CN101123718A - Method and system for multimedia on-demand broadcasting, and multimedia terminal - Google Patents

Abstract

The invention provides a method and system for multimedia on-demand broadcasting, a multimedia terminal and a multimedia system. The method for the multimedia on demand includes: the multimedia terminal sends a call request of the multimedia on demand to the application server, the call request of the multimedia on demand carries the media stream information of the on demand; the multimedia terminal receives the response message of the call request of the multimedia on demand returned by the application server, The address corresponding to the on-demand media stream is carried in the response message of the multimedia on-demand call request; the multimedia terminal obtains the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the multimedia on-demand call request flow. Through the technical solution provided by the embodiment of the present invention, the multimedia terminal can acquire the address of the on-demand media stream, and obtain the on-demand media stream from the multimedia system according to the acquired media stream address, thereby implementing multimedia on-demand on the multimedia terminal.

Description

Method and system for multimedia on-demand broadcasting, and multimedia terminal

technical field

The invention relates to the technical field of Internet communication, in particular to a method and system for multimedia on-demand broadcasting, and a multimedia terminal.

Background technique

Next Generation Network (NGN, Next Generation Network) is a service-driven network, which adopts a comprehensive, open, and integrated network architecture, and achieves relatively independent services through the complete separation of service and call control, call control and bearer. The system makes the business independent of the network. The softswitch as an application server is the control function entity of NGN, which provides call control and connection control functions for services with real-time requirements, and is the core of NGN call and control. As a large-capacity, high-performance application server product, it belongs to the second type of telecommunications equipment (that is, equipment located in the central computer room and without user line interface), which is mainly used in the network control layer of NGN to complete the Internet Protocol (IP, Internet Protocol)-based Functions such as call control and connection management of voice, data, and multimedia services in packet networks.

Common multimedia terminals with multimedia application functions include separate terminals, converged terminals, and pure Session Initiation Protocol (SIP) terminals. Among them, the separation terminal refers to the separation of the ordinary telephone set of the Public Switched Telephone Network (PSTN) and the SIP telephone set of the videophone. After the separation, the multimedia of the SIP telephone is output to the TV, and the built-in SIP telephone of the TV is Generally, there is a network port or an asymmetrical digital subscriber line (ADSL, Asymmetrical Digital Subscriber Line) interface; the fusion terminal refers to the integration of the PSTN ordinary telephone set and the videophone SIP telephone set. The physical entity is one, and the internal logic is divided into PSTN telephone set and A SIP phone has a built-in ADSL interface and network port; a pure SIP terminal is similar to a fusion terminal, the difference is that it has an independent LCD (Liquid Crystal Display) screen, such as the VP8220 terminal or MC820 terminal on the market.

Wherein, the SIP phone performs multimedia communication on the IP network based on the SIP protocol. The SIP protocol is an application-layer control protocol for multimedia communication on an IP network proposed and hosted by the IETF. It is used to create, modify, and terminate a session process in which one or more participants participate. These sessions include Internet multimedia conferencing, Internet telephony, distance education, and telemedicine. All interactive two-party or multi-party multimedia communication activities on the Internet are collectively referred to as multimedia sessions.

Multimedia on demand (VOD, Video On Demand) means that the user can browse and operate the corresponding multimedia content in the multimedia library on the multimedia interface of the terminal, and the multimedia library has rich multimedia content. At present, a multimedia terminal with a multimedia application function cannot implement multimedia on demand through a multimedia on demand call request.

Therefore, during the creation process of the present invention, the inventor found at least the following problems in the prior art: in the technical solution provided by the prior art, the multimedia terminal cannot implement multimedia on-demand by initiating a multimedia on-demand call request.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and system for multimedia on-demand, and a multimedia terminal, which can implement multimedia on-demand through a multimedia on-demand call.

In order to solve the above technical problems, the purpose of the embodiments of the present invention is achieved through the following technical solutions:

Embodiments of the present invention provide a method for multimedia on-demand, including:

The multimedia terminal sends a multimedia on-demand call request to the application server, and the multimedia on-demand call request carries on-demand media stream information;

The multimedia terminal receives the response message of the multimedia on-demand call request returned by the application server, and the response message of the multimedia-on-demand call request carries an address corresponding to the on-demand media stream;

The multimedia terminal acquires the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the multimedia on-demand call request.

The embodiment of the present invention also provides a multimedia on-demand system, including;

The multimedia terminal is used to send a call request for multimedia on-demand, carrying the on-demand media stream information, and obtain the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the returned multimedia on-demand call request;

The multimedia system is configured to receive a multimedia on-demand call request sent by a multimedia terminal, and return a response message to a multimedia on-demand call request carrying an address corresponding to the on-demand media stream to the multimedia terminal according to the multimedia on-demand call request, and Provide the multimedia terminal with the media stream requested by the multimedia terminal.

The embodiment of the present invention also provides a system for multimedia on demand, including:

The multimedia terminal is configured to send a call request for multimedia on-demand, and obtain the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the returned multimedia on-demand call request;

The service agent is configured to receive the call request of the multimedia on demand sent by the multimedia terminal, and return the multimedia on demand message carrying the address corresponding to the on demand media stream according to the on demand media stream information carried in the call request of the multimedia on demand. The response message of the call request to the multimedia system;

The multimedia system is used to provide the multimedia terminal with the media stream on demand of the multimedia terminal.

The embodiment of the present invention also provides a multimedia terminal, including:

A sending unit, configured to send a call request for multimedia on demand;

The receiving unit is used to receive the returned response message of the call request of the multimedia on demand, and the response message of the call request of the multimedia on demand carries the address corresponding to the media stream on demand;

The media stream acquisition unit is configured to acquire the on-demand media stream according to the address corresponding to the on-demand media stream received by the receiving unit.

Through the multimedia on-demand method and system and the multimedia terminal provided by the embodiments of the present invention, the multimedia terminal can obtain the address of the on-demand media stream by initiating a multimedia on-demand call request, and obtain the on-demand media stream from the multimedia system according to the acquired media stream address , so as to implement multimedia on demand by initiating a multimedia on demand call request.

Description of drawings

Fig. 1 is the signaling flowchart of the first embodiment of the method for multimedia on demand of the present invention;

Fig. 2 is the signaling flowchart of the second embodiment of the method for multimedia on demand of the present invention;

Fig. 3 is the signaling flowchart of the third embodiment of the method for multimedia on demand in the present invention;

Fig. 4 is the signaling flowchart of the fourth embodiment of the method for multimedia on demand according to the present invention;

Fig. 5 is the flow chart of the fifth embodiment of the method for multimedia on demand of the present invention;

Fig. 6 is the structural diagram of the first embodiment of the system of multimedia on demand of the present invention;

FIG. 7 is a structural diagram of the second embodiment of the multimedia on-demand system of the present invention.

Detailed ways

Embodiments of the present invention provide a method and system for multimedia on-demand, and a multimedia terminal. In order to make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

Please refer to FIG. 1 , which is a flow chart of the first embodiment of the multimedia on-demand method of the present invention. In this embodiment, the multimedia terminal is a converged terminal, the multimedia system is in a streaming media server (Media Server), and the converged terminal directly requests multimedia on demand from the Media Server based on the application server.

The concrete process of the method for described multimedia on demand includes:

Step 101: the user sends a call request for multimedia on-demand to the application server through the converged terminal, and carries the on-demand media stream information;

In this embodiment, the application server is a softswitch, such as SX3000.

The multimedia on demand call request may carry a multimedia on demand access code.

For example, when the multimedia on-demand access code is 999, the application server translates the multimedia on-demand access code 999 into the call address 28780999 of the multimedia system through an external address translation database (such as SHLR9200). The call request for multimedia on demand is routed to the Media Server corresponding to 28780999.

The on-demand media stream information may be a code corresponding to the media stream, for example, code 12345 indicates video program A, code 54321 indicates audio program B, and so on.

Step 102: the application server forwards the call request of the multimedia on demand to the streaming media server;

The multimedia on-demand call request may also carry the subscription information of the converged terminal, and before forwarding the multimedia on-demand call request, the application server may also authenticate the multimedia on-demand call request according to the subscription information, if If the authentication succeeds, forward the call request of the multimedia on demand; if the authentication fails, then refuse to forward the call request of the multimedia on demand.

Step 103: the streaming media server returns the response message of the call request of multimedia on demand to the application server, carrying the address corresponding to the media stream on demand, that is, the real-time streaming protocol (RTSP, Real Time Streaming Protocol) unified resource of the media stream in the streaming media server Identifier (URI, Uniform ResourceIdentifier) address;

The response message of the call request of multimedia on demand is a SIP 3XX message, such as a SIP 302 message.

SIP 3XX message generally supports telephone (TEL, Telephone) URI/SIP URI, and because in the present embodiment, SIP 3XX message needs to carry the address of media flow in the streaming media server, therefore needs to expand SIP

The URI address in the 3XX message, so that the SIP 3XX message also supports RTSP URI.

The following example illustrates the format of the extended SIP 302 message:

SIP/2.0302Moved Temporarily

Via:SIP/2.0/UDP 182.20.20.100:5061; branch＝z9hG4bKa271bd8c4

Call-ID: e870d228a24d260c0d6acbb3a271bd8c@182.20.20.100

From:<sip:07558880001@182.20.20.100; user=phone>; tag=a271bd8c

To:<sip:10001@182.20.70.100; user=phone>; tag=41b092cb

CSeq: 1 INVITE

Contact: <rtsp://media.example.com:554/twister>

Content-Length:...

Among them, the RTSP URI is in the Contact field of SIP 302.

Step 104: The application server forwards the response message of the multimedia on-demand call request to the fusion terminal;

Step 105: the fusion terminal returns a confirmation message to the application server;

Step 106: the application server forwards the confirmation message to the streaming media server;

The following is the RTSP standard session process between the fusion terminal and the streaming media server, that is, the specific process for the fusion terminal to obtain the required media stream from the streaming media server:

Step 107: According to the URI address of the streaming media server media stream carried in the response message of the call request of the multimedia on demand, the fusion terminal sends an RTSP connection request to the streaming media server;

Step 108: the streaming media server returns a response message that the RTSP connection is successful to the fusion terminal;

Step 109: the fusion terminal sends an option (OPTION) request to the streaming media server, requesting the streaming media server to provide the message type it supports;

Step 110: The streaming media server returns a response message to the OPTION request to the fusion terminal, carrying the message type supported by the streaming media server;

Step 111: the fusion terminal sends a description (DESCRIBE) request to the streaming media server, requesting the streaming media server to provide its specific connection information, such as port address, etc.;

Step 112: the streaming media server returns a DESCRIBE request response message to the fusion terminal, carrying the specific connection information of the streaming media server;

Step 113: the fusion terminal sends a multimedia information (such as audio, video, etc.) establishment request to the streaming server;

Step 114: The streaming media server returns a response message of the multimedia information establishment request to the fusion terminal;

Step 115: According to the multimedia information requested by the user, the fusion terminal sends a play (PLAY) request to the streaming media server;

Step 116: the streaming media server returns a response message of the PLAY request to the fusion terminal;

Step 117: The streaming media server sends the media stream corresponding to the multimedia information requested by the user to the converged terminal.

For a pure SIP terminal, it is similar to the above-mentioned multimedia on-demand process of a converged terminal. The separate terminal sends a call request for multimedia on demand through remote dialing (for example, dialing with a TV remote controller), and other processes are similar to those of the converged terminal. Therefore, no further description will be given.

Please refer to FIG. 2 , which is a flow chart of the second embodiment of the multimedia on-demand method of the present invention. In this embodiment, the multimedia terminal is a converged terminal, and the multimedia system is in a web server (Web Server), and the converged terminal indirectly requests multimedia on demand from the Web Server through a service agent based on the application server.

The concrete process of the method for described multimedia on demand includes:

Step 201: the user sends a call request for multimedia on demand to the application server through the converged terminal;

In this embodiment, the application server is a softswitch.

The multimedia on demand call request may carry a multimedia on demand access code.

Step 202: the application server forwards the call request of the multimedia on demand to the service agent;

The multimedia on-demand call request may also carry the subscription information of the converged terminal, and before forwarding the multimedia on-demand call request, the application server may also authenticate the multimedia on-demand call request according to the subscription information, if If the authentication succeeds, forward the call request of the multimedia on demand; if the authentication fails, then refuse to forward the call request of the multimedia on demand.

Step 203: the service agent translates the multimedia-on-demand access code carried by the call request of the multimedia-on-demand, obtains the number of the multimedia system, and obtains the hypertext transfer protocol (HTTP, Hyper Text) of the network server corresponding to the number of the multimedia system Transport Protocol) URI address;

The corresponding relationship between the number of the multimedia system and the HTTP URI address of the network service is stored in the service agent.

For example, when the multimedia on-demand access code is 999, the service agent translates the multimedia on-demand access code 999 into the calling address 28780999, and obtains the URI address of the network server corresponding thereto according to 28780999.

Step 204: the service agent returns the response message of the call request of multimedia on demand to the application server, carrying the HTTP URI address of the network server;

The response message of the call request of multimedia on demand is a SIP 3XX message, such as a SIP 302 message.

SIP 3XX messages generally support TEL URI/SIP URI, and because in the present embodiment, SIP 3XX message needs to carry the HTTP URI address of network server, therefore need to expand the URI address in the SIP 3XX message, make SIP 3XX message also support HTTP URI.

The following example illustrates the format of the extended SIP 302 message:

SIP/2.0302Moved Temporarily

Via:SIP/2.0/UDP 182.20.20.100:5061; branch＝z9hG4bKa271bd8c4

Call-ID: e870d228a24d260c0d6acbb3a271bd8c@182.20.20.100

From:<sip:07558880001@182.20.20.100; user=phone>; tag=a271bd8c

To:<sip:10001@182.20.70.100; user=phone>; tag=41b092cb

CSeq: 1 INVITE

Contact: <http://www.buawei.com>

Content-Length:...

Among them, the HTTP URI is in the Contact field of SIP 302.

Step 205: The application server forwards the response message of the multimedia on-demand call request to the fusion terminal;

Step 206: the fusion terminal returns a confirmation message to the application server;

Step 207: the application server forwards the confirmation message to the service agent;

The following is the HTTP standard session process between the fusion terminal and the network server, that is, the process that the fusion terminal obtains the address corresponding to the on-demand media stream, that is, the process of the RTSP URI of the on-demand media stream in the network server:

Step 208: According to the HTTP URI address of the network server carried in the response message of the call request of the multimedia on-demand program, the fusion terminal sends a transmission control protocol (TCP, Transmission Control Protocol) connection request to the network server;

Step 209: the network server returns a TCP connection success response message to the fusion terminal;

Step 210: According to the media stream required by the user, the fusion terminal sends an HTTP request to the network server;

Step 211: the web server returns a response message to the HTTP request to the fusion terminal, carrying the RTSP URI of the media stream required by the user on the web server;

The following is the RTSP standard session process between the fusion terminal and the network server, that is, the specific process for the fusion terminal to obtain the required media stream from the network server:

Step 212: According to the RTSP URI of the media stream carried in the response message of the HTTP request in the network server, the fusion terminal sends an RTSP connection request to the network server;

Step 213: the network server returns a response message that the RTSP connection is successful to the fusion terminal;

Step 214: the fusion terminal sends an option (OPTION) request to the network server, requesting to obtain the message type supported by the network server;

Step 215: The network server returns a response message of the OPTION request to the fusion terminal, carrying the message type supported by the network server;

Step 216: the fusion terminal sends a description (DESCRIBE) request to the network server, requesting to obtain specific information of the network server, such as the address and port information of the network server;

Step 217: The network server returns a DESCRIBE request response message to the fusion terminal, carrying specific information of the network server;

Step 218: the fusion terminal sends a media stream (such as audio, multimedia, etc.) establishment request to the network server;

Step 219: the network server returns a response message to the media stream establishment request to the converged terminal;

Step 220: According to the media stream requested by the user, the fusion terminal sends a play (PLAY) request to the network server;

Step 221: the network server returns a response message of the PLAY request to the fusion terminal;

Step 222: The network server sends the media stream requested by the user to the converged terminal.

For a pure SIP terminal, it is the same as the above-mentioned multimedia on-demand process of the converged terminal. Therefore, no further description will be given.

Please refer to FIG. 3 , which is a flowchart of a third embodiment of the multimedia on-demand method of the present invention. In this embodiment, the multimedia terminal is a separate terminal, the multimedia system is located in the streaming media server, and the separate terminal indirectly requests multimedia on-demand from the streaming media server through the service agent based on the application server.

The concrete process of the method for described multimedia on demand includes:

Step 301: the user sends a call request for multimedia on-demand to the application server through the public switched telephone network (PSTN, Public Switched Telephone Network) phone of the separate terminal, and carries the on-demand media stream information;

In this embodiment, the application server is a softswitch.

The on-demand media stream information may be a code corresponding to the media stream, for example, code 12345 indicates video program A, code 54321 indicates audio program B, and so on.

The multimedia on demand call request may carry a multimedia on demand access code.

Step 302: the application server forwards the call request of the multimedia on demand to the service agent;

The multimedia on-demand call request may also carry the subscription information of the converged terminal, and before forwarding the multimedia on-demand call request, the application server may also authenticate the multimedia on-demand call request according to the subscription information, if If the authentication succeeds, forward the call request of the multimedia on demand; if the authentication fails, then refuse to forward the call request of the multimedia on demand.

Step 303: the service agent translates the multimedia on-demand access code and the media stream information carried by the call request of the multimedia on-demand, and obtains the address corresponding to the on-demand media stream, that is, the RTSP URI address of the media stream in the streaming server;

The service agent stores the correspondence between multimedia on-demand codes, media stream information and RTSP URI addresses.

Step 304: the service agent returns the response message of the call request of multimedia on demand to the application server, carrying the RTSP URI address of the media flow in the streaming server;

The response message of the call request of multimedia on demand is a SIP 3XX message, such as a SIP 302 message.

SIP 3XX messages generally support TEL URI/SIP URI, and because in this embodiment, SIP 3XX messages need to carry the RTSP URI address of the media flow in the media streaming server, so it is necessary to expand the URI address in the SIP3XX message so that the SIP 3XX message also supports RTSP URIs. It can be expanded as shown in Embodiment 1.

Step 305: The application server queries the external database to obtain the SIP phone address bound to the separated terminal;

Step 306: the application server encapsulates the URI address of the streaming media server in the BODY of the SIP INFO message and sends it to the SIP phone bound to the separation terminal;

SIPINFO message generally supports TEL URI/SIP URI, and because in the present embodiment, SIP INFO message needs to carry the address of streaming media server, therefore needs to expand the URI address in the SIP INFO message, makes SIP INFO message also support RTSP URI.

The following example illustrates the format of the extended SIP INFO message:

INFO sip:075589834250@10.75.35.161; user＝phone SIP/2.0

Via:SIP/2.0/UDP 10.70.106.82:5060; branch＝z9hG4bK3883054875

From:<sip:114@10.75.35.161; user=phone>; tag=1451640803

To:<sip:075589834250@10.75.35.161; user=phone>

Call-ID: EC78236491@10.70.106.82

CSeq:29INFO

Max-Forwards: 5

Subject: Client Request

Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, REFER, SUBSCRIBE, NOTIFY, INFO, INFO

Content-Type: text/xml

Content-Length: ..

<inf>

<cmd>3110</cmd>

<linkuri>******************</linkuri>

<cont>********************</cont>

<autolink>0</autolink>

</inf>

Wherein, the INFO message body is in XML format, and the maximum length of the message body is 512 bytes. The <Cont> parameter (Tag) and <linkuri>Tag are encrypted with base64, and only these two fields are encrypted. <Cont>Tag is the information content of the displayed multimedia system, which can be text information, and can also contain one or more link addresses. <Linkuri>Tag is the link address, which can be HTTP URI or RTSP URI. <autolink>Tag is whether to link automatically, 1 means automatic link, 0 means user selection.

If the terminal receives only <cont> in the INFO message, it will display the information content of the multimedia system on the terminal; if it only contains <linkuri>, the terminal can decide whether to automatically link to the URI in the <Linkuri>Tag according to the command code and parameters ; If it contains both <cont> and <linkuri>, then display the content of the multimedia system on the terminal and download it according to the URI in the <Linkuri>Tag, and the terminal can decide whether to automatically link to the <linkuri>Tag according to the command code and parameters URI, or it is up to the user to choose whether to link.

Step 307: the application server returns an ACK response message to the service agent;

Step 308: The SIP phone bound to the separation terminal returns a SIP 200 response message to the application server;

Step 309: the application server sends a release (RELCOM/REL) message to the PSTN phone used by the separated terminal user, to inform the PSTN phone that the call process is over;

The following is the RTSP standard session process between the separation terminal and the streaming media server:

Step 310: according to the RTSP URI address of the streaming media server carried in the INFO message, the SIP phone of the separation terminal sends an RTSP connection request to the streaming media server;

Step 311: the streaming media server returns a RTSP connection success response message to the SIP phone of the separated terminal;

Step 312: the SIP phone of the separated terminal sends an OPTION request to the streaming media server, requesting the streaming media server to provide the multimedia menu of the multimedia system;

Step 313: The streaming media server returns a response message to the OPTION request to the SIP phone of the separate terminal, carrying the multimedia menu of the multimedia system;

Step 314: the SIP phone of the separated terminal sends a DESCRIBE request to the streaming media server;

Step 315: The streaming media server returns a DESCRIBE request response message to the SIP phone of the separated terminal;

Step 316: the SIP phone of the separated terminal sends audio and multimedia establishment requests to the streaming media server;

Step 317: The streaming media server returns a response message to the audio and multimedia setup request to the SIP phone of the separated terminal;

Step 318: According to the audio and multimedia requested by the user, the SIP phone of the separated terminal sends a PLAY request to the streaming media server;

Step 319: the streaming media server returns a response message of the PLAY request to the SIP phone of the separated terminal;

Step 320: The streaming media server sends the media stream corresponding to the audio and multimedia requested by the user to the SIP phone of the separate terminal.

Please refer to FIG. 4 , which is a flowchart of a fourth embodiment of the multimedia on-demand method of the present invention. The application scenario of this embodiment is an IP Multimedia Subsystem (IMS, IP Multimedia Subsystem) system, the multimedia terminal is a separate terminal, and the media stream is ordered to the multimedia system through the service agent.

The concrete process of described multimedia on demand includes:

Step 401: The separation terminal PSTN phone sends a video-on-demand call request to the application server, and carries the on-demand media stream information;

In this embodiment, the application server is a SIP server.

The on-demand media stream information may be a code corresponding to the media stream, for example, code 12345 indicates video program A, code 54321 indicates audio program B, and so on.

The multimedia on demand call request may carry a multimedia on demand access code.

Step 402: The SIP server forwards the call request of the multimedia on demand to the call session control function unit (S-CSCF, Serving-Call Session Control Function);

Step 403: S-CSCF forwards the call request of the multimedia on demand to the second proxy call session control function unit (P-CSCF, Proxy-Call Session Control Function);

The second proxy call session control function unit connects the service proxy to the IMS core network.

Step 404: The second P-CSCF forwards the call request of the multimedia on demand to the service agent;

Step 405: The service agent returns the response message of the call request of the multimedia on demand to the second P-CSCF, carrying the RTSP URI address of the media stream in the streaming media server;

The response message of the call request of multimedia on demand is a SIP 3XX message, such as a SIP 302 message.

SIP 3XX messages generally support TEL URI/SIP URI, and because in this embodiment, SIP 3XX messages need to carry the RTSP URI address of media flow in the media flow server, therefore need to expand SIP

The URI address in the 3XX message, so that the SIP 3XX message also supports RTSP URI. It can be expanded as shown in Embodiment 1.

Step 406: The second P-CSCF forwards the response message of the multimedia on-demand call request to the S-CSCF;

Step 407: S-CSCF forwards the response message of the multimedia on-demand call request to the SIP server;

Step 408: The SIP server encapsulates the URI address of the streaming media server in the BODY of the SIP INFO message and sends it to the S-CSCF;

SIP INFO message generally supports TEL URI/SIP URI, and because in the present embodiment, SIP INFO message needs to carry the address of streaming media server, therefore needs to expand the URI address in the SIP INFO message, makes SIP INFO message also support RTSP URI.

Step 409: S-CSCF forwards the SIP INFO message to the first P-CSCF;

The first proxy call session control function unit connects the SIP phone of the separated terminal to the IMS core network.

Step 410: The first P-CSCF forwards the SIP INFO to the PSTN phone of the separated terminal;

Step 411: The PSTN phone of the separated terminal forwards the SIP INFO message to the SIP phone of the separated terminal;

Step 412: the SIP phone of the separated terminal returns a SIP 200 response message to the PSTN phone of the separated terminal;

Step 413: The PSTN phone of the separated terminal forwards the SIP 200 response message to the first P-CSCF;

Step 414: The first P-CSCF forwards the SIP 200 response message to the S-CSCF;

Step 415: S-CSCF forwards the SIP 200 response message to the SIP server;

Step 416: The SIP server returns an ACK message to the S-CSCF;

Step 417: The S-CSCF forwards the ACK message to the second P-CSCF;

Step 418: The second P-CSCF forwards the ACK message to the service agent;

Step 419: The SIP server sends a REL message to the PSTN phone of the separated terminal, for notifying the PSTN phone that the call process is over.

Next, according to the RTSP URI address of the streaming media server carried in the INFO message, the SIP phone obtains the process of the on-demand media stream from the multimedia system similar to the foregoing embodiment, and no further description is given here.

Please refer to FIG. 5 , which is a flowchart of a fifth embodiment of the multimedia on-demand method of the present invention. The application scenario of this embodiment is an IP Multimedia Subsystem (IMS, IP Multimedia Subsystem) system, the multimedia terminal is a converged terminal, and the media stream is ordered to the multimedia system through the service agent.

The concrete process of described multimedia on demand includes:

Step 501: The fusion terminal sends a video-on-demand call request to the first P-CSCF, and carries the on-demand media stream information;

In this embodiment, the application server is a SIP server.

The first P-CSCF connects the converged terminal to the IMS core network.

The on-demand media stream information may be a code corresponding to the media stream, for example, code 12345 indicates video program A, code 54321 indicates audio program B, and so on.

The multimedia on demand call request may carry a multimedia on demand access code.

Step 502: The first P-CSCF forwards the call request of the multimedia on demand to the S-CSCF;

Step 503: S-CSCF forwards the call request of the multimedia on demand to the SIP server;

Step 504: The SIP server forwards the call request of the multimedia on demand to the S-CSCF;

Step 505: S-CSCF forwards the call request of multimedia on demand to the second P-CSCF;

The second proxy call session control function unit connects the service proxy to the IMS core network.

Step 506: The second P-CSCF forwards the call request of the multimedia on demand to the service agent;

Step 507: The service agent returns the response message of the call request of the multimedia on demand to the second P-CSCF, carrying the RTSP URI address of the media stream in the streaming media server;

The response message of the call request of multimedia on demand is a SIP 3XX message, such as a SIP 302 message.

SIP 3XX messages generally support TEL URI/SIP URI, and because in this embodiment, SIP 3XX messages need to carry the RTSP URI address of the media flow in the media streaming server, so it is necessary to expand the URI address in the SIP3XX message so that the SIP 3XX message also supports RTSP URIs. It can be expanded as shown in Embodiment 1.

Step 508: The second P-CSCF forwards the response message SIP302 of the multimedia on-demand call request to the S-CSCF;

Step 509: S-CSCF forwards the response message SIP 302 of the call request of the multimedia on demand to the server;

Step 510: The SIP server forwards the response message SIP 302 of the call request of the multimedia on demand to the S-CSCF;

Step 511: The S-CSCF forwards the SIP 302 message to the first P-CSCF;

Step 512: The first P-CSCF forwards the SIP 302 to the fusion terminal;

Step 513: The fusion terminal returns an ACK response message to the first P-CSCF;

Step 514: The first P-CSCF forwards the ACK response message to the S-CSCF;

Step 515: S-CSCF forwards the ACK response message to the SIP server;

Step 516: The SIP server returns an ACK message to the S-CSCF;

Step 517: The S-CSCF forwards the ACK message to the second P-CSCF;

Step 518: The second P-CSCF forwards the ACK message to the service agent.

Next, according to the RTSPURI address of the streaming media server carried in the SIP 302 message, the fusion terminal obtains the process of the on-demand media stream from the multimedia system similar to the foregoing embodiment, and will not be further described here.

Please refer to FIG. 6 , which is a structural diagram of the first embodiment of the multimedia on-demand system of the present invention. The multimedia on-demand system includes a multimedia terminal 61 , an application server 62 and a multimedia system 63 .

The multimedia terminal 61 is used to send the call request of the multimedia on demand to the application server 62, and according to the address corresponding to the media stream on demand carried in the response message of the call request of the multimedia on demand returned by the application server 62, obtain from the multimedia system 63 On-demand media streaming.

The application server 62 is configured to forward the multimedia on demand call request sent by the multimedia terminal 61, and forward the received response message of the multimedia on demand call request to the multimedia terminal 61, the response message of the multimedia on demand call request carrying and The address corresponding to the on-demand media stream.

The multimedia system 63 is configured to receive the multimedia on demand call request forwarded by the application server 62, and return a response message of the multimedia on demand call request carrying the address corresponding to the on demand media stream according to the multimedia on demand call request Establish a connection with the application server 62 and the multimedia terminal 61, and provide the multimedia terminal 61 with the media stream requested by the multimedia terminal 61.

The multimedia terminal 61 can be a converged terminal, a separate terminal, or a pure SIP terminal, which includes a sending unit 611 , a receiving unit 612 , an address obtaining unit 613 , and a media stream obtaining unit 614 .

The sending unit 611 is configured to send the call request of the multimedia on demand to the application server; the receiving unit 612 is configured to receive the response message of the call request of the multimedia on demand forwarded by the application server, and the response message of the call request of the multimedia on demand carry the address corresponding to the on-demand media stream; the address obtaining unit 613 is used to obtain the address of the multimedia system, and provide the address of the obtained multimedia system to the sending unit 611, and the sending unit 611 according to the obtained media system Address, sending a request to obtain the on-demand media stream to the multimedia system 63; the media stream obtaining unit 614 sends a request to the multimedia system to obtain the on-demand media stream according to the address corresponding to the on-demand media stream received by the receiving unit , and get the on-demand media stream.

The multimedia system 63 includes a receiving unit 631 , a sending unit 632 , and a media stream providing unit 636 .

The receiving unit 631 is used to receive the call request of the multimedia on demand forwarded by the application server 62; The response message of the call request is sent to the application server 62, and the address corresponding to the media stream on demand is carried in the response message of the call request of the multimedia on demand; The stream request provides the multimedia terminal 61 with an on-demand media stream.

Please refer to FIG. 7 , which is a structural diagram of the second embodiment of the multimedia on-demand system of the present invention. The multimedia on-demand system includes a multimedia terminal 71 , an application server 72 , a service agent 73 , and a multimedia system 74 .

The multimedia terminal 71 is used to send the call request of multimedia on demand to the application server 72, and according to the address corresponding to the media stream on demand carried in the response message of the call request of the multimedia on demand returned by the application server 72, obtain from the multimedia system 74 On-demand media streaming.

The application server 72 is configured to forward the multimedia on demand call request sent by the multimedia terminal 71, and forward the received response message of the multimedia on demand call request to the multimedia terminal 71, the response message of the multimedia on demand call request carrying and The address corresponding to the on-demand media stream.

The service agent 73 is used for receiving the call request of the multimedia on demand forwarded by the application server 72, and according to the call request of the multimedia on demand, returning the response of the call request of the multimedia on demand carrying the address corresponding to the media flow on demand message to the application server 72;

The multimedia system 74 is configured to provide the multimedia terminal 71 with the media stream requested by the multimedia terminal 71 .

The multimedia terminal 71 can be a converged terminal, a separate terminal, or a pure SIP terminal, which includes a sending unit 711 , a receiving unit 712 , an address obtaining unit 713 , and a media stream obtaining unit 714 .

The sending unit 711 is configured to send the call request of the multimedia on demand to the application server; the receiving unit 712 is configured to receive the response message of the call request of the multimedia on demand forwarded by the application server, and the response message of the call request of the multimedia on demand carry the address corresponding to the media stream on demand; the address obtaining unit 713 is used to obtain the address of the multimedia system 74, and provide the address of the obtained multimedia system to the sending unit 711, and the sending unit 711 according to the obtained media system address, and send a request to obtain the on-demand media stream to the multimedia system 74; the media stream obtaining unit 714 is used to carry the corresponding information of the on-demand media stream in the response message of the multimedia on-demand call request received by the receiving unit 712 Address, send a request for obtaining the on-demand media stream to the multimedia system 74, and obtain the on-demand media stream.

The service agent 73 includes a receiving unit 731 , a storage unit 733 , a query unit 734 , and a sending unit 735 .

The receiving unit 731 is used to receive the call request of the multimedia on demand forwarded by the application server 72, and the call request of the multimedia on demand carries the media flow information of the on demand; the storage unit 733 is used to store the correspondence between the media flow information and the media flow address Relation; the on-demand media stream information in the call request received by the receiving unit 731 of the query unit 734, query the storage unit 733, and obtain the media stream address corresponding to the media stream information; the sending unit 735 The response message for sending the call request of multimedia on demand to the application server 72 carries the address of the media stream obtained by the query unit 734 .

Through the multimedia on-demand method and system and the multimedia terminal provided by the embodiments of the present invention, the multimedia terminal can obtain the address of the on-demand media stream by initiating a multimedia on-demand call request, and obtain the on-demand media stream from the multimedia system according to the acquired media stream address , so as to implement multimedia on demand by initiating a multimedia on demand call request.

Above, a kind of multimedia on-demand method and system and multimedia terminal provided by the present invention have been introduced in detail. In this paper, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understanding The technical solution disclosed in the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood To limit the present invention.

Claims (22)

1. A method for multimedia on demand, comprising: The multimedia terminal sends a multimedia on-demand call request to the application server, and the multimedia on-demand call request carries on-demand media stream information; The multimedia terminal receives the response message of the multimedia on-demand call request returned by the application server, and the response message of the multimedia-on-demand call request carries an address corresponding to the on-demand media stream; The multimedia terminal acquires the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the multimedia on-demand call request. 2. The method for multimedia on-demand according to claim 1, characterized in that, after the multimedia terminal sends the call request of multimedia on-demand to the application server, it also includes: The application server routes the call request of the multimedia on demand to the multimedia system; The multimedia system returns the response message of the multimedia on-demand call request to the application server, carrying the address corresponding to the on-demand media stream, according to the on-demand media stream information carried in the multimedia on-demand call request. 3. The method for multimedia on demand according to claim 2, wherein the call request of the multimedia on demand includes a multimedia on demand access code, and then the application server routes the call request of the multimedia on demand to the multimedia system specific The process includes: The application server translates the multimedia on-demand access code into a calling address of the multimedia system; The application server routes the multimedia on demand call request to the multimedia system according to the calling address of the multimedia system. 4. The method for multimedia on-demand according to claim 1, characterized in that, after the multimedia terminal sends the call request of multimedia on-demand to the application server, it also includes: The application server routes the call request of the multimedia on demand to the service agent; According to the on-demand media stream information carried in the multimedia on-demand call request, the service agent returns a response message of the multimedia on-demand call request to the application server, carrying an address corresponding to the on-demand media stream. 5. the method for multimedia on demand according to claim 4, is characterized in that, before the response message of the call request that described service agent returns the call request of multimedia on demand to application server, comprises: The service agent queries the correspondence between media stream information and media stream addresses according to the on-demand media stream information carried in the multimedia on-demand call request, and obtains the address corresponding to the on-demand media stream. 6. the method for multimedia on demand according to claim 1, is characterized in that, multimedia terminal sends the call request of multimedia on demand, also includes before carrying the media stream information of on demand: The multimedia terminal obtains the address of the multimedia system; The multimedia terminal establishes a connection with the multimedia system according to the address of the multimedia system. 7. The method for multimedia on-demand according to claim 1, wherein the multimedia terminal obtains the specific process of the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the call request of the multimedia on-demand include: The multimedia terminal sends and establishes a Real Time Streaming Protocol (RTSP, Real Time Streaming Protocol) connection request to the multimedia system according to the address corresponding to the on-demand media stream carried in the response message of the call request of the multimedia on-demand; The multimedia system returns an RTSP connection success response message to the multimedia terminal; The multimedia terminal sends a request for obtaining the on-demand media stream to the multimedia system; The multimedia system returns to the multimedia terminal a response message to obtain the on-demand media stream request; The multimedia terminal receives on-demand media streams from the multimedia system. 8. the method for multimedia on demand according to claim 1, is characterized in that, the response message of the call request of described multimedia on demand is the SIP message through extension, and described SIP message supports RTSPURI or hypertext transfer protocol (HTTP, Hypertext Transfer Protocol) Text Transport Protocol) URI. 9. The method for multimedia on-demand according to any one of claims 1 to 8, wherein the multimedia terminal is a fusion terminal or a pure SIP terminal. 10. The method for multimedia on-demand according to any one of claims 1 to 8, wherein the multimedia terminal is a separate terminal. 11. The method for multimedia on demand according to claim 10, characterized in that, before the multimedia terminal receives the response message of the call request of the multimedia on demand returned by the application server, it also includes: The application server queries the external database to obtain the address of the SIP phone bound to the PSTN phone of the separation terminal. 12. The method for multimedia on-demand according to any one of claims 1 to 8, wherein the multimedia terminal is a streaming media server or a network server. 13. A multimedia on-demand system, characterized in that it comprises: The multimedia terminal is used to send a call request for multimedia on-demand, carrying the on-demand media stream information, and obtain the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the returned multimedia on-demand call request; The application server is configured to forward the multimedia-on-demand call request sent by the multimedia terminal to the multimedia system, and forward the response message of the multimedia-on-demand call request received from the multimedia system to the multimedia terminal, wherein the response message of the multimedia-on-demand call request Carry the address corresponding to the on-demand media stream; The multimedia system is configured to receive a multimedia on demand call request sent by the application server, and return a response message of the multimedia on demand call request carrying an address corresponding to the on demand media stream to the application server according to the multimedia on demand call request, and Provide the multimedia terminal with the media stream requested by the multimedia terminal. 14. The system of multimedia on demand according to claim 13, is characterized in that, described multimedia terminal comprises: A sending unit, configured to send a call request for multimedia on-demand to the application server, carrying the on-demand media stream information; The receiving unit is configured to receive a response message of the multimedia on-demand call request forwarded by the application server, wherein the response message of the multimedia-on-demand call request carries an address corresponding to the on-demand media stream; The media stream acquiring unit is configured to send a request for acquiring the on-demand media stream to the multimedia system according to the address corresponding to the on-demand media stream received by the receiving unit, and acquire the on-demand media stream. 15. The system of multimedia on demand according to claim 14, is characterized in that, described multimedia terminal also comprises: The address obtaining unit is used to obtain the address of the multimedia system, and provide the obtained address of the multimedia system to the sending unit, and the sending unit sends a request for obtaining the on-demand media stream to the multimedia system according to the obtained address of the media system. 16. The system of multimedia on demand according to claim 15, characterized in that, the multimedia system comprises: The receiving unit is used to receive the call request of multimedia on-demand forwarded by the application server, and carry the on-demand media stream information; The sending unit is configured to return a response message of the multimedia-on-demand call request to the application server according to the on-demand media stream information carried in the multimedia-on-demand call request received by the receiving unit, and the response message of the multimedia-on-demand call request carries the same content as The address corresponding to the on-demand media stream; The media stream providing unit is configured to provide the on-demand media stream to the multimedia terminal according to the request sent by the multimedia terminal for acquiring the on-demand media stream. 17. A multimedia on-demand system, characterized in that it comprises: The multimedia terminal is configured to send a call request for multimedia on-demand, and obtain the on-demand media stream according to the address corresponding to the on-demand media stream carried in the response message of the returned multimedia on-demand call request; The application server is configured to forward the multimedia on demand call request sent by the multimedia terminal to the service agent, and forward the response message of the multimedia on demand call request received from the multimedia system to the multimedia terminal, wherein the response message of the multimedia on demand call request Carry the address corresponding to the on-demand media stream; The service agent is configured to receive the call request of the multimedia on demand forwarded by the application server, and return the multimedia on demand message carrying the address corresponding to the media stream on demand according to the on demand media flow information carried in the call request of the multimedia on demand. A response message to the call request is sent to the application server; The multimedia system is used to provide the multimedia terminal with the media stream on demand of the multimedia terminal. 18. The system of multimedia on demand according to claim 17, wherein said service agent comprises: The receiving unit is used to receive the call request of the multimedia on demand sent by the application server, and the call request of the multimedia on demand carries the media stream information of the on demand; The storage unit is used to store the corresponding relationship between the media stream information and the media stream address; The query unit is used to query the storage unit according to the on-demand media stream information in the multimedia on-demand call request received by the receiving unit, and obtain the address of the media stream corresponding to the media stream information; The sending unit is configured to send a response message of the multimedia on demand call request to the application server, carrying the address of the media stream obtained by the query unit. 19. The system of multimedia on demand according to claim 18, wherein the multimedia terminal comprises: A sending unit, configured to send a call request for multimedia on demand to an application server; The receiving unit is configured to receive a response message of the multimedia on-demand call request forwarded by the application server, wherein the response message of the multimedia-on-demand call request carries an address corresponding to the on-demand media stream; The media stream obtaining unit is used for carrying the address corresponding to the media stream on demand in the response message of the call request received by the receiving unit, sending a request for obtaining the media stream on demand to the multimedia system, and obtaining the media on demand flow. 20. The system of multimedia on demand according to claim 19, is characterized in that, described multimedia terminal also comprises: The address obtaining unit is used to obtain the address of the multimedia system, and provide the obtained address of the multimedia system to the sending unit, and the sending unit sends a call request of multimedia on demand to the multimedia system according to the obtained address of the media system. 21. A multimedia terminal, characterized in that, comprising: A sending unit, configured to send a call request for multimedia on demand; The receiving unit is used to receive the returned response message of the call request of the multimedia on demand, and the response message of the call request of the multimedia on demand carries the address corresponding to the media stream on demand; The media stream acquisition unit is configured to acquire the on-demand media stream according to the address corresponding to the on-demand media stream received by the receiving unit. 22. The multimedia terminal according to claim 21, wherein the multimedia terminal further comprises: The address obtaining unit is used to obtain the address of the multimedia system, and provide the obtained address of the multimedia system to the sending unit, and the sending unit sends a multimedia point-and-play call request to the multimedia system according to the obtained address of the media system.

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