WO2010075813A1 - 一种流媒体数据传输方法、系统及服务器 - Google Patents

一种流媒体数据传输方法、系统及服务器 Download PDF

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Publication number
WO2010075813A1
WO2010075813A1 PCT/CN2010/000013 CN2010000013W WO2010075813A1 WO 2010075813 A1 WO2010075813 A1 WO 2010075813A1 CN 2010000013 W CN2010000013 W CN 2010000013W WO 2010075813 A1 WO2010075813 A1 WO 2010075813A1
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WO
WIPO (PCT)
Prior art keywords
data
streaming media
node
layer data
super
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Ceased
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PCT/CN2010/000013
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English (en)
French (fr)
Inventor
朱红儒
齐旻鹏
来学嘉
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China Mobile Communications Group Co Ltd
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China Mobile Communications Corp
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Publication of WO2010075813A1 publication Critical patent/WO2010075813A1/zh
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • 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
    • H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • 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
    • H04L65/80—Responding to QoS
    • 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
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234327—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into layers, e.g. base layer and one or more enhancement layers
    • 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
    • H04N21/631—Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols

Definitions

  • the present invention relates to a wireless IP/Internet service environment WiiSE network, and in particular, to a streaming media data transmission method, system and server. Background technique
  • WiiSE Wireless IP/Internet Service Environment
  • the network is currently a new conceptual telecommunication network. It is an all-IP distributed network.
  • the WiiSE network has a flat all-IP network structure and intelligence.
  • FIG. 1 is a schematic diagram of a currently proposed WiiSE core network.
  • the WiiSE core network is a distributed network, including a plurality of trusted nodes (also called super nodes, nodes deployed by the operators themselves) and other untrusted nodes respectively. It is a node of other heterogeneous networks. It consists of several P2P cascading networks (Mesh P2P), and each super node is a subnet representation of Mesh P2P. The super node and other untrusted nodes can be distributed in P2P mode. The transmission of business data.
  • Embodiments of the present invention provide a streaming media data transmission method, system, and server for solving streaming media transmission in a WiiSE network.
  • a streaming media data transmission method provided by an embodiment of the present invention is applied to a wireless IP/Internet service environment WiiSE network, including:
  • the layering the streaming media data includes:
  • the streaming media content data in the streaming media data into the layered media content data and the basic layer streaming media content data according to the quality of service QoS or the segmentation method of the streaming media segment; and the copyright information and the session key
  • the base layer streaming media content data is determined as the base layer data
  • the enhanced layer streaming media content data is determined to increase the number of layers.
  • the super nodes are transmitted to the user terminal according to the transmission mode of the client/server, and the method includes: the super nodes use the route recorded in the secure routing table according to the stored security routing table and the security user list.
  • the base layer data is sent to the user terminal in the secure user list.
  • the super nodes and the untrusted nodes are shared and transmitted to the user terminal according to the P2P transmission mode, including:
  • the super node or the untrusted node obtains the layer data and caches from other super nodes and/or other untrusted nodes in the core network by using P2P transmission;
  • the super nodes or untrusted nodes transmit the cached enhancement layer data to the user terminal.
  • An embodiment of the present invention further provides a streaming media data transmission system, including: a streaming media server, a super node, and an untrusted node;
  • the streaming media server is configured to layer the streaming media data into basic layer data and improve layer data; and transmit the base layer data to each super node; and transmit the enhanced layer data to each super node or not Letter node
  • the super node is configured to transmit the basic layer data to a user terminal according to a client/server transmission manner; and share the enhanced layer data and transmit with other super nodes and the untrusted node according to a P2P transmission manner.
  • the untrusted node is configured to share the enhanced layer data with other untrusted nodes and the super node according to a P2P transmission manner and transmit the data to the user terminal.
  • the streaming media server is further configured to extract copyright information and a session key included in the streaming media data, and divide the streaming media content data in the streaming media data according to a quality of service QoS or a segmentation of a streaming media segment.
  • QoS quality of service
  • the streaming media server is further configured to extract copyright information and a session key included in the streaming media data, and divide the streaming media content data in the streaming media data according to a quality of service QoS or a segmentation of a streaming media segment.
  • the super node is further configured to send the basic layer data to the user terminal in the secure user list by using a route that is recorded in the secure routing table according to the stored secure routing table and the security user list.
  • the super node is further configured to obtain the enhanced layer data from the other super nodes and/or the untrusted node in the core network by using the P2P transmission manner, and cache the cached layer data; and transmit the buffered enhanced layer data to the user terminal;
  • the untrusted node is further configured to obtain the enhanced layer data and cache from the other untrusted node and/or the super node by using the P2P transmission manner; and transmit the buffered enhanced layer data to the user terminal.
  • the embodiment of the invention further provides a streaming media server, including:
  • a layering module configured to layer the streaming media data into basic layer data and improve layer data
  • a transmission module configured to transmit the basic layer data to each super node in the core network according to a client/server transmission manner And to the user terminal; and sharing the enhanced layer data through the P2P transmission mode between the super nodes and/or the untrusted nodes in the core network and transmitting to the user terminal.
  • the layering module further includes:
  • a storage submodule configured to store streaming media data
  • An extraction submodule configured to extract copyright information and a session key included in the streaming media data; and a sub-module, configured to: stream media content data in the streaming media data according to a service shield quantity Qos or a streaming media Segmentation mode is divided into improving layered media content data and basic layer streaming media content data;
  • the streaming media data transmission method, system and server provided by the embodiments of the present invention perform layered processing on the streaming media data, and transmit the divided basic layer data to the user terminal according to the client/server manner through the super nodes in the core network.
  • the layer data is shared and transmitted to the client according to the P2P mode between the super nodes and the untrusted nodes in the core network.
  • the streaming media data transmission method, system and server provided by the embodiments of the present invention use the existing super nodes in the core network to implement the function of similar content distribution network end services, which not only reduces the delay of transmitting the base layer data transmission source to the end, but also ensures The security of the basic layer data transmission is reliable, and the distribution of the basic layer data can be realized by eliminating the need to deploy a large number of Content Delivery Network (CDN) servers, which has small changes to the network and is low in implementation cost.
  • CDN Content Delivery Network
  • the layer data is shared by each super node and the untrusted node according to the P2P manner, and the advantage of P2P for data transmission is fully utilized, thereby effectively balancing the network load and improving the network.
  • the network is more efficient, and it also provides users with a higher shield and faster streaming data playback experience.
  • 1 is a schematic structural diagram of an existing WiiSE core network
  • FIG. 2 is a flowchart of a method for transmitting streaming media data according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a network connection of a streaming media data transmission method according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a streaming media data transmission system according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a streaming media server according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a layering module in a streaming media server according to an embodiment of the present invention. detailed description
  • Step S201 The streaming media server layeres the streaming media data into basic layer data and enhanced layer data.
  • the streaming media server performs hierarchical processing on the original streaming media data, and the original streaming media data includes sensitive information and streaming media content data.
  • the original streaming media data includes sensitive information and streaming media content data.
  • MDC multiple description coding
  • the specific layering method is as follows:
  • the streaming media server first extracts the original streaming media data containing sensitive information (copyright information and session keys, etc.);
  • the streaming media server then divides the streaming media content data in the original streaming media data into higher layered media content data and basic layer streaming media content data according to the quality of service (QoS) or the segmentation of the streaming media segment.
  • QoS quality of service
  • the segmentation of the streaming media segment may be, but is not limited to, dividing the streaming media segment into a preview segment and a normal segment.
  • the preview segment may be a content segment selected by the streaming media provider from the original streaming media data for the user to preview the movie. And for ordinary fragments.
  • the streaming media content data with better visual quality is used as the enhanced streaming media content data, and the streaming media content data with lower visual quality is used as the basic layer streaming media content data; or, the streaming content of the common segment is The data is used to improve the streaming media content data, and the streaming media content data of the preview segment is used as the base layer streaming media content data.
  • the streaming media server determines the extracted copyright information, the session key, and the divided basic layer media content data as the base layer data; and determines the divided enhanced layer stream media content data as the higher layer data.
  • Step S202 The streaming media server transmits the basic layer data to each super node in the core network, and the super node transmits the data to the user terminal according to the transmission mode of the client/server.
  • a number of trusted nodes are deployed in the WiiSE core network, and for each super node, it receives streaming media transmission. After the basic layer data, it can be transmitted to the user terminal according to the existing client/server transmission method.
  • the super node in the embodiment of the present invention has a function similar to the end server in the CDN, that is, the streaming media can distribute the data of the basic layer through each super node deployed in the core network of the WiiSE.
  • the super node closest to the user end can not only reduce the source-to-end delay, but also improve the reliability of the transmission of the basic layer data (including sensitive information such as copyright information and session key) because the super nodes are trusted. .
  • the function of the existing super node can be improved accordingly, and the implementation is convenient and the cost is low.
  • the several routes recorded in the secure routing table ensure the authenticity of the user identity of the basic layer data transmission on the path of the basic layer data transmission.
  • the super node sends the base layer data to the user terminal in the secure user list through the route described in the secure routing table.
  • the supernode does not transmit any base layer data to it.
  • the supernode also needs to continuously update the contents of the maintained secure routing table and the secure user list based on the results of authentication and authentication.
  • Step S203 The streaming media server transmits the enhanced layer data to each super node and/or the untrusted node in the core network, and the super node and the untrusted node share and transmit to the user terminal according to the P2P transmission manner.
  • the streaming server may choose to transmit the enhanced layer data to the super nodes and/or untrusted nodes in the WiiSE core network.
  • each super node in the WiiSE core network and the untrusted node form a P2P mesh network, and the super node and the untrusted node can use P2P transmission mode for data sharing.
  • the super node or the untrusted node may initiate a request for obtaining the layer data to the other super node or the untrusted node, and obtain the corresponding layer data by using the P2P method, and then return the data to the user terminal, for example, when the user terminal is to the super node or not
  • the requesting node initiates the request for obtaining the streaming media data, and when the corresponding streaming media data is cached in the super node or the untrusted node, the super node or the untrusted node directly returns the cached layer of the cache to the user terminal;
  • the super node or the untrusted node may be other super nodes or untrusted.
  • the node initiates the request for obtaining the
  • the streaming server sends the number of layers to the WiiSE core network, even if no user terminal sends a request for obtaining streaming media data to each super node or untrusted node in the WiiSE core network.
  • the super-nodes and the untrusted nodes in the WiiSE core network also perform P2P data transmission with each other, and cache the obtained enhanced layer data.
  • the cached The layer data is updated back to the user terminal.
  • the streaming media server adopts the method of sharing the layer data and transmitting the data to the user by using the P2P transmission mode between the super nodes in the WiiSE core network and the untrusted nodes, fully utilizing the advantages of the P2P transmission mode, and effectively balancing the network.
  • the load increases the efficiency of the network, and also provides users with higher quality and faster streaming data playback experience.
  • Steps S102 and S103 in the streaming media data transmission method provided by the embodiment of the present invention are independent of each other, and there is no strict chronological order, and the steps are numbered only for the purpose of distinguishing.
  • FIG. 3 is a schematic diagram of a network connection of a streaming media data transmission method according to an embodiment of the present invention.
  • the solid line portion represents the base layer data
  • the dotted line portion represents the enhancement layer data.
  • the embodiment of the present invention further provides a streaming media data transmission system, as shown in FIG. 4, including: a streaming media server 401, a super node 402, and an untrusted node 403; among them:
  • the streaming media server 401 is configured to layer the streaming media data into basic layer data and improve Layer data; and transferring base layer data to each super node; and transmitting the enhancement layer data to each super node or untrusted node;
  • the super node 402 is configured to transmit the basic layer data to the user terminal according to the client/server transmission manner; and share the enhanced layer data with the other super nodes and the untrusted node according to the P2P transmission manner and transmit the data to the user terminal;
  • the untrusted node 403 is configured to share the enhanced layer data with other untrusted nodes and super nodes according to the P2P transmission mode and transmit the data to the user terminal.
  • the streaming media server 401 in the streaming media data transmission system provided by the embodiment of the present invention is further configured to extract the copyright information and the session key included in the streaming media data; and the streaming media content data in the streaming media data, according to the service shield quantity Qos High or low or streaming media segmentation (such as, but not limited to, dividing a streaming segment into a preview segment and a normal segment) into improved layered media content data and base layer streaming media content data; and copyright information, session key And the base layer streaming media content data is determined as the base layer data, and the layered stream media content data is determined to be the enhancement layer data.
  • the service shield quantity Qos High or low or streaming media segmentation such as, but not limited to, dividing a streaming segment into a preview segment and a normal segment
  • the base layer streaming media content data is determined as the base layer data
  • the layered stream media content data is determined to be the enhancement layer data.
  • the super node 402 in the streaming media data transmission system provided by the embodiment of the present invention is further configured to send the basic layer data to the security user by using the route recorded in the secure routing table according to the stored secure routing table and the security user list. User terminal in the list.
  • the super node 402 in the streaming media data transmission system provided by the embodiment of the present invention is also used to obtain the enhanced layer data and cache from other super nodes and/or untrusted nodes in the core network by using the P2P transmission manner;
  • the layer data is transmitted to the user terminal.
  • the untrusted node 403 in the streaming media data transmission system provided by the embodiment of the present invention is also used to obtain the enhanced layer data and cache from other untrusted nodes and/or super nodes by using P2P transmission; Transfer to the user terminal.
  • the embodiment of the present invention further provides a streaming media server, as shown in FIG. 5, including: a layering module 501 and a transmission module 502;
  • a layering module 501 configured to layer the streaming media data into basic layer data and improve layer data
  • the transmission module 502 is configured to: pass the basic layer data to each super node in the core network according to the client/ The transmission mode of the server is transmitted to the user terminal; and the enhancement layer data is shared and transmitted to the user terminal according to the P2P transmission mode between the super nodes and/or the untrusted nodes in the core network.
  • the layering module in the streaming media server provided by the embodiment of the present invention, as shown in FIG. 6, may further include: a storage submodule 601, an extracting submodule 602, a dividing submodule 603, and a determining submodule 604;
  • a storage submodule 601 configured to store streaming media data
  • the extraction sub-module 602 is configured to extract the copyright information and the session key included in the streaming media data.
  • the dividing sub-module 603 is configured to divide the streaming media content data in the streaming media data according to the quality of service QoS or the segmentation of the streaming media segment. Divided into improving layered media content data and basic layer streaming media content data;
  • the determining sub-module 604 determines the copyright information, the session key, and the base layer streaming media content data as the base layer data; and determines the enhanced layered media content data as the enhancement layer data.
  • the streaming media data transmission method, system and server provided by the embodiments of the present invention perform layered processing on the streaming media data, and transmit the divided basic layer data to the user terminal according to the client/server manner through the super nodes in the core network.
  • the layer data is shared and transmitted to the client according to the P2P mode between the super nodes and the untrusted nodes in the core network.
  • the streaming media data transmission method, system and server provided by the embodiments of the present invention use the existing super nodes in the core network to implement the function of similar content distribution network end services, which not only reduces the delay of transmitting the base layer data transmission source to the end, but also ensures The security of the basic layer data transmission is reliable, and the distribution of the basic layer data can be realized because a large number of CDN servers are no longer needed to be deployed, and the network modification is small, and the implementation is convenient and low in cost.
  • the layer data is shared by the super nodes and the untrusted nodes according to the P2P manner, and the advantages of P2P for data transmission are fully utilized, thereby effectively balancing the network load and improving the network.
  • the network is more efficient, and it also provides users with higher quality and faster streaming data playback experience.

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  • Engineering & Computer Science (AREA)
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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Information Transfer Between Computers (AREA)

Description

种流媒体数据传输方法、 系统及服务器 技术领域
本发明涉及无线 IP/互联网业务环境 WiiSE网络， 尤其涉及一种流媒体数 据传输方法、 系统及服务器。 背景技术
无线 IP/互联网业务环境（ Wireless IP/Internet Service Environment, WiiSE ) 网络目前是一种新的概念性的电信网络， 是一个全 IP的分布式网络， WiiSE 网络具有扁平化的全 IP网络结构、 智能异构网络接入体系和基于 P2P的分布 式通信和信息处理架构以及可管、 可控、 可运营的业务环境。
图 1是目前提出的 WiiSE核心网的示意图， WiiSE核心网是一种分布式 网络， 包括若干可信节点 （也叫超级节点 Super Node, 运营商自己部署的节 点）分别与其他不可信节点 （可能是其他异构网络的节点）組成若干个 P2P 层叠网 （Mesh P2P ) ，并且每个超级节点都是 Mesh P2P的子网代表， 超级节 点与其他不可信节点之间可以釆用 P2P方式进行分布式的业务数据的传输。
目前对于 WiiSE网络的流媒体传输， 还未提出相应的解决方案。 发明内容
本发明实施例提供了一种流媒体数据传输方法、 系统及服务器， 用以解 决 WiiSE网络中的流媒体传输。
本发明实施例提供的一种流媒体数据传输方法， 应用于无线 IP/互联网业 务环境 WiiSE网络， 包括：
对流媒体数据进行分层， 分为基本层数据和提高层数据；
将所述基本层数据传送至核心网中各超级节点， 由各超级节点按照客户 端 /服务器的传输方式传送至用户终端；
将所述提高层数据传送至核心网中各超级节点和 /或不可信节点， 由所述 各超级节点与不可信节点之间按照 P2P传输方式共享并传送至用户终端。 所述对流媒体数据进行分层， 包括：
提取所述流媒体数据包含的版权信息和会话密钥；
将所述流媒体数据中的流媒体内容数据， 按照服务质量 Qos的高低或者 流媒体片段划分方式分为提高层流媒体内容数据和基本层流媒体内容数据； 将所述版权信息、 会话密钥和基本层流媒体内容数据确定为基本层数据， 将所述提高层流媒体内容数据确定为提高层数椐。
所述各超级节点按照客户端 /服务器的传输方式传送至用户终端， 包括： 所述各超级节点根据存储的安全路由表以及安全用户列表， 通过所述安 全路由表中记栽的路由， 将所述基本层数据发送至所述安全用户列表中的用 户终端。
所述各超级节点和不可信节点之间按照 P2P传输方式共享并传送至用户 终端， 包括：
所述超级节点或不可信节点， 采用 P2P的传输的方式从核心网中其他超 级节点和 /或其他不可信节点获取提高层数据并緩存；
所述各超级节点或不可信节点将緩存的提高层数据传送至所述用户终 端。
本发明实施例还提供了一种流媒体数据传输系统， 包括： 流媒体服务器、 超级节点和不可信节点；
所述流媒体服务器， 用于对流媒体数据进行分层， 分为基本层数据和提 高层数据； 以及将基本层数据传送至各超级节点； 以及将所述提高层数据传 送至各超级节点或不可信节点；
所述超级节点， 用于将所述基本层数据按照客户端 /服务器的传输方式传 送至用户终端； 以及与其他超级节点和所述不可信节点按照 P2P的传输方式 共享所述提高层数据并传送至用户终端；
所述不可信节点， 用于与其他不可信节点和所述超级节点按照 P2P的传 输方式共享所述提高层数据并传送至用户终端。 所述流媒体服务器， 还用于提取所述流媒体数据包含的版权信息和会话 密钥； 将所述流媒体数据中的流媒体内容数据， 按照服务质量 Qos的高低或 者流媒体片段划分方式分为提高层流媒体内容数据和基本层流媒体内容数 据； 以及将所述版权信息、 会话密钥和基本层流媒体内容数据确定为基本层 数据， 将所述提高层流媒体内容数据确定为提高层数据。
所述超级节点还用于根据存储的安全路由表以及安全用户列表， 通过所 述安全路由表中记栽的路由， 将所述基本层数据发送至所述安全用户列表中 的用户终端。
所述超级节点， 还用于采用 P2P的传输的方式从核心网中其他超级节点 和 /或不可信节点获取提高层数据并緩存； 将緩存的提高层数据传送至所述用 户终端；
所述不可信节点， 还用于釆用 P2P的传输的方式从其他不可信节点和 /或 超级节点获取提高层数据并緩存； 将緩存的提高层数据传送至所述用户终端。
本发明实施例还提供了一种流媒体服务器， 包括：
分层模块， 用于对流媒体数据进行分层， 分为基本层数据和提高层数据； 传输模块， 用于将所述基本层数据通过核心网中各超级节点按照客户端 / 服务器的传输方式传送至用户终端； 以及将所述提高层数据通过所述核心网 中各超级节点和 /或不可信节点之间按照 P2P传输方式共享并传送至用户终 端。
所述分层模块， 还包括：
存储子模块， 用于存储流媒体数据；
提取子模块， 用于提取所述流媒体数据包含的版权信息和会话密钥； 划分子模块， 用于将所述流媒体数据中的流媒体内容数据， 按照服务盾 量 Qos的高低或者流媒体片段划分方式分为提高层流媒体内容数据和基本层 流媒体内容数据；
确定子模块， 将所述版权信息、 会话密钥和基本层流媒体内容数据确定 为基本层数据； 将所述提高层流媒体内容数据确定为提高层数据。 本发明实施例的有益效果如下：
本发明实施例提供的流媒体数据传输方法、 系统及服务器， 对流媒体数 据进行分层处理， 将划分的基本层数据通过核心网中的各超级节点按照客户 端 /服务器的方式传送至用户终端， 将提高层数据通过核心网各超级节点和不 可信节点之间按照 P2P方式共享并传送至用户端。 本发明实施例提供的流媒 体数据传输方法、 系统及服务器， 使用核心网中现有的超级节点实现类似内 容分发网络端服务的功能， 不仅减少了传输基本层数据传输源到端的延时， 保证了基本层数据传输的安全可靠性， 而且由于不再需要部署大量的内容分 发网络（ Content Delivery Network, CDN )服务器即可实现基本层数据的分发， 对网络改动小， 实施方便成本低。 另外， 由于本发明实施例中， 提高层数据 通过各超级节点和不可信节点之间按照 P2P方式进行共享的方式， 充分利用 了 P2P进行数据传输的优势， 有效地平衡了网络负栽， 提高了网络使用效率， 同时也为用户提供更高盾量以及速度更快的流媒体数据播放体验。 附图说明
图 1为现有 WiiSE核心网的结构示意图；
图 2为本发明实施例提供的流媒体数据传输方法流程图；
图 3为本发明实施例提供的流媒体数据传输方法网络连接示意图； 图 4为本发明实施例提供的流媒体数据传输系统结构示意图；
图 5为本发明实施例提供的流媒体服务器结构示意图；
图 6为本发明实施例提供的流媒体服务器中分层模块的结构示意图。 具体实施方式
下面结合附图， 用具体实施例对本发明提供的一种流媒体数据传输方法、 系统及服务器进行详细的说明。
本发明实施例提供的流媒体数据传输方法， 应用于无线 IP/互联网业务环 境 WiiSE网络。 如图 2所示， 包括以下步骤： 步骤 S201、 流媒体服务器对流媒体数据进行分层， 分为基本层数据和提 高层数据。
本步骤 S201中， 流媒体服务器将原始的流媒体数椐进行分层处理， 原始 的流媒体数据包括敏感信息和流媒体内容数据。 进行分层处理时， 例如可以 采用多重描述编码（ Multiple Description Coding, MDC )的方式对流媒体数据 进行分层。
具体分层的方法如下：
流媒体服务器先提取出原始流媒体数据中包含敏感信息 （版权信息和会 话密钥等）；
然后流媒体服务器将原始流媒体数据中的流媒体内容数据， 按照服务质 量（ Quality of Service, QoS ) 的高低或者流媒体片段划分方式分为提高层流 媒体内容数据和基本层流媒体内容数据， 其中， 根据流媒体片段划分方式可 以但不限于将流媒体片段划分为预览片段和普通片段， 预览片段可以为流媒 体提供商从原始流媒体数据中选取出的供用户进行影片预览的内容片段， 而 为普通片段。
具体来说， 就是将视觉质量较好的流媒体内容数据作为提高层流媒体内 容数据， 将视觉质量较低的流媒体内容数据作为基本层流媒体内容数据； 或者， 将普通片段的流媒体内容数据作为提高层流媒体内容数据， 将预 览片段的流媒体内容数据作为基本层流媒体内容数据。
流媒体服务器将提取出来的版权信息、 会话密钥和划分出的基本层流媒 体内容数据确定为基本层数据； 将划分出的提高层流媒体内容数据确定为提 高层数据。
步骤 S202、 流媒体服务器将基本层数据传送至核心网中各超级节点， 由 各超级节点按照客户端 /服务器的传输方式传送至用户终端。
从图 1所示的 WiiSE核心网的结构可以看出， WiiSE核心网中部署了若 干可信节点（也叫超级节点）， 对于每个超级节点来说， 其接收了流媒体传送 的基本层数据后， 就可以按照现有的客户端 /服务器的传输方法， 传送至用户 终端。
在本步骤 S202中， 本发明实施例中的超级节点， 具有类似 CDN中的端 服务器的功能， 也就是说， 流媒体可以通过部署在 WiiSE核心网中的各个超 级节点， 将基本层的数据分发至与用户端最近的超级节点， 不仅能够减小源 到端的延时， 而且由于超级节点都是可信任的， 提高了基本层数据（包括版 权信息、 会话密钥等敏感信息）传输的可靠性。 对现有的超级节点的功能进 行相应的改进即可， 实施方便且成本较低。
为了进一步地保证基本层数据传输的安全性， 在超级节点中， 还需要维 护安全路由表和安全用户列表。
安全路由表中记栽的若干路由保障了基本层数据传输的路径上的安全 了接收基本层数据的用户身份的真实可靠性。
超级节点通过安全路由表中记载的路由， 将基本层数据发送至安全用户 列表中的用户终端。 当未经过鉴权的用户终端向超级节点发起获取流媒体数 据的请求时， 超级节点不会将任何基本层数据传送给它。
超级节点还需要不断地根据认证和鉴权的结果， 对维护的安全路由表和 安全用户列表的内容进行更新。
步骤 S203、 流媒体服务器将提高层数据传送至核心网中各超级节点和 / 或不可信节点， 由所述各超级节点和不可信节点之间按照 P2P传输方式共享 并传送至用户终端。
流媒体服务器可以选择将提高层数据传送给 WiiSE核心网中的超级节点 和 /或不可信节点。
从图 1可以看出， WiiSE核心网中的各个超级节点分别和不可信节点之间 组成了 P2P Mesh网络，超级节点和不可信节点可以采用 P2P的传输方式进行 数据共享。
当用户终端向超级节点或者不可信节点发起获取流媒体数据的请求时， 超级节点或者不可信节点可以向其他超级节点或者不可信节点发起获取提高 层数据的请求， 采用 P2P方式获取到相应的提高层数据， 再返回给用户终端， 比如， 当用户终端向超级节点或者不可信节点发起获取流媒体数据的请求， 且当超级节点或者不可信节点中緩存有相应的流媒体数据时， 超级节点或者 不可信节点直接将自身緩存的提高层数椐返回至用户终端； 而当用户终端向 超级节点或者不可信节点发起获取流媒体数据的请求， 且超级节点或者不可 信节点中没有緩存对应的提高层流媒体数据时， 超级节点或者不可信节点可 向其他超级节点或者不可信节点发起获取提高层数据的请求， 采用 P2P方式 获取到相应的提高层数据， 再返回给用户终端。
或者对于某些热点资源， 在流媒体服务器将提高层数椐下发给 WiiSE核 心网后， 即使未有用户终端向 WiiSE核心网中的各个超级节点或不可信节点 发送获取流媒体数据的请求， WiiSE核心网中的各个超级节点和不可信节点之 间也相互进行 P2P方式的数据传输， 并将获取到的提高层数据进行緩存， 当 用户终端发起获取流媒体数据的请求时， 直接将緩存的提高层数据返回至用 户终端。
流媒体服务器采用了利用 WiiSE核心网中的各个超级节点分别和不可信 节点之间进行 P2P传输方式共享提高层数据再传送至用户端的方式， 充分利 用了 P2P传输方式的优点， 有效地平衡了网络负载， 提高了网络使用效率， 同时也为用户提供了更高质量以及速度更快的流媒体数据播放体验。
本发明实施例提供的流媒体数据传输方法中的步骤 S102和步骤 S103之 间相互独立， 没有严格的时间先后顺序， 仅为了区分而进行步骤的编号。
图 3 是本发明实施例提供的流媒体数据传输方法网络连接示意图。 图 3 中， 实线部分代表基本层数据， 虚线部分代表提高层数据。
根据本发明实施例提供的流媒体数据传输方法， 本发明实施例还提供了 一种流媒体数据传输系统， 如图 4所示， 包括： 流媒体服务器 401、 超级节点 402和不可信节点 403; 其中：
流媒体服务器 401， 用于对流媒体数据进行分层， 分为基本层数据和提高 层数据； 以及将基本层数据传送至各超级节点； 以及将提高层数据传送至各 超级节点或不可信节点；
超级节点 402， 用于将基本层数据按照客户端 /服务器的传输方式传送至 用户终端； 以及与其他超级节点和不可信节点按照 P2P的传输方式共享提高 层数据并传送至用户终端；
不可信节点 403 ,用于与其他不可信节点和超级节点间按照 P2P的传输方 式共享所述提高层数据并传送至用户终端。
本发明实施例提供的流媒体数据传输系统中的流媒体服务器 401，还用于 提取流媒体数据包含的版权信息和会话密钥； 将流媒体数据中的流媒体内容 数据， 按照服务盾量 Qos的高低或者流媒体片段划分方式（比如可以但不限 于将流媒体片段划分为预览片段和普通片段 )分为提高层流媒体内容数据和 基本层流媒体内容数据； 以及将版权信息、 会话密钥和基本层流媒体内容数 据确定为基本层数据， 将提高层流媒体内容数据确定为提高层数据。
本发明实施例提供的流媒体数据传输系统中的超级节点 402,还用于根据 存储的安全路由表以及安全用户列表， 通过安全路由表中记载的路由， 将所 述基本层数据发送至安全用户列表中的用户终端。
本发明实施例提供的流媒体数据传输系统中的超级节点 402,还用于采用 P2P 的传输的方式从核心网中其他超级节点和 /或不可信节点获取提高层数据 并緩存； 将緩存的提高层数据传送至用户终端。
本发明实施例提供的流媒体数据传输系统中的不可信节点 403 ,还用于采 用 P2P 的传输的方式从其他不可信节点和 /或超级节点获取提高层数据并緩 存； 将緩存的提高层数据传送至用户终端。
本发明实施例还提供了一种流媒体服务器， 如图 5所示， 包括： 分层模 块 501和传输模块 502;
分层模块 501 , 用于对流媒体数据进行分层， 分为基本层数据和提高层数 据；
传输模块 502, 用于将基本层数据通过核心网中各超级节点按照客户端 / 服务器的传输方式传送至用户终端； 以及将提高层数据通过所述核心网中各 超级节点和 /或不可信节点之间按照 P2P传输方式共享并传送至用户终端。
本发明实施例提供的流媒体服务器中的分层模块， 如图 6所示， 具体还 可以包括： 存储子模块 601、 提取子模块 602、 划分子模块 603和确定子模块 604;
存储子模块 601， 用于存储流媒体数据；
提取子模块 602， 用于提取流媒体数据包含的版权信息和会话密钥； 划分子模块 603， 用于将流媒体数据中的流媒体内容数据，按照服务质量 Qos 的高低或者流媒体片段划分方式分为提高层流媒体内容数据和基本层流 媒体内容数据；
确定子模块 604, 将版权信息、会话密钥和基本层流媒体内容数据确定为 基本层数据； 将提高层流媒体内容数据确定为提高层数据。
本发明实施例提供的流媒体数据传输方法、 系统及服务器， 对流媒体数 据进行分层处理， 将划分的基本层数据通过核心网中的各超级节点按照客户 端 /服务器的方式传送至用户终端， 将提高层数据通过核心网各超级节点和不 可信节点之间按照 P2P方式共享并传送至用户端。 本发明实施例提供的流媒 体数据传输方法、 系统及服务器， 使用核心网中现有的超级节点实现类似内 容分发网络端服务的功能， 不仅减少了传输基本层数据传输源到端的延时， 保证了基本层数据传输的安全可靠性， 而且由于不再需要部署大量的 CDN服 务器即可实现基本层数据的分发， 对网络改动小， 实施方便成本低。 另外， 由于本发明实施例中，提高层数据通过各超级节点和不可信节点之间按照 P2P 方式进行共享的方式， 充分利用了 P2P进行数据传输的优势， 有效地平衡了 网络负栽， 提高了网络使用效率， 同时也为用户提供更高质量以及速度更快 的流媒体数据播放体验。 发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种流媒体数据传输方法， 应用于无线 IP/互联网业务环境 WiiSE网 络， 其特征在于， 包括：
对流媒体数据进行分层， 分为基本层数据和提高层数据；
将所述基本层数据传送至核心网中各超级节点， 由各超级节点按照客户 端 /服务器的传输方式传送至用户终端；
将所述提高层数据传送至核心网中各超级节点和 /或不可信节点， 由所述 各超级节点与不可信节点之间按照 P2P传输方式共享并传送至用户终端。
2、如权利要求 1所述的方法，其特征在于，所述对流媒体数据进行分层， 包括：
提取所述流媒体数据包含的版权信息和会话密钥；
将所述流媒体数据中的流媒体内容数据， 按照服务质量 Qos的高低或者 流媒体片段划分方式分为提高层流媒体内容数据和基本层流媒体内容数据； 将所述版权信息、 会话密钥和基本层流媒体内容数据确定为基本层数据， 将所述提高层流媒体内容数据确定为提高层数据。
3、 如权利要求 1所述的方法， 其特征在于， 所述各超级节点按照客户端 /服务器的传输方式传送至用户终端， 包括：
所述各超级节点根据存储的安全路由表以及安全用户列表， 通过所述安 全路由表中记栽的路由 , 将所述基本层数据发送至所述安全用户列表中的用 户终端。
4、 如权利要求 3所述的方法， 其特征在于， 所述各超级节点和不可信节 点之间按照 P2P传输方式共享并传送至用户终端 , 包括：
所述超级节点或不可信节点， 采用 P2P的传输的方式从核心网中其他超 级节点和 /或其他不可信节点获取提高层数据并緩存；
所述各超级节点或不可信节点将緩存的提高层数据传送至所述用户终 端。
5、 一种流媒体数据传输系统， 其特征在于， 包括： 流媒体服务器、 超级 节点和不可信节点；
所述流媒体服务器， 用于对流媒体数据进行分层， 分为基本层数据和提 高层数据； 以及将基本层数据传送至各超级节点； 以及将所述提高层数据传 送至各超级节点或不可信节点；
所述超级节点， 用于将所述基本层数据按照客户端 /服务器的传输方式传 送至用户终端； 以及与其他超级节点和所述不可信节点按照 P2P的传输方式 共享所述提高层数据并传送至用户终端；
所述不可信节点， 用于与其他不可信节点和所述超级节点按照 P2P的传 输方式共享所述提高层数据并传送至用户终端。
6、 如权利要求 5所述的系统， 其特征在于， 所述流媒体服务器， 还用于 提取所述流媒体数据包含的版权信息和会话密钥； 将所述流媒体数据中的流 媒体内容数据， 按照服务盾量 Qos的高低或者流媒体片段划分方式分为提高 层流媒体内容数据和基本层流媒体内容数据； 以及将所述版权信息、 会话密 钥和基本层流媒体内容数据确定为基本层数据， 将所述提高层流媒体内容数 据确定为提高层数据。
7、 如权利要求 5所述的系统， 其特征在于， 所述超级节点还用于根据存 储的安全路由表以及安全用户列表， 通过所述安全路由表中记栽的路由， 将 所述基本层数据发送至所述安全用户列表中的用户终端。
8、 如权利要求 5所述的系统， 其特征在于， 所述超级节点， 还用于采用 P2P 的传输的方式从核心网中其他超级节点和 /或不可信节点获取提高层数据 并緩存； 将緩存的提高层数据传送至所述用户终端；
所述不可信节点， 还用于采用 P2P的传输的方式从其他不可信节点和 /或 超级节点获取提高层数据并緩存； 将緩存的提高层数据传送至所述用户终端。
9、 一种流媒体服务器， 其特征在于， 包括：
分层模块， 用于对流媒体数据进行分层， 分为基本层数据和提高层数据； 传输模块， 用于将所述基本层数据通过核心网中各超级节点按照客户端 / 服务器的传输方式传送至用户终端； 以及将所述提高层数据通过所述核心网 中各超级节点和 /或不可信节点之间按照 P2P传输方式共享并传送至用户终 10、 如权利要求 9所述的服务器， 其特征在于， 所述分层模块， 还包括: 存储子模块， 用于存储流媒体数据；
提取子模块， 用于提取所述流媒体数据包含的版权信息和会话密钥； 划分子模块， 用于将所述流媒体数据中的流媒体内容数据， 按照服务质 量 Qos的高低或者流媒体片段划分方式分为提高层流媒体内容数据和基本层 流媒体内容数据；
确定子模块， 将所述版权信息、 会话密钥和基本层流媒体内容数据确定 为基本层数据； 将所述提高层流媒体内容数据确定为提高层数据。
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