WO2009036626A1 - A streams distribution method for use in iptv system - Google Patents

A streams distribution method for use in iptv system Download PDF

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Publication number
WO2009036626A1
WO2009036626A1 PCT/CN2007/003617 CN2007003617W WO2009036626A1 WO 2009036626 A1 WO2009036626 A1 WO 2009036626A1 CN 2007003617 W CN2007003617 W CN 2007003617W WO 2009036626 A1 WO2009036626 A1 WO 2009036626A1
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WO
WIPO (PCT)
Prior art keywords
content
function module
distribution
stream
preparation
Prior art date
Application number
PCT/CN2007/003617
Other languages
French (fr)
Chinese (zh)
Inventor
Hongfei Xia
Jie Hu
Dong Wang
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Publication of WO2009036626A1 publication Critical patent/WO2009036626A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6175—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6338—Control signals issued by server directed to the network components or client directed to network

Definitions

  • the present invention relates to an interactive network television system, and more particularly to a stream distribution technique of an interactive network television system.
  • BACKGROUND OF THE INVENTION With the in-depth development of interactive network television systems (also known as IPTV systems) technology, the increase in the number of users has put forward higher requirements for system performance and reliability, especially the content delivery function of interactive networks. The clarification of the functional responsibilities of the internal modules and the interaction with the functions of other systems is a very important research topic. It is important to clarify the main responsibilities of each function and reduce the interaction between the various parts of the system to obtain a better user experience. It puts higher demands on the content distribution and the simplicity and reliability of the business process.
  • IPTV IPTV technology
  • the IPTV products of each company are for each subsystem in the IPTV system (mainly including IPTV terminal functions, IPTV application functions, content distribution functions, management).
  • IPTV terminal functions mainly including IPTV terminal functions, IPTV application functions, content distribution functions, management.
  • the positioning of functions, etc., and the logical relationship between the interfaces are not clear.
  • the NGN architecture the NGN IMS architecture or the non-NGN architecture
  • the implementation of the interactive network TV service is currently a hot topic in the research of major standards organizations, there is no final conclusion.
  • IMS architecture there is currently no better solution for how to support interactive video TV, which is a complex video service.
  • a stream distribution method for an interactive network television system for a case where a content provider has transmitted content to a content preparation function module, comprising the following steps: Step S102, a content preparation function module distributes content to a content Controlling the function module to perform a request for stream distribution; Step S104, the content distribution and location control function module receives the request for stream distribution of the content preparation function module, and generates a distribution task according to the distribution policy; Step S106, the content distribution and location control function module and The content delivery interacts with the storage function module, and responds to the streaming request of the content preparation function module; and in step S108, the content preparation function module distributes the stream to the content delivery and storage function module.
  • step S102 of the method before the content preparation function module makes a stream distribution request to the content distribution and location control function module, the content preparation function module completes preparation for transmitting the stream to the content distribution and location control function module.
  • the preparation for the content preparation function module to send the stream to the content distribution and location control function module includes at least one of the following steps: aggregating the file content; encoding the file content; and performing content management on the file content; And encrypting the contents of the file.
  • the distribution policy may employ a static configuration to establish a transparent channel between the content preparation function module to the content delivery and storage function module, and between the content delivery and storage function modules. In addition, in this approach, the distribution policy can enable dynamic distribution of policies.
  • the dynamic distribution policy mode is enabled to include load information, which sends the flow to the content delivery and storage function module with small load.
  • the content distribution and location control function module generates a stream transmission request for transmitting a content preparation function to the content delivery and storage function module after the distribution task.
  • the content delivery and storage function module confirms the flow request message to the content distribution and location control function module.
  • the content delivery function module in the content delivery and storage function module receives the media stream.
  • the flow distribution method of the interactive network television system provided by the present invention is clear and simple, and can be compatible with the current IMS-based IPTV and NGN-based architecture.
  • IPTV and IPTV systems based on non-NGN architecture.
  • the responsibilities of each subsystem in the system are very clear, and the process is very scalable.
  • the invention enhances the low cost, reliability and expandability of various parts of the interactive network television system, and enhances the core competitiveness of the IPTV system.
  • Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention will be realized and attained by the ⁇ RTI
  • the drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention.
  • FIG. 1 is a flow chart showing a flow distribution method for an interactive network television system according to an embodiment of the present invention
  • FIG. 2 is a diagram showing an interactive network according to another embodiment of the present invention.
  • 1 is a flow chart showing a flow distribution method for an interactive network television system according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps: Step S102: The content preparation function module performs a flow distribution request to the content distribution and location control function module.
  • Step S104 The content distribution and location control function module receives the flow distribution of the content preparation function module. After the request, the distribution task is generated according to the distribution policy; step S106, the content distribution and location control function module interacts with the content delivery and storage function module, and responds to the stream delivery request of the content preparation function module; and in step S108, the content preparation function module distributes the stream To the content delivery and storage function module.
  • step S102 of the method before the content preparation function module performs a stream distribution request to the content distribution and location control function module, the content quiz function module completes the stream transmission to the content distribution and Preparation of the position control function module.
  • the preparation for the content preparation function module to send the stream to the content distribution and location control function module includes at least one of the following steps: aggregating the file content; encoding the file content; and performing content management on the file content; And encrypting the contents of the file.
  • the distribution policy may employ a static configuration to establish a transparent channel between the content preparation function module to the content delivery and storage function module, and between the content delivery and storage function modules.
  • the distribution policy can be enabled in a manner that enables dynamic distribution of policies.
  • the dynamic distribution policy mode is enabled to include load information, which sends the flow to the content delivery and storage function module with small load.
  • the content distribution and location control function module generates a stream transmission request for transmitting a content preparation function to the content delivery and storage function module after the distribution task.
  • the content delivery and storage function module confirms the flow request message to the content distribution and location control function module.
  • the content delivery function module in the content delivery and storage function module receives the media stream. 2 is a flow chart showing the flow distribution of an interactive network television system in accordance with another embodiment of the present invention.
  • Content Preparation Functions Content provided by the Content Provider (including content provided by third-party systems outside the IPTV system) and metadata Modules for content aggregation (Content Aggregation), content management (Content Management), metadata processing (metadata processing), and content ⁇ dense.
  • the functional module can be used to convert content provided by a content provider into a known format that needs to be sent to an IPTV terminal.
  • the general principle of the function module is as follows: First, the content provided by the content provider is obtained by the content aggregation function in the content preparation function module.
  • Metadata and permission information is sent to the metadata processing function module, and the content needs to be re-encoded using Content Processing and Content Encryption functions before being sent to the Content Delivery function module.
  • Content Distribution and Location Control Function Module Control content distribution and blocking functions to optimize content distribution, select and deliver content to end users. It mainly includes two main functions: Distribution Control Function and Location Control Function.
  • the distribution control function is mainly to optimize the content distribution policy, which manages the distribution information of the content delivery and storage function modules.
  • the location control function is used to identify the best location information for the content delivery and storage function module delivery content to the media client.
  • the selection criteria mainly include distribution information and load status of content delivery and storage functions, and terminal information (such as information on the location and capabilities of the terminal).
  • Content Delivery & Storage Functions The ability to distribute, cache, and store content and send it to end users.
  • the function module is capable of handling media control messages, such as: pause, fast forward, to control the media stream of the IPTV system.
  • the functional modules mainly include delivery functions (unicast and multicast delivery methods), caching and storage functions, and distribution functions.
  • the delivery function is mainly to send the content stream to be delivered to the media client. It is also possible to provide file download and upload files from the media client.
  • the caching and storage functions are primarily responsible for caching time-shifted live streams and storage streams.
  • the distribution function is primarily responsible for distributing live and storage streams between delivery and storage functions within the content delivery and storage functions, as well as receiving content for content preparation functions.
  • the flow distribution process specifically includes the following steps:
  • the preset condition of the step is:
  • the content provider has sent a stream (generally referred to as a live stream) to the content preparation function module.
  • Step 202 The content preparation function module completes preparation for sending content aggregation, content encoding, content management, and encryption processing of the live stream to the content distribution and location control function module.
  • Step 204 The content preparation function module performs a request for distributing the flow to the content distribution and location control function module.
  • Step 206 After receiving the flow distribution request of the content preparation function module, the content distribution and location control function module generates a distribution task according to the distribution policy, and can relay the flow request in real time, and can distribute the live stream in a static manner and establish content through static configuration. Prepare a transparent channel from the function module to the flow between the content delivery and storage function modules, and between the content delivery and storage function modules. It is also possible to enable the dynamic distribution policy, and according to the service state of the content delivery and storage function module, that is, the load information, the flow is sent to the content delivery and storage function module with small load.
  • Step 208 The content distribution and location control function module forwards a stream sending request of the content preparation function to the content delivery and storage function module.
  • Step 210 The content delivery and storage function module returns a content distribution and location control function module flow distribution confirmation message.
  • Step 212 The content distribution and location control function module sends the content delivery and the message obtained by the storage function module to the stream to the content preparation function module.
  • Step 214 The content preparation function module distributes the live stream to the content delivery and storage function module according to the specified live stream relay policy according to the returned message.
  • Step 216 The content delivery function in the content delivery and storage function module serves as a relay receiving medium, and the user can request the media stream.
  • the flow distribution method of the interactive network television system provided by the present invention is clear and simple, and can be compatible with the current IMS-based IPTV, the NGN-based IPTV, and the non-NGN-based IPTV system.
  • the responsibilities of each subsystem in the system are very clear, and the process is very scalable.
  • the invention enhances the low cost, reliability and expandability of various parts of the interactive network television system, and enhances the core competitiveness of the IPTV system.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

A streams distribution method for use in IPTV system includes the following steps: the content preparation function module sends a request for streams distribution to the content distribution and location control function module (S 102); the content distribution and location control function module produces distribution tasks according to the distribution strategy after receiving the request for streams distribution from the content preparation function module (S 104); the content distribution and location control function module interacts with the content delivery and storage function module, responds the streams distribution request from the content preparation function module (S 106); and the content preparation function module distributes the streams to the content delivery and storage function module (S 108). The invention can reduce the cost of the respective components of the IPTV system, improve the reliability and expansibility of the respective components of the IPTV system, and can improve the core competition ability of the IPTV system.

Description

用于交互式网络电视系统的流分发方法 技术领域 本发明涉及交互式网络电视系统， 具体地， 涉及交互式网络电视系统的 流分发技术。 背景技术 随着交互式网络电视系统（也称 IPTV系统）技术的深入开展， 使用用 户数的增加， 对系统性能和可靠性提出了更高的要求， 特別是交互式网络的 内容交付功能， 其内部模块功能职责的明晰、 与其他系统的功能交互是个非 常重要的研究课题。 尽量明确各个功能的主要职责、 减少系统各个部分之间 的交互从而获得更好的用户体验变得非常重要， 对内容分发及业务流程的简 洁性和可靠性提出了更高的要求。 由于目前 IPTV技术还处于发展阶段， 国际和国内的标准制定工作还处 于起步阶段， 各公司的 IPTV产品对 IPTV系统中的各个子系统（主要包括 IPTV终端功能、 IPTV应用功能、 内容分发功能、 管理功能等） 的定位及相 互之间的接口逻辑关系定义不清晰。 是否是基于 NGN架构、 NGN IMS架构 或者是非 NGN架构下如果实现交互式网络电视业务是目前各大标准组织研 究的热点， 目前还没有定论。 比如在 IMS架构下， 如何支持交互式网络电视 这种复杂的视频类业务目前还没有一个较好的解决方案； 还有交互式网络电 视里面存在一个非常重要的区别于众多业务的内容交付功能， 由于其要完成 众多业务提供商提供的大量文件或者直播、 时移流的内容的分发和存储及对 终端的视频服务、 其功能的合理定位及和其他功能的交互来考虑如何提高交 互式网络电视系统的性能也是一个非常重要的问题。 为此，如何设计一个高效的内容交付系统、 与完成基于丈件和流的内容 的分发、 尽量减少各个功能的交互成为交互式网络电视系统面临的众多问题 中的一个非常重要的课题。 发明内容 考虑到上述问题而做出本发明， 为此， 本发明的主要目的在于， 提供一 种用于交互式网络电视系统的流分发方法。 根据本发明的用于交互式网络电视系统的流分发方法，用于内容提供商 已经将内容发送给内容准备功能模块的情况， 包括以下步骤： 步驟 S 102, 内 容准备功能模块向内容分发与位置控制功能模块进行流分发的请求； 步骤 S104, 内容分发与位置控制功能模块收到内容准备功能模块的流分发的清求 后根据分发策略产生分发任务； 步骤 S106, 内容分发与位置控制功能模块与 内容交付与存储功能模块交互， 响应内容准备功能模块的流发送请求； 以及 步骤 S 108 , 内容准备功能模块将流分发到内容交付与存储功能模块。 在该方法的步驟 S102中， 内容准备功能模块向内容分发与位置控制功 能模块进行流分发请求之前， 内容准备功能模块完成将流发送到内容分发与 位置控制功能模块的准备工作。 其中， 在内容准备功能模块完成将流发送到 内容分发与位置控制功能模块的准备工作包括以下步骤中的至少一项： 对文 件内容进行聚合； 对文件内容进行编码； 对文件内容进行内容管理； 以及对 文件内容进行加密处理。 此外， 在该方法中，分发策略可采用静态配置建立内容准备功能模块到 内容交付与存储功能模块间、 以及内容交付与存储功能模块之间的流的透明 通道。 此外， 在该方法中， 分发策略可启用动态分发策略的方式进亍。 其中， 根据内容交付与存储功能模块的服务状态， 启用动态分发策略方式包括负荷 信息， 其将流发送到负荷小的内容交付与存储功能模块上。 此外， 在该方法中， 内容分发与位置控制功能模块产生分发任务后向内 容交付与存储功能模块发送内容准备功能的流发送请求。 同时， 内容交付与 存储功能模块向内容分发与位置控制功能模块确认流请求消息。 此外， 在该方法中， 在步骤 S108之后， 内容交付与存储功能模块中的 内容交付功能模块接收媒体流。 通过本发明的上述方面，本发明提供的交互式网络电视系统的流分发方 法流程清晰简单， 能同时兼容目前的基于 IMS架构的 IPTV、基于 NGN架构 的 IPTV和基于非 NGN架构的 IPTV系统。 系统中各个子系统的职责非常清 晰， 并且该流程可扩展性非常好。 本发明增强了交互式网絡电视系统的各个 部分的低成本性、 可靠性和扩展性， 提升了 IPTV系统的核心竟争力。 本发明的其它特征和优点将在随后的说明书中阐述， 并且，部分地从说 明书中变得显而易见， 或者通过实施本发明而了解。 本发明的目的和其他优 点可通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实 现和获得。 附图说明 附图用来提供对本发明的进一步理解， 并且构成说明书的一部分， 与本 发明的实施例一起用于解释本发明， 并不构成对本发明的限制。 在附图中： 图 1 是示出了根据本发明实施例的用于交互式网络电视系统的流分发 方法的流程图； 以及 图 2 是示出了根据本发明另一实施例的交互式网络电视系统的流分发 的流程图。 具体实施方式 以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述 的优选实施例仅用于说明和解释本发明 , 并不用于限定本发明。 图 1 是示出了根据本发明实施例的用于交互式网络电视系统的流分发 方法的流程图。 如图 1所示， 包括以下步骤： 步骤 S102, 内容准备功能模块向内容分 发与位置控制功能模块进行流分发的请求； 步骤 S104, 内容分发与位置控制 功能模块收到内容准备功能模块的流分发的请求后根据分发策略产生分发任 务； 步驟 S106, 内容分发与位置控制功能模块与内容交付与存储功能模块交 互， 响应内容准备功能模块的流发送请求； 以及步驟 S108, 内容准备功能模 块将流分发到内容交付与存储功能模块。 在该方法的步骤 S102中， 内容准备功能模块向内容分发与位置控制功 能模块进行流分发请求之前， 内容准务功能模块完成将流发送到内容分发与 位置控制功能模块的准备工作。 其中， 在内容准备功能模块完成将流发送到 内容分发与位置控制功能模块的准备工作包括以下步骤中的至少一项： 对文 件内容进行聚合； 对文件内容进行编码； 对文件内容进行内容管理； 以及对 文件内容进行加密处理。 此外，在该方法中， 分发策略可采用静态配置建立内容准备功能模块到 内容交付与存储功能模块间、 以及内容交付与存储功能模块之间的流的透明 通道。 此外， 在该方法中， 分发策略可启用动态分发策略的方式进行。 其中， 根据内容交付与存储功能模块的服务状态， 启用动态分发策略方式包括负荷 信息， 其将流发送到负荷小的内容交付与存储功能模块上。 此外，在该方法中， 内容分发与位置控制功能模块产生分发任务后向内 容交付与存储功能模块发送内容准备功能的流发送请求。 同时， 内容交付与 存储功能模块向内容分发与位置控制功能模块确认流请求消息。 此外， 在该方法中， 在步驟 S108之后， 内容交付与存储功能模块中的 内容交付功能模块接收媒体流。 图 2 是示出了根据本发明另一实施例的交互式网絡电视系统的流分发 的流程图。 如图 2所示， 它包括以下功能模块： 内容准备功能模块 ( Content Preparation Functions ): 对内容提供商 ( Content Provider )提供的内容（包括 IPTV系统之外的第三方系统提供的 内容） 和元数据进亍内容聚合 ( Content Aggregation )、 内容管理 （Content Management )> 元数据处理 ( Metadata Processing ), 内容力 σ密等功能的模块。 该功能模块可以用于将内容提供商提供的内容转换成为已知的需要发送到 IPTV终端的格式。该功能模块一般原理如下： 首先内容提供商提供的内容被 内容准备功能模块中的内容聚合功能获取。 元数据和权限信息发送到元数据 处理功能模块， 内容在发送到内容交付 ( Content Delivery )功能模块之前一 殳需要利用内容处理 ( Content Processing )和内容力口密（ Content Encryption ) 功能重新进行编码和加密。 内容分发与位置控制功能模块（ Content Distribution & Location Control Functions ): 对内容分发和内 堵功能进行控制，来优化内容分发 ( content distribution )、 选择和传送内容到终端用户。 主要包括两个主要功能： 分发控 制功能 ( Distribution Control Function ) 和位置控 功能 ( Location Control Function )。 分发控制功能主要是优化内容分发策略， 该功能管理内容交付与 存储功能模块的分布信息。 位置控制功能用于识别内容交付与存储功能模块 交付内容到媒体客户端的最佳位置信息。 其选择尺度主要包括分布信息和内 容交付与存储功能的负载状态、 终端信息 （例如终端的位置和能力等信息）。 内容交付与存 4诸功能模块 ( Content Delivery & Storage Functions ): 完成 分发、 緩存和存储内容并且发送到终端用户的功能。 该功能模块能够处理媒 体控制消息， 例如： 暂停、 快进， 以控制 IPTV系统的媒体流。 该功能模块 主要包括交付功能（单播和组播交付方式）、緩存和存储功能及分发功能。 交 付功能主要是将要交付的内容流发送到媒体客户端。 也可以提供从媒体客户 端的文件下载和上传文件功能。 緩存和存储功能主要负责緩存时移直播流和 存储流。 分发功能主要负责在内容交付与存储功能内部的交付和存储功能之 间分发直播流和存储流， 也可以接收内容准备功能的内容。 如图 2所示， 流分发流程具体包括以下步骤： 该步骤的预置条件是： 内容提供商已经将流（一般指的是直播流 )发送 给内容准备功能模块。 步骤 202, 内容准备功能模块完成直播流的内容聚合、 内容编码、 内容 管理和加密处理等发送到内容分发与位置控制功能模块前的准备工作。 步骤 204， 内容准备功能模块向内容分发与位置控制功能模块进行分发 流的请求。 步骤 206 , 内容分发与位置控制功能模块收到内容准备功能模块的流分 发请求后根据分发策略产生分发任务， 可以实时对流请求进行中继， 其可采 用静态方式分发直播流， 通过静态配置建立内容准备功能模块到内容交付与 存储功能模块间、 以及内容交付与存储功能模块之间的流的透明通道。 也可 以启用动态分发策略的方式进行，根据内容交付与存储功能模块的服务状态， 即， 负荷信息， 将流发送到负荷小的内容交付与存储功能模块上。 步骤 208, 内容分发与位置控制功能模块向内容交付与存储功能模块转 发内容准备功能的流发送请求。 步骤 210 , 内容交付与存储功能模块返回内容分发与位置控制功能模块 流分发确认消息。 步骤 212, 内容分发与位置控制功能模块将内容交付与存储功能模块获 取的转发给流的消息发送到内容准备功能模块。 步骤 214， 内容准备功能模块按照返回的消息根据指定的直播流中继策 略将直播流分发到内容交付与存储功能模块。 步骤 216 , 内容交付与存储功能模块中的内容交付功能作为中继接收媒 体 , 用户可以请求该媒体流。 综上所述，通过本发明提供的交互式网络电视系统的流分发方法流程清 晰简单， 能同时兼容目前的基于 IMS架构的 IPTV、 基于 NGN架构的 IPTV 和基于非 NGN架构的 IPTV系统。 系统中各个子系统的职责非常清晰， 并且 该流程可扩展性非常好。 本发明增强了交互式网络电视系统的各个部分的低 成本性、 可靠性和扩展性， 提升了 IPTV系统的核心竟争力。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明，对于本 领 i或的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interactive network television system, and more particularly to a stream distribution technique of an interactive network television system. BACKGROUND OF THE INVENTION With the in-depth development of interactive network television systems (also known as IPTV systems) technology, the increase in the number of users has put forward higher requirements for system performance and reliability, especially the content delivery function of interactive networks. The clarification of the functional responsibilities of the internal modules and the interaction with the functions of other systems is a very important research topic. It is important to clarify the main responsibilities of each function and reduce the interaction between the various parts of the system to obtain a better user experience. It puts higher demands on the content distribution and the simplicity and reliability of the business process. As IPTV technology is still in the development stage, international and domestic standards development work is still in its infancy. The IPTV products of each company are for each subsystem in the IPTV system (mainly including IPTV terminal functions, IPTV application functions, content distribution functions, management). The positioning of functions, etc., and the logical relationship between the interfaces are not clear. Whether it is based on the NGN architecture, the NGN IMS architecture or the non-NGN architecture, if the implementation of the interactive network TV service is currently a hot topic in the research of major standards organizations, there is no final conclusion. For example, under the IMS architecture, there is currently no better solution for how to support interactive video TV, which is a complex video service. There is also a very important content delivery function in interactive network TV that is different from many services. Consider how to improve the interactive network TV system by completing the large number of files provided by many service providers or the distribution and storage of live streaming, time-shifted content, and the video services of the terminal, the proper positioning of its functions, and interaction with other functions. The performance is also a very important issue. To this end, how to design an efficient content delivery system, complete the distribution of content based on the parts and streams, and minimize the interaction of various functions has become a very important issue in the many problems faced by interactive network television systems. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is a primary object of the present invention to provide a stream distribution method for an interactive network television system. A stream distribution method for an interactive network television system according to the present invention, for a case where a content provider has transmitted content to a content preparation function module, comprising the following steps: Step S102, a content preparation function module distributes content to a content Controlling the function module to perform a request for stream distribution; Step S104, the content distribution and location control function module receives the request for stream distribution of the content preparation function module, and generates a distribution task according to the distribution policy; Step S106, the content distribution and location control function module and The content delivery interacts with the storage function module, and responds to the streaming request of the content preparation function module; and in step S108, the content preparation function module distributes the stream to the content delivery and storage function module. In step S102 of the method, before the content preparation function module makes a stream distribution request to the content distribution and location control function module, the content preparation function module completes preparation for transmitting the stream to the content distribution and location control function module. The preparation for the content preparation function module to send the stream to the content distribution and location control function module includes at least one of the following steps: aggregating the file content; encoding the file content; and performing content management on the file content; And encrypting the contents of the file. Further, in the method, the distribution policy may employ a static configuration to establish a transparent channel between the content preparation function module to the content delivery and storage function module, and between the content delivery and storage function modules. In addition, in this approach, the distribution policy can enable dynamic distribution of policies. According to the service state of the content delivery and storage function module, the dynamic distribution policy mode is enabled to include load information, which sends the flow to the content delivery and storage function module with small load. Further, in the method, the content distribution and location control function module generates a stream transmission request for transmitting a content preparation function to the content delivery and storage function module after the distribution task. At the same time, the content delivery and storage function module confirms the flow request message to the content distribution and location control function module. Further, in the method, after the step S108, the content delivery function module in the content delivery and storage function module receives the media stream. Through the above aspects of the present invention, the flow distribution method of the interactive network television system provided by the present invention is clear and simple, and can be compatible with the current IMS-based IPTV and NGN-based architecture. IPTV and IPTV systems based on non-NGN architecture. The responsibilities of each subsystem in the system are very clear, and the process is very scalable. The invention enhances the low cost, reliability and expandability of various parts of the interactive network television system, and enhances the core competitiveness of the IPTV system. Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention will be realized and attained by the <RTI The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawings: FIG. 1 is a flow chart showing a flow distribution method for an interactive network television system according to an embodiment of the present invention; and FIG. 2 is a diagram showing an interactive network according to another embodiment of the present invention. A flow chart of the flow distribution of a television system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention are described with reference to the accompanying drawings. 1 is a flow chart showing a flow distribution method for an interactive network television system according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps: Step S102: The content preparation function module performs a flow distribution request to the content distribution and location control function module. Step S104: The content distribution and location control function module receives the flow distribution of the content preparation function module. After the request, the distribution task is generated according to the distribution policy; step S106, the content distribution and location control function module interacts with the content delivery and storage function module, and responds to the stream delivery request of the content preparation function module; and in step S108, the content preparation function module distributes the stream To the content delivery and storage function module. In step S102 of the method, before the content preparation function module performs a stream distribution request to the content distribution and location control function module, the content quiz function module completes the stream transmission to the content distribution and Preparation of the position control function module. The preparation for the content preparation function module to send the stream to the content distribution and location control function module includes at least one of the following steps: aggregating the file content; encoding the file content; and performing content management on the file content; And encrypting the contents of the file. Further, in the method, the distribution policy may employ a static configuration to establish a transparent channel between the content preparation function module to the content delivery and storage function module, and between the content delivery and storage function modules. Additionally, in this approach, the distribution policy can be enabled in a manner that enables dynamic distribution of policies. According to the service state of the content delivery and storage function module, the dynamic distribution policy mode is enabled to include load information, which sends the flow to the content delivery and storage function module with small load. Further, in the method, the content distribution and location control function module generates a stream transmission request for transmitting a content preparation function to the content delivery and storage function module after the distribution task. At the same time, the content delivery and storage function module confirms the flow request message to the content distribution and location control function module. Further, in the method, after the step S108, the content delivery function module in the content delivery and storage function module receives the media stream. 2 is a flow chart showing the flow distribution of an interactive network television system in accordance with another embodiment of the present invention. As shown in Figure 2, it includes the following functional modules: Content Preparation Functions: Content provided by the Content Provider (including content provided by third-party systems outside the IPTV system) and metadata Modules for content aggregation (Content Aggregation), content management (Content Management), metadata processing (metadata processing), and content σ dense. The functional module can be used to convert content provided by a content provider into a known format that needs to be sent to an IPTV terminal. The general principle of the function module is as follows: First, the content provided by the content provider is obtained by the content aggregation function in the content preparation function module. Metadata and permission information is sent to the metadata processing function module, and the content needs to be re-encoded using Content Processing and Content Encryption functions before being sent to the Content Delivery function module. encryption. Content Distribution and Location Control Function Module (Content Distribution & Location Control Functions ): Control content distribution and blocking functions to optimize content distribution, select and deliver content to end users. It mainly includes two main functions: Distribution Control Function and Location Control Function. The distribution control function is mainly to optimize the content distribution policy, which manages the distribution information of the content delivery and storage function modules. The location control function is used to identify the best location information for the content delivery and storage function module delivery content to the media client. The selection criteria mainly include distribution information and load status of content delivery and storage functions, and terminal information (such as information on the location and capabilities of the terminal). Content Delivery & Storage Functions: The ability to distribute, cache, and store content and send it to end users. The function module is capable of handling media control messages, such as: pause, fast forward, to control the media stream of the IPTV system. The functional modules mainly include delivery functions (unicast and multicast delivery methods), caching and storage functions, and distribution functions. The delivery function is mainly to send the content stream to be delivered to the media client. It is also possible to provide file download and upload files from the media client. The caching and storage functions are primarily responsible for caching time-shifted live streams and storage streams. The distribution function is primarily responsible for distributing live and storage streams between delivery and storage functions within the content delivery and storage functions, as well as receiving content for content preparation functions. As shown in FIG. 2, the flow distribution process specifically includes the following steps: The preset condition of the step is: The content provider has sent a stream (generally referred to as a live stream) to the content preparation function module. Step 202: The content preparation function module completes preparation for sending content aggregation, content encoding, content management, and encryption processing of the live stream to the content distribution and location control function module. Step 204: The content preparation function module performs a request for distributing the flow to the content distribution and location control function module. Step 206: After receiving the flow distribution request of the content preparation function module, the content distribution and location control function module generates a distribution task according to the distribution policy, and can relay the flow request in real time, and can distribute the live stream in a static manner and establish content through static configuration. Prepare a transparent channel from the function module to the flow between the content delivery and storage function modules, and between the content delivery and storage function modules. It is also possible to enable the dynamic distribution policy, and according to the service state of the content delivery and storage function module, that is, the load information, the flow is sent to the content delivery and storage function module with small load. Step 208: The content distribution and location control function module forwards a stream sending request of the content preparation function to the content delivery and storage function module. Step 210: The content delivery and storage function module returns a content distribution and location control function module flow distribution confirmation message. Step 212: The content distribution and location control function module sends the content delivery and the message obtained by the storage function module to the stream to the content preparation function module. Step 214: The content preparation function module distributes the live stream to the content delivery and storage function module according to the specified live stream relay policy according to the returned message. Step 216: The content delivery function in the content delivery and storage function module serves as a relay receiving medium, and the user can request the media stream. In summary, the flow distribution method of the interactive network television system provided by the present invention is clear and simple, and can be compatible with the current IMS-based IPTV, the NGN-based IPTV, and the non-NGN-based IPTV system. The responsibilities of each subsystem in the system are very clear, and the process is very scalable. The invention enhances the low cost, reliability and expandability of various parts of the interactive network television system, and enhances the core competitiveness of the IPTV system. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

权 利 要 求 书 一种用于交互式网络电视系统的流分发方法， 用于内容提供商已经将内 容发送给内容准备功能模块的情况， 其特征在于， 所述方法包括以下步 骤： A flow distribution method for an interactive network television system for a content provider to transmit content to a content preparation function module, characterized in that the method comprises the following steps:
步骤 S102, 内容准备功能模块向内容分发与位置控制功能模块进 行流分发的清求；  Step S102, the content preparation function module performs a stream request distribution to the content distribution and location control function module;
步骤 S104, 所述内容分发与位置控制功能模块收到所述内容准备 功能模块的流分发的请求后根据分发策略产生分发任务；  Step S104, the content distribution and location control function module generates a distribution task according to the distribution policy after receiving the request for stream distribution of the content preparation function module;
步骤 S106, 所述内容分发与位置控制功能模块与内容交付与存储 功能模块交互， 响应所述内容准备功能模块的所述流发送请求； 以及 步骤 S 108， 所述内容准备功能模块将所述流分发到所述内容交付 与存储功能模块。 根据权利要求 1所述的方法， 其特征在于， 在所述步驟 S102中， 所述内 容准备功能模块向所述内容分发与位置控制功能模块进行所述流分发请 求之前， 所述内容准备功能模块完成将所述流发送到所述内容分发与位 置控制功能模块的准备工作。 冲艮据权利要求 2所述的方法， 其特征在于， 在所述内容准备功能模块完 成将所述流发送到所迷内容分发与位置控制功能模块的准备工作包括以 下步 中的至少一项：  Step S106, the content distribution and location control function module interacts with the content delivery and storage function module, and responds to the stream sending request of the content preparation function module; and step S108, the content preparation function module uses the stream Distribute to the content delivery and storage function module. The method according to claim 1, wherein in the step S102, before the content preparation function module performs the stream distribution request to the content distribution and location control function module, the content preparation function module Preparation for sending the stream to the content distribution and location control function module is completed. The method of claim 2, wherein the preparation of the content preparation function module to send the stream to the content distribution and location control function module comprises at least one of the following steps:
对文件内容进行聚合；  Aggregate the contents of the file;
对所述文件内容进行编码；  Encoding the contents of the file;
对所述文件内容进行内容管理； 以及  Content management of the content of the file;
对所述文件内容进行加密处理。 根据权利要求 1至 3中任一项所述的方法， 其特征在于， 所述分发策略 可采用静态方式进行所述流分发， 通过静态配置建立所述内容准备功能 模块到所述内容交付与存储功能模块间、 以及内容交付与存储功能模块 之间的流的透明通道。 根据权利要求 1至 3中任一项所述的方法， 其特征在于， 所述分发策略 启用动态分发策略的方式进行。 Encrypting the content of the file. The method according to any one of claims 1 to 3, wherein the distribution policy may perform the flow distribution in a static manner, and establish the content preparation function module to the content delivery and storage by static configuration. A transparent channel between the functional modules and between the content delivery and storage function modules. The method according to any one of claims 1 to 3, characterized in that the distribution policy is performed in a manner that enables a dynamic distribution policy.
6. 根据权利要求 5所述的方法， 其特征在于， 居所述内容交付与存储功 能模块的服务状态， 所述启用动态分发策略方式包括负荷信息， 其将所 述流发送到负荷小的内容交付与存储功能模块上。 6. The method according to claim 5, wherein the content of the content delivery and storage function module is enabled, the mode of enabling the dynamic distribution policy comprises load information, which sends the stream to content with low load Delivery and storage function modules.
7. 根据权利要求 1至 3中任一项所述的方法， 其特征在于， 所述内容分发 与位置控制功能模块产生所述分发任务后向所述内容交付与存储功能模 块发送内容准备功能的流发送请求。 The method according to any one of claims 1 to 3, wherein the content distribution and location control function module sends the content preparation function to the content delivery and storage function module after generating the distribution task The stream sends the request.
8. 根据权利要求 7所述的方法， 其特征在于， 所述内容交付与存储功能模 块向所述内容分发与位置控制功能模块确认所述流请求消息。 8. The method of claim 7, wherein the content delivery and storage function module validates the flow request message to the content distribution and location control function module.
9. 根据权利要求 1至 3中任一项所述的方法，其特征在于，在所述步骤 S 108 之后，所述内容交付与存储功能模块中的内容交付功能模块接收媒体流。 The method according to any one of claims 1 to 3, characterized in that after the step S108, the content delivery function module in the content delivery and storage function module receives the media stream.
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