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WO2010075698A1 - 一种节目切换的方法,系统和装置 - Google Patents

一种节目切换的方法,系统和装置 Download PDF

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Publication number
WO2010075698A1
WO2010075698A1 PCT/CN2009/073596 CN2009073596W WO2010075698A1 WO 2010075698 A1 WO2010075698 A1 WO 2010075698A1 CN 2009073596 W CN2009073596 W CN 2009073596W WO 2010075698 A1 WO2010075698 A1 WO 2010075698A1
Authority
WO
WIPO (PCT)
Prior art keywords
program
control module
switched
media
media server
Prior art date
Application number
PCT/CN2009/073596
Other languages
English (en)
French (fr)
Inventor
张园园
石腾
乐培玉
田永辉
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2010075698A1 publication Critical patent/WO2010075698A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/173Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309Transmission or handling of upstream communications
    • H04N7/17318Direct or substantially direct transmission and handling of requests
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/61Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/613Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for the control of the source by the destination
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/65Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/472End-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
    • H04N21/47202End-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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network 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 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643Communication protocols
    • H04N21/6437Real-time Transport Protocol [RTP]

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, system and apparatus for program switching. Background technique
  • the fast switching of the program is based on the fact that the content before and after the switching is in the same media server; when the programs before and after the switching are not in the same media server, the switching speed is slow and the user experience is poor.
  • the present invention provides a method, system and apparatus for program switching, which solves the problem of slow program switching speed and poor user experience.
  • a program switching method includes: receiving a program switching request sent by a terminal, where the program switching request includes a program identifier to be switched by the terminal; and determining, according to the program identifier, that the program to be switched is not in a media server currently playing the program for the terminal;
  • the program identifier establishes a real-time streaming protocol link between the media server where the program to be switched is located, so that the media server where the program to be switched is located plays the switched program to the terminal according to the program identifier.
  • a method for program switching comprising: receiving a program switching request sent by a user, determining that the program to be switched is not in a program list returned by the media server, and transmitting a program switching request to a media control module to which the media server where the program to be switched is located,
  • the real-time streaming protocol RTSP link is established by the media control module to which the media server to which the program to be switched is located belongs to the media server where the program to be switched is located.
  • a program switching system comprising: a media control module, configured to receive a program switching request sent by a terminal, where the program switching request includes a program identifier to be switched; The switched program is not in the media server currently playing the program for the terminal; and according to the program identifier, a real-time streaming protocol RTSP link is established between the media server where the program to be switched is located; and the media server is configured to play the terminal according to the program identifier.
  • the program after switching.
  • a media control module comprising: a receiving module, configured to receive a program switching request sent by the terminal, where the program switching request includes a program identifier to be switched by the terminal; and a determining module, configured to determine, according to the program identifier, that the program to be switched is not currently a media server in which the terminal plays the program; establishing a module, according to the program identifier, establishing a real-time streaming protocol RTSP link between the media server where the program to be switched is located, so that the media server where the program to be switched is located is based on the program identifier The switched program is played to the terminal.
  • a real-time streaming protocol is initiated to the media server where the program to be switched is located.
  • the RTSP link setup request enables fast switching between different media servers.
  • FIG. 1 is a schematic diagram of a basic process of a program switching method according to an embodiment of the present invention
  • FIG. 2 is a basic flow chart of another program switching method according to an embodiment of the present invention
  • FIG. 3 is a basic block diagram of a program switching system according to an embodiment of the present invention
  • FIG. 4 is a basic block diagram of a media control module according to an embodiment of the present invention.
  • FIG. 5 is a basic flowchart of a program switching method according to an embodiment of the present invention.
  • FIG. 6 is a basic flowchart of another program switching method according to an embodiment of the present invention.
  • FIG. 7 is a basic flowchart of another program switching method according to an embodiment of the present invention.
  • FIG. 8 is a basic flowchart of another program switching method according to an embodiment of the present invention.
  • FIG. 1 The basic process of program switching provided by the embodiment of the present invention can refer to FIG. 1, which mainly includes the following steps:
  • the terminal sends a program switching request to the media control module by using the PLAY command to carry the Require: 3gpp-switch-req-sdp identifier and the SDP-requested header field, where the program switching request includes the switching program identifier, such as the program that the user is watching is "Sky".
  • the user initiates a program switching request, and wants to receive the program "vanilla", and the program switching request includes the program identifier of "vanilla”.
  • the program switching request needs to pass through a gateway, an IMS (IP Multimedia Subsystem) core network, a service control module, and finally to the media control module.
  • IMS IP Multimedia Subsystem
  • A2 Determine, according to the program identifier, that the program to be switched is not in a media server that currently plays a program for the terminal.
  • the media control module After receiving the program switching request, the media control module determines, according to the program identifier, that the program to be switched is not in the media server currently playing the program for the user, for example, the current media server A plays the program “Sky” for the user, and the switched program “ Vanilla on Media Server B.
  • the media control module disconnects from the media server A.
  • the media control module A determines, according to the program identifier, that the program to be switched is not on the media server A currently playing the program for the user, for example, the current media server A plays the program “Sky” for the user.
  • the switched program "Vanilla" is not on the media server A, but on the media server B, the media server B belongs to the media control module B at the same time.
  • A3 Establish an RTSP (Real Time Streaming Protocol) link between the media server and the media server where the program to be switched is located, according to the program identifier, so that the media server where the program to be switched is located
  • the program identifier plays the switched circle to the terminal.
  • the media control module After determining that the switched program is on the media server B, the media control module initiates a real-time streaming protocol RTSP link establishment request to the media server B. After the RTSP link is established, the media control module sends a program play request to the media server B. Next, the media server B plays the switched program for the user.
  • the media server B belongs to the media control module, that is, the table The media server B is managed by the media control module.
  • the media control module obtains SDP (Session Description Protocol) information of the program to be switched before initiating a real-time streaming protocol RTSP link establishment request to the media server where the program to be switched is located, where the SDP information includes The description information of the audio stream, the video stream, and the like of the program, and the SDP information may be stored in the media control module in advance, or the media control module may obtain the information on the media server B through the RSTP descbibe message.
  • SDP Session Description Protocol
  • the media control module binds the session between the terminal and the media control module to the session established by the media control module and the media server B, that is, the session identification code session ID and the media control module between the terminal and the media control module.
  • the session ID of the media server B is set to be the same, and the mapping relationship between the RTSP server port number of the media server B and the RTSP server port number of the media control module is recorded, and the session identification code and media control are returned through the OK response.
  • the module's RTSP server port number and other information is sent to the terminal.
  • the media control module initiates a program play request to the media server B of the program to be switched, and the media server B receives the program. After the request is played, the media stream is sent to the terminal, that is, the terminal plays the switched program.
  • the media control module is configured to send the program switching request to the media control module of the media server where the program to be switched is located according to the program identifier, so as to facilitate the media where the program to be switched is located.
  • the media control module to which the server belongs establishes a real-time streaming protocol RTSP link with the media server where the program to be switched is located, so that the media server plays the switched program to the terminal according to the program identifier.
  • the terminal sends a program switching request to the media control module A, requesting to play "vanilla", and the media control module A sends a program switching request to the service control module, and after receiving the program switching request, the service control module sends the program switching request to the station.
  • the media control module B to which the media server B where the program to be switched is located belongs; 2.
  • the media control module A is preset according to a preset, where the media control module can save the programs that can be played by each media server. For example, if the vanilla is determined to be on the media server B, and the media server B is not attributed to the media control module A,
  • the program switching request is directly sent to the media control module B to which the media server B where the program to be switched is located belongs.
  • the media control module B obtains the SDP information of the program before initiating the real-time streaming protocol RTSP link establishment request to the media server B where the program to be switched is located, where the SDP information includes the audio stream, the video stream, and the like of the program.
  • the SDP information can be stored in the media control module in advance, or the media control module can obtain the information in the media server through the RSTP descbibe message.
  • the media control module B binds the session between the terminal and the media control module B to the session established by the media control module B and the media server, that is, the session identification code session ID and the control module between the terminal and the control module.
  • the session ID session ID between the media servers is set to the same, here are two cases:
  • the media control module B sends a real-time streaming protocol to the media server B.
  • the session ID of the connection between the mobile terminal and the media control module B is, for example,
  • XYZ requires the media server B to assign the same session ID to the link that is requested to be established. After receiving the RTSP link establishment request, the media server B returns the session ID to the terminal through the response message.
  • the media control module B sends a real-time streaming protocol to the media server B.
  • the RTSP link establishment request is made, the session ID of the connection between the terminal and the media control module B is not carried, and the media server
  • B After receiving the RTSP link setup request, B will assign a new session ID to the RTSP link, such as "XYZ", and return the session ID to the terminal through a response message.
  • the media control module B initiates a program play request to the media server B where the program to be switched is located, and after receiving the request, the media server B receives the request.
  • the media stream is sent to the terminal, that is, the terminal plays the switched program.
  • the program switching request it is determined that the program to be switched is not in the media server currently playing the program for the user, and the RTSP link is established with the media server where the program to be switched is located, so as to implement fast switching of programs between different media servers.
  • the basic procedure of the program switching may refer to FIG. 2, which mainly includes the following steps: Bl. receiving a program switching request sent by the user, determining that the program to be switched is not in the program list returned by the media server, and switching to the program to be switched.
  • the media control module to which the media server of the program is located sends a program switching request, so that the media control module to which the media server to which the program to be switched is located establishes a real-time streaming protocol RTSP link with the media server where the program to be switched is located.
  • the user sends an on-demand request to the service control module to request to watch the program “Sky”.
  • the service control module obtains the program list purchased by the user from the user database, for example, the user purchases the program. "Sky”, “Vanilla”, “Nothing", "Home”.
  • the service control module sends an on-demand request including the program list to the media control module, and the media control module determines that "Sky” sends an RTSP link establishment request to the media server A on the media server A, the request including the program list purchased by the user.
  • the media server A After receiving the RTSP link establishment request, the media server A returns a program list corresponding to the program list purchased by the user according to the program list purchased by the user, for example, the program stored in the media server A is "Sky” and “Vanilla”. , "Roof”, the program list returned to the terminal is “Sky”, “Vanilla”, and the program "Sky” is broadcast for users.
  • the program to be switched by the user is "home", and the terminal judges that the switched program is not in the program list, and the terminal sends a program switching request to the media control module, where the media server A and the media server B belong to the same media control module, and the media control module Judging that the program "Home” is on the media server B, the media control module disconnects from the media server A, and simultaneously sends a real-time streaming protocol RTSP link establishment request to the media server B. After the link is established, the media control module sends the media control module to the media server B. Sending a play request, the media server B plays the program "Home" for the terminal.
  • the terminal determines, according to the program list returned by the media server, that the program to be switched is not In the program list returned by the media server, the program switching request is sent to the media control module, which avoids the program switching failure when the switched program is on different servers.
  • the embodiment of the present invention provides a system for program switching.
  • the method mainly includes: a media control module 301, configured to receive a program switching request sent by a terminal, where the program switching request includes a program identifier to be switched by the terminal; Determining the program identifier, determining that the program to be switched is not in the media server currently playing the program for the terminal, and establishing a real-time streaming protocol RTSP link with the media server where the program to be switched is located according to the program identifier.
  • the media server 302 is configured to play the switched program to the terminal according to the program identifier.
  • the media control module 301 is further configured to: according to the program identifier, determine that the program to be switched is not in a media server currently playing a program for the terminal, and other media servers belonging to the media control module; And sending the program switching request to the media control module of the media server where the program to be switched is located, so that the media control module to which the media server where the program to be switched is located is established with the program to be switched.
  • the real-time streaming protocol RTSP link between the media servers in which the media servers are located, and the media server where the program to be switched is played to play the switched program to the terminal according to the program identifier.
  • the media control module 301 is further configured to set the same session identification for the link between the media control module and the terminal, and the link between the media control module and the media server where the program to be switched is located number.
  • the media control module 301 is further used to disconnect the link between the media server currently playing the program for the terminal.
  • the embodiment of the invention provides a media control module.
  • the method mainly includes:
  • the receiving module 401 is configured to receive a program switching request sent by the terminal, where the program switching request includes a program identifier to be switched by the terminal;
  • the determining module 402 is configured to determine, according to the program identifier, that the program to be switched is not in a media server that currently plays a program for the terminal;
  • the establishing module 403 is configured to establish, according to the program identifier, a medium where the program to be switched is located A real-time streaming protocol RTSP link between the body servers, so that the media server plays the switched program to the terminal according to the program identifier.
  • the media control module includes:
  • the determining module 402 is further configured to determine, according to the program identifier, that the program to be switched is not in a media server currently playing a program for the terminal and other media servers belonging to the media control module;
  • the establishing module 403 is further configured to send, according to the program identifier, the program switching request to the media control module of the media server where the program to be switched is located, so as to facilitate the belonging of the media server where the program to be switched is located.
  • the media control module establishes a real-time streaming protocol RTSP link with the media server where the program to be switched is located, so that the media server plays the switched program to the terminal according to the program identifier.
  • the media control module further includes a setting module 404, configured to set a same session for a link between the media control module and the terminal, and a link between the media control module and the media server where the program to be switched is located identifier.
  • a setting module 404 configured to set a same session for a link between the media control module and the terminal, and a link between the media control module and the media server where the program to be switched is located identifier.
  • the media control module further includes a cutoff module 405 for disconnecting the link with the media server currently playing the program for the terminal.
  • FIG. 5 a schematic flowchart is shown in FIG. 5 , and the entities involved include terminal A, gateway, and service.
  • the control module, the media control module, the media server 1 and the media server 2 are as follows:
  • Terminal A sends an on-demand link establishment request to the service control module through the gateway and the IMS core network.
  • the service control module receives the above-mentioned on-demand link setup request, and forwards the request to the media control module.
  • the media control module receives the above-mentioned on-demand link establishment request, and obtains SDP information of the program.
  • the SDP information includes information such as an audio stream and a video stream of the program, and the SDP information may be stored in the media control module in advance, or the media control module obtains the RSP descbibe message in the media server where the program requested by the user is located.
  • the media control module sends a real-time streaming protocol link RTSP setup request to the media server 1.
  • the media control module determines that the program on-demand by the terminal A is on the media server 1, and sends an RTSP setu request to the media server 1.
  • the media server 1 sends an OK response to the media control module to indicate that the link has been established.
  • the media control module sends an ⁇ response to the terminal by using a service control module, an IMS core network, or a gateway.
  • the above steps indicate that the RSTP/RTP link between Terminal A and Media Server 1 has been established.
  • Terminal A sends a real-time protocol stream play request RTSP pky to the media control module.
  • the request contains the program broadcasted by the terminal A, such as the terminal A on-demand movie "Beautiful Mind".
  • the media control module sends the foregoing real-time protocol stream play request to the media server 1.
  • the media server 1 returns an OK response to the media control module.
  • the media control module sends the OK response to the terminal A.
  • the media server 1 plays the program of the terminal A on-demand for the terminal A.
  • the terminal A broadcasts "Beautiful Mind”.
  • Terminal A sends a fast handover request to the media control module.
  • the fast handover request is sent to the media control module by the real-time protocol stream play request RTSP play carrying the Require: 3gpp-switch-req-sdp identifier and the SDP-requested header field, where the fast handover request includes the program to be switched by the terminal A, such as the terminal.
  • the media control module sends a real-time streaming protocol link disconnect request to the media server 1; 514.
  • the media server 1 returns an OK response to the media control module, to indicate that the link is disconnected. 515.
  • the media control module obtains the SDP information of the program "Mei Ltearing";
  • the SDP information includes information such as an audio stream and a video stream of the program, and the SDP information may be stored in the media control module in advance, or the media control module may obtain the content in the media server where the program "Mei Lagging" is located through the RSTP descbibe message.
  • the media control module sends a real-time streaming protocol link establishment request to the media server 2.
  • the media control module determines that the program on the terminal A is on the media server 2, and sends an RTSP setup request to the media server 2.
  • the media server 2 returns an OK response to the media control module to indicate that the link has been established.
  • the media control module binds the session between the terminal and the control module to the session established by the control module and the media server; and identifies the session identification code session ID between the terminal and the control module and the session between the control module and the media server.
  • the code session ID is set to the same, which means that the RSTP/RTP link between the terminal A and the media server 2 has been established.
  • the media control module sends a real-time protocol stream play request to the media server 2, and the request includes a session ID and the like.
  • the media server 2 returns an OK response to the media control module.
  • the media control module sends the OK response to the terminal A.
  • the media server 2 is the terminal A.
  • the terminal A plays the program to be switched. Here is the terminal A to play "Mei Ltearing".
  • the media control module sends a SIP (Session Initiation) to the service control module.
  • SIP Session Initiation
  • the media control module informs the service control module to switch event information through SIP info.
  • the message contains Uniform Resource Location (URL) for media control before and after switching.
  • the module performs statistics and other operations on the switching event information.
  • the service control module returns an OK response to the media control module.
  • the media control module sends a SIP re-invitation message to the service control module (SIP RE- INVITE).
  • the service control module returns an OK response to the media control module.
  • the media control module selects the media server to provide the on-demand program for the terminal according to the handover request, thereby implementing fast switching between different media servers.
  • the terminal A sends an on-demand link establishment request to the service control module by using the gateway and the IMS core network.
  • the service control module receives the above-mentioned on-demand link establishment request, and obtains a program list purchased by the user from the user database, where the program list includes all programs that the terminal can order.
  • the service control module sends an on-demand link setup request including a list of programs purchased by the user to the media control module.
  • the media control module sends a real-time streaming protocol link establishment request RTSP setup to the media server 1.
  • the media control module includes, according to the program information saved by the media control module, the program information includes each media server managed by the media control module.
  • the media server 1 determines a program list that matches the existing program list according to the program list purchased by the user.
  • the media server 1 sends an OK response to the media control module to carry the program list.
  • the media control module After receiving the OK response, the media control module sends an OK response to the service control module. After receiving the OK response, the service control module sends an OK response to the terminal A through the IMS core network gateway.
  • the above steps indicate that the RSTP/RTP link between the terminal A and the media server 1 has been established.
  • Terminal A sends a real-time protocol stream play request RTSP play to the media control module.
  • the request contains the program broadcasted by the terminal A, such as the terminal A on-demand movie "Beautiful Heart".
  • the media control module sends the foregoing real-time protocol stream play request to the media server 1.
  • the media server 1 returns an OK response to the media control module.
  • the media control module sends the OK response to the terminal A, and carries the program list.
  • the media server 1 plays the program of the terminal A on-demand for the terminal A. That is, the terminal A plays "Beautiful Mind".
  • Terminal A determines that the switched program is in the program list.
  • terminal A will switch the movie to "Mei Ltearing" and it is in the program list.
  • Terminal A sends a fast handover request to the media control module.
  • the switching request is sent to the media control module by the real-time protocol stream play request RTSP play carrying the stream switch header field, and the request includes the program to be switched by the terminal A, here is "Mei Lan Fang".
  • the media control module sends a real-time streaming protocol link establishment request to the media server 1.
  • the media server 1 returns an OK response to the media control module to indicate that the link has been established.
  • the media control module returns an OK response to terminal A.
  • the media server 1 is a program that the terminal A plays the terminal A to switch. That is, the terminal A plays "Mei Ltearing".
  • Terminal A determines that the switched program is not in the program list.
  • terminal A will switch the movie to "Mei Lagging" and it is not in the program list. 620.
  • the terminal A disconnects the RTSP/RTP session with the media server 1.
  • Terminal A establishes an RTSP/RTP session with the media server 2.
  • the media server 2 plays the program of the terminal A on-demand for the terminal A. That is, the terminal A plays "Mei Ltearing".
  • the program returned by the media server determines whether the end of the handover is in the media server. If yes, the playback request is directly sent to the media control control module to implement fast handover. If not, the connection is established with the new media server. , to achieve program switching, making program switching between different media servers fast.
  • Terminal A establishes an RTSP/RTP session with the media server 1.
  • the media server 1 is a program that the terminal plays the terminal A on demand, and the program is, for example, “Beautiful Heart”.
  • Terminal A sends a program switching request to the media control module 1 to request to play Mei Lsweeping.
  • the media control module 1 sends a real-time streaming protocol link disconnect request to the media server 1. Specifically, after the media control module 1 receives the program switching request, the media control module 1 finds that the program "Mei Lagging" on the terminal A is not on the media server 1, and the program "Mei Lagging" broadcasted by the terminal A is not in the media. Within the media server controlled by the control module 1, a real-time streaming protocol link disconnect request is therefore sent to the media server 1.
  • the media server 1 sends an OK response to the media control module 1 to indicate that the link is disconnected. 706.
  • the media control module 1 sends a SIP message to the service control module; the message carries the terminal information.
  • the service control module sends an OK response to the media control module 1.
  • the service control module sends an invite message (SIP INVITE) to the media control module 2; the invite message includes terminal information. Specifically, the service control module finds that the program on the terminal A is on the media server 2 according to the terminal information, and the media server 2 belongs to the media control module 2, and therefore sends an invitation message (SIP INVITE) to the media control module 2.
  • SIP INVITE invite message
  • the media control module 2 After receiving the invitation message, the media control module 2 sends a real-time streaming protocol link establishment request (RTSP setup) to the media server 2.
  • RTSP setup real-time streaming protocol link establishment request
  • the media server 2 sends an OK response to the media control module 2.
  • the media control module 2 sends an OK response to the service control module, where the response carries media source information, including a media source sending address, media stream information, and the like.
  • the service control module After receiving the OK response, the service control module sends a SIP message to the media control module 1, where the SIP message includes media source information.
  • the media control module 1 sends an OK response to the service control module.
  • the media control module 1 sends an OK response to the terminal A to indicate that the processes of the media server 1 and the media control module 1 are ended.
  • the media control module 2 sends a program play request to the media server 2.
  • the media server 2 sends an OK response to the media control module 2.
  • the media server 2 is the terminal A playback terminal A switching program; here the media server
  • program switching between different media servers is implemented by changing different media control modules, and fast switching of programs is realized.
  • Terminal A establishes an RTSP/RTP session with the media server 1.
  • the media server is the terminal playing terminal A on-demand program "beautiful mind".
  • Terminal A sends a program play request to the media control module 1 to request to play Mei Lagging.
  • the media control module 1 sends a real-time streaming protocol link disconnection request to the media server 1. Specifically, after receiving the program switching request, the media control module 1 finds that the program “Mei Lagging” on the terminal A is not on the media server 1. And the program broadcasted by the terminal A is not in the media server controlled by the media control module 1.
  • the media server 1 sends an OK response to the media control module 1 to indicate that the link is disconnected.
  • the media control module sends an invitation message (SIP INVITE) to the media control module 2, where the invitation message includes terminal information.
  • the media control module 2 finds that the program on the terminal A is on the media server 2 according to the program play request, and the media server 2 belongs to the media control module 2.
  • the media control module 2 After receiving the invitation message, the media control module 2 sends a real-time streaming protocol link establishment request (RTSP setup) to the media server 2;
  • RTSP setup real-time streaming protocol link establishment request
  • the media server 2 sends an OK response to the media control module 2,
  • the media control module 2 sends an OK response to the media control module 1;
  • the media control module 1 sends an OK response to the terminal A.
  • the media control module 2 sends a program play request to the media server 2, and requests to play "Mei Lagging";
  • the media server 2 sends an OK response to the media control module 2;
  • the media server 2 plays the program “Mei Ltearing” that is switched by the terminal A for the terminal A.
  • program switching between different media servers is implemented by changing different media control modules, and fast switching of programs is realized.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Description

一种节目切换的方法, 系统和装置
本申请要求于 2008 年 12 月 31 日提交中国专利局、 申请号为 200810242231.8、 发明名称为 "一种节目切换的方法, 系统和装置" 的中国 专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域, 具体涉及一种节目切换的方法, 系统和装置。 背景技术
随着电视信号的数字化, 在带来清晰的电视节目的同时, 也需要实现频 道 /节目的快速切换。 现有技术中, 节目的快速切换基于切换前、 后内容都 在同一个媒体服务器内的情况; 当切换前后的节目不在同一个媒体服务器内 时, 切换速度慢, 用户体验差。
发明内容
有鉴于此, 本发明提供一种节目切换的方法, 系统和装置, 解决节目切 换速度慢, 用户体验差的问题。
一种节目切换的方法, 包括, 接收终端发送的节目切换请求, 节目切换 请求中包含终端要切换的节目标识; 根据节目标识, 判断要切换的节目不在 当前为终端播放节目的媒体服务器内; 根据节目标识, 建立与要切换的节目 所在的媒体服务器之间的实时流协议链路, 以便于要切换的节目所在的媒体 服务器根据节目标识向所述终端播放切换后的节目。
一种节目切换的方法, 包括, 接收用户发送的节目切换请求, 确定要切 换的节目不在媒体服务器返回的节目单内, 向要切换的节目所在的媒体服务 器归属的媒体控制模块发送节目切换请求, 以便要切换的节目所在的媒体服 务器归属的媒体控制模块与要切换的节目所在的媒体服务器建立实时流协议 RTSP链路。
一种节目切换的系统, 包括, 媒体控制模块, 用于接收终端发送的节目 切换请求, 节目切换请求中包含要切换的节目标识; 根据节目标识, 判断要 切换的节目不在当前为终端播放节目的媒体服务器内;并根据节目标识, 建 立与要切换的节目所在的媒体服务器之间的实时流协议 RTSP链路; 媒体服 务器, 用于根据节目标识向终端播放切换后的节目。
一种媒体控制模块, 包括, 接收模块, 用于接收终端发送的节目切换请 求, 节目切换请求中包含终端要切换的节目标识; 判断模块, 用于根据节目 标识, 判断要切换的节目不在当前为终端播放节目的媒体服务器内; 建立模 块, 根据节目标识, 建立与要切换的节目所在的媒体服务器之间的实时流协 议 RTSP链路, 以便于所述要切换的节目所在的媒体服务器根据节目标识向 终端播放切换后的节目。
本发明实施例采用判断要切换的节目不在当前为终端播放节目的媒体服 务器后, 根据节目标识, 向要切换的节目所在的媒体服务器发起实时流协议
RTSP链路建立请求, 实现了不同媒体服务器之间的快速切换。
附图说明
图 1是本发明实施例提供的节目切换方法的基本流程示意图;
图 2是本发明实施例提供的另一节目切换方法的基本流程示意图; 图 3是本发明实施例提供的节目切换系统的基本框图;
图 4是本发明实施例提供的媒体控制模块的基本框图;
图 5是本发明实施例提供的节目切换方法的基本流程图;
图 6是本发明实施例提供的另一节目切换方法的基本流程图;
图 7是本发明实施例提供的另一节目切换方法的基本流程图;
图 8是本发明实施例提供的另一节目切换方法的基本流程图。
具体实施方式
为了使本领域的技术人员更好的理解本发明内容, 以下结合附图以及具 体实施例对本发明内容作具体说明。
本发明实施例提供的节目切换的基本流程可参考图 1, 主要包括歩骤:
Al、 接收终端发送的节目切换请求, 所述节目切换请求中包含终端要 切换的节目标识。
终端向媒体控制模块通过 PLAY指令携带 Require: 3gpp-switch-req-sdp标 识以及 SDP-requested头域发送节目切换请求, 该节目切换请求中包含切换节 目标识, 如用户正在收看的节目为 《天空》 , 此时, 用户发起节目切换请 求, 想收到节目 《香草》 , 则节目切换请求中, 包含 《香草》 的节目标识。 当然, 所述节目切换请求需通过网关, IMS(IP Multimedia Subsystem, IP多 媒体子系统)核心网, 业务控制模块, 最后到达媒体控制模块。
A2、 根据所述节目标识, 判断所述要切换的节目不在当前为终端播放 节目的媒体服务器内。
媒体控制模块接收到节目切换请求后, 根据节目标识, 判断要切换的节 目不在当前为用户播放节目的媒体服务器内, 如, 当前媒体服务器 A为用 户播放节目 《天空》 , 而切换后的节目 《香草》在媒体服务器 B上。
进一歩地, 媒体控制模块断开与媒体服务器 A的连接。
进一歩地, 媒体控制模块 A接收到节目切换请求后, 根据节目标识, 判断要切换的节目不在当前为用户播放节目的媒体服务器 A上, 如, 当前 媒体服务器 A为用户播放节目 《天空》 , 而切换后的节目 《香草》 不在媒 体服务器 A上, 而在媒体服务器 B上, 同时媒体服务器 B归属于媒体控制 模块 B。
A3、 根据所述节目标识, 建立与所述要切换的节目所在的媒体服务器 之间的 RTSP ( Real Time Streaming Protocol , 实时流传输协议) 链路, 以便 于要切换的节目所在的媒体服务器根据所述节目标识向终端播放切换后的节 圈。
具体的, 媒体控制模块确定切换后的节目在媒体服务器 B上后, 向媒 体服务器 B发起实时流协议 RTSP链路建立请求, RTSP链路建立后, 媒体 控制模块向媒体服务器 B发送节目播放请求, 接下来, 媒体服务器 B为用 户播放切换后的节目。 这里, 媒体服务器 B归属于该媒体控制模块, 即表 示媒体服务器 B归该媒体控制模块管理。
可选的, 媒体控制模块在向要切换的节目所在的媒体服务器发起实时流 协议 RTSP 链路建立请求之前, 获得要切换的节目的 SDP ( Session Description Protocol, 会话描述协议) 信息, 这里 SDP信息包含节目的音频 流, 视频流等的描述信息, 同时 SDP信息可以事先存放在媒体控制模块 上, 或媒体控制模块通过 RSTP descbibe消息去媒体服务器 B上获取。
进一歩的, 媒体控制模块将终端和媒体控制模块之间的会话与媒体控制 模块与媒体服务器 B建立的会话绑定, 即将终端和媒体控制模块之间的会 话识别码 session ID与媒体控制模块与媒体服务器 B之间的会话识别码 session ID设为一样, 记录媒体服务器 B的 RTSP服务器端口号与媒体控制 模块的 RTSP服务器端口号之间的映射关系, 同时通过 OK响应返回会话识 别码和媒体控制模块的 RTSP服务器端口号等信息给终端。
进一歩的, 媒体控制模块在确定其与媒体服务器 B之间的 RTSP链路已 建立后, 向所述要切换的节目的媒体服务器即媒体服务器 B发起节目播放 请求, 媒体服务器 B收到上述节目播放请求后, 向终端下发媒体流, 即为 终端播放切换后的节目。
进一歩的, 媒体控制模块用于根据所述节目标识, 将所述节目切换请求 发送给所述要切换的节目所在的媒体服务器归属的媒体控制模块, 以便于所 述要切换的节目所在的媒体服务器归属的媒体控制模块建立与所述要切换的 节目所在的媒体服务器之间的实时流协议 RTSP链路, 以便于媒体服务器根 据所述节目标识向终端播放切换后的节目。
这里包含两种情况:
1、 终端向媒体控制模块 A发送节目切换请求, 要求播放 《香草》 , 媒 体控制模块 A将节目切换请求发送给业务控制模块, 业务控制模块收到节 目切换请求后, 将节目切换请求发送给所述要切换的节目所在的媒体服务器 B归属的媒体控制模块 B; 2、 媒体控制模块 A根据预先设置, 这里可以在媒体控制模块中保存各 个媒体服务器可以播放的节目, 如判断 《香草》 在媒体服务器 B上, 同时 媒体服务器 B不归属于媒体控制模块 A, 则将节目切换请求直接发送给所 述要切换的节目所在的媒体服务器 B归属的媒体控制模块 B。
可选的, 媒体控制模块 B在向要切换的节目所在的媒体服务器 B发起 实时流协议 RTSP链路建立请求之前, 获得节目的 SDP信息, 这里 SDP信 息包含节目的音频流, 视频流等信息, 同时 SDP信息可以事先存放在媒体 控制模块上, 或媒体控制模块通过 RSTP descbibe消息去媒体服务器内获 取。
进一歩的, 媒体控制模块 B将终端和媒体控制模块 B之间的会话与媒 体控制模块 B与媒体服务器建立的会话绑定, 即将终端和控制模块之间的 会话识别码 session ID与控制模块与媒体服务器之间的会话识别码 session ID设为一样, 这里分两种情况:
1、 媒体控制模块 B向媒体服务器 B发送实时流协议 RTSP链路建立请 求时, 携带终端与媒体控制模块 B 之间的连接的 session ID , 比如为
"XYZ " , 要求媒体服务器 B为请求建立的链路分配相同的 session ID, 媒 体服务器 B收到 RTSP链路建立请求后, 将该 session ID通过响应消息返回 给终端。
2、 媒体控制模块 B向媒体服务器 B发送实时流协议 RTSP链路建立请 求时, 不携带终端与媒体控制模块 B之间的连接的 session ID, 媒体服务器
B收到 RTSP链路建立请求后, 将为该 RTSP链路分配一个新的 session ID, 如 "XYZ" , 并将该 session ID通过响应消息返回给终端。
进一歩的, 媒体控制模块 B在确定其与媒体服务器之间的 RTSP链路已 建立后, 向所述要切换的节目所在的媒体服务器 B发起节目播放请求, 媒 体服务器 B收到上述请求后, 向终端下发媒体流, 即为终端播放切换后的 节目。 本实施例根据节目切换请求, 判断要切换的节目不在当前为用户播放节 目的媒体服务器内, 与要切换的节目所在的媒体服务器建立 RTSP链路, 实 现不同媒体服务器之间节目的快速切换。
本发明实施例提供的节目切换的基本流程可参考图 2, 主要包括歩骤: Bl、 接收用户发送的节目切换请求, 确定要切换的节目不在媒体服务 器返回的节目单内, 向所述要切换的节目所在的媒体服务器归属的媒体控制 模块发送节目切换请求, 以便所述要切换的节目所在的媒体服务器归属的媒 体控制模块与所述要切换的节目所在的媒体服务器建立实时流协议 RTSP链 路。
具体的, 用户在点播节目时, 向业务控制模块发送点播请求, 要求收看 节目 《天空》 , 业务控制模块在收到点播请求后, 到用户数据库获取用户购 买的节目列表, 如, 用户购买了节目 《天空》 、 《香草》 、 《无奇》 、 《家》 。 业务控制模块将包含节目列表的点播请求发送给媒体控制模块, 媒 体控制模块判断 《天空》在媒体服务器 A上, 向媒体服务器 A发送 RTSP 链路建立请求, 该请求中包含用户购买的节目列表。 媒体服务器 A在收到 RTSP链路建立请求后, 根据用户购买的节目列表, 向终端返回与用户购买 的节目列表对应的节目单, 如媒体服务器 A存有的节目为 《天空》 、 《香 草》 、 《屋脊》 , 则向终端返回的节目单为 《天空》 、 《香草》 , 并为用户 播放节目 《天空》 。
用户要切换的节目为 《家》 , 终端判断切换后的节目不在节目单内, 终 端向媒体控制模块发送节目切换请求, 这里媒体服务器 A和媒体服务器 B 归属于同一个媒体控制模块, 媒体控制模块判断节目 《家》在媒体服务器 B 上, 媒体控制模块断开与媒体服务器 A的连接, 同时向媒体服务器 B发送 实时流协议 RTSP链路建立请求, 链路建立后, 媒体控制模块向媒体服务器 B发送播放请求, 由媒体服务器 B为终端播放节目 《家》 。
本发明实施例终端根据媒体服务器返回的节目单, 确定要切换的节目不 在媒体服务器返回的节目单内, 则向媒体控制模块发送节目切换请求, 避免 了当切换后的节目在不同服务器时的节目切换失败。
本发明实施例提供一种节目切换的系统, 参考图 3, 主要包括: 媒体控制模块 301, 用于接收终端发送的节目切换请求, 所述节目切换 请求中包含终端要切换的节目标识; 根据所述节目标识, 判断所述要切换的 节目不在当前为终端播放节目的媒体服务器, 根据所述节目标识, 建立与所 述要切换的节目所在的媒体服务器之间的实时流协议 RTSP链路。
媒体服务器 302, 用于根据所述节目标识向终端播放切换后的节目。 媒体控制模块 301进一歩用于, 根据所述节目标识, 判断所述要切换的 节目不在当前为终端播放节目的媒体服务器以及归属于所述媒体控制模块的 其他媒体服务器内; 根据所述节目标识, 将所述节目切换请求发送给所述要 切换的节目所在的媒体服务器归属的媒体控制模块, 以便于所述要切换的节 目所在的媒体服务器归属的媒体控制模块建立与所述要切换的节目所在的媒 体服务器之间的实时流协议 RTSP链路, 以及要切换的节目所在的媒体服务 器根据所述节目标识向终端播放切换后的节目。
媒体控制模块 301 进一歩用于, 为所述媒体控制模块和终端之间的链 路, 及所述媒体控制模块与所述要切换的节目所在的媒体服务器之间的链路 设置相同的会话识别号。
媒体控制模块 301进一歩用于, 断开与当前为终端播放节目的媒体服务 器之间的链路。
本发明实施例提供一种媒体控制模块, 参考图 4, 主要包括:
接收模块 401, 用于接收终端发送的节目切换请求, 所述节目切换请求 中包含终端要切换的节目标识;
判断模块 402, 用于根据所述节目标识, 判断所述要切换的节目不在当 前为终端播放节目的媒体服务器内;
建立模块 403, 根据所述节目标识, 建立与所述要切换的节目所在的媒 体服务器之间的实时流协议 RTSP链路, 以便于媒体服务器根据所述节目标 识向终端播放切换后的节目。
媒体控制模块进一歩包括:
判断模块 402进一歩用于根据所述节目标识, 判断所述要切换的节目不 在当前为终端播放节目的媒体服务器以及归属于所述媒体控制模块的其他媒 体服务器内;
建立模块 403进一歩用于根据所述节目标识, 将所述节目切换请求发送 给所述要切换的节目所在的媒体服务器归属的媒体控制模块, 以便于所述要 切换的节目所在的媒体服务器归属的媒体控制模块建立与所述要切换的节目 所在的媒体服务器之间的实时流协议 RTSP链路, 以便于媒体服务器根据所 述节目标识向终端播放切换后的节目。
所述媒体控制模块进一歩包括设置模块 404, 用于为媒体控制模块和终 端之间的链路, 及媒体控制模块与所述要切换的节目所在的媒体服务器之间 的链路设置相同的会话识别号。
媒体控制模块进一歩包括切断模块 405, 用于断开与当前为终端播放节 目的媒体服务器之间的链路。
为更好的理解上述实施例, 下面结合节目切换的方法的一个具体执行过 程为例进行说明, 针对图 1的流程介绍, 流程示意图如图 5所示, 涉及的实 体包括终端 A、 网关、 业务控制模块、 媒体控制模块、 媒体服务器 1及媒体 服务器 2, 具体流程如下:
501、 终端 A通过网关、 IMS核网向业务控制模块发送点播链路建立请 求。
502、 业务控制模块收到上述点播链路建立请求, 将其转发给媒体控制 模块。
503、 媒体控制模块收到上述点播链路建立请求, 获得节目的 SDP信 息。 这里 SDP信息包含节目的音频流, 视频流等信息, 同时 SDP信息可以 事先存放在媒体控制模块上, 或媒体控制模块通过 RSTP descbibe消息去用 户点播的节目所在的媒体服务器内获取。
504、 媒体控制模块向媒体服务器 1发送实时流协议链路 RTSP建立请 求。 媒体控制模块判断终端 A点播的节目在媒体服务器 1 上, 则向媒体服 务器 1发送 RTSP setu 请求。
505、 媒体服务器 1 向媒体控制模块发送 OK响应, 以表示链路已建 立。
506、 媒体控制模块通过业务控制模块、 IMS核网、 网关向终端发送 οκ响应。
以上歩骤即表示终端 A和媒体服务器 1之间的 RSTP/RTP链路已经建 立。
507、 终端 A向媒体控制模块发送实时协议流播放请求 RTSP pky。 该 请求中包含终端 A要点播的节目, 如终端 A点播电影 《美丽心灵》 。
508、 媒体控制模块将上述实时协议流播放请求发送给媒体服务器 1。
509、 媒体服务器 1向媒体控制模块返回 OK响应。
510、 媒体控制模块将上述 OK响应发送给终端 A。
511、 媒体服务器 1为终端 A播放终端 A点播的节目。 这里为终端 A播 放 《美丽心灵》 。
512、 终端 A向媒体控制模块发送快速切换请求。
该快速切换请求通过实时协议流播放请求 RTSP play携带 Require: 3gpp-switch-req-sdp标识以及 SDP-requested头域发送给媒体控制模块, 该快 速切换请求中包含终端 A要切换的节目, 如终端 A切换电影 《梅兰芳》 。
513、 媒体控制模块向媒体服务器 1发送实时流协议链路断开请求; 514、 媒体服务器 1 向媒体控制模块返回 OK响应, 以表示链路已断 开; 515、 媒体控制模块获得节目 《梅兰芳》 的 SDP信息;
这里 SDP信息包含节目的音频流, 视频流等信息, 同时 SDP信息可以 事先存放在媒体控制模块上, 或媒体控制模块通过 RSTP descbibe消息去节 目 《梅兰芳》 所在的媒体服务器内获取。
516、 媒体控制模块向媒体服务器 2发送实时流协议链路建立请求
RTSP setup; 具体的, 媒体控制模块判断终端 A点播的节目在媒体服务器 2 上, 则向媒体服务器 2发送 RTSP setup请求。
517、 媒体服务器 2 向媒体控制模块返回 OK响应, 以表示链路已建 立。
518、 媒体控制模块将终端和控制模块之间的会话与控制模块与媒体服 务器建立的会话绑定; 将终端和控制模块之间的会话识别码 session ID与控 制模块与媒体服务器之间的会话识别码 session ID设为一样, 即表示终端 A 和媒体服务器 2之间的 RSTP/RTP链路已经建立。
519、 媒体控制模块向媒体服务器 2发送实时协议流播放请求 RTSP play; 该请求中包含 session ID等信息。
520、 媒体服务器 2向媒体控制模块返回 OK响应。
521、 媒体控制模块将上述 OK响应发送给终端 A。
522、 媒体服务器 2为终端 A播放终端 A要切换的节目。 这里为终端 A 播放 《梅兰芳》 。
523、 媒体控制模块向业务控制模块发送 SIP ( Session Initiation
Protocol, 会话初始化协议) 消息 (sip infomation) ·' 媒体控制模块通过 SIP info告知业务控制模块切换事件信息, 该消息中包含切换前后媒体的统一资 源定位 (URL, Uniform Resource Location) , 以便于业务控制模块对切换 事件信息进行统计等操作。
524、 业务控制模块向媒体控制模块返回 OK响应。
525、 媒体控制模块向业务控制模块发送 SIP重邀请消息 (SIP RE- INVITE) 。
526、 业务控制模块向媒体控制模块返回 OK响应。
本实施例通过在终端发起切换请求时, 由媒体控制模块根据切换请求选 择媒体服务器为终端提供点播节目, 从而实现不同媒体服务器之间的快速切 换。
为更好的理解上述实施例, 针对图 2的流程介绍, 下面结合节目切换的 方法的一个具体执行过程为例进行说明, 流程示意图如图 6所示, 涉及的实 体包括终端 A、 网关、 业务控制模块、 媒体控制模块、 媒体服务器 1及媒体 服务器 2, 用户数据库, 具体流程如下:
601、 终端 A通过网关、 IMS核网向业务控制模块发送点播链路建立请 求。
602、 业务控制模块收到上述点播链路建立请求, 去用户数据库获取用 户购买的节目列表, 该节目列表中, 包含终端可以点播的所有节目。
603、 业务控制模块将包含用户购买的节目列表的点播链路建立请求发 给媒体控制模块。
604、 媒体控制模块向媒体服务器 1 发送实时流协议链路建立请求 RTSP setup , 具体的, 媒体控制模块根据所述媒体控制模块保存的节目信 息, 该节目信息包含媒体控制模块所管辖的各个媒体服务器所能播放的节目 列表, 判断终端 A点播的节目在媒体服务器 1上, 则向媒体服务器 1发送 RTSP setup请求, 该请求中携带用户购买的节目列表。
605、 媒体服务器 1 根据用户购买的节目列表, 确定自身现有的符合节 目列表的节目单。
606、 媒体服务器 1向媒体控制模块发送 OK响应, 携带节目单。
607、 媒体控制模块收到上述 OK响应后, 将 OK响应发送给业务控制 模块, 业务控制模块收到上述 OK响应后, 通过 IMS核心网网关将 OK响 应发送给终端 A。 以上歩骤即表示终端 A和媒体服务器 1之间的 RSTP/RTP链路已经建 立。
608、 终端 A向媒体控制模块发送实时协议流播放请求 RTSP play。 该请求中包含终端 A要点播的节目, 如终端 A点播电影 《美丽心 灵》 。
609、 媒体控制模块将上述实时协议流播放请求发送给媒体服务器 1。
610、 媒体服务器 1向媒体控制模块返回 OK响应。
611、 媒体控制模块将上述 OK响应发送给终端 A, 携带节目单。
612、 媒体服务器 1为终端 A播放终端 A点播的节目。 即为终端 A播放 《美丽心灵》 。
情况 1:
613、 终端 A判断切换后的节目在节目单中。
如终端 A将要切换电影为 《梅兰芳》 , 并且其在节目单中。
614、 终端 A向媒体控制模块发送快速切换请求。
该切换请求通过实时协议流播放请求 RTSP play携带 stream switch头域 发送给媒体控制模块, 该请求中包含终端 A要切换的节目, 这里为 《梅兰 芳》 。
615、 媒体控制模块向媒体服务器 1发送实时流协议链路建立请求。
616、 媒体服务器 1 向媒体控制模块返回 OK响应, 以表示链路已建 立。
617、 媒体控制模块向终端 A返回 OK响应。
618、 媒体服务器 1为终端 A播放终端 A切换的节目。 即为终端 A播放 《梅兰芳》 。
情况 2:
619、 终端 A判断切换后的节目不在节目单中。
如终端 A将要切换电影为 《梅兰芳》 , 并且其不在节目单中。 620、 终端 A断开与媒体服务器 1之间的 RTSP/RTP会话。
621、 终端 A与媒体服务器 2建立 RTSP/RTP会话。
具体建立过程可见歩骤 601— 607所示, 在此不再详述。
622、 媒体服务器 2为终端 A播放终端 A点播的节目。 即为终端 A播放 《梅兰芳》 。
本实施例通过媒体服务器返回的节目单, 判断切换后的结束是否在媒体 服务器中, 如果在则直接向媒体控制控制模块发送播放请求, 实现快速切 换, 如果不在, 则与新的媒体服务器建立连接, 实现节目切换, 使得不同媒 体服务器之间的节目切换快速。
为更好的理解上述实施例, 下面结合节目切换的方法的一个具体执行过 程为例进行说明, 涉及的实体包括终端 A、 业务控制模块、 媒体控制模块 1、 媒体控制模块 2、 媒体服务器 1及媒体服务器 2, 如图 7所示具体流程如 下:
701、 终端 A与媒体服务器 1建立 RTSP/RTP会话。
具体过程如图 6歩骤 601— 607所示。
702、 媒体服务器 1为终端播放终端 A点播的节目, 该节目例如为 《美 丽心灵》 。
703、 终端 A 向媒体控制模块 1 发送节目切换请求, 要求播放 《梅兰 芳》 。
704、 媒体控制模块 1向媒体服务器 1发送实时流协议链路断开请求。 具体的, 媒体控制模块 1收到节目切换请求后, 媒体控制模块 1发现终 端 A点播的节目 《梅兰芳》 不在媒体服务器 1上, 且终端 A要点播的节目 《梅兰芳》 也不在媒体控制模块 1所控制的媒体服务器内, 因此向媒体服务 器 1发送实时流协议链路断开请求。
705、 媒体服务器 1 向媒体控制模块 1发送 OK响应, 以表示链路已断 开; 706、 媒体控制模块 1 向业务控制模块发送 SIP 消息 ( SIP information) ; 该消息中携带终端信息。
707、 业务控制模块向媒体控制模块 1发送 OK响应。
708、 业务控制模向媒体控制模块 2发送邀请消息 (SIP INVITE) ;该邀 请消息中包含终端信息。 具体的, 业务控制模块根据终端信息, 发现终端 A 点播的节目在媒体服务器 2上, 且媒体服务器 2归属于媒体控制模块 2, 因 此向媒体控制模块 2发送邀请消息 (SIP INVITE) 。
709、 媒体控制模块 2收到邀请消息后, 向媒体服务器 2发送实时流协 议链路建立请求 (RTSP setup) 。
710、 媒体服务器 2向媒体控制模块 2发送 OK响应。
711、 媒体控制模块 2向业务控制模块发送 OK响应, 该响应中携带媒 体源信息, 包括媒体源发送地址, 媒体流信息等。
712、 业务控制模块收到上述 OK响应后, 向媒体控制模块 1发送 SIP 消息 (SIP information) , 该 SIP消息中包含媒体源信息。
713、 媒体控制模块 1向业务控制模块发送 OK响应。
714、 媒体控制模块 1向终端 A发送 OK响应, 以表示对媒体服务器 1 和媒体控制模块 1的流程结束。
715、 媒体控制模块 2向媒体服务器 2发送节目播放请求。
716、 媒体服务器 2向媒体控制模块 2发送 OK响应。
717、 媒体服务器 2为终端 A播放终端 A切换的节目; 这里媒体服务器
2为终端 A播放 《梅兰芳》 。
本实施例通过改变不同媒体控制模块来实现不同媒体服务器之间的节目 切换, 实现了节目的快速切换。
为更好的理解上述实施例, 下面结合节目切换的方法的一个具体执行过 程为例进行说明, 涉及的实体包括终端 A、 网关、 业务控制模块、 媒体控制 模块 1、 媒体控制模块 2、 媒体服务器 1及媒体服务器 2, 为简单起见, 如 图 8所示, 只画出终端 A、 业务控制模块、 媒体控制模块 1、 媒体控制模块 2、 媒体服务器 1及媒体服务器 2, 并不影响说明效果, 具体流程如下:
801、 终端 A与媒体服务器 1建立 RTSP/RTP会话。
具体过程如图 6歩骤 601— 611所示;
802、 媒体服务器为终端播放终端 A点播的节目 《美丽心灵》 。
803、 终端 A 向媒体控制模块 1 发送节目播放请求, 要求播放 《梅兰 芳》 。
804、 媒体控制模块 1 向媒体服务器 1发送实时流协议链路断开请求; 具体的, 媒体控制模块 1 收到节目切换请求后, 发现终端 A点播的节目 《梅兰芳》 不在媒体服务器 1上, 且终端 A要点播的节目也不在媒体控制 模块 1所控制的媒体服务器内。
805、 媒体服务器 1 向媒体控制模块 1发送 OK响应, 以表示链路已断 开;
806、 媒体控制模块 1 向媒体控制模块 2 发送邀请消息 (SIP INVITE) , 该邀请消息中包含终端信息。 具体的, 媒体控制模块 2根据节 目播放请求, 发现终端 A点播的节目在媒体服务器 2上, 且媒体服务器 2 归属于媒体控制模块 2。
807、 媒体控制模块 2收到邀请消息后, 向媒体服务器 2发送实时流协 议链路建立请求 (RTSP setup) ;
808、 媒体服务器 2向媒体控制模块 2发送 OK响应,
809、 媒体控制模块 2向媒体控制模块 1发送 OK响应;
810、 媒体控制模块 1向终端 A发送 OK响应;
811、 媒体控制模块 2向媒体服务器 2发送节目播放请求,要求播放 《梅 兰芳》 ;
812、 媒体服务器 2向媒体控制模块 2发送 OK响应;
813、 媒体服务器 2为终端 A播放终端 A切换的节目 《梅兰芳》 。 本实施例通过改变不同媒体控制模块来实现不同媒体服务器之间的节目 切换, 实现了节目的快速切换。
需要说明的是, 通过以上的实施方式的描述, 本领域的技术人员可以清 楚地了解到本发明可借助软件加必需的硬件平台的方式来实现, 当然也可以 全部通过硬件来实施。 基于这样的理解, 本发明的技术方案对背景技术做出 贡献的全部或者部分可以以软件产品的形式体现出来, 该计算机软件产品可 以存储在存储介质中, 如 ROM/RAM、 磁碟、 光盘等, 包括若干指令用以 使得一台计算机设备 (可以是个人计算机, 服务器, 或者网络设备等) 执行 本发明各个实施例或者实施例的某些部分所述的方法。
以上所揭露的仅为本发明一种较佳实施例而已, 当然不能以此来限定本 发明之权利范围, 因此依本发明权利要求所作的等同变化, 仍属本发明所涵 盖的范围。

Claims

权利要求书
1、 一种节目切换的方法, 其特征在于, 包括,
接收终端发送的节目切换请求, 所述节目切换请求中包含终端要切换的 节目标识;
根据所述节目标识, 判断所述要切换的节目不在当前为终端播放节目的 媒体服务器内;
根据所述节目标识, 建立与所述要切换的节目所在的媒体服务器之间的 实时流协议链路, 以便于要切换的节目所在的媒体服务器根据所述节目标识 向所述终端播放切换后的节目。
2、 根据权利要求 1所述的方法, 其特征在于, 所述接收终端发送的节 目切换请求包括,
接收终端通过 RTSP PLAY携带快速切换标识发送的节目切换请求。
3、 根据权利要求 1或 2所述的方法, 所述方法进一歩包括,
断开与当前为终端播放节目的媒体服务器之间的链路。
4、 根据权利要求 3所述的方法, 所述方法进一歩包括,
为媒体控制模块和终端之间的链路, 及所述媒体控制模块与所述要切换 的节目所在的媒体服务器之间的链路设置相同的会话识别号。
5、 根据权利要求 1所述的方法, 所述方法进一歩包括,
根据所述节目标识, 判断所述要切换的节目不在当前为终端播放节目的 媒体服务器以及归属于所述媒体控制模块的其他媒体服务器内;
根据所述节目标识, 将所述节目切换请求发送给所述要切换的节目所在 的媒体服务器归属的媒体控制模块, 以便于所述要切换的节目所在的媒体服 务器归属的媒体控制模块建立与所述要切换的节目所在的媒体服务器之间的 实时流协议链路, 以及要切换的节目所在的媒体服务器根据所述节目标识向 终端播放切换后的节目。
6、 根据权利要求 5所述的方法, 其特征在于, 所述方法进一歩包括, 断开与当前为终端播放节目的媒体服务器之间的链路。
7、 根据权利要求 6所述的方法, 其特征在于, 所述将所述节目切换请 求发送给所述要切换的节目所在的媒体服务器归属的媒体控制模块包括, 将所述节目切换请求发送给业务控制模块, 以便于所述业务控制模块将 所述节目切换请求发送给所述要切换的节目所在的媒体服务器归属的媒体控 制模块; 或,
将所述节目切换请求直接发送给所述要切换的节目所在的媒体服务器归 属的媒体控制模块。
8、 根据权利要求 7所述的方法, 所述方法进一歩包括, 要切换的节目 所在的媒体服务器归属的媒体控制模块为要切换的节目所在的媒体服务器归 属的媒体控制模块和终端之间的 RTSP链路, 及所述要切换的节目所在的媒 体服务器归属的媒体控制模块与所述要切换的节目所在的媒体服务器之间的
RTSP链路设置相同的会话识别号。
9、 一种节目切换的方法, 其特征在于, 包括,
接收用户发送的节目切换请求, 确定要切换的节目不在媒体服务器返回 的节目单内, 向所述要切换的节目所在的媒体服务器归属的媒体控制模块发 送节目切换请求, 以便所述要切换的节目所在的媒体服务器归属的媒体控制 模块与所述要切换的节目所在的媒体服务器建立实时流协议 RTSP链路。
10、 一种节目切换的系统, 其特征在于, 包括,
媒体控制模块, 用于接收终端发送的节目切换请求, 所述节目切换请求 中包含要切换的节目标识; 根据所述节目标识, 判断要切换的节目不在当前 为终端播放节目的媒体服务器内; 并根据所述节目标识, 建立与所述要切换 的节目所在的媒体服务器之间的实时流协议 RTSP链路;
媒体服务器, 用于根据所述节目标识向终端播放切换后的节目。
11、 根据权利要求 10所述的系统, 其特征在于, 所述媒体控制模块进 一歩用于, 根据所述节目标识, 判断所述要切换的节目所在的媒体服务器并不归属 于所述媒体控制模块;
根据所述节目标识, 将所述节目切换请求发送给所述要切换的节目所在 的媒体服务器归属的媒体控制模块, 以便于所述要切换的节目所在的媒体服 务器归属的媒体控制模块建立与所述要切换的节目所在的媒体服务器之间的 实时流协议 RTSP链路后, 由要切换的节目所在的媒体服务器根据所述节目 标识向终端播放切换后的节目。
12、 根据权利要求 10所述的系统, 所述媒体控制模块进一歩用于, 为 所述媒体控制模块和终端之间的链路, 及所述媒体控制模块与所述要切换的 节目所在的媒体服务器之间的链路设置相同的会话识别号。
13、 根据权利要求 12所述的系统, 所述媒体控制模块进一歩用于, 断 开与当前为终端播放节目的媒体服务器之间的链路。
14、 根据权利要求 11所述的系统, 其特征在于, 所述将所述节目切换 请求发送给所述要切换的节目所在的媒体服务器归属的媒体控制模块包括, 将所述节目切换请求发送给业务控制模块, 以便于业务控制模块将所述 节目切换请求发送给所述要切换的节目所在的媒体服务器归属的媒体控制模 块; 或,
将所述节目切换请求直接发送给所述要切换的节目所在的媒体服务器归 属的媒体控制模块。
15、 一种媒体控制模块, 其特征在于, 包括,
接收模块, 用于接收终端发送的节目切换请求, 所述节目切换请求中包 含终端要切换的节目标识;
判断模块, 用于根据所述节目标识, 判断所述要切换的节目不在当前为 终端播放节目的媒体服务器内;
建立模块, 根据所述节目标识, 建立与所述要切换的节目所在的媒体服 务器之间的实时流协议链路, 以便于所述要切换的节目所在的媒体服务器根 据所述节目标识向终端播放切换后的节目。
16、 根据权利要求 15所述的媒体控制模块, 其特征在于, 所述判断模 块进一歩用于, 根据所述节目标识, 判断所述要切换的节目不在当前为终端 播放节目的媒体服务器以及归属于所述媒体控制模块的其他媒体服务器内; 所述建立模块进一歩用于, 根据所述节目标识, 将所述节目切换请求发 送给所述要切换的节目所在的媒体服务器归属的媒体控制模块, 以便于所述 要切换的节目所在的媒体服务器归属的媒体控制模块建立与所述要切换的节 目所在的媒体服务器之间的实时流协议链路, 以及所述要切换的节目所在的 媒体服务器根据所述节目标识向终端播放切换后的节目。
17、 根据权利要求 15所述的媒体控制模块, 其特征在于, 所述媒体控 制模块进一歩包括,
设置模块, 用于为所述媒体控制模块和终端之间的链路, 及所述媒体控 制模块与所述要切换的节目所在的媒体服务器之间的链路设置相同的会话识 别号。
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