribution, electric program menu, streaming media service.Two level nodes adopt core backbone to be connected with a level node, pass through core backbone, two level nodes obtain the media content of overall situation issue from a level node, obtain CP/SP information and user profile etc., two level nodes are also to a level node report of user service recorder, authenticating and charging request etc.Under the situation that business information possesses, two level nodes can be independently in institute's compass of competency the user IPTV is provided business, do not need participating in of a level node.One level node is consistent with two level node structures.The module that wherein comprises as shown in Figure 2.One level node and two level nodes comprise as lower module:
1 authentication and accounting interface management module: this module externally provides charging authentication interface function, provides different interface adaptive at different external function modules.
2CP/SP and user management module: this module is used for CP/SP and user profile are managed, and handles the CAMEL-Subscription-Information of CP/SP, and user's subscription and unsubscription information is revised CP/SP and user profile etc.
3 Certificate Authority modules: this module is carried out authentication to user's miscellaneous service request, avoids disabled user's connecting system platform, uses illegal professional.
4 charge pays and settlement module: this module is used to finish the clearing of customer service usage charges, and withholds accordingly.
5 statistical analysis modules: this module is used for the customer consumption custom, and the information such as pouplarity of each CP/SP content are added up, and generate satisfactory form content.
6 set-top box administration modules: this module is used for all set-top box information that managing I PTV platform is served, for example: information such as user name, password, authority.
7 digital rights management module: this module is used for the streaming medium content of issuing on the IPTV platform is encrypted, and avoids streaming medium content stolen.
8 plateform system administration modules: this module is used for whole system is managed, the relevant information of each network element module in the generation system, and for example: the CPU of network element takies situation, internal memory utilizes situation etc.
9 content processing module: this module is used for the media content that is submitted to the IPTV platform is handled, and carries out coding of specified format etc. as: media formats inspection, to media content.
10 content managing modules: this module is used for media content is managed, and comprising: search, deletion, copy etc.
11 broadcasting modules: this module is used for the streaming media on demand request of set-top box module is handled.
12 broadcast module: this module is used for the Streaming Media broadcast request of set-top box module is handled.
13 streaming media service modules: this module is used to the set-top box module that the streaming medium content service is provided.
14 content distribution modules: this module is used for and the bearer network interface, and media content rationally is distributed in just in the IPTV system.
15 value-added service application management modules: this module is used for the various value-added services that managing I PTV system provides, for example: the enabling of miscellaneous service, stop, issue etc.
16 communication service modules: this module is used for system provides visual telephone service to the user.
17 interactive game modules: this module is used for system provides the interactive game business to the user.
18 information service module: this module is used for system provides point-to-point short message service to the user.
19 electronic programming single modules: this module is used for set-top box, makes the user carry out the selection of media content and miscellaneous service by the pre-box of machine.
Three level nodes are the external direct service nodes of system, also are the inlets of set-top box connecting system.Set-top box is connected with three level nodes by Access Network.The module of three level nodes is formed as shown in Figure 3, mainly comprises as lower module:
1 broadcasting module: this module is used for the streaming media on demand request of set-top box module is handled.
2 broadcast module: this module is used for the Streaming Media broadcast request of set-top box module is handled.
3 streaming media service modules: this module is used to the set-top box module that the streaming medium content service is provided.
4 content distribution modules: this module is used for and the bearer network interface, and media content rationally is distributed in just in the IPTV system.
5 value-added service application management modules: this module is used for the various value-added services that managing I PTV system provides, for example: the enabling of miscellaneous service, stop, issue etc.
6 Communications service modules: this module is used for system provides visual telephone service to the user.
7 interactive game modules: this module is used for system provides the interactive game business to the user.
8 information service module: this module is used for system provides point-to-point short message service to the user.
9 electronic programming single modules: this module is used for set-top box, makes the user can carry out the selection of media content and miscellaneous service by set-top box.
Based on above-mentioned distributed networking, provide operation flow commonly used below.But this distributed IPTV system is not limited to provide following several business.
1. program request/live broadcast service flow process:
Flow chart as shown in Figure 4.
The process step explanation:
401 steps: set-top box connects by Access Network and three level nodes, request electronic program list information;
402 steps: three level nodes are to set-top box return electron programme information;
403 steps: set-top box selects a program channel request to play;
404 steps: three level nodes send a request message to two level nodes, set-top box users is carried out Authentication Authorization handle;
405 steps: if two level nodes this user's Authentication Authorization information not then sends request to a level node, otherwise to step 408;
406 steps: a level node returns to two level nodes with set-top box users Authentication Authorization result;
407 steps: two level nodes return result to three level nodes;
408 steps: if the user is the legal authorization user, whether three level node inspection this locality have corresponding media content, if there is not corresponding media content, then ask for media content to two node layers.Media content can be the on-demand media file herein, also can be live medium code stream;
409 steps: if two level nodes do not have corresponding media content yet, then two level nodes continue to obtain to a level node; Otherwise forward step 412 to;
410 steps: a level node returns two level node media content information;
411 steps: two level nodes continue to return media content information to three level nodes;
412 steps; Three level nodes return media description information to set-top box;
413 steps: set-top box and three level nodes are finished the media play process mutually alternately.
2. Communications service operation flow:
Flow chart is shown in accompanying drawing five:
The process step explanation:
501 steps: the user carries out the visual telephone dialing by set-top box;
502 steps: three level nodes send to two level nodes with user's video dialtone request, and two level nodes are to the calling and called subscription authentication, if two level nodes can authentication, then forward step 505 to, otherwise continue follow-up flow process;
503 steps: two level nodes send authentication request to a level node;
504 steps: a level node returns authenticating result to two level nodes;
505 steps: two level nodes return the authentication process result to three level nodes;
506 steps: if authentication is unsuccessful, then three level nodes return to set-top box, otherwise do not send this message;
507 steps: three level node gateways judge that the callee is set-top box or external video terminal, if then step 510 beginning of set-top box, if the external video terminal, the external video terminal address is obtained in the then direct and Communication Gateway communication by three level nodes;
508 steps: three level nodes are to set-top box returning to external video end address;
509 steps: set-top box is directly set up video session to outside video terminal;
510 steps: whether three level nodes are judged called is the interior set-top box of three level node service ranges, if then forward step 514 to; Otherwise continuation subsequent step;
511 steps:, then continue to obtain set-top box information to a level node if also do not have called set-top box in the two level range of nodes; Otherwise forward step 513 to;
512 steps: a level node returns called set-top box information to two level nodes;
513 steps: two level nodes return called set-top box information to three level nodes;
514 steps: three level nodes return called set-top box information to set-top box;
515 steps: caller set-top box and called set-top box are set up video calling.
3. interactive game operation flow:
Flow chart is shown in accompanying drawing six:
The process step explanation:
601 steps: set-top box sends the game service request to three level nodes;
602 steps: three level nodes forward user's request to two level nodes, and two level nodes carry out authentication to the user, forward step 605 to, otherwise continue subsequent step;
603 steps: two level nodes are transmitted the customer service request to a level node;
604 steps: a level node returns the authentication process result;
605 steps: two level nodes return the authentication process result to three level nodes;
606 steps: three level node Resume Mission gateway address and corresponding insertion authority sign indicating number;
607 steps: set-top box is closed with net game and is connected the beginning game service.
4. the professional flow process of information service:
Flow chart is shown in accompanying drawing seven:
The process step explanation:
701 steps: set-top box is initiated information sending request to three level nodes;
702 steps: three level nodes are transmitted user's request to two level nodes, if two level nodes can authentication, then forward step 705 to, otherwise continue subsequent step;
703 steps: two level nodes send authentication request to a level node;
704 steps: a level node returns Authentication Response to two level nodes;
705 steps: two level nodes return Authentication Response to three level nodes;
706 steps:, then return failure information if unsuccessful to customer service request authentication; Otherwise, do not need this message;
707 steps: three level nodes are transmitted to info gateway with user's information sending request, and info gateway judges whether external communication terminal or set-top box; If the external communication terminal then sends to info gateway with information sending request; Otherwise forward step 711 to;
708 steps: info gateway is transmitted to the external communication terminal with information, and receives acknowledgement information;
709 steps: info gateway returns acknowledgement information to three level nodes;
710 steps: three level nodes are transmitted to set-top box with acknowledgement information;
711 steps: three level nodes are transmitted user profile to two level nodes and are sent request;
712 steps: if the position and the authentication of the clear and definite called set-top box of two level nodes energy then forward step 714 to, otherwise continue follow-up flow process;
713 steps: a level node returns the called set-top box information of two level nodes;
714 steps: two level nodes return called set-top box information to three level nodes;
715 steps: three level nodes are transmitted to info gateway with information sending request, and carry called set-top box information;
716 steps: info gateway sends information to set-top box;
717 steps: set-top box is returned acknowledgement information and is given info gateway;
718 steps: info gateway returns acknowledgement information to three level nodes;
719 steps: three level nodes return acknowledgement information to the caller set-top box.
Claims (10)
1. the network-building method of a distributed IPTV system is characterized in that, comprising:
(1) entire I PTV system is divided into three level nodes;
(2) provide one one level node, for whole system provides overall operation support and the management of overall service application;
(2) under a level node, provide a plurality of two level nodes, link to each other with a described level node, receive the business information of obtaining overall situation issue, and use information to a described level node report of user from a described level node by backbone network;
(3) under each two level node, a plurality of three level nodes are provided again, link to each other with described two level nodes by backbone network, and be connected with set-top box by Access Network, be used for inlet as the set-top box connecting system, by obtain the information that Business Processing needs from described two level nodes, directly for the user provides IPTV service, and to the described second level node feedback processing information.
2. the network-building method of a kind of distributed IPTV system as claimed in claim 1 is characterized in that:
Also carry out following operation in the Management Layer in described first level node and two level nodes:
Carry out the plateform system management, promptly node that system has jurisdiction over is managed the relevant information of each network element in the generation system;
Carry out CP/SP and user management, promptly CP/SP and user profile are managed, handle the CAMEL-Subscription-Information of CP/SP, user's subscription and unsubscription information is revised CP/SP and user profile etc.;
Finish Certificate Authority, promptly authentication is carried out in user's miscellaneous service request, avoid disabled user's connecting system platform, use illegal professional;
Carry out set-top box management, i.e. managing I PTV platform all set-top box information of being served;
Carry out digital copyright management, promptly the streaming medium content of issuing on the IPTV platform is encrypted, avoid streaming medium content stolen;
Carry out following operation in the service application layer in described first level node and two level nodes:
Carry out contents processing, promptly the media content that is submitted to the IPTV platform is handled;
Carry out Content Management, promptly media content is managed;
Carry out the content distribution, the bearer network interface promptly is provided, media content rationally is distributed in just in the IPTV system;
The user provides electronic program list, even can carry out the selection of media content and miscellaneous service by set-top box;
Carry out Streaming Media broadcasting, promptly the Streaming Media broadcast request of set-top box is handled;
Carry out streaming media on demand, promptly the streaming media on demand request of the pre-box of machine handled:
3. the network-building method of a kind of distributed IPTV system as claimed in claim 2 is characterized in that:
In a described level node and two level node Management Layers, also carry out following operation:
Carry out statistical analysis, promptly to the customer consumption custom, the information such as pouplarity of each CP/SP content are added up, and generate satisfactory form content;
Carry out the authentication and accounting interface management, charging authentication interface function promptly externally is provided, provide different interface adaptive at different external function modules;
Charge and pay and clearing, promptly finish the clearing of customer service usage charges, and withhold accordingly.
4. the network-building method of a kind of distributed IPTV system as claimed in claim 3 is characterized in that:
In a described level node and two level node traffic application layers, also carry out following operation:
Carry out streaming media service, be set-top box the streaming medium content service is provided;
Carry out the value-added service application management, i.e. the various value-added services that provide of managing I PTV system.
5. the network-building method of a kind of distributed IPTV system as claimed in claim 4 is characterized in that:
In a described level node and two level node traffic application layers, also carry out following operation:
Communicate service, promptly provide visual telephone service the user;
Interactive game is provided, promptly provides the interactive game business the user;
Information service is provided, promptly provides point-to-point short message service the user.
6. as the network-building method of the described any distributed IPTV system of claim 2～5, it is characterized in that:
In described three level nodes, carry out following operation:
Carry out the content distribution, be about to media content and rationally be distributed in just in the IPTV system;
The user provides electronic program list, even can carry out the selection of media content and miscellaneous service by set-top box;
Carry out Streaming Media broadcasting, promptly the Streaming Media broadcast request of set-top box is handled;
Carry out streaming media on demand, promptly the streaming media on demand request of set-top box is handled;
Carry out streaming media service, be set-top box the streaming medium content service is provided.
7. as the network-building method of the described any distributed IPTV system of claim 3～5, it is characterized in that:
In described three level nodes, can also carry out following operation:
Carry out the value-added service application management, i.e. the various value-added services that provide of managing I PTV system;
Communication service is provided, promptly provides visual telephone service the user;
Interactive game is provided, promptly provides the interactive game business the user;
Information service is provided, promptly provides point-to-point short message service the user.
8. distributed IPTV service implementation method may further comprise the steps:
(1) authentication step comprises
Two level nodes receive the service request that the user sends by three level nodes;
Two level nodes carry out authentication to user request information,
If two level nodes can authentication, then return authenticating result to three level nodes;
If two level nodes can not authentication, then send authentication request to a level node;
One level node returns authenticating result to two level nodes and then to three level nodes;
(2) business provides step, comprises
Three level nodes receive authenticating result;
Three level nodes provide professional according to authenticating result,
If three level nodes possess the business tine of user's request, then provide professional to user side by three level nodes; If three level nodes do not possess the business tine of user request, then obtain business to two level nodes, two level nodes are this business tine not also, then obtains business to a level node.
9. a kind of distributed IPTV service implementation method as claimed in claim 9 is characterized in that also comprising:
Described authentication step also comprises the authentication to the called subscriber.
10. a kind of distributed IPTV service implementation method as claimed in claim 8 is characterized in that also comprising:
Described business provides step also to comprise the calling subscriber is returned acknowledgement information.
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| WO2010118595A1 (en) * | 2009-04-15 | 2010-10-21 | 中兴通讯股份有限公司 | Creation method of multimedia service and system thereof |
| CN101394427B (en) * | 2008-11-10 | 2011-04-13 | 中国联合网络通信集团有限公司 | Internet service implementation method and system based on network television |
| CN102724655A (en) * | 2011-03-29 | 2012-10-10 | 中国联合网络通信集团有限公司 | Value-added service demand system and method |
| CN102905163A (en) * | 2011-07-29 | 2013-01-30 | 上海帕科软件科技有限公司 | IPTV (internet protocol television) system based on enterprise interaction |
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| WO2019196814A1 (en) * | 2018-04-09 | 2019-10-17 | 华为技术有限公司 | Method for accessing service network, and communication apparatus |
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2006
- 2006-12-20 CN CNB2006101674488A patent/CN100571177C/en not_active Expired - Fee Related
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| CN101394427B (en) * | 2008-11-10 | 2011-04-13 | 中国联合网络通信集团有限公司 | Internet service implementation method and system based on network television |
| WO2010118595A1 (en) * | 2009-04-15 | 2010-10-21 | 中兴通讯股份有限公司 | Creation method of multimedia service and system thereof |
| CN101572715B (en) * | 2009-04-15 | 2014-03-19 | 中兴通讯股份有限公司 | Multimedia service creating method and system |
| CN102724655A (en) * | 2011-03-29 | 2012-10-10 | 中国联合网络通信集团有限公司 | Value-added service demand system and method |
| CN102724655B (en) * | 2011-03-29 | 2014-08-13 | 中国联合网络通信集团有限公司 | Value-added service demand system and method |
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| CN102905163B (en) * | 2011-07-29 | 2018-08-10 | 上海帕科软件科技股份有限公司 | IPTV system based on business interaction |
| US9930411B2 (en) | 2012-11-05 | 2018-03-27 | Zte Corporation | Networking method and networking device |
| CN109218782A (en) * | 2017-07-07 | 2019-01-15 | 中国电信股份有限公司 | Interactive television service activating method, device and system |
| CN109218782B (en) * | 2017-07-07 | 2021-08-27 | 中国电信股份有限公司 | Interactive television service opening method, device and system |
| WO2019196814A1 (en) * | 2018-04-09 | 2019-10-17 | 华为技术有限公司 | Method for accessing service network, and communication apparatus |
| US11553339B2 (en) | 2018-04-09 | 2023-01-10 | Huawei Technologies Co., Ltd. | Method for accessing serving network and communications apparatus |
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