WO2008089702A1 - Système et procédé de mise en oeuvre de service multimédia en flux, et entité de fonction de commande de ce service - Google Patents

Système et procédé de mise en oeuvre de service multimédia en flux, et entité de fonction de commande de ce service Download PDF

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Publication number
WO2008089702A1
WO2008089702A1 PCT/CN2008/070160 CN2008070160W WO2008089702A1 WO 2008089702 A1 WO2008089702 A1 WO 2008089702A1 CN 2008070160 W CN2008070160 W CN 2008070160W WO 2008089702 A1 WO2008089702 A1 WO 2008089702A1
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WIPO (PCT)
Prior art keywords
service
information
sscf
media
streaming media
Prior art date
Application number
PCT/CN2008/070160
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English (en)
Chinese (zh)
Inventor
Jincheng Li
Jun Yan
Feng Wang
Xiangyang Wu
Youying Li
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008089702A1 publication Critical patent/WO2008089702A1/fr

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Classifications

    • 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
    • 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
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/613—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for the control of the source by the destination

Definitions

  • the present invention relates to streaming media communication technologies, and in particular, to a system, method, and streaming media service control functional entity for implementing streaming media services in an Internet Protocol Multimedia Subsystem (IMS).
  • IMS Internet Protocol Multimedia Subsystem
  • IMS the IMS of the all-IP service network architecture is introduced on the basis of the packet bearer network.
  • IMS is a subsystem superimposed on an existing packet domain in a Wideband Code Division Multiple Access (WCDMA) network.
  • WCDMA Wideband Code Division Multiple Access
  • This system uses a packet domain as its bearer channel for upper layer control signaling and media transmission, and uses the Session Initiation Protocol (SIP).
  • SIP Session Initiation Protocol
  • the protocol provides a rich multimedia service by separating the service control from the bearer control by utilizing the features of the SIP protocol, easy expansion, and convenient media combination.
  • the streaming media service is a new type of multimedia service that has developed rapidly in recent years.
  • the key technology for implementing streaming media services is streaming technology.
  • Streaming media services use streaming technology to transfer multimedia files, such as video and audio files, over a packet-switched network.
  • Streaming multimedia files using streaming technology allows you to play the information carried in these files without having to wait until all files have been downloaded.
  • the control of the streaming media service is completely implemented by the application server (AS) having the corresponding function. Therefore, the system cannot uniformly control the streaming media service, and the operator cannot uniformly deploy the streaming media service to provide users with rich streaming media services. Experience. At the same time, because the operator's system cannot provide basic streaming media service capabilities, such as session management of streaming media services, user interaction, etc., in order to provide streaming media services, service providers need to consider various aspects of streaming media services, thereby increasing It is difficult for service providers to provide streaming services. It reduces the openness of streaming services and the speed at which service providers provide streaming services. Summary of the invention
  • An embodiment of the present invention provides a system for implementing a streaming media service and a streaming media service control function entity, and a method for implementing a streaming media service, so that an operator's system can uniformly control the streaming media service. achieve.
  • the system for implementing the streaming media service includes: a user terminal UE, a call session control function CSCF, an application server AS, and a media server, where the UE is connected to the CSCF for information interaction, and the system further includes: Media Service Control Function Entity SSCF,
  • the CSCF is configured to receive a streaming media service request and a streaming media service end request, and forward the received request to the SSCF;
  • the SSCF is configured to determine a service delivery mode, and use the determined service delivery mode to control the media server to provide a streaming media service to the UE.
  • the streaming media service control function entity SSCF provided by the embodiment of the present invention includes: an information interaction unit and a service control function unit,
  • the information interaction unit is configured to receive a streaming media service request from the CSCF or the AS, and send the received request to the service control function unit;
  • the service control function unit is configured to use a service delivery mode to control the media server to provide a streaming media service to the UE by using the determined service delivery mode.
  • a method for implementing a streaming media service provided by an embodiment of the present invention, where the method sets an SSCF in the system, including the following steps:
  • the SSCF determines to obtain a service delivery mode, and uses the determined service delivery mode to control the media server to provide streaming media services to the UE.
  • Figure 1 is a system structure diagram for implementing a streaming media service
  • FIG. 2 is a system structural diagram of a streaming media service according to a first embodiment of the present invention
  • FIG. 3 is a system structural diagram of implementing a streaming media service according to a second embodiment of the present invention
  • FIG. 4 (a) is a third embodiment of the present invention
  • FIG. 4(b) is a system structural diagram of implementing a streaming media service according to a third embodiment of the present invention
  • FIG. 4(c) is a flowchart of implementing a streaming media service according to a fourth embodiment of the present invention
  • FIG. 4 (d) is a schematic structural diagram of an SSCF according to an embodiment of the present invention
  • FIG. 5 is a flow chart of implementing SSCF service control functions initiated by a terminal side according to an embodiment of the present invention
  • FIG. 6 is a flowchart of implementing SSCF unified session management function according to an embodiment of the present invention
  • FIG. 7 is a flowchart of implementing SSCF service decision function according to an embodiment of the present invention.
  • FIG. 8 is a flow chart of implementing SSCF user service interaction information processing function according to an embodiment of the present invention.
  • FIG. 9 is a flow chart of information interaction between different domain SSCFs according to an embodiment of the present invention.
  • FIG. 10 is a flow chart of implementing SSCF service control functions initiated by a network side according to an embodiment of the present invention. Mode for carrying out the invention
  • the system includes: a user equipment (UE), an IMS core (IMS Core), an application function, a user configuration server function (UPSF), a network attachment subsystem, and a resource admission control subsystem. , Media Resource Processing Function (MRFP) and IP Transport Network.
  • the IMS Core includes at least a Call Session Control Function (CSCF) consisting of a Proxy Call Session Control Function (P-CSCF) and a Query/Service Call Session Control Function (I/S-CSCF), and may also include a media resource control function (MRFC).
  • the application function includes at least one application server (AS), and may also include other application entities, such as a presentation server (PS, Presence Server) and the like.
  • the system may also include a media resource location function/media resource proxy function (MRLF/MRBF) such as MRLF/MRBF may be set in the IMS Core.
  • MRLF/MRBF media resource location function/media resource proxy function
  • the Media Resource Control Function (MRFC) and the Media Resource Processing Function (MRFP) are collectively referred to as a media resource function, which is equivalent to a media server.
  • the streaming media service implementation system and method and the streaming media service control function entity provided by the embodiments of the present invention implement the unified management of the system for streaming media services by setting the SSCF with the service control function in the system, so that the system can uniformly control the streaming media.
  • the system includes at least: a UE, a CSCF, an SSCF, an application server AS, and a media server.
  • the UE is connected to the CSCF for information interaction.
  • the CSCF is configured to receive a streaming media service request and a streaming media service end request, and forward the received request to the SSCF.
  • the streaming service request and the service end request are usually sent by the UE to the CSCF and forwarded by the CSCF to the SSCF. In the event of a service failure, the streaming service request and the service end request may also be sent by the AS.
  • the SSCF configured to receive a streaming media service request from the CSCF or an AS, obtain service delivery mode information, and control a media server to provide a streaming media service to the UE by using a corresponding service delivery mode; receiving the CSCF or AS from the CSCF or AS The streaming media service end request controls the media server to stop providing streaming media services to the UE.
  • the media server includes a media resource processing function (MRFP) and a media resource control function (MRFC), and the MRFC may or may not belong to the IMS Core.
  • the CSCF is part of the IMS Core and includes the Proxy Call Session Control Function (P-CSCF) and the Query/Service Call Session Control Function (I/S-CSCF).
  • the embodiment of the present invention implements unified control of the streaming media service by the operator system by introducing the SSCF, so that the operator system can uniformly control the streaming media service provided by the media server for the UE.
  • the SSCF introduced in the embodiment of the present invention can also implement a unified session management function, a service decision function, a service state management function, and a user service interaction management function, and the SSCF implements a streaming media service by performing information interaction with other functional entities in the system. Unified control.
  • FIG. 3 is a structural diagram of a system for implementing a streaming media service according to a second embodiment of the present invention.
  • the system includes: UE, IMS Core, User Configuration Server Function (UPSF), Streaming Media Support Function, Application Function, Resource Admission Control Subsystem, Media Resource Function Processor (MRFP), IP Transport Network, Network Attachment Subsystem, and the like.
  • UPSF User Configuration Server Function
  • Streaming Media Support Function Application Function
  • MRFP Media Resource Function Processor
  • IP Transport Network Network Attachment Subsystem
  • the IMS Core includes: a CSCF, an MRFC, and an MRLF/MRBF composed of a P-CSCF and an I/S-CSCF.
  • the streaming support functional entities include: SSCF, Context Manager (CM), Policy Manager (PM), Content Location Management Function (CLMF).
  • the application function includes at least one AS, and the application function may also include other application entities, such as a presentation server (PS, Presence Server) and the like.
  • the MRFC and MRFP in the system are collectively referred to as a media resource function, which is equivalent to a media server, and is used to provide streaming media service services for the UE.
  • the CSCF forwards the streaming media service request and the streaming media service end request from the UE to the SSCF, and forwards the response message from the SSCF to the UE;
  • the SSCF is configured to receive a streaming service request from the CSCF or the AS, and obtain service delivery mode information, such as multicast or unicast, and control the media server to provide a streaming media service for the UE by using a corresponding service delivery mode. At the same time, it is also possible to control the transition between different service delivery modes according to the requirements of the business.
  • SSCF can be from related functional entities in the streaming media system, For example, the AS obtains the service delivery mode information, and can also obtain the service delivery mode information directly from the service delivery mode indication sent by the UE, such as the service delivery mode indication carried in the streaming media service request.
  • the SSCF is further configured to receive a streaming service end request from the CSCF or the AS, and control the media server to stop providing the streaming service to the UE.
  • the SSCF may be further configured to obtain necessary service information of the related functional entity in the streaming media system, and transmit the same to the UE.
  • the necessary service information includes: content encryption key or rights object (RO) information in unicast, and/or RTP, RTSP connection address, port information; service and content key and/or multicast in multicast Address (MA) information.
  • ROI content encryption key or rights object
  • the SSCF also has a unified session management and media server selection function.
  • the SSCF is configured to establish a session for the received streaming media service request, select a corresponding media server, and release the corresponding session for the received streaming media service end request.
  • the establishing, by the SSCF, the session according to the received streaming service request includes: establishing a session between the UE and the selected media server, or establishing a session between the UE and the corresponding AS and the selected media server.
  • the SSCF may select an optimal media server for the UE.
  • the SSCF in this embodiment may be further configured to obtain information related to the selected media server from the information storage unit in the system, and according to The obtained information selects a corresponding media server for the received streaming media service request.
  • the information related to selecting a media server includes: media resource status information, and/or end user context information, and/or operator policy information, and/or user subscription information.
  • the information saving unit includes: a media resource status information saving unit, configured to save media resource status information, including media content distribution information and status information of the media server, Such as load information.
  • the media resource status information saving unit may be:
  • MRLF/MRBF MRLF/MRBF
  • CLMF MRMF
  • the MRLF/MRBF is used to collect and save the media resource status information of the media server, and may also send the collected media resource status information to the CLMF; the CLMF is used to save the media resource status information from the MRLF/MRBF, and may also be used for
  • the obtained media resource status information is processed, for example, into a prescribed format, and the media content is distributed in a location of a different media server into a PSI or CRID format.
  • the MRFCs in the system can also communicate through the P2P network to collect media resource status information.
  • the information storage unit includes a CM, configured to save context information of the terminal user, including location information of the terminal user, and/or online status information, and/or terminal capability information; and the SSCF acquires the context of the terminal user from the CM. information.
  • the information storage unit includes a PM for storing policy information of the operator for different users and/or different streaming media services, and the SSCF obtains the operator's policy information from the PM.
  • the information storage unit includes a user subscription information holding unit, which is an UPSF in the embodiment, and the UPSF is configured to save user subscription information, including user preference information, and/or user service subscription data; and the SSCF obtains user subscription information from the UPSF.
  • a user subscription information holding unit which is an UPSF in the embodiment
  • the UPSF is configured to save user subscription information, including user preference information, and/or user service subscription data
  • the SSCF obtains user subscription information from the UPSF.
  • the user subscription information storage unit may also be a separate streaming media service database for storing user subscription information in the system; or an AS that stores user subscription information.
  • the SSCF also has a service status management function.
  • the SSCF directly perceives or obtains user service status change information from other entities having user service status change awareness functions.
  • the user service status change information includes: channel switching information in the LTV, or VOD, Time shift TV In the VCR control information and the like, the acquired user service state change information is notified to the entity in the system that needs to obtain the service state change information, such as the PS or AS in the application function entity notified by switching the user to a new channel.
  • the service state aware entity may be a node of the media server or the access network, such as a gateway.
  • General Packet Radio Service Support Node/Digital Subscriber Line Access Multiplexer GGSN/DSLAM.
  • the SSCF further has a user service interaction information processing function, configured to receive service interaction information of the UE forwarded by the CSCF, process the received service interaction information, and send the processed service interaction information to the corresponding one connected to itself. Receiving, by the AS, the service interaction response information from the AS, and forwarding the received service interaction response information to the UE.
  • Interactive streaming services can be supported through user service interaction information processing functions.
  • the AS is further configured to receive service interaction information from the SSCF and return service interaction response information to the SSCF.
  • the streaming media service is implemented in the system shown in Figure 3, which facilitates the opening of the basic service capabilities of the streaming media service to third-party service providers, and facilitates the third-party service providers to conduct streaming media services.
  • the standard interface can be used for communication between the SSCF and the AS.
  • the AS is a SIP AS
  • the standard interface is a SIP interface.
  • a standard API interface such as a Parley interface, can be used.
  • the interface between the SSCF and the S-CSCF is an ISC interface based on the SIP protocol.
  • the SSCF is set independently. In practical applications, the SSCF can also be set in the AS, as shown in Figure 4 (a).
  • the SSCF is set up in the AS to enhance the functionality of the AS, enabling it to have business control, session management, business decisions, business state management, and user service interaction management.
  • the step of the SSCF transmitting the processed service interaction information to the corresponding AS connected to itself may be omitted.
  • the MRLF/MRBF in the system shown in Figure 3 or Figure 4 (a) is an optional entity.
  • the MRLF/MRBF can also be connected to the I/S-CSCF through the I/S-CSCF.
  • the SSCF or the CLMF in the streaming media support function performs information interaction; when the MRLF/MRBF is not included in the system, the media resource status information saving unit can only be
  • the MRFC collects and saves the media resource status information by the MRFC. If there are multiple MRFCs in the network, the MRFC and the MRFC can interact to complete the collection of media content distribution information in the entire network.
  • FIG. 4(b) is a system structural diagram of a streaming media service according to a third embodiment of the present invention, and FIG. 4(b) differs from the system shown in FIG. 3 only in the MRLF/MRBF in FIG. 4(b).
  • the I/S-CSCF Connected to the I/S-CSCF, the I/S-CSCF communicates with the streaming support function, rather than directly connected to the streaming support function. There may be interfaces between MRLF/MRBF in different domains.
  • FIG. 4(c) is a system structural diagram of a streaming media service according to a fourth embodiment of the present invention, and FIG. 4(c) is different from the system shown in FIG. 3 in that FIG. 4(c) does not include MRLF/MRBF.
  • the collection and storage of media resource status information is implemented by the MRFC in the system.
  • the MRFCs in the network can be connected to each other.
  • the MRFCs in different domains can also be connected to each other to complete cross-domain media content collection.
  • the SSCF in the system shown in the embodiment of the present invention includes at least: an information interaction unit and a service control function unit, as shown in FIG. 4(d).
  • the information interaction unit 401 is configured to receive a streaming media service request and a streaming media service end request from the CSCF or AS, and send the received request to the service control function unit 402;
  • the service control function unit 402 receives a streaming media service request from the information interaction unit 401, obtains service delivery mode information, and controls a media server to provide a streaming media service to the UE by using a corresponding service delivery mode;
  • the streaming media service end request of the information interaction unit 401 controls the media server to stop providing the streaming media service to the UE.
  • the service control function unit 402 may obtain the service delivery mode information from the AS, or may directly obtain the service delivery mode information from the service request sent by the UE.
  • Business control When the function unit 402 needs to send a streaming media service request or a streaming media service end request response message to the UE or the AS, the service control function unit 402 sends a response message to the information interaction unit 401, which is received by the information interaction unit 401.
  • the response message to the UE is forwarded to the UE through the CSCF or directly forwarded to the AS.
  • the service control function unit 402 is further configured to obtain necessary service information from a related function entity of the streaming media system, and send the same to the UE and/or the media server.
  • the necessary service information includes: a key or RO information required for content encryption in unicast, and/or RTP, RTSP connection address information; a service key and/or MA information in multicast.
  • the service control function unit 402 is further configured to send the received streaming media service request to the media server selection unit 403, and receive the selection from the media server. a result of the selection of the unit 403; establishing a session for the received streaming media service request; releasing the session corresponding to the received streaming media service end request;
  • the media server selecting unit 403 is configured to receive a streaming media service request from the service control function unit 402, select a media server or a media server network entry point for the received streaming media service request, and notify the selection result Service Control Function Unit 402.
  • the media server selecting unit 403 may be a first media server selecting unit, configured to receive a streaming media service request from the service control function unit 402, and obtain information related to selecting a media server, including media, from the information saving unit. Resource status information, and/or media content distribution information, and/or user subscription information, and/or end user context information, and/or operator policy information, and selecting media for the received streaming service request based on the obtained information
  • the server notifies the service control function unit 402 of the result of the selection.
  • the SSCF further includes: a service state change information notification unit 404, which itself perceives or acquires UEs from other entities.
  • the business status change information, and the acquired business status change information is notified to the entity that needs to obtain the business status change information.
  • the SSCF further includes: a service interaction information processing unit 405, configured to receive service interaction information of the UE forwarded by the CSCF, and process the received service interaction information.
  • a service interaction information processing unit 405 configured to receive service interaction information of the UE forwarded by the CSCF, and process the received service interaction information.
  • the service interaction information processing unit 405 is further configured to send the processed service interaction information to the corresponding AS connected to itself.
  • the embodiment of the present invention further provides a method for implementing a streaming media service, where the method sets the SSCF in the system, including the following steps:
  • the SSCF When receiving the streaming service request from the CSCF or the AS, the SSCF obtains the service delivery mode information, and controls the media server to provide the streaming media service to the UE by using a corresponding service delivery mode;
  • the SSCF controls the media server to stop providing the streaming media service to the UE.
  • the necessary service information includes a real-time transport protocol RTP connection of the unicast service and/or address port information of the real-time streaming protocol RTSP connection, and/or content protection required Key information;
  • the necessary service information includes: multicast address information of the multicast service and/or key information required for channel or multicast service protection.
  • the SSCF may obtain service delivery mode information from a streaming media service related functional entity, such as an AS, or may obtain the service delivery mode information directly from the streaming media service request sent by the UE; User's request for business, decision Use unicast or multicast delivery mode, or convert between unicast and multicast.
  • a streaming media service related functional entity such as an AS
  • User's request for business decision Use unicast or multicast delivery mode, or convert between unicast and multicast.
  • As a service if the number of requested users is less than a preset threshold, unicast is used for each user; if the number of requested users is not less than a preset threshold, multicast is used, and unicast to multicast conversion is completed. control.
  • the embodiment of the present invention further provides a method for implementing unified session management, service decision, service state management, and user service interaction management functions of the SSCF.
  • FIG. 5 is a flow chart of implementing SSCF service control function initiated by a terminal side according to an embodiment of the present invention, where the process includes the following steps:
  • Step 501 The UE sends a streaming media service request to the CSCF, where the request may carry the capability information of the UE.
  • the request may also carry indications of the service delivery mode, such as unicast Unicast service, multicast Muticast service.
  • Step 502 The CSCF forwards the streaming media service request from the UE to the SSCF.
  • Step 503 The SSCF obtains necessary service information, such as key information of the unicast service, multicast address information and/or key information of the multicast service, from related functional entities in the streaming media system.
  • Step 504 The SSCF obtains service delivery mode information from a related functional entity in the streaming media system, for example, adopting multicast or unicast delivery of the streaming media service.
  • the SSCF obtains the service delivery mode information from the corresponding functional entity of the streaming media service, such as the application server.
  • the SSCF may also directly obtain the service delivery mode information from the indication of the service delivery mode information sent by the UE. Or judging from other information carried by the UE, such as an IP address, etc., if the UE carries its own unicast IP address, it may be a unicast service; if the UE carries a multicast address, it may be a multicast service.
  • Step 505 the SSCF obtains a message according to the corresponding functional entity from the UE and the streaming media system.
  • the service delivery mode judgment, and/or control such as determining unicast or multicast, and correspondingly controlling the bearer layer to use multicast or unicast transmission services.
  • the delivery model supported by the service itself such as only supporting unicast, only supporting multicast, or supporting at the same time. and / or
  • Information in the streaming media service request such as delivery mode indication information, or information such as the IP address of the UE. and / or
  • the capabilities of the network where the UE is located such as only supporting unicast, only supporting multicast, or supporting at the same time.
  • This information can be carried in the streaming service request, or the SSCF can be obtained from other functional entities of the streaming system.
  • the foregoing determining factors may be obtained in multiple ways, such as being saved by the SSCF itself, obtained from a streaming media service request, or obtained from other functional entities of the streaming media system.
  • Step 506 The SSCF sends a streaming media service response to the CSCF, where the response carries information required by the specific service, such as key information of the unicast service, multicast address information of the multicast service, and/or key information.
  • Step 507 The CSCF forwards the streaming media service response from the SSCF to the UE.
  • Step 503 and step 504 in this embodiment do not have a fixed sequence, and the two steps may be performed simultaneously or at different times.
  • FIG. 6 is a flowchart of implementing a SSCF unified session management function according to an embodiment of the present invention, where the process includes the following steps:
  • Step 601 The UE sends a streaming media service request to the CSCF, where the request carries the requested service identifier, such as a content ID or a channel ID.
  • the requested service identifier such as a content ID or a channel ID.
  • Step 602 The CSCF forwards the streaming media service request from the UE to the SSCF.
  • the SIP Invite message can be used to send the streaming media service.
  • Step 603 The SSCF selects a media server to create and maintain a corresponding session for the received streaming media service request.
  • Step 604 The SSCF sends a streaming media service response to the CSCF.
  • Step 605 The CSCF forwards the streaming media service response from the SSCF to the UE.
  • Step 606 The UE uses the corresponding streaming media service.
  • Step 607 When the UE determines that the streaming media service can be ended, the UE sends a streaming media service end request to the CSCF.
  • Step 608 The CSCF sends a streaming media service end request from the UE to the SSCF. Step 609, the SSCF releases the session created in step 603 for the received streaming service request.
  • Step 610 The SSCF sends a streaming media service end response to the CSCF.
  • Step 611 The CSCF sends the received streaming media service end response to the UE.
  • FIG. 7 is a flowchart of implementing an SSCF service decision function according to an embodiment of the present invention, where the process includes the following steps:
  • Step 701 The UE sends a streaming media service request to the CSCF, where the request carries the service identifier of the request, such as the content ID or the channel ID, and may further carry the location information and the capability information of the UE.
  • the request carries the service identifier of the request, such as the content ID or the channel ID, and may further carry the location information and the capability information of the UE.
  • Step 702 The CSCF forwards the streaming service request from the UE to the SSCF.
  • Step 703 The SSCF obtains media resource status information of the media content according to the media content requested by the UE.
  • the SSCF may request media resource status information from the MRLF/MRBF, or MRFC, or CLMF, including the distribution of the media content on the media server and status information of the corresponding media server, such as load information.
  • Step 704 the SSCF obtains user subscription information, such as user preference information, and/or user service subscription data.
  • user subscription information such as user preference information, and/or user service subscription data.
  • the specific implementation manner of the SSCF to obtain the user subscription information depends on the location where the user subscription information is stored, such as the user subscription information may be stored in the UPSF, or stored in a separate streaming media service database, or stored in the application server. .
  • Step 705 The SSCF obtains user context information, including location information of the terminal user, and/or online status information, and/or terminal capability information, and the like.
  • the SSCF needs to obtain the above information from the context manager.
  • Step 706 The SSCF obtains the operator's policy information from the policy server.
  • the operator may have different policies for different users and different services, so the SSCF needs to obtain corresponding policy information from the policy server.
  • Step 707 The SSCF selects the best media server for the UE according to the information carried in the streaming media service request sent by the UE and the information related to the selected media server obtained from other functional entities.
  • the media content is very rich.
  • the SSCF can request the streaming media service of the user according to various information. Specific media server.
  • each media server network has one or more entry points.
  • Each media server network entry point may be a separate network entity or a media server in the media server network, and each media server network entry point stores media resource status information of the media server in the media server network under its jurisdiction, such as The location identifier of each media server, the stored media content, current status information, such as load information.
  • each media server network entry point has a network identifier, which may be in the form of an IP address or a URL.
  • the SSCF can select a suitable media server network entry point for the streaming service request based on various information and specific policies, rather than the final media server.
  • the SSCF forwards the received streaming media service request to the selected media server network entry point.
  • the selection of the specific media server depends on the specific media server network, and the SSCF obtains the selected result from the media server network entry point.
  • Each entry point stores media resource status information of its own network.
  • SSCF chooses an entry point based on various information and specific policies, rather than a specific media server.
  • the selection of the media server in step 707 may be based on the actual network deployment of the operator, or may be the entry point of the media server network.
  • the entry point selection can also be implemented by static configuration on the SSCF or by using a DNS-like query mechanism to return the address of the entry point.
  • step 707 the interaction between the SSCF and the selected media server or media server entry point is omitted. Whether the interaction process exists depends on the service delivery mode. If the service delivery mode is a unicast delivery mode, interaction is required to obtain the RTP and/or RTSP connection address information of the media server; if the service delivery mode is the multicast delivery mode, It may not be necessary to interact with the media server or media server network entry point, but directly return multicast address information.
  • Step 708 The SSCF sends a streaming media service response to the CSCF, where the response message carries the information of the optimal media server selected by the SSCF for the UE, such as connection address information and other service information.
  • Step 709 The CSCF forwards the streaming media service response from the SSCF to the UE.
  • SSCF can also implement business state management functions.
  • the SSCF implements the service state management function, which focuses on obtaining service state change information. There are two ways for the SSCF to obtain service state change information:
  • the first way If the service status of the UE changes, such as channel switching in LTV, or VCR control in VOD, Time Shift TV, etc., the signaling passes through the SSCF, and the 'J SSCF can directly sense the change of the service status.
  • An entity such as a media server, or a node of the access network, such as a GGSN/DSLAM, or the UE itself communicates, such as through subscription and notification, to obtain corresponding service state change information.
  • the SSCF may send the obtained user service state change information to the system to learn the user service.
  • the entity of the state change information is not limited to the SSCF.
  • the SSCF can use the Subscribe/Notify mechanism to exchange information with the entity that has the function of changing the state of the service.
  • the specific implementation steps are as follows:
  • the SSCF subscribes to the service state change information to the entity that has the function of changing the state of the service.
  • the entity having the function of sensing the change of the service state notifies the SSCF of the service state change information through the Notify message.
  • the SSCF can use the Subscribe/Notify mechanism to notify the entity that needs to know the change of the service status of the user.
  • the specific implementation steps are as follows:
  • the entity that needs to know the change of the service status of the user subscribes to the service status change information of the SSCF.
  • the learned service status change information is notified by the Notify message to the entity that needs to know the user service status change information.
  • FIG. 8 is a flowchart of implementing an SSCF user service interaction information processing function according to an embodiment of the present invention, where the process includes the following steps:
  • Step 801 The application server subscribes the service interaction information of the user to the SSCF.
  • the application server can subscribe to the service interaction information of the UE to the SSCF through the SIP Subscribe/Notify mechanism.
  • Step 802 After the SSCF establishes a streaming media service session for the UE, the UE sends the service interaction information to the CSCF.
  • Step 803 The CSCF sends the service interaction information from the UE to the SSCF.
  • Step 804 The SSCF processes the received service interaction information.
  • the SSCF processes the received service interaction information, including: associating the information of the specific UE with the specific service according to the user ID, the session ID, and the service ID information.
  • statistics such as business interaction information, filtering, and the like can be performed.
  • Step 805 The SSCF transmits the processed service interaction information to the corresponding AS.
  • the SSCF may transmit the received service interaction information to the corresponding AS through the SIP Notify message.
  • Step 806 The AS returns service interaction response information to the SSCF.
  • Step 807 The SSCF sends the service interaction response information from the AS to the CSCF.
  • Step 808 The CSCF sends the service interaction response information from the SSCF to the corresponding UE.
  • Steps 801, 806 to 808 in this embodiment are optional steps, and the order of step 801 is not fixed, as long as the SSCF performs the service interaction information before sending it to the corresponding AS.
  • the system in the above embodiment only includes one SSCF.
  • the unified system may include multiple SSCFs located in different domains.
  • the SSCFs in different domains may directly exchange information or perform information interaction through the CSCF in the system. .
  • FIG. 9 is a flowchart of information interaction between different domain SSCFs according to an embodiment of the present invention.
  • two SSCFs located in different domains namely SSCF-A and SSCF-B, are respectively used.
  • the SSCFs in the domain may belong to the same carrier or may belong to different operators.
  • the process includes:
  • Step 901 The UE sends a streaming media service request to the CSCF, where the request may carry user location information.
  • Step 902 The CSCF forwards the streaming service request from the UE to the SSCF-A.
  • Step 903 The SSCF-A determines that the content requested by the received streaming media service request is provided by another domain, and forwards the received streaming media service request to another domain.
  • Step 904 SSCF-B selects a media server for the received request and forwards the streaming service request to the selected media server.
  • the SSCF-B may also select a media server network entry point for the received request, and forward the received request to the selected media server network entry point, and the media server network entry point forwards the request to the media server.
  • the corresponding media server may also select a media server network entry point for the received request, and forward the received request to the selected media server network entry point, and the media server network entry point forwards the request to the media server.
  • the corresponding media server may also select a media server network entry point for the received request, and forward the received request to the selected media server network entry point, and the media server network entry point forwards the request to the media server.
  • the corresponding media server may also select a media server network entry point for the received request, and forward the received request to the selected media server network entry point, and the media server network entry point forwards the request to the media server.
  • the corresponding media server may also select a media server network entry point for the received request, and forward the received request to the selected media server network entry point, and the media server network entry point forwards the request
  • Step 905 The media server sends a streaming media service response to the SSCF-B.
  • Step 906 The SSCF-B sends the received streaming media service response to the SSCF-A.
  • Step 907 The SSCF-A sends the received streaming media service response to the CSCF.
  • Step 908 The CSCF forwards the received streaming media service response to the UE.
  • SSCF-A and SSCF-B directly exchange information. In actual applications, the two can also exchange information through the CSCF in the system.
  • the specific process is: SSCF-A firstly sends the received streaming media service request to the CSCF of the local domain, and the CSCF of the local domain forwards it to the CSCF of the destination domain, and then forwards it to the SSCF-B by the CSCF of the destination domain.
  • Other media server selection and session request procedures are similar to the embodiment shown in FIG.
  • the foregoing embodiment can reflect how the user accesses the streaming media service of the roaming/nomadic land after the roaming/nomadic, for example, the SSCF-A is regarded as the streaming media service control entity of the user's home location, and the SSCF-B is regarded as the user.
  • Roaming traffic control entity through SSCF-A
  • the streaming media session establishment process completes providing the roaming/nomadic streaming media service to the user, and further, the above manner can also be used to complete the user whether roaming/nomadic And enjoy the streaming media business provided by other places, such as the location of SSCF-B.
  • the SSCF can perform service delivery mode determination and establishment of a streaming media service according to the received streaming media service request from the UE or the AS.
  • the SSCF may trigger a service delivery mode judgment according to its own service policy or service logic, and initiate a streaming media service. .
  • the process includes the following steps:
  • Step 1001 The SSCF obtains service information from a corresponding functional entity of the streaming media system, such as a presence server Presence server.
  • Step 1002 The SSCF obtains service delivery mode information from a corresponding functional entity of the streaming media system.
  • steps 1001 and 1002 are optional steps.
  • Step 1003 The SSCF performs service delivery mode determination, and/or service control according to information obtained from a corresponding functional entity of the streaming media system, and/or information stored by itself. For example, if you need to provide streaming services for one user, you may adopt a unicast service delivery mode. If you need to provide services for multiple users, you may adopt a multicast delivery mode or a unicast delivery mode.
  • Step 1004 The SSCF sends a streaming media service request to the CSCF. Depending on the service delivery model, it may be a unicast service request or a multicast service request.
  • Step 1005 The CSCF forwards the streaming service request from the SSCF to the UE.
  • Step 1006 The UE returns a streaming media service response to the SSCF.
  • Step 1007 The CSCF forwards the streaming media service response from the UE to the SSCF.
  • the UE can enjoy the streaming media service.
  • information interaction between the corresponding functional entity and the SSCF of the streaming media system may be performed through the CSCF, and the information interaction is directly learned.
  • the SSCF initiates a streaming service request to the UE.
  • the SSCF can notify the streaming server that the streaming server initiates a streaming service request to the terminal.
  • the embodiment of the present invention sets the SSCF in the streaming media service implementation system, and when the SSCF receives the streaming media service request, determines the service delivery mode, and uses the determined service delivery mode to control the media server to the UE.
  • Providing a streaming media service when the SSCF receives the streaming media service end request, controlling the media server to stop providing the streaming media service to the UE; or, the SSCF may determine the service payment module based on its own service policy, and adopt the determined
  • the service delivery mode controls the media server to provide streaming media services to the UE. Therefore, the streaming media service implementation system, the method, and the streaming media service control function entity provided by the embodiments of the present invention can implement unified control of the operator's system for streaming media services.
  • the embodiment of the present invention implements unified control of streaming media services by using information exchange between the SSCF and other functional entities of the streaming media system, including service control functions, session management functions, service decision functions, service state maintenance functions, and user interaction management.
  • SSCF implements integrated and unified management of streaming media services, streamlining the implementation process of streaming media services, and provides a feasible method for streaming media systems to open interfaces and functions to third-party service providers. Therefore, the development of streaming media services is more flexible and flexible, which is conducive to the rapid development and deployment of streaming media services.
  • the method, system, and SSCF provided by the embodiments of the present invention can be applied not only to the streaming media service but also to the IPTV service.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Système et procédé de mise en oeuvre de service multimédia en flux, et entité de fonction de commande de ce service (SSCF), le procédé comprenant les étapes suivantes: détermination de mode de fourniture de service par établissement de la fonction SSCF dans le système pour la mise en oeuvre du service multimédia en flux, utilisation de ce mode déterminé pour commander le serveur multimédia et assurer ainsi la fourniture d'un service multimédia en flux à un équipement utilisateur (UE); et commande du serveur multimédia pour interrompre la fourniture du service multimédia en flux à l'UE lorsque la fonction SSCF a reçu une demande de fin de service multimédia en flux de la part de CSCF ou d'AS. De plus, la fonction SSCF comporte une fonction de gestion de session unifiée, une fonction de décision de service, une fonction de gestion d'état de service et une fonction de traitement d'information interactive de service utilisateur.
PCT/CN2008/070160 2007-01-22 2008-01-22 Système et procédé de mise en oeuvre de service multimédia en flux, et entité de fonction de commande de ce service WO2008089702A1 (fr)

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CN101854288A (zh) * 2009-04-01 2010-10-06 工业和信息化部电信传输研究所 一种电信网中的流媒体控制方法和系统
JP5649505B2 (ja) * 2011-04-19 2015-01-07 株式会社東芝 同期制御システム
CN105376194B (zh) * 2014-08-15 2019-03-26 中国电信股份有限公司 实时通信方法、系统和平台设备
CN106790215B (zh) * 2017-01-10 2021-10-26 厦门雅迅网络股份有限公司 一种对等业务交互控制方法及系统
CN110167092B (zh) * 2018-02-11 2020-09-11 大唐移动通信设备有限公司 一种业务迁移的方法及装置

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