WO2011015015A1 - 内容上行方法及内容交付功能实体 - Google Patents

内容上行方法及内容交付功能实体 Download PDF

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Publication number
WO2011015015A1
WO2011015015A1 PCT/CN2009/075788 CN2009075788W WO2011015015A1 WO 2011015015 A1 WO2011015015 A1 WO 2011015015A1 CN 2009075788 W CN2009075788 W CN 2009075788W WO 2011015015 A1 WO2011015015 A1 WO 2011015015A1
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WIPO (PCT)
Prior art keywords
function entity
control function
content
cdn
session
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PCT/CN2009/075788
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English (en)
French (fr)
Inventor
夏宏飞
Original Assignee
中兴通讯股份有限公司
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
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US13/257,841 priority Critical patent/US20120124631A1/en
Priority to EP09847993.4A priority patent/EP2448260B1/en
Publication of WO2011015015A1 publication Critical patent/WO2011015015A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/239Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
    • H04N21/2393Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10Architectures or entities
    • H04L65/1016IP multimedia subsystem [IMS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/61Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/06Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a content uplink method and a content delivery function entity. Background technique
  • the interactive network television also known as the Internet Protocol Television (IPTV) refers to the general name of the equipment for providing live, on-demand and time-shifted broadcasts of TV programs capable of supporting interactive functions through the IP bearer network.
  • IPTV Internet Protocol Television
  • the number of IPTV users has been increasing, which has placed higher demands on system performance and reliability.
  • the internal modules of the content interaction network are required to have clear functional responsibilities, content distribution and business processes are clean and reliable.
  • the IPTV standard is based on the Next Generation Network (NGN) IP Multimedia Subsystem (IMS) and NGN non-IMS architecture, which can provide users with on-demand, live broadcast, video recording and some new services.
  • NGN Next Generation Network
  • IMS IP Multimedia Subsystem
  • NGN non-IMS architecture which can provide users with on-demand, live broadcast, video recording and some new services.
  • the Content Delivery Network (CDN) in the IPTV architecture plays an important role in the Quality of Experience (QoE) protection and system stability in the IPTV system.
  • QoE Quality of Experience
  • the important functional entities within the CDN are mainly used to implement content location technology, scheduling and storage functions.
  • the content distribution network only refers to the service of the content provided by the service provider to the user, and does not involve the service generated by the user, such as the content generated by the user, which also needs the guarantee of quality of service (QoS (QoS)/QoE).
  • QoS quality of service
  • the current CDN content upload/upstream based on user-generated content does not have QoS/QoE guarantee.
  • the present invention provides a content uplink method and a content delivery function entity, with quality problems.
  • a content uplink method for uplinking a content upload or media stream generated by a user equipment (UE) to one or more CDN nodes of a CDN.
  • UE user equipment
  • the content uplink method includes: after receiving a session initialization request for requesting content upload or media stream uplink, the CDN control function entity allocates one or more CDN nodes and controls the functional entity to one or more CDN nodes.
  • a content distribution network is also provided.
  • the content distribution network comprises: a CDN control function entity and one or more CDN nodes.
  • the CDN control function entity includes: a first receiving module, a first selecting module, and a first sending module.
  • the first receiving module is configured to receive a session initialization request for requesting content upload or media stream uplink by the user equipment, where the first selecting module is configured to be used according to loading information of one or more CDN nodes and/or a session initialization request.
  • the area information is allocated to one or more CDN nodes; the first sending module is configured to send a session request to the cluster control function entity of the one or more CDN nodes allocated by the first selection module.
  • each CDN node comprises: a cluster control function entity and at least one content delivery function entity.
  • the cluster control function entity includes: a second receiving module, a second selecting module, a session establishing module, and a second sending module.
  • the second receiving module is configured to receive the CDN control function. a session request sent by the body; a second selection module, configured to select a content delivery function entity according to load status information of each content delivery function entity in the CDN node where the cluster control function entity is located; a session establishment module, configured to establish a cluster control function And the second sending module is configured to send the attribute information of the session established by the session establishing module to the user equipment.
  • the content delivery function entity is configured to receive a media file uploaded by the user equipment or an uplink media stream.
  • a CDN node that saves the uplink content of the user equipment is selected by the CDN control function entity, and a content upload or a media stream uplink session is established by the cluster control entity inside the CDN node and the content delivery function entity.
  • the content uploading or media stream generated by the user equipment is uplinked to the content delivery function entity of the CDN node, so that other features and advantages of the present invention will be set forth in the following description, and will be partially apparent from the description, or It is understood by practicing the invention.
  • the objectives and other advantages of the invention will be realized and attained by the ⁇ RTI DRAWINGS
  • FIG. 1 is a schematic structural diagram of an NGN-based IPTV system according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a content uploading method according to an embodiment of the present invention
  • Figure 3 is a flow chart of the first embodiment
  • Figure 4 is a flow chart of the second embodiment
  • FIG. 5 is a schematic structural diagram of a content distribution network according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a solution that can support user to generate content upload.
  • the IPTV service control function entity and/or the service control function entity when the user equipment needs to uplink the content, sends a session request to the CDN control function entity to request uploading content or an uplink media stream; the CDN control function entity After receiving the session request, selecting one or more CDN nodes that need to save the content that the user equipment is about to upload, and sending a session request to the cluster control function entity of the selected one or more CDN nodes, receiving the cluster of the session request.
  • the control function entity selects a content delivery function entity in the CDN node where it is located, and establishes a session with the content delivery function entity to upload or uplink content of the user equipment, through which the user equipment uploads or uplinks the content generated by the user equipment to Content delivery functional entity.
  • upstream is also referred to as a media stream.
  • Upstream means that the user equipment streams the content and sends the code stream to the content delivery function entity and caches or saves it.
  • Content upload refers to the upload of media files from user devices to content delivery functional entities. Hehe.
  • an NGN-based IPTV system to which the embodiments of the present invention are applied is introduced before the technical solutions provided by the embodiments of the present invention are described.
  • FIG. 1 is a schematic structural diagram of an NGN-based IPTV system according to an embodiment of the present invention.
  • the NGN-based IPTV system mainly includes: User Equipment (UE) 11 , which is called End-User Functions and Service Control Function (ITU) in ITU-T International Standards Organization. Function, the cylinder is called SCF, if IMS in NGN, The core IMS-core IMS 12, IPTV Service Control Functions (IPTV SCF) 13, sometimes referred to as IPTV Application Functions (IPTV), content distribution network (Content Delivery) Network, CDN) 14, sometimes referred to as Content Delivery and Storage in NGN networks.
  • the CDN 14 may further include: a CDN (master) controller or a CDN control function entity (Content Delivery & Storage Control Functions / Content Delivery
  • CD&SCF/CDNCF/CD&LCF 15 Cluster Control Function or Content Distribution & Delivery & Location Control Functions (CCF or CD&D&LCF) 16 and Content Delivery Function or Content Delivery and Storage Function (CDF) Or CD&SF) 17.
  • CDN nodes (1, 2 ⁇ . ⁇ ) may contain one cluster control function entity 16 and one or more content delivery function entities 17 .
  • the CDN node (which may also be called a cluster cluster) is not limited to the above CDN node 1 and CDN node 2 (shown in the figure), and may be plural.
  • the UE 11 may be a mobile phone with mobile capability, a set top box for a fixed network, a software-based soft terminal that implements a set-top box function, and a functional entity such as a home gateway.
  • the UE can implement IPTV services such as on-demand and live broadcast by interacting with the information of the user.
  • the SCF 12 is connected to the UE 11, and is used as a set of main functional entities of the NGN service control layer, and is mainly used for session control, service authentication, authentication, and accounting.
  • this entity is Core IMS.
  • Core IMS is mainly used to provide a SIP-based session control mechanism for authenticating and authenticating IPTV terminal users, requesting resource admission control subsystems for resource allocation, and so on.
  • the Core IMS performs SIP sessions by interacting with the IPTV terminal, the IPTV application function entity, and the content distribution function entity to perform functions such as security, QoS, charging, and roaming.
  • IPTV SCF 13 through Session Initiation Protocol (SIP)
  • SIP Session Initiation Protocol
  • the SCF 12 is connected to provide service authentication when the session is initiated or modified.
  • the functions include: checking user information, checking whether the user can legally use the selected content, credit restriction and credit control, and providing preliminary information for system selection.
  • the IPTV SCF 13 is an IPTV SIP application server in the case of an IMS network, which corresponds to a set of IPTV Control and IPTV Application in the Open IPTV Forum standard organization, corresponding to the IPTV Application Functions and application support in the ITU-T standard. Application Support Functions and Service Support Functions.
  • CDN 14 connected to the UE through the Xc and Xd interfaces, where the Xc interface is connected
  • the UE is configured to control the media stream according to the Real Time Streaming Protocol (RTSP), and connect the UE through the Xd interface for transmitting and mediating the media stream RTP (using the HTTP (Hypertext Transfer Protocol) protocol).
  • RTSP Real Time Streaming Protocol
  • HTTP Hypertext Transfer Protocol
  • the CDN control function entity 15 completes the selection of the cluster control function entity 16. Usually, there may be one or more functional entities in a CDN network, and the CDN control function entities 15 need to interact with each other to perform the cluster control function entity 16. select. It mainly includes Location Control Functions and Distribution Control Functions. The location control function is responsible for selecting the requested content to locate the appropriate CDN node. The distribution control function is responsible for content distribution (content injection, content scheduling, aging). Etc.) Control.
  • the cluster control function entity 16 which interacts with the message between the UE and the content delivery function entity 17, maintains the state of the content delivery function entity 17 and handles its interaction with it, and it also terminates the establishment of the IPTV service session. It mainly includes Location Control Functions and Distribution Control Functions and Content Delivery Functions.
  • the location control function is responsible for selecting the requested content to be targeted to the appropriate content delivery function entity 17, and the distribution control function is responsible for content distribution (content injection, Content scheduling, aging, etc.) to the control of the specific content delivery functional entity 17.
  • Content delivery control is primarily responsible for the control of the RTSP media stream.
  • the content delivery functional entity 17 responsible for media processing, delivery (unicast or multicast) and content distribution, storage functions.
  • the C21/C22 interface (RTSP interface), through which the user cluster control function entity 16 media controls the content delivery function entity 17.
  • the C11/C12 interface (control interface) is implemented by using the SIP protocol.
  • the CDN control function entity 15 determines that other CDN node information of the content uploading service can be provided.
  • the CDN node can also report the nodes to the CDN control function entity 15 through the interface. Service status information, etc.
  • a content uploading method is first provided, which is used for uploading content generated by a user equipment to one or more CDN nodes of a content distribution network, or uploading a user equipment to generate a media stream to content distribution.
  • One or more CDN nodes of the network are first provided, which is used for uploading content generated by a user equipment to one or more CDN nodes of a content distribution network, or uploading a user equipment to generate a media stream to content distribution.
  • One or more CDN nodes of the network is first provided, which is used for uploading content generated by a user equipment to one or more CDN nodes of a content distribution network, or uploading a user equipment to generate a media stream to content distribution.
  • a content uploading method mainly includes the following steps (step S201 - step S205):
  • Step S201 After receiving the request for content upload or the session initialization request of the media stream uplink, the CDN control function entity allocates one or more CDN nodes, and sends a session request to the cluster control function entity of the one or more CDN nodes;
  • Step S203 The cluster control function entity that receives the session initialization request establishes a content upload or media stream uplink session with the selected content delivery function entity, and returns the established session confirmation information to the CDN control function entity.
  • Step S205 The CDN control function entity returns the received confirmation information to the user equipment, and the user equipment uploads the content according to the received confirmation information or uplinks the media stream to the content delivery function entity selected by each cluster control function entity.
  • the session initialization request sent by the user equipment includes: requesting content A session initialization request for uploading (ie, uploading of a media file) and a session initialization request for requesting media stream uplink (ie, uplink, UE sends the media stream to the CDN by means of RTSP), for the uplink of the two contents, the present invention
  • a session initialization request for uploading ie, uploading of a media file
  • a session initialization request for requesting media stream uplink ie, uplink, UE sends the media stream to the CDN by means of RTSP
  • the user equipment requests the uploading of the media file, and may be uploaded by using a file transfer protocol such as FTP (File Transfer Protocol)/HTTP.
  • the cluster control function entity returns the path information of the content delivery function entity of the media file uploaded by the user equipment to the CDN control function entity.
  • the path information may include: an IP address of the content delivery function entity. And port information, etc.
  • FIG. 3 is a flowchart of uploading a media file by a user equipment in the embodiment. As shown in FIG. 3, the process of uploading a media file by the user equipment mainly includes the following steps:
  • Step 301 The user equipment sends a session request (SIP INVITE) for uploading the media file to the service control function entity and/or the IPTV service control function entity.
  • SIP INVITE session request
  • the UE may upload the media file by using a file transfer protocol such as FTP/HTTP.
  • a file transfer protocol such as FTP/HTTP.
  • the UE the IPTV service control function entity, the service control function entity, and the resource and the admission control function entity (RACS or RACF) are involved, where the service control function and resources are The reservation operation of the resource will be involved between the admission control functions.
  • the admission control function entity (RACS or RACF)
  • the session request may carry one of the following information or any combination thereof: uploaded content identifier information, content description information, size information of the media file, and the like.
  • the session request may use the SIP (Session Initiation Protocol) protocol to store the related information in the SDP (Session Description Protocol) for transmission.
  • SIP Session Initiation Protocol
  • SDP Session Description Protocol
  • the session initialization request may carry information of a specific area, and is used to indicate that the CDN control function selects a CDN node of the specific area, or may not carry information of a specific area in the session initialization request, that is,
  • the range of CDN nodes selected by the CDN control function is not limited.
  • Step 303 The CDN control function entity that receives the session initialization request of the media file upload determines that the media file needs to be saved according to the load information of each CDN node managed by the CDN node and the received session initialization request. One or more CDN nodes for media content).
  • the selection of the CDN node 1 is taken as an example.
  • the specific operation is similar to the operation of selecting a CDN node.
  • Step 304 The CDN control function entity forwards the session initialization request uploaded by the media file to the cluster control function of the selected CDN node 1;
  • Step 305 The cluster control function selects a content delivery function of the CDN node where it is located and establishes a session for uploading the media file with the same;
  • the cluster control function can select a content delivery function based on information such as load status information of the content delivery function.
  • the media control function entity and the content delivery function entity establish a media file upload session may include the following steps:
  • Step 1 The cluster control function sends a content uploading request to the selected content delivery function.
  • Step 2 The content delivery function entity receives the content uploading request, and sends a content uploading response message to the cluster control function, where the response message carries Confirmation information that can be uploaded and path information that can store the media file;
  • Step 3 the cluster control function is based on the above received from the CDN control function entity
  • the media file size information carried in the session initialization request determines the resource information required for the uploading of the media file, and includes the bandwidth information to be allocated, and the like.
  • step 3 can be performed before steps 1 and 2.
  • Step 306 the cluster control function sends a response message to the CDN control function, where the response message carries the path information of the content delivery function entity that saves the media file uploaded by the user equipment, that is, the IP address, the port, and the like, optionally, Carrying bandwidth information required for uploading media files, etc.
  • Step 307 The CDN control function entity forwards the response message of the information carried in the received response message to the IPTV service control function or the service control function by using the media file uploading.
  • Step 308 The IPTV service control function or the service control function passes the foregoing information.
  • the upload response message is returned to the UE, and when the operation of step 308 is performed, the operation of submitting resources such as bandwidth reserved by the service control function in step 301 above is performed;
  • Step 309 The UE that receives the upload response message performs file transfer such as FTP or HTTP with the corresponding content delivery function entity according to the IP address and port information, and uploads the media content in the UE to the content delivery function.
  • file transfer such as FTP or HTTP
  • the user equipment requests the media stream to go up.
  • the cluster control function entity returns the session identifier information of the RTSP to the CDN control function entity.
  • the flow of the uplink of the user equipment mainly includes the following steps:
  • Step 401 The UE sends a session request (SIP INVITE) of the upstream stream to the IPTV service control function entity or the service control function entity.
  • SIP INVITE session request
  • the session request will involve the UE, the IPTV service control function entity, the service control function entity, and the interaction of the resource with the admission control function entity (RACS or RACF), wherein the resource between the service control function and the resource and admission control function will be involved.
  • Reserve operation Specifically, the session request may carry the uplink content identifier information, the content description information, the code stream size information of the media content, and the like.
  • the session request can use the SIP protocol, and the related information is saved in the SDP for transmission.
  • Step 402 The IPTV service control function or the service control function sends an upstream session initialization request to the CDN control function entity.
  • Step 403 The CDN control function entity that receives the upstream session initialization request determines whether to save one of the media streams uploaded by the UE according to the load information of each CDN node that is managed and whether the requested SDP carries the information of the specific area.
  • a CDN node is selected as an example in the following steps, and the operations are similar for other selected CDN nodes;
  • Step 404 The CDN control function entity forwards the upstream session initialization request to the cluster control function entity of the selected CDN node;
  • Step 405 The cluster control function entity selects a content delivery function entity and establishes an upstream session with the content, and may specifically select according to information such as a load status of the content delivery function entity. Specifically, the cluster control function entity establishes a session with the content delivery function entity. Includes the following steps:
  • Step 1 The cluster control function entity sends an upstream query request (RTSP DESCRIBE message) to its selected content delivery function entity;
  • RTSP DESCRIBE message an upstream query request
  • Step 2 The content delivery function returns a response message to the cluster control function, where the response message may carry the media path information of the uplink, that is, the IP address, the port, and the like;
  • Step 3 The cluster control function entity sends a media channel setup message (RTSP SETUP) to the content delivery function entity;
  • RTSP SETUP media channel setup message
  • Step 4 The content delivery function entity receives the media channel setup message, and sends a media channel establishment success confirmation message to the cluster control function entity, where the acknowledgement message carries the RTSP session identifier information, that is, the RTSP Session ID.
  • Step 5 The cluster control function entity determines the resource information allocated to the upstream stream of the file according to the information such as the size of the code stream carried in the session initialization request of the received upstream (for example, information such as HD, SD, etc.), where Allocated bandwidth information, etc.
  • the above step 5 can be performed before the above steps 1, 2, 3 and 4.
  • Step 406 The cluster control function sends a response message to the CDN control function, where the response message includes resource identifier information such as session identifier information and bandwidth of the established RTSP.
  • resource identifier information such as session identifier information and bandwidth of the established RTSP.
  • Step 407 The CDN control function entity forwards the information carried in the received response message to the IPTV service control function entity or the service control function entity.
  • Step 408 the IPTV service control function entity or the service control function entity returns the information received in the foregoing step 407 to the UE, and may be returned to the UE through an uplink response message.
  • step 401 the operation of submitting resources such as the bandwidth reserved by the service control function in step 401 is performed.
  • Step 409 uplinking from the UE to the content delivery function.
  • the UE that receives the response message performs the following steps according to the information carried in the message:
  • Step 1 The UE sends an RTSP RECORD request to the cluster control function entity to request recording content, where the request carries the received session identifier of the RTSP.
  • Step 2 The cluster control function entity requests RTSP from the content delivery function entity. RECORD, requesting a recording;
  • Step 3 The content delivery function entity sends a confirmation message to the cluster control function entity, and the recording is about to be performed;
  • Step 4 The cluster control function entity sends an acknowledgement message to the UE, that is, recording is performed, and the uplink is from the UE to the content delivery function entity.
  • the content uploading method provided by the embodiment of the present invention can implement uploading of user generated content.
  • a content distribution network is also provided.
  • FIG. 5 is a schematic structural diagram of a content distribution network according to an embodiment of the present invention.
  • a content distribution network according to an embodiment of the present invention mainly includes: a CDN control function entity 1 and one or more CDN nodes 3 (in the figure) A CDN node is shown).
  • the CDN control function entity may include: a first receiving module 11, a first selecting module 13, and a first transmitting module 15.
  • the first receiving module 11 is configured to receive a session initialization request for requesting content upload or media stream uplink;
  • the first selecting module 13 is connected to the first receiving module 11 for loading information according to one or more CDN nodes 3 and And/or one or more CDN nodes are allocated to the area information carried in the session initialization request;
  • the first sending module 15 is connected to the first selecting module 11 for one or more CDN nodes allocated to the first selecting module 11
  • the cluster control function entity sends a session request;
  • each CDN node 3 there are: a cluster control function entity 31 and at least one content delivery function entity 33 (only one is shown in the figure for convenience of illustration).
  • the cluster control function entity 31 may include: a second receiving module 311, a second selecting module 313, a session establishing module 315, and a second sending module 317.
  • the second receiving module 311 is configured to receive a session request sent by the CDN control function entity 1;
  • the second selecting module 313 is connected to the second receiving module 311, and configured to deliver each content in the CDN node where the cluster control function entity is located.
  • the load status information of the function entity 33 selects a content delivery function entity;
  • the session establishment module 315 is connected to the second selection module 313 for establishing a session between the cluster control function entity and the content delivery function entity 33 selected by the second selection module 313;
  • the second sending module 317 is connected to the session establishing module 315, and is configured to send the confirmation information of the session established by the session establishing module 317 to the user equipment.
  • the content delivery function entity 33 is connected to the cluster control function entity 31 and the user equipment, and is configured to receive the content uploaded by the user equipment or the uplink media stream.
  • the CDN control function entity selects a CDN node that saves data uploaded by the user equipment, and establishes a session for uploading data through the cluster control entity inside the CDN node and the content delivery function entity.
  • the content generated by the user equipment can be uploaded to the content delivery function entity of the CDN node, so that the content distribution network in the next generation network can support the user to generate content, thereby providing more new services for the user, thereby improving the user experience. Improve the competitiveness of service providers.

Abstract

本发明公开了一种内容上行方法及内容交付功能实体。上述方法用于将UE产生的内容上传或者媒体流上行至CDN的一个或多个CDN节点,包括:CDN控制功能实体在接收到请求内容上传或者媒体流上行的会话初始化请求后,分配一个或多个CDN节点,并向一个或多个CDN节点的群集控制功能实体发送会话请求;接收到会话请求的群集控制功能实体与其选择的内容交付功能实体建立内容上传或者媒体流上行的会话,并将会话的确认信息返回给CDN控制功能实体;CDN控制功能实体将接收到的确认信息返回给UE,UE根据该确认信息将内容上传或将媒体流上行至内容交付功能实体。根据本发明,下一代网络中的内容分发网络可以支持用户产生内容。

Description

内容上行方法及内容交付功能实体 技术领域
本发明涉及移动通信技术领域, 尤其涉及一种内容上行方法及内容交 付功能实体。 背景技术
交互式网络电视, 又称为互联网十办议电视 ( Internet Protocol Television , IPTV ), 是指通过 IP承载网络向用户提供能够支持交互能力的电视节目的 直播、 点播和时移播放等业务的设备总称。 随着 IPTV的发展, IPTV的用 户数量不断增加, 从而对系统性能和可靠性等方面提出了更高的要求。 其 中, 对于交互式网络的内容交付功能, 为了减少系统各个部分之间的交互, 要求内容交互网络的内部模块功能职责明晰, 内容分发及业务流程筒洁和 可靠。
目前, IPTV标准以下一代网络(Next Generation Network, NGN ) IP 多媒体子系统( IP Multimedia Subsystem, IMS )和 NGN 非 IMS两种架构 为主, 能为用户提供点播、 直播、 录像及一些新业务。
IPTV架构中内容分发网络( Content Delivery Network, CDN )在 IPTV 系统中的服务质量( Quality of Experience , QoE )保障方面及系统稳定性等 方面起着重要作用。 CDN内部各重要功能实体主要用于实现内容定位技术、 调度及存储的功能。
目前, 内容分发网络只涉及服务商向用户提供的内容的业务, 而不涉 及用户产生的内容等需要实时上传的业务, 这些业务同样需要服务质量 ( QoS ( Quality of Service ) /QoE )的保障。 但目前的 CDN中, 基于用户产 生的内容等内容上传 /上行流并没有 QoS/QoE保障。 发明内容
有鉴于此, 本发明提供了一种内容上行方法及内容交付功能实体, 用 质量的问题。
根据本发明的一个方面, 提供了一种内容上行方法, 该方法用于将用 户设备 ( UE )产生的内容上传或者媒体流上行至 CDN的一个或多个 CDN 节点。
根据本发明的内容上行方法包括: CDN控制功能实体在接收到请求内 容上传或者媒体流上行的会话初始化请求后, 分配一个或多个 CDN节点, 并向一个或多个 CDN节点的群集控制功能实体发送会话请求;接收到会话 请求的群集控制功能实体与其选择的内容交付功能实体建立内容上传或者 媒体流上行的会话, 并将会话的确认信息返回给 CDN控制功能实体; CDN 控制功能实体将接收到的确认信息返回给 UE, UE根据该确认信息将内容 上传或将媒体流上行至内容交付功能实体。
根据本发明, 还提供了一种内容分发网络。
根据本发明的内容分发网络包括: CDN控制功能实体和一个或多个 CDN节点。 其中, CDN控制功能实体, 包括: 第一接收模块、 第一选择模 块、 第一发送模块。 其中, 第一接收模块, 用于接收用户设备请求内容上 传或媒体流上行的会话初始化请求; 第一选择模块, 用于根据一个或多个 CDN节点的负载信息和 /或会话初始化请求中携带的区域信息,分配一个或 多个 CDN 节点; 第一发送模块, 用于向第一选择模块分配的一个或多个 CDN节点的群集控制功能实体发送会话请求。 一个或多个 CDN节点, 其 中,每个 CDN节点包括:群集控制功能实体和至少一个内容交付功能实体。 其中, 群集控制功能实体, 包括: 第二接收模块、 第二选择模块、 会话建 立模块、 第二发送模块。 其中, 第二接收模块, 用于接收 CDN控制功能实 体发送的会话请求;第二选择模块,用于根据群集控制功能实体所在的 CDN 节点中各个内容交付功能实体的负载状态信息, 选择一个内容交付功能实 体; 会话建立模块, 用于建立群集控制功能实体与第二选择模块选择的内 容交付功能实体的会话; 第二发送模块, 用于将会话建立模块建立的会话 的属性信息发送给用户设备。 内容交付功能实体, 用于接收用户设备上传 的媒体文件或上行的媒体流。
通过本发明的上述至少一个方案,通过 CDN控制功能实体选择保存用 户设备上行的内容的 CDN节点, 并通过 CDN节点内部的群集控制实体与 内容交付功能实体建立内容上传或媒体流上行的会话, 可以将用户设备产 生的内容上传或媒体流上行至 CDN节点的内容交付功能实体,从而使得下 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
图 1为根据本发明实施例的基于 NGN的 IPTV系统的结构示意图; 图 2为根据本发明实施例的内容上传方法的流程图;
图 3为实施例一的流程图;
图 4为实施例二的流程图;
图 5为根据本发明实施例的内容分发网络的结构示意图。 具体实施方式
由于目前的内容分发网络只涉及服务商向用户提供的内容业务的 QoS/QoE, 而不涉及用户产生的内容等需要实时上传业务的 QoS/QoE, 实 际上, 这些业务同样也需要 QoS/QoE保障, 因此, 本发明实施例提供了一 种可以支持用户产生内容上传的方案。 在本发明实施例中, 用户设备在需 要将内容上行时, 通过 IPTV服务控制功能实体和 /或业务控制功能实体向 CDN控制功能实体发送会话请求,请求上传内容或上行媒体流; CDN控制 功能实体在接收到该会话请求后, 选择需要保存用户设备将要上传的内容 的一个或多个 CDN节点, 并向选择的一个或多个 CDN节点的群集控制功 能实体发送会话请求, 接收到会话请求的群集控制功能实体选择其所在 CDN节点内的内容交付功能实体, 并与该内容交付功能实体建立用户设备 上传或上行流的内容的会话, 通过该会话, 用户设备将其产生的内容上传 或上行流至内容交付功能实体。
在本发明的实施例中, 上行流( Upstreaming )也称为媒体流。 上行是 指用户设备将内容进行流化并将该码流发送到内容交付功能实体中, 并进 行緩存或者保存。 内容上传则指的是媒体文件从用户设备上传到内容交付 功能实体中。 合。
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。
为了便于理解本发明实施例提供的技术方案, 在对本发明实施例提供 的技术方案进行说明之前, 对本发明实施例应用的基于 NGN的 IPTV系统 进行介绍。
图 1为根据本发明实施例的基于 NGN的 IPTV系统的结构示意图。 如 图 1所示, 基于 NGN的 IPTV系统主要包括: 用户设备 ( User Equipment, UE ) 11 , 在 ITU - T国际标准组织中称为用户功能( End-User Functions )、 业务控制功能实体( Service Control Function,筒称 SCF,如果在 NGN中 IMS , 则为核心 IMS - core IMS )12、 IPTV服务控制功能实体( IPTV Service Control Functions , IPTV SCF )13 ,有时也称为 IPTV应用功能实体( IPTV Application Functions , 筒称 IPTVAF )、 内容分发网络( Content Delivery Network, CDN ) 14, 在 NGN 网络中有时候也称为内容分发和存储 ( Content Delivery and Storage )。 其中, CDN 14进一步可以包括: CDN (主 )控制器或 CDN控制 功能实体 ( Content Delivery & Storage Control Functions /Content Delivery
CD&SCF/CDNCF/CD&LCF )15 ,群集控制功能实体( Cluster Control Function 或 Content Distribution &Delivery & Location Control Functions , 筒称为 CCF 或 CD&D&LCF ) 16以及内容交付功能实体( Content Delivery Function或 Content Delivery and Storage Function, CDF或 CD&SF ) 17。 其中一个 CDN 节点 (1 , 2 ··. η )可以包含 1个群集控制功能实体 16和一个或多个内容交 付功能实体 17。 其中, 在具体应用中, CDN节点 (也可以叫集群 Cluster ) 并不限于上述 CDN节点 1和 CDN节点 2 (图中所示), 可以为多个。
以下分别描述基于 NGN的 IPTV系统的各实体及接口。
UE 11 , 具体地, 可以为具有移动能力的手机、 固定网络的机顶盒、 实 现机顶盒功能的基于软件实现的软终端, 还包括家庭网关等功能实体。 UE 通过与用户的信息交互, 可以实现如点播、 直播等 IPTV业务。
SCF 12, 与 UE 11相连接, 其作为 NGN业务控制层面的主要功能实体 的集合, 主要用于会话控制、 业务认证、 鉴权、 计费等。 在 IMS网络情况 下,该实体为 Core IMS。 Core IMS主要用于提供基于 SIP的会话控制机制, 对 IPTV终端用户进行认证、鉴权,请求资源接纳控制子系统进行资源分配 等。 Core IMS通过与 IPTV终端、 IPTV应用功能实体及内容分发功能实体 交互进行 SIP会话, 完成安全、 QoS、 计费、 漫游等功能。
IPTV SCF 13 , 通过会话初始化协议( Session Initiation Protocol, SIP ) 与上述 SCF 12相连接, 用于在会话启动或者修改时提供业务鉴权, 其功能 包括: 检查用户的信息、 查看用户是否能够合法使用选择的内容; 信用限 制和信用控制; 为系统选择提供初步服务的 IPTV群集控制功能实体 16, 其中,该功能实体主要针对点播、直播、录像、时移等 IPTV业务。 IPTV SCF 13在 IMS 网络情况下为一个 IPTV SIP应用服务器, 其对应 Open IPTV Forum标准组织中的 IPTV Control和 IPTV Application的集合, 对应 ITU-T 标准中的 IPTV应用功能 (IPTV Application Functions )及应用支持功能 ( Application Support Functions ) 以及月良务支持功能 ( Service Support Functions )。
CDN 14, 通过 Xc和 Xd接口与 UE相连接, 其中, 通过 Xc接口连接
UE用于对媒体流按照实时流协议 ( Real Time Streaming Protocol, RTSP ) 进行控制,通过 Xd接口连接 UE用于对媒体流 RTP进行传输和媒体下载(可 以采用 HTTP ( Hypertext Transfer Protocol )协议)。
CDN控制功能实体 15 , 完成群集控制功能实体 16的选择, 通常在一 个 CDN网络中可能有 1个或者多个该功能实体, CDN控制功能实体 15之 间需要相互交互来进行群集控制功能实体 16的选择。 其主要包含位置控制 功能 ( Location Control Functions ) 和 空制功能 ( Distribution Control Functions )„ 位置控制功能负责选择请求的内容定位到合适的 CDN节点, 分发控制功能负责内容分发(内容注入、 内容调度、 老化等) 的控制。
群集控制功能实体 16, 该功能代理 UE和内容交付功能实体 17之间的 消息交互, 维护内容交付功能实体 17的状态并处理与其的交互, 同时其也 终结 IPTV 业务会话的建立。 其主要包含位置控制功能 (Location Control Functions )和分发控制功能 ( Distribution Control Functions )和内容交付控 制功能( Content Delivery Functions )。 位置控制功能负责选择请求的内容定 位到合适的内容交付功能实体 17, 分发控制功能负责内容分发(内容注入、 内容调度、 老化等)到具体的内容交付功能实体 17的控制。 内容交付控制 主要负责 RTSP媒体流的控制。
内容交付功能实体 17, 负责媒体的处理、 交付(单播或者组播)和内 容分发、 存储功能。
C21/C22接口 ( RTSP接口), 用户群集控制功能实体 16通过该接口对 内容交付功能实体 17进行媒体控制。
C11/C12接口 (控制接口 ), 该接口采用 SIP协议实现, CDN控制功能 实体 15决策可以提供内容上传服务的其他 CDN节点信息; CDN节点也可 以通过该接口向 CDN控制功能实体 15上报各节点的服务状态信息等。
根据本发明实施例, 首先提供了一种内容上传方法, 该方法用于将用 户设备产生的内容上传至内容分发网络的一个或多个 CDN节点, 或者, 将 用户设备产生媒体流上行至内容分发网络的一个或多个 CDN节点。
图 2为根据本发明实施例的内容上行方法的流程图, 如图 2所示, 根 据本发明实施例的内容上传方法主要包括以下步骤 (步骤 S201 -步骤 S205 ):
步骤 S201: CDN控制功能实体在接收到请求内容上传或者媒体流上行 的会话初始化请求后 ,分配一个或多个 CDN节点 ,并向该一个或多个 CDN 节点的群集控制功能实体发送会话请求;
步骤 S203: 接收到上述会话初始化请求的群集控制功能实体与其选择 的内容交付功能实体建立内容上传或媒体流上行的会话, 并将建立的会话 的确认信息返回给 CDN控制功能实体;
步骤 S205: CDN控制功能实体将接收到的确认信息返回给用户设备, 用户设备根据接收到的确认信息将内容上传或将媒体流上行至各个群集控 制功能实体选择的内容交付功能实体。
在本发明实施例中, 用户设备发送的会话初始化请求包括: 请求内容 上传 (即媒体文件的上传) 的会话初始化请求和请求媒体流上行(即上行 流, UE将媒体流采用 RTSP的方式发送到 CDN中 ) 的会话初始化请求, 针对这两种内容的上行, 本发明实施例分别提供了具体的处理方案, 以下 通过具体实施例进行说明。
实施例一
在本实施例中,用户设备请求媒体文件的上传,具体可以采用 FTP( File Transfer Protocol ) /HTTP等文件传输协议的方式进行上传。 在本实施例中, 群集控制功能实体向 CDN控制功能实体返回的为保存用户设备上传的媒体 文件的内容交付功能实体的路径信息, 具体地, 该路径信息可以包括: 内 容交付功能实体的 IP地址和端口信息等。
图 3为本实施例中用户设备上传媒体文件的流程图, 如图 3所示, 用 户设备上传媒体文件流程主要包括以下步骤:
步骤 301 ,用户设备向业务控制功能实体和 /或 IPTV服务控制功能实体 发送媒体文件的上传的会话请求(SIP INVITE );
在具体实施过程中, UE可以采用 FTP/HTTP等文件传输协议的方式上 传媒体文件。
具体地, 在执行该步骤的操作的过程中, 将涉及 UE、 IPTV服务控制 功能实体、业务控制功能实体及资源与接纳控制功能实体( RACS或 RACF ) 的交互, 其中, 业务控制功能和资源与接纳控制功能之间将涉及到资源的 预留操作。
具体地, 该会话请求可以携带有以下信息之一或其任意组合: 上传的 内容标识符信息、内容描述信息、媒体文件的大小信息等。并且,在 Core IMS 作为核心控制的情况下, 该会话请求可以采用 SIP ( Session Initiation Protocol )协议,将携带的相关信息保存在 SDP( Session Description Protocol ) 中进行发送。 步骤 302, IPTV服务控制功能或者业务控制功能将该媒体文件上传的 会话初始化请求发送到 CDN中的 CDN控制功能;
在具体实施过程中, 该会话初始化请求中可以携带特定区域的信息, 用于指示 CDN控制功能选择该特定区域的 CDN节点, 或者, 也可以在该 会话初始化请求中不携带特定区域的信息, 即不限定 CDN控制功能选择的 CDN节点的范围。
步骤 303 , 接收到媒体文件上传的会话初始化请求的 CDN控制功能实 体根据其管理的各 CDN节点的负载信息及接收到的会话初始化请求中是否 含有特定区域的信息确定需要保存该媒体文件 (或称为媒体内容) 的一个 或多个 CDN节点。
在本实施例中,以选择 CDN节点 1为例进行说明,对于选择多个 CDN 节点, 其具体操作与选择一个 CDN节点的操作相似。
步骤 304, CDN控制功能实体将该媒体文件上传的会话初始化请求转 发给其选定的 CDN节点 1的群集控制功能;
步骤 305 , 群集控制功能选择其所在 CDN节点的内容交付功能并与其 建立媒体文件上传的会话;
具体地, 群集控制功能可以根据内容交付功能的负载状态信息等信息 进行内容交付功能的选择。
具体地, 媒体控制功能实体与内容交付功能实体建立媒体文件上传的 会话可以包括以下几个步骤:
步骤 1 , 群集控制功能向其选中的内容交付功能发送内容上传请求; 步骤 2, 内容交付功能实体接收上述内容上传请求, 向群集控制功能发 送内容上传的响应消息, 其中, 该响应消息中携带有可以上传的确认信息 以及可以存储该媒体文件的路径信息;
步骤 3, 群集控制功能根据其接收到的来自 CDN控制功能实体的上述 会话初始化请求中携带的媒体文件大小信息确定分配给该媒体文件上传需 要的资源信息, 其中, 包含需要分配的带宽信息等。
在具体实施过程中, 步骤 3可以在步骤 1和步骤 2之前执行。
步骤 306, 群集控制功能向 CDN控制功能发送响应消息, 该响应消息 中携带有保存用户设备上传的媒体文件的内容交付功能实体的路径信息, 即 IP地址、 端口等信息, 可选地, 还可以携带媒体文件上传所需要的带宽 信息等;
步骤 307, CDN控制功能实体将接收到的响应消息中携带的信息通过 媒体文件上传的响应消息转发给 IPTV服务控制功能或者业务控制功能; 步骤 308, IPTV服务控制功能或者业务控制功能将上述信息通过上传 应答消息返回给 UE, 在执行步骤 308的操作时, 包含对上述步骤 301中业 务控制功能预留的带宽等资源进行提交的操作;
步骤 309, 接收到上述上传应答消息的 UE根据上述 IP地址及端口信 息等, 与对应的内容交付功能实体之间进行 FTP或者 HTTP等文件传输, 将 UE中的媒体内容上传到内容交付功能中。
实施例二
在本实施例中, 用户设备请求媒体流上行, 在本实施例中, 群集控制 功能实体向 CDN控制功能实体返回的为 RTSP的会话标识符信息。
图 4为本实施例中用户设备的上行流(即媒体流上行) 的流程图, 如 图 4所示, 用户设备的上行流的流程主要包括以下步骤:
步骤 401 , UE向 IPTV服务控制功能实体或业务控制功能实体发送上 行流的会话请求( SIP INVITE );
该会话请求将涉及 UE、 IPTV服务控制功能实体、 业务控制功能实体 及资源与接纳控制功能实体(RACS或 RACF )的交互, 其中, 业务控制功 能与资源与接纳控制功能之间将涉及到资源的预留操作。 具体地, 该会话请求中可以携带上行流的内容标识符信息、 内容描述 信息、 媒体内容的码流大小信息等。 在 Core IMS作为核心控制的情况下, 该会话请求可以采用 SIP协议, 相关信息保存在 SDP中进行发送。
步骤 402, IPTV服务控制功能或者业务控制功能将上行流的会话初始 化请求发送到 CDN控制功能实体;
步骤 403 , 接收到上行流的会话初始化请求的 CDN控制功能实体根据 其管理的各 CDN节点的负载信息及请求的 SDP中是否携带有特定区域的 信息, 来确定保存 UE上传的媒体流的一个或多个 CDN节点, 在本实施例 中, 下面步骤中以选择的一个 CDN 节点为例进行说明, 对于选择的其他 CDN节点, 其操作相似;
步骤 404: CDN控制功能实体将上行流的会话初始化请求转发给其选 定 CDN节点的群集控制功能实体;
步骤 405 ,群集控制功能实体选择内容交付功能实体并与其建立上行流 的会话, 具体可以根据内容交付功能实体的负载状态等信息进行选择; 具体地, 群集控制功能实体与内容交付功能实体建立会话可以包括以 下步骤:
步骤 1 ,群集控制功能实体向其选中的内容交付功能实体发送上行流的 查询请求( RTSP DESCRIBE消息 );
步骤 2, 内容交付功能向群集控制功能返回响应消息, 其中, 该响应消 息中可以携带接收上行流的媒体路径信息, 即 IP地址、 端口等信息;
步骤 3 ,群集控制功能实体向内容交付功能实体发送媒体通道建立消息 ( RTSP SETUP );
步骤 4, 内容交付功能实体接收上述媒体通道建立消息, 向群集控制功 能实体发送媒体通道建立成功的确认消息,该确认消息中携带有 RTSP的会 话标识符信息, 即 RTSP Session ID; 步骤 5 ,群集控制功能实体根据上述接收到的上行流的会话初始化请求 中携带的码流大小等信息 (例如, 高清、 标清等信息)确定分配给该文件 上行流的资源信息, 其中, 包含需要分配的带宽信息等。
在具体实施过程中, 上述步骤 5可以在上述步骤 1、 2、 3和 4之前执 行。
步骤 406, 群集控制功能向 CDN控制功能发送响应消息, 该响应消息 中包含有建立的 RTSP的会话标识符信息、 带宽等资源信息;
步骤 407, CDN控制功能实体将接收到的响应消息中携带的信息转发 给 IPTV服务控制功能实体或者业务控制功能实体;
步骤 408, IPTV服务控制功能实体或者业务控制功能实体将上述步骤 407 中接收到的信息返回给 UE, 具体可以通过上行流的应答消息返回给 UE;
在执行该步骤的过程中, 包括对步骤 401 中业务控制功能预留的带宽 等资源进行提交的操作。
步骤 409, 上行流从 UE到内容交付功能。
具体地,接收到上述应答消息的 UE根据消息中携带的信息执行以下步 骤:
步骤 1 , UE向群集控制功能实体发送 RTSP录制( RTSP RECORD )请 求, 请求录制内容, 该请求中携带接收到的上述 RTSP的会话标识符; 步骤 2, 群集控制功能实体向内容交付功能实体请求 RTSP RECORD, 请求录制内容;
步骤 3 , 内容交付功能实体向群集控制功能实体发送确认消息, 即将进 行录制;
步骤 4, 群集控制功能实体向 UE发送确认消息, 即将进行录制, 上行 流从 UE到内容交付功能实体。 通过本发明实施例提供的上述内容上传方法, 可以实现用户产生内容 的上传。
根据本发明实施例, 还提供了一种内容分发网络。
图 5为根据本发明实施例的内容分发网络的结构示意图, 如图 5所示, 根据本发明实施例的内容分发网络主要包括: CDN控制功能实体 1和一个 或多个 CDN节点 3 (图中示出了一个 CDN节点)。
下面结合附图分别对上述各个实体进行描述。
如图 5所示,具体地, CDN控制功能实体可以包括: 第一接收模块 11、 第一选择模块 13和第一发送模块 15。 其中, 第一接收模块 11 , 用于接收 请求内容上传或媒体流上行的会话初始化请求; 第一选择模块 13与第一接 收模块 11连接, 用于根据一个或多个 CDN节点 3的负载信息和 /或上述会 话初始化请求中携带的区域信息, 分配一个或多个 CDN节点; 第一发送模 块 15与第一选择模块 11连接, 用于向第一选择模块 11分配的一个或多个 CDN节点的群集控制功能实体发送会话请求;
对于每个 CDN节点 3包括: 群集控制功能实体 31和至少一个内容交 付功能实体 33 (为了方便示意, 图中只示出了一个)。
其中,如图 5所示,群集控制功能实体 31可以包括:第二接收模块 311、 第二选择模块 313、 会话建立模块 315和第二发送模块 317。 其中, 第二接 收模块 311 , 用于接收 CDN控制功能实体 1发送的会话请求; 第二选择模 块 313与第二接收模块 311连接,用于根据该群集控制功能实体所在的 CDN 节点中各个内容交付功能实体 33的负载状态信息, 选择一个内容交付功能 实体; 会话建立模块 315与第二选择模块 313连接, 用于建立群集控制功 能实体与第二选择模块 313选择的内容交付功能实体 33的会话; 第二发送 模块 317与会话建立模块 315连接, 用于将会话建立模块 317建立的会话 的确认信息发送给用户设备; 内容交付功能实体 33与群集控制功能实体 31和用户设备连接, 用于 接收用户设备上传的内容或者上行的媒体流。
如上所述, 借助本发明实施例提供的技术方案, 通过 CDN控制功能实 体选择保存用户设备上传的数据的 CDN节点, 并通过 CDN节点内部的群 集控制实体与内容交付功能实体建立上传数据的会话, 可以将用户设备产 生的内容上传到 CDN节点的内容交付功能实体,从而使得下一代网络中的 内容分发网络可以支持用户产生内容, 因而可以为用户提供更多的新业务, 进而可以提高用户体验, 提升服务商的竟争力。
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 本领域的技术人员来说, 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。

Claims

权利要求书
1.一种内容上行的方法, 其特征在于, 所述方法包括:
CDN控制功能实体在接收到请求内容上传或者媒体流上行的会话初始 化请求后, 分配一个以上 CDN节点, 并向所述一个以上 CDN节点的群集 控制功能实体发送会话请求;
接收到所述会话请求的群集控制功能实体选择内容交付功能实体, 并 与选择的内容交付功能实体建立内容上传或者媒体流上行的会话, 然后将 所述会话的确认信息返回给所述 CDN控制功能实体;
所述 CDN控制功能实体将接收到的确认信息返回给用户设备,所述用 户设备根据所述确认信息将内容上传或将媒体流上行至各个群集控制功能 实体选择的内容交付功能实体。
2.根据权利要求 1所述的方法, 其特征在于, 所述 CDN控制功能实体 接收到所述会话初始化请求之前, 所述方法还包括:
所述用户设备向业务控制功能实体或 IPTV服务控制功能实体发送请 求消息, 请求向 CDN进行内容上传或者媒体流上行;
所述业务控制功能实体或 IPTV 服务控制功能实体接收到所述请求消 息后, 向所述 CDN控制功能实体发送所述会话初始化请求。
3.根据权利要求 2所述的方法, 其特征在于, 所述请求消息和所述会 话初始化请求中携带的参数包括以下之一或其任意组合: 上传内容的内容 标识符信息或上行的媒体流的内容标识符信息、 内容描述信息、 内容的码 流大小信息。
4.根据权利要求 1所述的方法, 其特征在于, 所述 CDN控制功能实体 按照以下方式分配一个以上 CDN节点:
所述 CDN控制功能实体根据自身管理的各个 CDN节点的负载信息和 / 或所述会话初始化请求中携带的区域信息, 确定需要保存所述用户设备的 内容的所述一个以上 CDN节点。
5.根据权利要求 1 所述的方法, 其特征在于, 所述群集控制功能实体 根据该群集控制功能实体所在 CDN节点内各个内容交付功能实体的负载状 态信息, 选择内容交付功能实体。
6.根据权利要求 1所述的方法, 其特征在于, 所述 CDN控制功能实体 将接收到的确认信息返回给所述用户设备, 包括:
所述 CDN控制功能实体将所述确认信息发送给 IPTV服务控制功能实 体或业务控制功能实体;
所述 IPTV服务控制功能实体或业务控制功能实体将所述确认信息发 送给所述用户设备。
7.根据权利要求 1至 6任一项所述的方法, 其特征在于, 所述 CDN控 制功能实体接收到的为请求内容上传的会话初始化请求时, 所述用户设备 请求上传的内容包括: 媒体文件; 所述确认信息包括: 内容交付功能实体 存储所述媒体文件的路径信息, 其中, 所述路径信息包括: IP地址和端口 信息。
8.根据权利要求 7所述的方法, 其特征在于, 所述群集控制功能实体 与该群集控制功能实体选择的内容交付功能实体建立内容上传或媒体流上 行的会话, 包括:
所述群集控制功能实体向所述内容交付功能实体发送内容上传请求; 所述内容交付功能实体接收所述内容上传请求, 向所述媒体控制功能 实体返回内容上传的响应消息, 其中, 所述响应消息中携带有确认内容上 传的信息、 存储所述媒体文件的路径信息。
9.根据权利要求 8所述的方法, 其特征在于, 所述群集控制功能实体 与该群集控制功能实体选择的内容交付功能实体建立内容上传或媒体流上 行的会话, 还包括: 所述群集控制功能实体根据自身接收到的所述会话初始化请求中携带 的用户设备上传的媒体文件的大小, 确定分配给上传所述媒体文件的资源。
10.根据权利要求 9所述的方法, 其特征在于, 所述用户设备根据所述 确认信息将内容分别上传至各个内容交付功能实体, 包括:
所述用户设备根据所述路径信息分别与各个内容交付功能实体进行文 件传输, 将所述用户设备中的媒体内容上传到各个内容交付功能实体。
11.根据权利要求 1至 6任一项所述的方法,其特征在于,所述 CDN控 制功能实体接收到的为请求媒体流上行的会话初始化请求时, 所述用户设 备请求上行媒体流的内容包括: 已经流化的媒体; 所述确认信息包括: 建 立的实时流协议 RTSP的会话标识符。
12.根据权利要求 11所述的方法, 其特征在于, 所述群集控制功能实体 与该群集控制功能实体选择的内容交付功能实体建立内容上传或媒体流上 行的会话, 包括:
所述群集控制功能实体向所述内容交付功能实体发送媒体流上行的查 询请求;
所述内容交付功能实体接收所述查询请求, 并向所述群集控制功能实 体返回响应消息, 其中, 所述响应消息中携带有接收已经流化的媒体的媒 体路径信息;
所述群集控制功能实体接收所述响应消息, 向所述内容交付功能实体 发送媒体通道建立请求;
所述内容交付功能实体接收所述媒体通道建立请求消息, 向所述群集 控制功能实体返回媒体通道建立成功的确认消息, 其中, 所述确认消息中 携带有所述 RTSP的会话标识符。
13.根据权利要求 12所述的方法, 其特征在于, 所述群集控制功能实体 与该群集控制功能实体选择的内容交付功能实体建立内容上传或媒体流上 行的会话, 还包括:
所述群集控制功能根据接收到的所述会话初始化请求中携带的媒体流 上传的码流大小信息, 确定分配给媒体流上行的资源。
14.根据权利要求 13所述的方法, 其特征在于, 所述用户设备根据所述 确认信息将媒体流上行至各个内容交付功能实体, 包括:
所述用户设备根据所述群集控制功能实体返回的所述 RTSP 的会话标 识符, 向所述群集控制功能实体发送 RTSP请求, 其中, 所述 RTSP请求中 携带有所述 RTSP的会话标识符;
所述群集控制功能实体接收所述 RTSP请求,向其选择的所述内容交付 功能实体发送流控制请求;
所述内容交付功能实体向所述群集控制功能实体发送确认消息; 所述群集控制功能实体向所述用户设备返回确认消息, UE进行已经流 化的媒体上行。
15.—种内容分发网络, 其特征在于, 包括: CDN控制功能实体和一个 以上 CDN节点; 其中,
所述 CDN控制功能实体, 包括:
第一接收模块, 用于接收请求内容上传或媒体流上行的会话初始化请 求;
第一选择模块,用于根据所述一个以上 CDN节点的负载信息和 /或所述 会话初始化请求中携带的区域信息, 分配一个以上 CDN节点;
第一发送模块,用于向所述第一选择模块分配的所述一个以上 CDN节 点的群集控制功能实体发送会话请求;
所述一个以上 CDN节点, 其中, 每个 CDN节点包括: 群集控制功能 实体和至少一个内容交付功能实体, 其中,
群集控制功能实体, 包括: 第二接收模块,用于接收所述 CDN控制功能实体发送的所述会话请求; 第二选择模块,用于根据所述群集控制功能实体所在的 CDN节点中各 个内容交付功能实体的负载状态信息, 选择一个内容交付功能实体;
会话建立模块, 用于建立所述群集控制功能实体与所述第二选择模块 选择的内容交付功能实体的会话;
第二发送模块, 用于将所述会话建立模块建立的所述会话的属性信息 发送给用户设备;
所述内容交付功能实体, 用于接收所述用户设备上传的媒体文件或上 行的媒体流。
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EP2448260A1 (en) 2012-05-02
EP2448260B1 (en) 2015-09-16

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