CN101018318A - A stream media system, signaling forward device and stream media transmission method - Google Patents
A stream media system, signaling forward device and stream media transmission method Download PDFInfo
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Abstract
The disclosed flow media system comprises: a signaling transmission system, including an authorization unit to report request to following system and receive result to send to a media server, and a transmission unit for transmit signaling flow; a business support system, including an authorization unit to authorize the terminal and send result to last device; and a media server to transmit media flow to terminal after authorizing successfully;. This intention transmits signaling flow and data flow separately to make the media server focus on its self function.
Description
Technical field
The present invention relates to the Streaming Media field, particularly a kind of stream media system, signaling forward device and transmission method of stream media.
Background technology
Present IPTV (IPTV, Internet Protocol TV or Interactive Personal TV Web TV also claims IPTV), CDN (Content Distribution Network content distributing network) and mobile flow medium field, the on-demand media file provides service by media server to terminal by the mode of clean culture.Signaling flow and data flow are directly mutual at media server and terminal room, and all signaling messages are managed separately by each media server, and carry out reporting of charging message.
In stream media system, the Signalling exchange that uses RTSP agreement (Real Time StreamingProtocol, real-time streaming protocol) to ask or respond between terminal and media server based on Transmission Control Protocol (Transfer Control Protocol transmission control protocol).Once complete RTSP is made up of request and response alternately, and RTSP request message commonly used has: description (DESCRIBE), operation (OPTIONS), transmission channel are set up (SETUP), are play (PLAY), disconnection (TEARDOWN) etc.Media server generally can use RTP (Realtime Transform Protocol RTP) sends Media Stream based on the UDP/TCP agreement to terminal, the terminal receiving media stream and the broadcast of decoding under the normal flow.
(dotted line represents that signaling flow is mutual among the figure, and solid line represents that data flow is mutual) as shown in Figure 1, handling process was as follows when existing media server provided media services to terminal:
Step 101～step 102. terminal is initiated TCP and is connected the request of foundation, terminal with set up TCP after media server is consulted through TCP and be connected, this TCP passage is used for the RTSP protocol message to be transmitted;
Step 103～step 104. terminal is initiated operation (OPTIONS) request, is used for the query media servers ability, as supports which pattern (TRICK MODE), and media server returns to terminal with self-ability by operation (OPTIONS) response message;
Step 105～step 108. terminal initiates to describe (DESCRIBE) request, the media file of request institute program request or the detailed description of direct broadcast band, server is by describing (DESCRIBE) request responding message return results, video encoding form as medium, sample rate, transport stream encapsulation format etc., in this process, media server need report authentication message and initial charging message to business support system, wherein authentication message and initial charging message generally are reported to business support system together, can be chosen in and receive that in the process of whole program request, media server need report authentication to business support system, charging message.Wherein authentication message and initial charging message generally are reported to business support system together for the first time, can be chosen in when receiving description (DESCRIBE) request message and report, whether the return messages decision of whether passing through according to the authentication of business support system provides service to terminal, and authentication is by then providing service to terminal;
Step 109～step 112. is under unicast case, terminal is initiated transmission channel and is set up (SETUP) request, requirement and media server are set up and are looked the audio frequency interface channel, and carry IP, the port (Port) that requires server to send in agreement, and media server returns success response message.When adopting Real-time Transport Protocol (RealtimeTransform Protocol, RTP) as transport stream, need to send twice transmission channel and set up (SETUP) request, be respectively applied for the transmission channel of setting up video and audio frequency;
Step 113～step 115. is after correctly having set up audio channel and video channel, and terminal initiates to play (PLAY) request, to media server request media data; After media server responds this message, begin to adopt the mode of clean culture to transmit data to terminal by audio channel and video channel;
Step 116～step 123. is in playing process, terminal can be by carrying pattern (TRICK MODE) information at broadcast (PLAY) request message, media server is according to demanding terminal, can send data messages such as F.F., rewind down, location, in playing process, be media server by mode of unicast in the process of terminal output media stream, media server can report Intermediate Charging ICH message to business support system by every interval some cycles, provides the real-time deduction function for business support system;
When step 116～step 123 needs to finish this time to play, terminal sends disconnection (TEARDOWN) message to media server, stop to send medium after media server returns success and flow to terminal, play and finish, when playing end, media server reports to charge to business support system and stops message, finishes deducting fees of this user.
We can see that signaling flow is directly mutual by terminal and media server the handling process when above media server provides media services to terminal, and Signalling exchange disperses, can't accomplish unified management, information such as current state, broadcast success rate can't be gathered in real time;
Media server also needs additionally to report charging message to business support system simultaneously, has influenced the performance of media server;
In addition because all signaling control messages are direct and media apparatus interaction, therefore media server docks with different terminals if desired, need adaptive different signaling control protocols, cause media server when realization and multiple terminals butt joint, need carry out complex modifications;
And by above-mentioned flow process as can be known, each media server carries out not having association between the different media servers alternately with terminal alone, carries out load balancing between the different media servers so can't be implemented in.
Summary of the invention
In view of this, a kind of stream media system is provided on the one hand, comprise: signaling forward device, comprise authenticating unit be used for to the business support system reporting terminal authentication request, receive the authenticating result of the described terminal that business support system issues, described authenticating result is sent to media server, retransmission unit is used to and transmits interactive signaling stream between terminal and the media server; Business support system comprises that authenticating unit is used for described terminal is carried out authentication, issues authenticating result to described terminal to signaling forward device; Media server is used at business support system described terminal authentication being sent Media Stream by the back to described terminal.
A kind of signaling forward device is provided on the other hand, has comprised: authenticating unit, be used for to the business support system reporting terminal authentication request, receive the authenticating result of the described terminal that business support system issues, described authenticating result is sent to media server; Retransmission unit is used to and transmits interactive signaling stream between terminal and the media server.
Provide a kind of transmission method of stream media on the one hand again, may further comprise the steps:
Flow for transmitting interactive signaling between terminal and the media server, and the described terminal of requested service support system authentication;
Receive the authenticating result of described business support system, and described authenticating result is sent to media server described terminal;
Described media server sends Media Stream by the back to described terminal at described terminal authentication.
The embodiment of the invention provides the separately scheme of transmission of a kind of signaling flow and data flow, by the signalling path command transmitting of a terminal to signaling forward device to media server, media server sends Media Stream by the data channel with terminal room, direct and terminal is carried out alternately, by separating of signaling flow and data flow, make media server be absorbed in the function of itself.
Description of drawings
Fig. 1 provides the process chart of media services to terminal for media server in the prior art;
A kind of stream media system that Fig. 2 provides for the embodiment of the invention one;
A kind of stream media system that Fig. 3 provides for the embodiment of the invention two;
A kind of signaling forward device that Fig. 4 provides for the embodiment of the invention three;
A kind of signaling forward device that Fig. 5 provides for the embodiment of the invention four;
A kind of media server that Fig. 6 provides for the embodiment of the invention five provides the process chart of media services to terminal;
Switching flow schematic diagram between the different media servers that Fig. 7 provides for the embodiment of the invention six.
Embodiment
The embodiment of the invention one provides a kind of stream media system, referring to accompanying drawing 2, stream media system comprises terminal 201, signaling forward device 202, media server 203, business support system 204, wherein terminal 201 sends the medium signaling flow to signaling forward device 202, signaling forward device 202 is to the authentication request of business support system 204 reporting terminals and receive the authenticating result to terminal 201 that business support system 204 issues, the signaling flow that receiving terminal 201 sends, authenticating result and signaling flow that the business support system of receiving 204 is reported send to media server 203,204 pairs of terminals of business support system 201 are carried out authentication, issue the authenticating result to terminal 201; Whether media server 203 sends Media Stream to described terminal 201 according to receiving the decision of described authenticating result and signaling flow.
The embodiment of the invention two provides a kind of stream media system, referring to accompanying drawing 3, stream media system comprises terminal 301, signaling forward device 302, media server 303 (comprises media server A 3031, media server B3032, media server C3033), business support system 304, gateway system 305, wherein terminal 301 sends the medium signaling flow to signaling forward device 302, signaling forward device 302 is to the authentication request of business support system 304 reporting terminals 301 and receive the authenticating result to terminal 301 that business support system 304 issues, 304 pairs of terminals of business support system 301 are carried out authentication, issue authenticating result to terminal 201, the signaling flow that authenticating result that signaling forward device 302 reports the business support system of receiving 304 and the terminal that receives 301 send sends to media server 303, whether media server 303 sends Media Streams to described terminal 301 according to authenticating result that receives and signaling flow decision, when the authenticating result that receives be authentication by and send Media Streams to terminal 301 when receiving the signaling flow of playing request.
Signaling forward device 302 is transmitting signaling when stream first, set up certain media server in terminal 301 and the media server 303 such as the mapping relations between the media server A3031, when receiving later the signaling flow of terminal 301 transmissions again, directly this signaling is forwarded to the media server A3031 that has set up mapping relations with this terminal 301.
If signaling forward device 302 has been managed three media servers: media server A 3031, media server B3032 and media server C3033, then when terminal 301 transmission signalings flow to signaling forward device 302, signaling forward device 302 can select one service to be provided for terminal 301 in three media servers being managed, the strategy of selecting can be based on CPU, internal memory, disk read-write speed (magnetic disc i/o), number of users, bandwidth, the application software running status, information such as media content distribution, this class selection strategy can decide its priority by User Defined, in general media server running status, the application software running status is primary condition, under the situation of media server operation, signaling forward device uses CPU, internal memory, magnetic disc i/o even load parameter is calculated the loading condition of each media server according to the mode of weighted sum, and presses load by light mode selection scheduling to weight; Consider the user experience priority principle, also can dispatch, select to have the media server of media content earlier, preferentially guarantee user experience according to the media content distribution situation, under the situation of distribution of content, dispatch according to loading condition again at many media servers.
Each media server 303 needs to keep normal heartbeat with signaling forward device 302 and is connected, so that signaling forward device detects the loading condition of each media server in real time, when certain the media server A3031 load that Media Stream is being provided is overweight, signaling forward device can provide service for terminal 301 according to media server such as the media server A3031 that the selection strategy of formulating is reselected other, promptly send disconnection message to media server A3031, send connection message to media server B3032, simultaneously the mapping relations between terminal 301 and the media server A3031 are updated to the mapping relations between terminal 302 and the media server B3032.
Signaling forward device 302 can also directly report the charging message of each terminal 301 to business support system 304, charging message is for beginning charging message, Intermediate Charging ICH message or stop charging message, all charging messages have been saved the performance of media server 303 by signaling forward device 302 unified managements.
Because all signaling messages are all transmitted by signaling forward device 302 alternately, therefore terminal 301 linking numbers have been preserved on the signaling forward device 302, every media server 303 linking numbers are (as live, program request etc.), the pattern of every media server 303 (Trick Mode) state, the performance datas such as loading condition of every media server 303, therefore this type of performance data all can be reported to network management system 305 by signaling forward device 303, and do not need media server 303 and network management system 305 to dock, saved the performance of media server 303 greatly, made it can be absorbed in the key property of media services.
Because the agreement that the signaling message of different terminals adopts may be distinguished to some extent, signaling forward device can be used as SGW, signaling protocol such as Session Initiation Protocol that terminal is initiated are converted to signaling protocol such as the RTSP agreement that media server can receive, like this when supporting different terminals, signaling forward device can carry out protocol conversion, and does not need media server to revise to support different terminals.
The embodiment of the invention three provides a kind of signaling forward device, referring to accompanying drawing 4, comprise that authenticating unit 403 is to the authentication request of business support system reporting terminal with receive the authenticating result of the described terminal that business support system issues, the signaling flow that receiving element 401 receiving terminals send, transmitting element 402 sends to media server with authenticating result and signaling flow.
The embodiment of the invention four provides a kind of signaling forward device, referring to accompanying drawing 5, comprise that authenticating unit 505 is to the authentication request of business support system reporting terminal with receive the authenticating result of the described terminal that business support system issues, the signaling flow that receiving element 501 receiving terminals send, transmitting element 503 sends to media server with authenticating result and signaling flow.
Signaling forward device comprises mapping relations unit 507, when signaling forward device transmitting signaling when stream first, set up the mapping relations between terminal and the media server, when after this receiving the signaling flow of this terminal transmission again, directly this signaling is forwarded to the media server of having set up mapping relations with this terminal.
When if signaling forward device receives the signaling flow of terminal transmission, this signaling flow can be transmitted in a plurality of media servers, signaling forward device comprises the selection strategy of policy unit 506 setting selection media servers, the strategy of selecting can be based on CPU, internal memory, magnetic disc i/o, number of users, bandwidth, the application software running status, information such as media content distribution, this class selection strategy can decide its priority by User Defined, in general media server running status, the application software running status is primary condition, under the situation of media server operation, signaling forward device uses CPU, internal memory, magnetic disc i/o even load parameter is calculated the loading condition of each media server according to the mode of weighted sum, and presses load by light mode selection scheduling to weight; Consider the user experience priority principle, also can dispatch, select to have the media server of media content earlier, preferentially guarantee user experience according to the media content distribution situation, under the situation of distribution of content, dispatch according to loading condition again at many media servers.
Signaling forward device comprises detecting unit 508, each media server needs to keep normal heartbeat with signaling forward device and is connected, so that the detecting unit in the signaling forward device detects the fault and/or the load state of each media server in real time, when certain the media server load that Media Stream is being provided is overweight, signaling forward device can provide service to terminal according to the media server that the selection strategy of formulating is reselected other, promptly send disconnection message to the overweight media server of load, send connection message and simultaneously the mapping relations between terminal and the media server are upgraded to the media server of reselecting.
Signaling forward device comprises performance data unit 509, because all signaling messages are all transmitted by signaling forward device alternately, therefore preserved the terminal linking number on the signaling forward device, every media server linking number is (as live, program request etc.), the pattern of every media server (Trick Mode) state, performance datas such as the loading condition of every media server, therefore this type of performance data all can be reported to network management system by the performance data unit in the signaling forward device, and do not need media server and network management system to dock, saved the performance of media server greatly, made it can be absorbed in the key property of media services.
Signaling forward device comprises Charging Detail Record unit 504, reports charging message to each terminal, charging message to comprise the beginning charging message and stops charging message to business support system, also may comprise Intermediate Charging ICH message.All charging messages are by 504 unified managements of the Charging Detail Record unit in the signaling forward device, so the performance of having saved media server.
Signaling forward device comprises signaling protocol conversion unit 502, because the agreement that the signaling message of different terminals adopts may be distinguished to some extent, signaling protocol such as Session Initiation Protocol that signaling protocol conversion unit 502 in the signaling forward device is initiated terminal are converted to signaling protocol such as the RTSP agreement that media server can receive, like this when supporting different terminals, signaling forward device can carry out protocol conversion, and do not need media server to revise to support different terminals, the performance of having saved media server.
The embodiment of the invention five provides a kind of media server to provide the handling process of media services to terminal, referring to accompanying drawing 6 (dotted line represents that signaling flow is mutual among the figure, and solid line represents that data flow is mutual):
Step 601～step 605. is initiated TCP by terminal and is connected the request of foundation, after signaling forward device is received the TCP connection request, initiate TCP to media server and connect the request of foundation, media server sends the TCP connection response to signaling forward device, signaling forward device is when receiving the TCP connection response that media server sends, set up TCP with media server and be connected, and send the TCP connection response message, also set up TCP simultaneously and be connected with terminal to terminal.In this process, signaling forward device selects media server to set up the TCP connection, the strategy of signaling forward device selection media server can be self-defined, includes but not limited to CPU, internal memory, number of users, bandwidth, application software running status, media content distribution.Connection for each terminal, media server, signaling forward device is set up mapping relations in inside when first signaling being transmitted to media server, follow-up receive the signaling request of this terminal after, signaling forward device can be directly be forwarded to the signaling request on the corresponding media server according to mapping relations, and according to these mapping relations the response message of media server is transmitted to terminal.Terminal includes but not limited to mobile phone, PC (Personal Computer PC), PDA (Personal Digital Assistant personal digital assistant), set-top box;
Step 606～step 609. terminal is initiated operation (OPTIONS) request, be used for the query media servers ability, as support which pattern (TRICK MODE), after signaling forward device is received request, be transmitted to media server, media server returns to signaling forward device with self-ability by operation (OPTIONS) response message, and signaling forward device is transmitted to terminal with this response message again;
Step 610～step 614. terminal initiates to describe (DESCRIBE) request, the media file of request institute program request or the detailed description of direct broadcast band, signaling forward device is given media server with this forwards, media server is by describing (DESCRIBE) request responding message return results, as the video encoding form of medium, sample rate, transport stream encapsulation format etc., if transmit by the multicast mode, also need to return the IP information of multicast, be transmitted to terminal after signaling forward device is received again;
Step 615～step 622. is under unicast case, terminal is initiated transmission channel and is set up (SETUP) request, requirement and server are set up and are looked the audio frequency interface channel, and in agreement, carry the IP address that requires server to send, port (Port), signaling forward device is transmitted to media server with this information, the success response message that media server returns is transmitted to terminal through signaling forward device, when adopting Real-time Transport Protocol as transport stream, need to send twice transmission channel and set up (SETUP) request, be respectively applied for the transmission channel of setting up video and audio frequency, because terminal is set up in (SETUP) message in transmission channel and has been write down purpose (destination) IP address, this IP address is an IP address of terminal, signaling forward device is when the notice media server, do not revise this address, then extended meeting directly sends Media Stream to terminal behind the media server, rather than sends medium and flow to signaling forward device, and step 615～step 622 can be expressed as follows:
SETUP?rtsp://example.com/foo/bar/baz.mpg?RTSP/1.0
CSeq:3
Transport:MP2T/[RTP]/TCP|UDP；unicast；destination＝172.18.79.120；client_port＝4588-4589
[Range:npt＝now-end]
[Accept:application/sdp]
[x-Properties:mac_address＝0050BFFB9FA1]
Destination=172.18.79.120 in the said process is the IP address of terminal, and media server finally can send Media Stream to terminal according to this address
Step 623～step 633. is after correctly having set up audio channel and video channel, terminal initiates to play (PLAY) request, to media server request media data, signaling forward device is transmitted this message to media server, media server responds this message, begins to adopt the mode of clean culture to transmit data to terminal by audio channel and video channel;
In playing process, terminal can be forwarded to media server through signaling forward device by carry pattern (TRICKMODE) information in playing (PLAY) message, and media server can send data messages such as F.F., rewind down, location according to demanding terminal;
When step 634～step 637. needs to finish this time to play, terminal sends disconnection (TEARDOWN) request message signaling forward device, signaling forward device is transmitted to media server, stops to send medium after media server returns success and flows to terminal, plays and finishes;
In the process of whole program request, because all signaling control messages are all passed through signaling forward device and are transmitted, therefore all charging messages can report business support system by signaling forward device, authentication message and initial charging message generally are reported to business support system together for the first time, can be chosen in content description (DESCRIBE) process and report, whether the authentication return messages decision by business support system provides service to terminal, as step 611;
In playing process, signaling forward device connects each, all can report Intermediate Charging ICH message to business support system by every interval some cycles, provides the real-time deduction function for business support system, as step 628;
When playing end, after signaling forward device is received disconnection (TEARDOWN) message, can report to charge to business support system to stop message, finish deducting fees of this user.
For the RTSP agreement, this mode be applicable between media server and the terminal adopt TCP directly to connect or User Datagram Protoco (UDP) (User Datagram Protocol, UDP) mode sends media data.
Each media server is held normal heartbeat with signaling forward device and is connected, so that signaling forward device detects the loading condition of each media server in real time, when detecting certain the media server load that Media Stream is being provided when overweight, signaling forward device can provide service to terminal according to the media server that the selection strategy of formulating is reselected other, simultaneously the mapping relations between terminal and the media server is upgraded.
By above-mentioned handling process as can be known, all signaling messages are all transmitted by signaling forward device alternately, therefore preserved the terminal linking number on the signaling forward device, every media server linking number is (as live, program request etc.), the pattern of every media server (Trick Mode) state, performance datas such as the loading condition of every media server, therefore this type of performance data all can be reported to network management system by signaling forward device, and do not need media server and network management system to dock, saved the performance of media server greatly, made it can be absorbed in the key property of media services.
Because the agreement that the signaling message of different terminals adopts may be distinguished to some extent, signaling forward device can be used as SGW, signaling protocol such as Session Initiation Protocol that terminal is initiated are converted to signaling protocol such as the RTSP agreement that media server can receive, like this when supporting different terminals, signaling forward device can carry out protocol conversion, and does not need media server to revise to support different terminals.
The embodiment of the invention six has provided the switching flow schematic diagram between the different media servers, referring to accompanying drawing 7:
Step 701. media server A provide media services to terminal, issues the terminal media data flow;
Step 702～step 703. signaling forward device detects the running status of each media server, and media server A returns load and surpasses the message that limits;
The signaling that step 704. signaling forward device disconnects between itself and the media server A connects;
The signaling that step 705. signaling forward device is set up between itself and the media server B connects;
Step 706. signaling forward device is updated to mapping relations between terminal and the media server B with the mapping relations between terminal and the media server A;
Step 707. signaling forward device notice media server B sends the IP address and the port (Port) of Media Stream;
Step 708. media server B sends media data flow to terminal.
Above-mentioned handoff procedure is shorter, so the data cached of terminal can be supported this switching time.
It is a kind of between terminal and media server that the stream media system that the foregoing description provides, signaling forward device and transmission method of stream media all provide, and signaling flow and data flow be the scheme of transmission separately.Signaling flow is by unified signaling forward device and Ge Tai media apparatus interaction, signaling forward device is selected one in each media server of being managed dispatches, this moment, the load balancing choice criteria can customize according to business need, as information such as CPU, internal memory, number of users, bandwidth, application software running status, media content distributions.Signaling forward device is transmitted to media server with signaling flow, and the message that media server is responded is transmitted to terminal again, keep the signalling path of a terminal with this to signaling forward device to media server, media server sends Media Stream by the data channel with terminal room, direct and terminal is carried out alternately, by separating of signaling flow and data flow, signaling forward device has been realized special signaling unified management, all miscellaneous functions such as charging report, performance data is collected, the conversion of signaling protocol, scheduling between the different media servers etc. is all finished by signaling forward device, and media server is absorbed in the function of itself.
In IPTV field, CDN field, mobile field or in other association areas, the stream media system that the foregoing description provides, signaling forward device and transmission method of stream media can be applied, the terminal signaling control protocol and the flow host-host protocol of every field are distinguished to some extent, as the terminal of IPTV field, adopt the RTSP agreement to connect, but might use the standard of RTSP or MPEG2 TS to carry out flow transmission; The CDN field might adopt agreement such as MMS to carry out signaling control, adopts the privately owned flow host-host protocol of Microsoft or RealNetworks company to carry out flow transmission; Mobile field adopts RTSP to carry out signaling control, adopts Real-time Transport Protocol to carry out flow transmission; SIP, control, host-host protocol such as protocol suite H.323 may be adopted in some field in addition, but which kind of agreement no matter, signaling forward device can be applied between terminal and the media server, realizes the forwarding and the control of signaling message.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (23)
1. a stream media system is characterized in that, comprising:
Signaling forward device, comprise authenticating unit be used for to the business support system reporting terminal authentication request, receive the authenticating result of the described terminal that business support system issues, described authenticating result is sent to media server, retransmission unit is used to and transmits interactive signaling stream between terminal and the media server;
Business support system comprises that authenticating unit is used for described terminal is carried out authentication, issues authenticating result to described terminal to signaling forward device;
Media server is used at business support system described terminal authentication being sent Media Stream by the back to described terminal.
2. stream media system as claimed in claim 1, it is characterized in that, described signaling forward device also comprises: policy unit, be used to be set at the selection strategy that terminal is selected media server, select media server according to described selection strategy, described retransmission unit is transmitted to described signaling flow the media server of described selection.
3. stream media system as claimed in claim 2, it is characterized in that described selection strategy is according to one or more formulation of following parameter: the number of users that is connected on CPU usage, memory usage, the media server, bandwidth, application software running status or media content distribution.
4. stream media system as claimed in claim 3 is characterized in that, described signaling forward device also comprises: the mapping relations unit, set up the mapping relations between terminal and the media server when being used for transmitting first described signaling flow;
Described retransmission unit is transmitted interactive signaling stream between described terminal and the media server according to described mapping relations.
5. stream media system as claimed in claim 4, it is characterized in that, described signaling forward device also comprises: detecting unit, be used to detect the fault and/or the load state of each media server, described policy unit is selected media server for terminal again according to described testing result and described selection strategy, and the mapping relations that described map unit is upgraded described terminal and described media server are the mapping relations of described terminal and the media server of reselecting.
6. stream media system according to claim 1, it is characterized in that, described signaling forward device also comprises: Charging Detail Record unit, be used for the charging message to described terminal is sent to described business support system, and described business support system charges to described terminal according to described charging message.
7. stream media system according to claim 1, it is characterized in that described signaling forward device also comprises: the performance data unit is used for according to transmitting interactive signaling stream between terminal and the media server, collect the performance data of described each media server, report network management system.
8. stream media system according to claim 1, it is characterized in that, described signaling forward device also comprises: the signaling protocol conversion unit, be used for the signaling protocol that described terminal sends is converted into the signaling protocol that described streaming media server can receive, the signaling protocol that described streaming media server is sent is converted into the signaling protocol that described terminal can receive.
9. a signaling forward device is characterized in that, comprising:
Authenticating unit, be used for to the business support system reporting terminal authentication request, receive the authenticating result of the described terminal that business support system issues, described authenticating result is sent to media server;
Retransmission unit is used to and transmits interactive signaling stream between terminal and the media server.
10. signaling forward device as claimed in claim 9, it is characterized in that, described signaling forward device also comprises: policy unit, be used to be set at the selection strategy that terminal is selected media server, select media server according to described selection strategy, described retransmission unit is transmitted to described signaling flow the media server of described selection.
11. signaling forward device as claimed in claim 10, it is characterized in that described selection strategy is according to one or more formulation of following parameter: the number of users that is connected on CPU usage, memory usage, the media server, bandwidth, application software running status or media content distribution.
12. signaling forward device as claimed in claim 11, it is characterized in that, described signaling forward device also comprises: described signaling forward device also comprises: the mapping relations unit, set up the mapping relations between terminal and the media server when being used for transmitting first described signaling flow;
Described retransmission unit is transmitted interactive signaling stream between described terminal and the media server according to described mapping relations.
13. signaling forward device as claimed in claim 9, it is characterized in that, described signaling forward device also comprises: Charging Detail Record unit, be used for the charging message to described terminal is sent to described business support system, and described business support system charges to described terminal according to described charging message.
14. signaling forward device as claimed in claim 9, it is characterized in that described signaling forward device also comprises: the performance data unit is used for according to transmitting interactive signaling stream between terminal and the media server, collect the performance data of described each media server, report network management system.
15. signaling forward device as claimed in claim 9, it is characterized in that, described signaling forward device also comprises: the signaling protocol conversion unit, be used for the signaling protocol that described terminal sends is converted into the signaling protocol that described streaming media server can receive, the signaling protocol that described streaming media server is sent is converted into the signaling protocol that described terminal can receive.
16. a transmission method of stream media is characterized in that, may further comprise the steps:
Flow for transmitting interactive signaling between terminal and the media server, and the described terminal of requested service support system authentication;
Receive the authenticating result of described business support system, and described authenticating result is sent to media server described terminal;
Described media server sends Media Stream by the back to described terminal at described terminal authentication.
17. method as claimed in claim 16 is characterized in that, described method also comprises: be set at the selection strategy that terminal is selected media server, select media server according to described selection strategy, described signaling flow is transmitted to the media server of described selection.
18. method as claimed in claim 17, it is characterized in that described setting selection strategy comprises: set described selection strategy according to one or more of following parameter: the number of users that is connected on CPU usage, memory usage, the media server, bandwidth, application software running status or media content distribution.
19. method as claimed in claim 17, it is characterized in that, described method also comprises: set up the mapping relations between terminal and the media server when transmitting described signaling flow first, transmit interactive signaling stream between described terminal and the media server according to described mapping relations.
20. method as claimed in claim 19 is characterized in that, described method also comprises:
Detect described media server fault or load and surpass the setting volume, select media server for terminal again according to described selection strategy, the signaling flow that described terminal is sent is transmitted to the described media server of reselecting;
The mapping relations of described terminal and described media server are updated to the mapping relations of described terminal and the media server of reselecting.
21 methods as claimed in claim 16 is characterized in that, described method also comprises: will send to business support system to the charging message of described terminal, business support system charges to described terminal according to described charging message.
22. method as claimed in claim 16 is characterized in that, described method also comprises: according to transmitting interactive signaling stream between terminal and the media server, collect the performance data of described each media server, report network management system.
23. method as claimed in claim 16, it is characterized in that, described method also comprises: the signaling protocol that described terminal is sent is converted into the signaling protocol that described streaming media server can receive, and the signaling protocol that described streaming media server is sent is converted into the signaling protocol that described terminal can receive.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710073386 CN101018318A (en) | 2007-02-25 | 2007-02-25 | A stream media system, signaling forward device and stream media transmission method |
| CN2007101277539A CN101123527B (en) | 2007-02-25 | 2007-06-26 | A stream media system, signaling forward device and stream media transmission method |
| EP07123690A EP1962507A1 (en) | 2007-02-25 | 2007-12-19 | Method for sending stream media, signaling forwarding device and stream media system |
| US12/004,043 US20080209065A1 (en) | 2007-02-25 | 2007-12-20 | Method for sending stream media, signaling forwarding device and stream media system |
| PCT/CN2008/070328 WO2008101444A1 (en) | 2007-02-25 | 2008-02-19 | A streaming media system, signaling transmitting device and sending method of streaming media |
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| CN 200710073386 CN101018318A (en) | 2007-02-25 | 2007-02-25 | A stream media system, signaling forward device and stream media transmission method |
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| CN 200710073386 Pending CN101018318A (en) | 2007-02-25 | 2007-02-25 | A stream media system, signaling forward device and stream media transmission method |
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