WO2009052760A1 - Procédé, système et dispositif servant à établir le service de télévision en différé dans un service de radiodiffusion - Google Patents

Procédé, système et dispositif servant à établir le service de télévision en différé dans un service de radiodiffusion Download PDF

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Publication number
WO2009052760A1
WO2009052760A1 PCT/CN2008/072742 CN2008072742W WO2009052760A1 WO 2009052760 A1 WO2009052760 A1 WO 2009052760A1 CN 2008072742 W CN2008072742 W CN 2008072742W WO 2009052760 A1 WO2009052760 A1 WO 2009052760A1
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WO
WIPO (PCT)
Prior art keywords
service
time
shifted
request
scf
Prior art date
Application number
PCT/CN2008/072742
Other languages
English (en)
Chinese (zh)
Inventor
Jun Yan
Xiaoyan He
Jianfeng Zhong
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
Priority claimed from CN2007101868755A external-priority patent/CN101415106B/zh
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009052760A1 publication Critical patent/WO2009052760A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • 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
    • 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
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4333—Processing operations in response to a pause request
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, system, and apparatus for establishing a time shift television service in a broadcast service. Background technique
  • IPTV Internet Protocol Television
  • IPTV Internet Protocol Television
  • TCP Transmission Control Protocol
  • IP Internet Protocol
  • IP IMS IP Multimedia Subsystem
  • PSTN Public Switched Telephone Network
  • ISDN Integrated Services Digital Network
  • GSM Global Systems for Mobile communications
  • CDMA Code Division Multiple Access
  • NASS Network Attachment Sub-System
  • RACS Resource and Admission Control Subsystem
  • the IMS-based IPTV architecture will directly reuse the relevant functional entities of the IMS, and support the IPTV service by appropriately adding new functional entities and expanding the related functions of the existing functional entities.
  • FIG. 1 is a schematic diagram of networking of an IMS-based IPTV architecture in the prior art.
  • each IPTV service function consists of a pair of IPTV SCF (Service Control Functions) and IPTV MF (Media Functions).
  • the SCF is a SIP (Session Initiated Protocol) application server.
  • the tasks include: (1) authorization during session initialization; (2) implementing a modification process to check user data to determine whether to allow user access. The business; (3) account control; (4) select the corresponding MF.
  • the MF is responsible for the control and delivery of media streams and can be divided into MCF (Media Control Functions) and MDF (Media Distribute Functions).
  • the tasks of the MCF mainly include: (1) processing the control of the media stream; (2) monitoring the state of the MDF (optional); (3) managing the interaction with the UE (User Equipment); (4) at the MCF When controlling multiple MDFs, select an MDF; (5) accurately perceive the distribution of the status and content of different MDFs; (5) generate billing information.
  • the tasks of the MDF mainly include: (1) processing the delivery of the media stream; (2) reporting the status to the MCF (optional).
  • SCF and MF are functional entities that implement the following services: CoD (Content on Demand), BC (Broadcast Control), and PVR (Personal Video Recorder).
  • CoD is an on-demand service in IPTV. It implements its service control function through CoD-SCF in SCF, implements its media control function through CoD-MCF in MF and implements its media delivery function through CoD-MDF.
  • BC is a broadcast service in IPTV. It implements its service control function through BC-SCF in SCF, implements its media control function through BC-MCF in MF and realizes its media delivery function through BC-MDF.
  • PVR is The personal video recorder service in IPTV realizes its service control function through PVR-SCF in SCF, realizes its media control function through PVR-MCF in MF and realizes its media delivery function through PVR-MDF. The PVR service provides the recording function of the video media stream.
  • the network-based PVR refers to: the network allocates a certain storage space for the user, and the network records the user. The media features to be recorded, and play them according to the user's wishes.
  • the CoD-SCF, the BC-SCF, and the PVR-SCF exchange messages with the UE through the IMS, and the media control messages between the CoD-MCF, the BC-MCF, and the PVR-MCF and the UE interact with each other through the reference point.
  • the media data between the CoD-MDF, BC-MDF, and PVR-MDF and the UE interacts with the reference point through Xc,.
  • an SDF Service Discover Function
  • an SSF Service Select Function
  • the multicast control function is included in the TPF (Transport Processing Functions); user data is stored in the UPSF (User Property Server Function).
  • the session modification request is sent to the SCF, and the session modification request may be a modification request of the BC session, or may be a time-shifted TV when the user performs a control operation such as suspending the broadcast service. (in this article refers to the BC with Trick Play) business establishment request.
  • the SCF determines whether the session modification request sent by the UE is a modification request of the BC service or a request for the establishment of the time-shifted TV service, thereby causing the time-shifted TV service. Cannot be established normally. Summary of the invention
  • Embodiments of the present invention provide a method and system for establishing a time shift television service in a BC And the device, the time-shifted TV service is normally established in the BC.
  • an embodiment of the present invention provides a method for establishing a time shift television service in a broadcast service, including:
  • the service control function SCF receives the session modification request sent by the user equipment UE, and carries information identifying the time-shifted TV service establishment request;
  • the SCF initiates the establishment of the time-shifted TV service when determining that the session modification request is a time-shift television service establishment request according to the information identifying the time-shifted television service establishment request.
  • the embodiment of the present invention further provides a method for determining to switch back to the BC service from the time-shifted TV service, including the following steps:
  • the service control function SCF receives the session modification request sent by the user equipment UE, and carries the request information that the identifier is switched back to the BC service from the time-shifted TV service;
  • the SCF cuts back the request information of the BC service from the time-shifted TV service, and determines that the session modification request is a switch-back request of the time-shifted TV service, and initiates a switch-back operation of the time-shifted TV service to the BC service.
  • the embodiment of the present invention further provides a system for establishing a time shift television service in a broadcast service, including: a service control function SCF entity and a user equipment UE,
  • the UE is configured to send a session modification request to the SCF entity, where the information that identifies the time-shifted TV service establishment request is carried;
  • the SCF entity is configured to receive the session modification request sent by the UE, and according to the information identifying the time-shifted TV service establishment request, determine that the session modification request is a time-shift television service establishment request, initiate a time-shifted television The establishment of business.
  • an embodiment of the present invention further provides a service control function SCF entity, including a receiving module, a determining module, and an initiating module.
  • the receiving module is configured to receive a session modification request sent by the user equipment UE, where the information that identifies the time-shifted TV service establishment request is carried;
  • the determining module is configured to: when the session modification request is a request for establishing a time-shifted TV service according to the session modification request of the receiving module, the initiating module initiates a request for establishing a time-shifted TV service.
  • the SCF receiving The session modification request sent by the UE carrying the identifier time-shifted TV service establishment request information, according to the time-shifted television service establishment request information, determines that the session modification request is a time-shift television service establishment request, and initiates the establishment of the time-shifted TV service. Therefore, the SCF can determine whether the received session modification request is a modification request of the BC service or a request for establishing the time-shifted TV service in the BC, thereby realizing the normal establishment of the time-shifted TV service.
  • FIG. 1 is a schematic diagram of a networking diagram of an IMS-based IPTV architecture in the prior art
  • FIG. 2 is a flowchart of a method for establishing a time-shifted TV service in a BC according to an embodiment of the present invention
  • FIG. 3 is a BC in the embodiment of the present invention.
  • FIG. 4 is a flow chart of a method for establishing a time-shifted TV service in a BC according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of a method for establishing a time shift television service in a BC according to Embodiment 3 of the present invention.
  • FIG. 6 is a flowchart of a method for switching back to the BC service in the time-shifted TV service of the BC according to Embodiment 4 of the present invention. detailed description
  • FIG. 2 is a flowchart of a method for establishing a time shift television service according to an embodiment of the present invention. As shown in Figure 2, the method includes:
  • step 200 the SCF receives a session modification request sent by the UE, where the information carries the information identifying the time-shifted TV service establishment request;
  • step 201 according to the information identifying the time-shifted TV service establishment request in the request, when the session modification request is determined to be a time-shift television service establishment request, the establishment of the time-shifted TV service is initiated.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the information identifying the time-shifted TV service establishment request in this embodiment is the service identifier of the time-shifted TV service, and the SCF determines whether the session modification request is a time-shifted TV service establishment request according to the service identifier in the session modification request.
  • FIG. 3 is a flow chart of a method for establishing a time shift television service in a BC according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:
  • Step 300 The UE sends a session modification request carrying the service identifier to the SCF by using an invitation (relnvite) of the SIP protocol.
  • the UE sends a session modification request message to the SCF through the Core IMS.
  • the description in this step and the following description simplifies the communication between the UE and the SCF through Core IMS to communicate between the UE and the SCF.
  • the UE uses the defined header field to carry the service identifier of the time-shifted TV service.
  • P-Preferred-Service urn:um-xxx: TsTV.TISPAN.IPTV header field, where "TsTV.TISPAN.IPTV" is the service identifier of the time-shifted TV service.
  • TsTV.TISPAN.IPTV is the service identifier of the time-shifted TV service.
  • P-Preferred-Service can also be used: urn:urn-xxx:broadcast.tispan.iptv and Accept-Contact:urn: urn-xxx:broadcast .tispan.iptv-application-trickplay also indicates that the session modification request is a request for the establishment of a time-shifted TV service in BC, where "broadcast.tispan.iptv” and "broadcast.tispan.iptv-application-trickplay" Combined as a business identifier for time-shifted TV services in BC.
  • the urn-xxx is the number assigned later when the service identifier is registered in the IANA (Internet Assigned Numbers Authority).
  • Step 301 The SCF determines, according to the service identifier in the relnvite message, that the session modification request is a request for establishing a time-shifted TV service.
  • P-Preferred-Service urn: urn-xxx: broadcast.tispan.iptv
  • Accept-Contact urn: urn-xxx: broadcast.tispan.iptv - application-trickplay, determine that the session tampering request message is Request to establish a mobile TV service.
  • the method is modified according to the method of modifying the BC service in the prior art. Let me repeat.
  • Step 302 The SCF sends an initial setup request of the time-shifted TV service to the MCF through an Invite message of the SIP protocol.
  • the P-Preferred-Service urn: urn-xxx: broadcast .tispan.
  • iptv header field in step 301 is modified to the P-Asserted-Service:urn:urn-xxx:broadcast.tispan.iptv header field, A request to establish a time-shifted TV service is sent to the MCF.
  • Step 303 After establishing the time-shifted TV service, the MCF and the MDF return a setup response 200 OK to the SCF, and the SCF returns a setup response 200 OK to the UE, and establishes a media channel between the UE and the MDF.
  • the embodiment carries the service identifier in the session modification request message, so that The SCF can determine that the received session request message is a setup request for the time-shifted TV service, so that the time-shifted TV service in the BC can be established normally.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the information identifying the time-shifted TV service request is a newly defined header field
  • the SCF determines, according to the newly defined header field carried in the session modification request, whether the session request message is a request for establishing a time-shifted TV service in the BC.
  • Step 400 The UE sends a session modification request carrying the newly defined header field to the SCF by using the relnvite message of the SIP protocol.
  • the newly defined Iptv-Service-Type: TsTV header field in the SIP message indicates that the session modification request message is a request for establishing a time-shifted TV service in the BC.
  • Step 401 The SCF determines, according to the newly defined header field in the relnvite message, that the session modification request is a request for establishing a time-shifted TV service.
  • the UE and the SCF can identify the header field Iptv-Service-Type that identifies the time-shifted TV service establishment request: TsTV.
  • the SCF receives the session modification request, it finds that the request carries the newly defined header field Iptv-Service-Type: In the case of TsTV, it is determined that the session modification request message is a request for establishing a time-shifted TV service.
  • the SCF determines that the session modification request message is not the time-shifted TV service establishment request, and is modified according to the prior art.
  • the method flow of the BC service is performed and will not be described here.
  • Steps 402 to 404 The SCF sends an initial setup request for the time-shifted TV service to the MCF through the Invite message of the SIP protocol. After the MCF controls the MDF to establish the media resource required for the time-shifted TV service, the SCF returns a setup response to the SCF, 200 OK, by the SCF. The establishment response 200 OK is returned to the UE, and the media channel between the UE and the MDF is established.
  • the newly defined header field that identifies the time-shifted TV service establishment request is carried in the session modification request message, so that the SCF can determine that the received session request message is a request for establishing a time-shifted TV service, thereby making the BC
  • the time-shifted TV service can be established normally.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the SCF determines, according to the unicast media description information carried in the session modification request, that the session request message is a request for establishing a time-shifted TV service.
  • FIG. 5 is a flowchart of a method for establishing a time shift television service in a BC according to Embodiment 3 of the present invention. As shown in FIG. 5, the method includes the following steps:
  • Step 500 The UE sends a session modification request carrying the unicast media description information to the SCF by using the relnvite message of the SIP protocol.
  • the port number in the unicast media description information carried in the port is not 0, indicating that this is a new unicast media stream.
  • the media line information in the SDP (Session Description Protocol) description of the relnvite carries the unicast media description information.
  • the unicast media description information of the UE may be used to establish an RTP (Real Time Transmission Protocol) stream channel or an RTSP (Real Time Stream Protocol) control channel, where the UE provides media information.
  • RTP Real Time Transmission Protocol
  • RTSP Real Time Stream Protocol
  • the unicast media description information is used to establish an RTP stream channel:
  • the media line information in the SDP description may be:
  • 10.12.1.2 is the address information in the unicast media description of the UE.
  • the media line information in the SDP description may be:
  • 224.12.1.2 and 224.12.3.45 are the multicast addresses of the BC service
  • 10.12.1.2 is the unicast media description information of the UE.
  • the media line information in the SDP description may be:
  • Step 501 When the session is a session of the BC service, the SCF determines, according to the unicast media description information in the relnvite message, that the session modification request is a request for establishing a time-shifted TV service.
  • the class D IP address in the range of 224.0.0.0-239.255.255.255 is a multicast address
  • the IP address outside the range of 224.0.0.0-239.255.255.255 is a unicast address.
  • the SCF when the SCF receives the session modification request, it finds that the SDP description carries the IP address outside the range of 224.0.0.0-239.255.255.255, that is, the SDP description carries the unicast media description information, and When the port number is non-zero, it is determined that the session modification request is a request for establishing a time-shifted TV service.
  • the SCF determines whether it is a multicast address according to whether the first 8 Bits of the address information is 1111 1111, that is, if the address information is judged to be When FF is started, it can be determined that the address is a multicast address, otherwise it is determined that the address is a unicast address.
  • the SCF does not find the IP unicast media description information or the port number in the corresponding m line is 0 in the SDP description of the session modification request, it is determined that the session modification request message is not the time-shifted TV service establishment. The request is then executed according to the method of modifying the BC service in the prior art, and details are not described herein again.
  • Step 502 to step 504 The SCF sends an initial setup request for the time-shifted TV service to the MCF through the Invite message of the SIP protocol. After the MCF controls the MDF to establish the media resource required for the time-shifted TV service, the SCF returns a setup response to the SCF, 200 OK, by the SCF. The establishment response 200 OK is returned to the UE, and the media channel between the UE and the MDF is established.
  • the specific process of establishing a time shift service by the SCF, the MCF, and the MDF is the same as that of the prior art, and is not described here.
  • the SDP description in this embodiment is only an example, and other changes may be made in the actual application, as long as the unicast media description information can be carried.
  • the SCF receives the session modification request sent by the user equipment UE, and carries the request information that the identifier is switched back to the BC service from the time-shifted TV service; the SCF switches back to the BC service from the time-shifted TV service according to the identifier.
  • the request information is used to determine that the session modification request is a switch-back request of the time-shifted TV service, and initiates a switch-back operation of the time-shifted TV service to the BC service.
  • the request information that the portable identifier is switched back to the BC service from the time-shifted TV service is: a deletion indication of a unicast media stream required to establish a time-shifted television service, and the unicast medium required for establishing a time-shifted television service
  • the deletion of the flow indication is a port number in the unicast media description; when the port number in the unicast media description is 0, the session modification request is a switchback request of the time shift service.
  • the unicast media stream of the UE is a media transmission channel or a media control channel.
  • FIG. 6 is a flowchart of a method for cutting back to a BC service in a time-shifted TV service of a BC according to Embodiment 4 of the present invention, including the following steps:
  • Step 600 The UE sends a session modification request carrying the UE unicast media description information and the multicast media description information to the SCF by using the relnvite message of the SIP protocol.
  • the media line information in the SDP description of the renvite where the port number of the unicast media description information carried is 0, and the number of BC services carried therein is The port number in the broadcast media description information is non-zero.
  • the port number in the unicast media description information is 0, indicating that the unicast media stream needs to be deleted.
  • the unicast media description information of the UE may be the unicast media description information provided by the UE in the media information when the BC time-shifted TV service is established to establish an RTP stream channel or an RTSP control channel.
  • the unicast media description information is used to establish an RTP flow channel, and the unicast media description information in the SDP description may be:
  • Step 601 When the currently established session is a session of the BC time-shifted TV service, the SCF uses the port number in the unicast media description information in the renvv message to be 0, and represents the BC channel. The port number in the broadcast media description information is not 0, and the session modification request is determined to be a switch-back request of the time-shifted TV service to the BC service.
  • Class D IP grounds within the range of 224.0.0.0-239.255.255.255
  • the address is a multicast address
  • the IP address outside the range of 224.0.0.0-239.255.255.255 is a unicast address.
  • the SCF receives the session modification request, and finds that the SDP description carries the unicast address with the port number 0, and carries the multicast address with the port number other than 0, the session modification is determined.
  • the SCF determines whether the address is a multicast address according to whether the first eight Bits of the address information are 1111 1111, that is, if it is determined that the address information starts with FF, the address is determined to be a multicast address, otherwise Make sure the address is a unicast address.
  • Step 602 to step 604 The SCF sends a release request of the time-shifted TV service to the MCF through the Bye message of the SIP protocol, and the MCF controls the MDF to release the media resource occupied by the original time-shifted TV service, and returns a setup response 200 OK to the SCF.
  • the SCF will return a response 200 OK to the UE to complete the release of the media channel between the UE and the MDF.
  • the specific process of the SCF to establish the BC service is the same as the prior art, and is not described here.
  • the SDP description in this embodiment is only an example, and other changes may be made in the actual application, as long as the unicast media description information and the multicast media description information can be carried.
  • the SCF learns that the session modification request is a time-shifted TV establishment request, so this embodiment implements The normal establishment of the time-shifted TV service in BC.
  • the embodiment of the invention further provides a system for establishing a time shift television service in a broadcast service, including a UE and an SCF entity.
  • the UE is configured to send a session modification request to the SCF entity, where the information carries the information identifying the time-shifted TV service establishment request, and the SCF entity is configured to receive the session modification request sent by the UE, according to the identifier for the time-shifted TV service establishment request.
  • the information when determining that the session modification request is a request for establishing a time-shifted TV service, initiates establishment of a time-shifted TV service.
  • the SCF entity includes a receiving module and a determining module, where the receiving module is configured to receive a session modification request sent by the UE, where the bearer time-shifted TV service is established
  • the requesting information is used by the initiating module to initiate a time-shifting TV service establishment request when the session modification request is a time-shifted TV service establishment request according to the session modification request of the receiving module.
  • the initiating module further modifies the defined header field carrying the information identifying the time-shifted TV service establishment request, it is carried in the establishment request of the time-shifted TV service.
  • the SCF receives the session modification request that carries the identifier time-shifted TV service establishment request information sent by the UE, and determines the time-based television service establishment request information according to the session modification request information.
  • the session modification request is a request for establishing a time-shifted TV service
  • the establishment of the time-shifted TV service is initiated, so that the SCF can determine whether the received session modification request is a modification request of the BC service or a request for establishing the time-shifted TV service in the BC. Therefore, the normal establishment of the time-shifted TV service can be realized.
  • the present invention can be implemented by hardware or by software plus a necessary general hardware platform.
  • the technical solution of the present invention may be embodied in the form of a software product stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

Abstract

Le mode de réalisation de l'invention concerne un procédé servant à établir le service de télévision en différé dans un service de radiodiffusion, comprenant les étapes suivantes : la fonction de contrôle de service (SCF) reçoit la demande de modification de session qui transmet depuis l'équipement de l'utilisateur (UE), celle-ci incluant les informations d'identification de la demande d'établissement du service de télévision en différé ; lorsque la SCF considère que la demande de modification de session est la demande d'établissement du service de télévision en différé sur la base des informations d'identification de la demande d'établissement du service de télévision en différé, elle lance l'établissement du service de télévision en différé. L'invention concerne également un système servant à établir le service de télévision en différé dans le service de radiodiffusion et une entité SCF. Utiliser l'invention peut avoir pour conséquence que, lorsque la SCF considère que la demande de modification de session reçue est la demande d'établissement du service de télévision en différé, elle lance l'établissement du service de télévision en différé, de façon à mettre en place l'établissement du service de télévision en différé normalement.
PCT/CN2008/072742 2007-10-19 2008-10-17 Procédé, système et dispositif servant à établir le service de télévision en différé dans un service de radiodiffusion WO2009052760A1 (fr)

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Application Number Priority Date Filing Date Title
CN200710181380 2007-10-19
CN200710181380.3 2007-10-19
CN200710186875.5 2007-11-21
CN2007101868755A CN101415106B (zh) 2007-10-19 2007-11-21 在广播业务中建立时移电视业务的方法、系统及装置

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