WO2010115331A1 - 内容定位方法及内容分发网络节点 - Google Patents
内容定位方法及内容分发网络节点 Download PDFInfo
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- WO2010115331A1 WO2010115331A1 PCT/CN2009/073789 CN2009073789W WO2010115331A1 WO 2010115331 A1 WO2010115331 A1 WO 2010115331A1 CN 2009073789 W CN2009073789 W CN 2009073789W WO 2010115331 A1 WO2010115331 A1 WO 2010115331A1
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- service
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- control function
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Classifications
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- 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
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- 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
- H04L67/50—Network services
- H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
-
- 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
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
-
- 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
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
- H04N21/23103—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion using load balancing strategies, e.g. by placing or distributing content on different disks, different memories or different servers
-
- 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
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
- H04N21/23116—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion involving data replication, e.g. over plural servers
-
- 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
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
-
- 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
- H04N21/65—Transmission of management data between client and server
- H04N21/658—Transmission by the client directed to the server
- H04N21/6581—Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application
Definitions
- IPTV Internet Protocol Television
- IP bearer network The general name of the equipment of the business.
- the IPTV standard is based on the Next Generation Network (NGN) IP Multimedia Subsystem (IP Multimedia Subsystem) and NGN non-IMS architecture, which can provide users with on-demand, live broadcast and video recording. And some new business.
- NGN Next Generation Network
- IP Multimedia Subsystem IP Multimedia Subsystem
- NGN non-IMS architecture NGN non-IMS architecture
- the Content Delivery Network plays an important role in the IPTV system's Quality of Experience (QoE) protection and system stability.
- the important functional entities within the CDN are mainly used to implement content location technology, scheduling and storage functions.
- content location technology content location and playback need to be performed by the CDN host controller.
- the CDN host controller may cause processing delay, which affects system performance and becomes a bottleneck of system performance. .
- the processing delay can be reduced by increasing the CDN host controller to form a distributed CDN host controller for load sharing, this method increases the complexity and construction cost of the CDN host controller.
- the present invention provides an improved content locating solution for solving the problems of long processing delay and high cost existing in the prior art.
- a content locating method includes: a first content distribution network CDN node receives a service request sent from a service control function entity or an IPTV service control function entity, where the service request carries a content identifier for indicating a request and Content corresponding to the content identifier; if the first CDN node is unable to provide the content service requested by the service request, the first CDN node sends a query request to the CDN global controller to obtain the content service requested by the service request Information of the second CDN node, and requesting the second CDN node to provide the content service.
- the content locating method includes: the service control function entity or the IPTV service control function entity receives a service request from the user equipment, where the service request carries the address information of the user equipment and the identifier of the content requested by the user equipment.
- the service control function entity or the IPTV monthly control function entity selects the closest distance to the area to which the user equipment belongs based on the address information.
- the CDN node; the service control function entity or the IPTV service control function entity sends a service request message to the CDN node, requesting the CDN node to provide a content service for the user equipment.
- a content distribution network node is provided.
- the content distribution network node according to the present invention comprises: a media control function entity and at least one content delivery function entity.
- the media control function entity includes: a receiving module, a determining module, a selecting module, a querying module, and a sending module, where the receiving module is configured to receive a service request sent by the service control function entity or the IPTV service control function entity, where the service The request carries a content identifier, which is used to indicate that the content corresponding to the content identifier is requested; the determining module is configured to determine whether the content distribution network node can provide the content service requested by the service request; and the selecting module is used to determine in the determining module If the result is yes, the content delivery function entity that provides the content service is selected; the query module is configured to send a query request to the CDN global controller to obtain a second service capable of providing the content service if the result of the determination by the determination module is negative.
- the CDN node is configured to send a service request to the second CDN node acquired by the query module, requesting the second CDN node to provide the content service, and a content delivery function entity, configured to provide the content service for the user equipment.
- the service request is sent to the CDN node closest to the user equipment instead of being sent to the CDN global controller, and after receiving the service request, the CDN node cannot provide the user equipment for the user equipment.
- the content service requested by the device sends a query request to the CDN global controller, and forwards the service request to provide the foregoing content for the user equipment.
- 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 locating method according to an embodiment of the present invention
- FIG. 4 is a flow chart of the first embodiment
- FIG. 5 is a flow chart of the second embodiment
- FIG. 6 is a schematic structural diagram of a content distribution network node according to an embodiment of the present invention.
- 20% of the content is deployed on the CDN node closest to the user, but the CDN node can provide 80% on-demand service, and the remaining 20% of the on-demand service content is deployed.
- Central node usually the central node holds 100% of the content.
- the failure rate of the edge node is very low.
- nearly 80% of the on-demand services can be used for global redirection services through the CDN host controller. Therefore, the embodiment of the present invention provides an improved content locating scheme for the problem that content positioning and playback need to be performed by the CDN main controller, resulting in processing delay or excessive load causing failure.
- the service control function entity or the IPTV service control function entity sends the service request to the CDN closest to the home area of the user equipment.
- a node when the CDN node cannot provide the user equipment with the content service requested by the user equipment, acquires a CDN node capable of providing the content service through the CDN global controller, and sends the service request to the CDN node capable of providing the content service.
- 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 (User Equipment, called UE) 11. Service Control Function (Service Control Function, SCF, if IMS in NGN, Core IMS) Core IMS ) 12. IPTV Service Control Functions (IPTV called IPTV SCF) 13. Content Delivery Network (CDN) 14.
- User Equipment User Equipment
- SCF Service Control Function
- SCF Service Control Function
- IPTV SCF IPTV Service Control Functions
- CDN Content Delivery Network
- the CDN 14 further includes: a content distribution network global controller, which may also be referred to as a CDN control function/Content Delivery Network (Global) Controller, or a content delivery device.
- a content distribution network global controller which may also be referred to as a CDN control function/Content Delivery Network (Global) Controller, or a content delivery device.
- Media Control Function Entity Media Control Function or Content Control Function or Cluster Controller or Content Distribution & Delivery & Location Control Functions, referred to as MCF or CCF or CC or CD&D&LCF 16
- media delivery function entities Media Delivery Function or Content Delivery Function or Content Delivery and Storage Function, referred to as MDF or CDF or CD&SF).
- the CDN node (or instance) (1, 2...n) includes a media control function entity 16 and a plurality of media delivery function entities 17.
- the CDN node is not limited to the above-mentioned CDN node 1 and CDN node 2 (shown in the figure), and may be plural.
- the entities and interfaces of the NGN-based IPTV system are separately described below.
- the UE 11 may be a mobile phone with mobility 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. By interacting with the user, the UE can implement IPTV services such as on-demand and live broadcast.
- 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, authenticating, and requesting resource admission control subsystems for resource allocation.
- the Core IMS interacts with the IPTV terminal, the IPTV application function entity, and the content distribution function entity to perform SIP sessions, and performs functions such as security, quality of service (QoS), billing, and roaming.
- QoS quality of service
- the IPTV SCF 13 is connected to the SCF 12 by using a Session Initiation Protocol (Sinus Initiation Protocol) to provide service authentication during session initiation or modification.
- the functions include: checking user information and viewing Whether the user can legally use the selected content; credit restriction and credit control; and the IPTV media control function entity 16 that provides initial service for the system selection, wherein the functional entity is mainly for IPTV services such as on-demand, live broadcast, video recording, and time shift.
- 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, and corresponds to IPTV application functions and applications 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 RTSP, and the UE is connected to the media stream RTP for transmission and media download through the Xd interface (the HTTP protocol may be adopted).
- Interface A1 mainly used by the CDN global controller 15 to return its management to the IPTV SCF 13.
- the C21/C22 interface through which the user media control function entity 16 media controls the media delivery function entity 17.
- the C11/C12 interface (control interface) is implemented by the SIP protocol.
- the CDN node queries the CDN global controller 15 for other CDN node information that can provide on-demand services through the interface; the CDN node can also use the interface to the CDN global controller. 15 on ⁇ 3 ⁇ 4 each node's service status information.
- the content locating method includes the following steps (step S201 - step S203):
- Step S201 In the specific implementation process, before the CDN node 1 receives the service request, the triggering of the process of step S201 may include the following steps: Step 1: The service control function entity or the IPTV service control function entity receives the user equipment to send The service request, where the service request carries the address of the user equipment and the content identifier; Step 2: The service control function entity or the IPTV service control function entity selects the CDN node 1 closest to the user equipment according to the area to which the user equipment belongs Step 3: The service control function entity or the IPTV service control function entity sends the foregoing service request to the CDN node 1.
- the foregoing service request includes but is not limited to at least one of the following: an on-demand request, a network video recording request, and a true video on demand request.
- Step S103 the CDN node 1 first determines whether it can provide the content service requested by the service request, specifically, the CDN node 1
- the following method is used to determine whether it can be used for the above content: Step 1, the CDN node 1 determines whether there is content corresponding to the content identifier in its content delivery function entity, and if so, proceeds to step 2, otherwise, the CDN node 1 determines It cannot provide the above content service; Step 2: The CDN node 1 determines whether the content service currently provided by the content interaction entity has reached a given threshold (for example, 80%), and if so, determines that the CDN node 1 cannot provide the requested The content service, otherwise, determines that the CDN node 1 is capable of providing the requested content service.
- a given threshold for example, 80%
- the CDN node 1 determines that it cannot provide the content service requested by the service request, the CDN node 1 sends a query request to the CDN global controller to acquire information of the CDN node capable of providing the content service.
- the CDN global controller queries the CDN node that can provide the content service, and returns a response message to the CDN node 1, where the response message carries information of the CDN node that can provide the content service.
- the CDN global controller may return to the CDN node 1 all list information of CDN nodes that can provide the above content service, or may only return information of the optimal CDN node to the CDN node 1, and the CDN node 1 according to the CDN global controller
- the returned node information acquires information of the CDN node 2 (which may be an optimal node) capable of providing the above content.
- the CDN node 1 After acquiring the information of the CDN node 2, the CDN node 1 sends a service request to the CDN node 2 according to the information of the CDN node 2, requesting the CDN node 2 to provide the content service for the user equipment; after receiving the service request, the second CDN node receives the service request.
- the method further includes the following steps: (1) the media control function entity in the CDN node 2 delivers the functional entity according to the internal content of the node.
- the service status queries the URL address information of the serviceable content delivery function entity, and the content delivery function entity sends a request for an RTSP Description message (RTSP DESCRIBE), which describes the requested program information.
- the URL of the request also carries user information of the user equipment, path information of the requested program, and the like.
- the media delivery function entity in the CDN node 2 returns to the media control function entity to mention
- the program description information of the service delivery entity of the service includes information such as content size, name, play time, IP address, and port.
- the RTSP description message in step (1) and step (2) is optional, and the media control function entity may include description information of the content in the selected media delivery function entity.
- the media control function entity in the CDN node 2 sends an RTSP session establishment message to the media delivery function entity in the CDN node 2, requesting to establish a session connection of the media channel.
- the media delivery function entity in the CDN node 2 returns the session connection RTSP Session ID of the media delivery function entity that can provide the monthly service to the media control function entity.
- the user equipment sends a play request to the CDN node 2 according to the identifier of the session, requesting to play the content corresponding to the content identifier.
- a session is established between the first media control function entity in the CDN node 1 and the first media delivery function entity providing the content service in the CDN node 1 (RTSP Session) ), return the identity of the session to the user device.
- the user equipment after returning the identifier of the session to the user equipment, the user equipment sends a play request to the CDN node 1 according to the identifier of the session, requesting to play the content corresponding to the content identifier.
- the method may include the following steps: (1) The media control function entity in the CDN node 1 queries its managed media delivery managed by its node. The URL address information of the functional entity and a request to establish a session is sent to the selected media delivery function entity.
- the step (1) may further include the following: the media control function entity in the CDN node 1 sends an RTSP DESCRIBE message to the media delivery function entity, and queries the SDP information of the media delivery function entity that can provide the service, where the RTSP DESCRIBE message carries There is URL address information and description information of the media content; the media delivery function entity returns an ACK message to the media control function entity, including SDP information; and the media control function entity initiates to the media delivery function entity
- RTSP SETUP message RTSP session link of user establishment and media delivery function entity
- media delivery function entity returns ID of content delivery session establishment to media control function entity, ie RTSP Session ID.
- the media control function entity returns the ID of the content delivery session to the user equipment through the session initialization response.
- the user equipment requests the CDN 1 node to perform on-demand, and the CDN node 1 provides a streaming service to the user equipment.
- the step (3) may further include: the media control function entity to the media delivery function entity requesting RTSP PLAY or RTSP RECORD to request to play the content; the media delivery function entity confirms to the media control function entity, that is to be played The media control function entity confirms the user equipment, and is about to play; the media delivery function entity in the CDN node 1 sends an RTP stream to the user equipment for playing or recording.
- the load of the CDN global controller can be reduced, and the processing delay can be reduced.
- Another content locating method is also provided in accordance with an embodiment of the present invention.
- FIG. 3 is a flow chart of another content locating method according to an embodiment of the present invention.
- another content locating method includes the following steps (step S301 - step S305):
- Step S301 The service control function entity or the IPTV service control function entity receives the service from the user equipment. a request, where the service request carries the address information of the user equipment and the identifier of the content requested by the user equipment;
- Step S303 The service control function entity or the IPTV service control function entity selects the user equipment according to the address information.
- Step S305 The service control function entity or the IPTV service control function entity sends a service request message to the CDN node, requesting the CDN node to provide a content service for the user equipment.
- the CDN node may perform content positioning according to the method shown in FIG. 2 above. According to the foregoing content locating method provided by the embodiment of the present invention, a service request can be sent to a CDN node that is closest to the user equipment, thereby reducing processing delay.
- FIG. 4 is a flowchart of the embodiment.
- the content service provided by the user equipment in the embodiment is described below with reference to FIG. 1.
- the process mainly includes the following steps: Step S401: The service control function entity 12 or 13 receives the session initialization sent from the UE 11 ( SIP INVITE ) Request, where the SDP of the request includes the IP address, port and content identifier of the UE 11.
- the service control function entity 12 or 13 selects the CDN node to provide the service according to the area to which the UE 11 belongs, which is the CDN node 1 in this embodiment; and the IPTV service control function entity 13 periodically detects that the content distribution network 14 is providing the service. State, selecting the node controller 16 as close as possible and without failure; Step S403: The entity 16 of the CDN node 1 receiving the session initialization (SIP INVITE) request determines whether the CDN node 1 can provide the media service, specifically, the judgment basis includes not limited to:
- Step S405 In the above step, the media control function entity 16 of the CDN node 1 determines that the CDN node 1 cannot provide the media service, and the media control function entity 16 in the CDN node 1 sends a SIP OPTION message to the CDN global controller 15, the query is the most An excellent CDN node that can provide a service, the node includes an IP address and a port number (the status information such as the distance from the UE 11 and the load of the node according to the node); Step S407: The CDN global controller 15 queries for a service that can be provided.
- Step S409 The CDN global controller 15 returns the queryable node (or node list) information of the query to the media control function entity 16 in the CDN node 1;
- Step S411 The media in the CDN node 2 to which the CDN node 1 selects The control function entity 16 sends a SIP INVITE message, which includes SIP Session ID information, requesting the CDN node 2 to provide a service request service;
- Step S413 The media control function entity 16 in the CDN node 2 queries the serviceable media delivery within its node Information of the functional entity 16; the media control function entity 16 sends a request for the RTSP DESCRIBE message to the selected media delivery function entity 16, i.e., selects which program to broadcast.
- Step S415 The media delivery function entity 16 in the CDN node 2 returns the serviceable service to the media control function entity 16 by using a response message (OK)
- the program description information of the media delivery function entity 16 includes information such as a content size, a name, a play time, an IP address, and a port.
- the media control function entity 16 selected in the above step S405 can provide the CDN node 1
- the above steps S413 and S415 may be omitted.
- Step S417 The media control function entity 16 in the CDN node 2 initiates an RTSP SETUP message to the media delivery function entity 16, and the user establishes an RTSP session link with 17;
- Step S419 The media delivery function entity 16 in the CDN node 2 provides the media control function The entity 16 returns the ID of the content delivery session establishment by the response message (OK), that is, the RTSP Session ID;
- Step S421 The media control function entity 16 in the CDN node 2 returns the content to the media control function entity 16 in the CDN node 1 through the response message.
- the ID of the delivery session is the SIP Session ID and the RTSP Session ID;
- Step S423 The media control function entity 16 in the CDN node 1 binds the ID of the content delivery session (ie, the RTSP Session ID and the SIP Session ID), and the result is obtained. The response is returned to the UE 11 through the session.
- the session initialization response process between the media control function entity 16 -> UE 11 may be implemented by using an existing process, and is not specifically mentioned;
- Step S425 UE UE 11 requests RTSP from the media control function entity 16 in the CDN node 2
- Step S427 The media control function entity 16 in the CDN node 2 requests the media delivery function entity 16 to request RTSP PLAY or RTSP RECORD to request to play the content;
- Step S429 The media delivery function entity in the CDN node 2 16 returns to the media control function entity 16 to confirm the information, indicating that the playback is about to be performed;
- Step S431 The media control function entity 16 in the CDN node 2 returns the UEUE 11 confirmation message indicating that the playback is about to be performed;
- Step S433 The media delivery function in the CDN node 2 The entity 16 sends an RTP stream to the UE 11 for playback or recording.
- the CDN node 1 selected by the service control function entity or the IPTV service control function entity can provide the content service requested by the user equipment.
- FIG. 5 is a flowchart of the embodiment. The content service of the user equipment in the embodiment is described below with reference to FIG. 1. As shown in FIG. 5, the process mainly includes the following steps: Step S501: The service control function entity 12 or the IPTV service control function entity 13 receives the slave UE 11 The sent session initialization (SIP INVITE) request includes the IP address, port, and content identifier of the UE 11 in the SDP of the request. The IPTV service control function entity 13 selects the CDN node to provide the service according to the area to which the UE 11 belongs.
- SIP INVITE sent session initialization
- the CDN node specifically, the IPTV service control function entity 13 periodically detects that the content distribution network 14 is providing the service. a state to select the node controller 16 as close as possible to the user equipment and without failure;
- Step S503 The media control function entity 16 of the CDN node 1 receiving the SIP INVITE request determines whether or not it can provide the media service;
- S505 The judgment result of the foregoing step is that the content of the user-on-demand exists in the CDN node 1 and can be accepted for on-demand, and the media control function entity 16 of the CDN node 1 selects the media delivery function entity 16 in the node that can provide the service, and media control
- the function entity 16 sends an RTSP DESCRIBE message to the selected media delivery function entity 16 to query the SDP information of the media delivery function entity 16 that can provide the service, including the URL address information;
- Step S507 The media delivery function entity 16 of the CDN node 1 returns an ACK message to the media control function entity 16, including SDP information.
- Step S509 The media control function entity 16 of the CDN node 1 initiates an RTSP SETUP message to the media delivery function entity 16, and the user establishes an RTSP session link with 17;
- Step S511 The media delivery function entity 16 of the CDN node 1 goes to the media control function entity 16 Returning the ID of the content delivery session establishment, that is, the RTSP Session ID;
- Step S513 The media control function entity 16 of the CDN node 1 binds the ID of the content delivery session, that is, the RTSP Session ID and the SIP Session ID, and wins the result.
- the session initialization response is returned to the UE 11.
- the session initialization response process between the media control function entity 16 -> UE 11 may adopt an existing process, and details are not described herein again;
- Step S515 The UE 11 to the media control function entity 16 requests RTSP PLAY (play) or RTSP RECORD (recording) Requesting to play the content, the request carries the RTSP session ID of the media control function entity 16 and the session ID information of the media delivery function entity 16;
- Step S517 The media control function entity 16 to the media delivery function entity 16 requests RTSP PLAY (play) Or RTSP RECORD (request), requesting to play the content; wherein, selecting RTSP PLAY or RTSP RECORD is determined according to step S519.
- Step S519 The media delivery function entity 16 returns an acknowledgement message (ACK) to the media control function entity 16, indicating that the playback is about to be performed.
- Step S521 The media control function entity 16 returns an acknowledgement message (ACK) to the UE 11, indicating that the playback is about to be performed;
- S523 The media delivery function entity 16 in the CDN node 1 sends an RTP stream to the UE 11 for playback or recording.
- a content distribution network node is also provided.
- FIG. 6 is a schematic structural diagram of a content distribution network node according to an embodiment of the present invention. As shown in FIG.
- a content distribution network node includes a media control function entity 60 and at least one content delivery function entity 62.
- the media control function entity 60 may include: a receiving module 600, a determining module 602, a selecting module 604, a querying module 606, and a sending module 608.
- the receiving module 600 is configured to receive a service request sent by the service control function entity or the IPTV service control function entity, where the service request carries a content identifier, and is used to indicate that the content corresponding to the content identifier is requested;
- the determining module 602 is connected to the receiving module 600, and is configured to determine whether the CDN node can provide the content service requested by the service request.
- the selecting module 604 is connected to the determining module 602, and the result determined by the determining module 602 is yes.
- the content delivery function entity 62 that provides the content service is selected;
- the query module 606 is connected to the determination module 602, and is configured to send a query request to the CDN global controller if the result of the determination by the determination module 602 is negative.
- the sending module 608 is connected to the query module 606, and configured to send a service request to the second CDN node acquired by the query module 606, requesting the second CDN node to provide the content service; a delivery function entity 62, connected to the media control function entity 60, for Household device providing the content service.
- the service control function entity or the IPTV service control function entity sends the service request to the CDN node closest to the user equipment home zone, if the CDN node can provide the user equipment for the user equipment.
- the content service requested by the device, the service control function entity or the IPTV service control function entity sends a service request message to the CDN node, requesting the CDN node to provide a content service for the user equipment.
- the CDN global controller obtains the CDN node that can provide the content service, and sends the service request to the A CDN node that provides the above content services.
- the technical solution provided by the present invention can solve the problem that the content positioning method in the prior art is effective, and can reduce the CDN processing delay without increasing the cost of the device.
- the pressure of the CDN global controller can be alleviated, and the CDN global controller can be prevented from becoming a performance bottleneck, thereby ensuring the reliability of its work.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Information Transfer Between Computers (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Telephonic Communication Services (AREA)
Description
Claims
Priority Applications (3)
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RU2011144802/07A RU2530016C2 (ru) | 2009-04-10 | 2009-09-07 | Способ локализации контента и узел сети доставки контента |
US13/259,305 US9584870B2 (en) | 2009-04-10 | 2009-09-07 | Content locating method and content delivery network node |
EP09842892.3A EP2418848A4 (en) | 2009-04-10 | 2009-09-07 | CONTENT LOCALIZATION PROCEDURES AND CONTENT DELIVERY NETWORK NODES |
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CN200910134425.0A CN101860720B (zh) | 2009-04-10 | 2009-04-10 | 内容定位方法及内容分发网络节点 |
CN200910134425.0 | 2009-04-10 |
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WO2010115331A1 true WO2010115331A1 (zh) | 2010-10-14 |
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PCT/CN2009/073789 WO2010115331A1 (zh) | 2009-04-10 | 2009-09-07 | 内容定位方法及内容分发网络节点 |
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US (1) | US9584870B2 (zh) |
EP (1) | EP2418848A4 (zh) |
CN (1) | CN101860720B (zh) |
RU (1) | RU2530016C2 (zh) |
WO (1) | WO2010115331A1 (zh) |
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EP2418848A4 (en) | 2013-09-25 |
US20120023530A1 (en) | 2012-01-26 |
EP2418848A1 (en) | 2012-02-15 |
RU2011144802A (ru) | 2013-05-20 |
CN101860720B (zh) | 2015-05-20 |
US9584870B2 (en) | 2017-02-28 |
RU2530016C2 (ru) | 2014-10-10 |
CN101860720A (zh) | 2010-10-13 |
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