CN1741633A - System for realizing circuit field moving stream media requesting to broadcast and method thereof - Google Patents
System for realizing circuit field moving stream media requesting to broadcast and method thereof Download PDFInfo
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Abstract
A method for realizing movable stream media service of circuit domain includes combining H.324M multimedia calling of circuit exchange domain base on WCDMA with wideband IP stream media technique to control information stream between wideband IP network and video gateway VIG through RTSP or SIP transmission stream media and to realize format conversion between stream media and H . 324M stream through VIG for achieving interflow of circuit exchange domain H . 324M multimedia calling to stream media server to provide movable stream media service based on circuit exchange domain .
Description
Technical field
The present invention relates to the multimedia technology in the 3G (Third Generation) Moblie, particularly the streaming media on demand technology in the 3G (Third Generation) Moblie.
Background technology
Growing along with computer network, based on network multimedia transmission is more and more universal, and people increase day by day to the requirement of multimedia communication content, people no longer are satisfied with single, passive traditional media entertainment way, and real needs is personalized, interactive broadband streaming media amusement, particularly along with the further developing of mobile communication network technology, mobile multimedia has shown more and more that its future extensively and get over ripe user's cognition and acceptance.
Mobile multimedia is to provide colourful multimedia application service in mobile communication and stream field, broadband, and this is a mobile value-added service that provides on the basis of mobile communication.Mobile multi-media service has become one of important actuating force of 3G construction and development as an important service of 3G mobile radio communication.Mobile multimedia mainly comprises conversation class (client-client), video stream class (Client-Server) multimedia service.Wherein, third generation partner program (3rd Generation Partnership Proiect, abbreviation " 3GPP ") R99 version and later release have just defined based on the visual telephone service of circuit commutative field 3G-324M and the packet-switched domain streaming media service of packet-switched domain (Packet StreamingService is called for short " PSS ").At present, the application of mobile multimedia also is in initial stage, and various infrastructure are still waiting perfect, but from long term growth, along with the application of multiple portable terminal and the appearance of more business, the development prospect of mobile multimedia is limitless.
Stream media technology is a kind of multimedia application technology that grows up from the Internet.So-called stream media technology is that data transmit with continual stream mode to client from server end, just begins to play when first packet arrives.Stream media technology does not need to download multimedia file, so the user does not need to wait as long for.Corresponding with it traditional approach is multimedia file to be downloaded to user terminal could play afterwards.Streaming Media be one will communicate by letter, Internet etc. is fused to new technology together, can audio plays and content of multimedia such as video by streaming media service, also can carry out program request to it, has interactivity, for example based on the professional employing mobile flow medium video traffic that stream media technology realized of mobile video.The flexibility of mobile flow medium service, and characteristic such as the Streaming Media time-delay of start playing is very short make the user can watch uppick mobile video and audio frequency immediately.
At present, 3GPP has defined the stream of packets media business PSS based on internetworking agreement (Internet Protocol is called for short " IP ") and broadband technology.
3G-324M is the multimedia terminal standard of first suitable 3G of 3GPP formulation, and it is made up of video encoding with failure tolerance and H.324 mobile terminal extension standard.3G-324M is mainly used in the circuit switching domain video telephone in the business description of 3GPP.3G-324M realizes the real-time multimedia business and does not need IP network that Circuit Switching Network described here promptly is meant the circuit commutative field among the WCDMA in circuit commutative field.Provide Streaming Media to have that time delay is fixed, service quality (Quality of Service based on circuit switching, be called for short " QoS ") guaranteed, encoding and decoding (Codec) maturation, and need not IP/ User Datagram Protoco (UDP) (User Datagram Protocol, be called for short " UDP ")/advantages such as RTP (RealTime Transfer Protocol is called for short " RTP ") packet header expense.
At present, 3GPP has only defined the streaming media service based on packet-switched domain, promptly realizes transmission of flow media data by the WCDMA packet-switched domain.In the core net of WCDMA system, mainly contain circuit commutative field and packet-switched domain two parts are realized exchanges data.Wherein, circuit commutative field is handled traditional reciprocal exchange of business, and each communication need take some system resources and set up a special-purpose communication link, as speech business; Packet-switched domain then is responsible for handling packet switching service, does not need to set up dedicated link, and each grouped data all is responsible for route voluntarily.
Prior art is by GPRS serving GPRS support node (Serving GPRS Support Node in the WCDMA core net, abbreviation " SGSN ") handles the wireless access network of WCDMA and the wireless connections of mobile stream media terminal, and gateway GPRS supporting node (GGSN) (the GPRS Gateway Support Node by packet-switched domain in the core net, be called for short " GGSN ") realize mobile flow medium data and the exchange of external IP grouping of network, thus realize mobile flow medium service based on packet switching mechanism.Wherein, SGSN mainly is mobile management, safety management and the functions such as access control and Route Selection that realize in the packet switching process terminal, GGSN then is responsible for providing the interface of core net and external IP network, and described mobile stream media terminal promptly is meant the 3G mobile that can realize multimedia function in the WCDMA system.
In actual applications, there is following problem in such scheme: the PSS of prior art scheme is unfavorable for professional popularization, and the technology of QoS realizes more complicated.
Cause the main cause of this situation to be, existing technical scheme realizes based on the IP technology that adopts packet switching, carries out streaming media service operation more complicated by the PSS terminal, to having relatively high expectations of user, is unfavorable for professional popularization; And because IP technology itself does not provide QoS to guarantee, for the technical more complicated of the realization of the necessary QoS of mobile flow medium service.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of system and method thereof that realizes circuit field moving stream media requesting to broadcast, making can provide streaming media service by circuit domain in the 3G network, and stream media terminal is simple to operate, and QoS is easy to realize and can be fully guaranteed.
For achieving the above object, the invention provides a kind of system that realizes circuit field moving stream media requesting to broadcast, be applied in the 3G (Third Generation) Moblie, comprise: streaming media server, mobile services switching centre, video signal gateway and mobile stream media terminal;
Described streaming media server is connected by the internetworking protocol network with described video signal gateway; Described mobile services switching centre is connected by the universal mobile telecommunications system grounding wireless access network with described portable terminal;
Described streaming media server is used to provide program guide, according to the control information output information stream that receives;
Described video signal gateway is used for conversion and transmits described program guide and described control information, described information flow is changed to Media Stream, and sends to described mobile stream media terminal by described mobile services switching centre, and the call detail record of streaming media service is provided;
Described mobile stream media terminal is used to send selects the also control information of control flows media play, plays received described Media Stream.
Wherein, described video signal gateway can be integrated in the described mobile services switching centre, also can be independent of described mobile services switching centre.
Described Media Stream meets H.324M agreement;
Described mobile stream media terminal is dialed the mobile flow medium service access code and is initiated H.324M that multimedia call begins described circuit field moving stream media business, and the described control information that described mobile stream media terminal sends is dual-tone multifrequency or information H.245.
Described control information comprises: be used for carrying out the Play Control information that the mutual program of selecting of program is selected information alternately and is used to control playing programs according to described program guide.
Transmit described information flow and mutual described control information by real-time stream media protocol or conversation initialized protocol between described streaming media server and the described video signal gateway.
Described streaming media server also comprises: flow-medium performance acting server and streaming medium content server; Described flow-medium performance acting server is used to provide described program guide, and described streaming medium content server is used to provide described information flow.
The present invention also provides a kind of method that realizes circuit field moving stream media requesting to broadcast, is applied in the 3G (Third Generation) Moblie, comprises following steps:
The A mobile stream media terminal makes a call and selects program on the streaming media server in circuit domain;
The described streaming media server of B sends information flow to the video signal gateway;
The described video signal gateway of C sends to mobile stream media terminal by mobile services switching centre after described information flow is changed to Media Stream;
The described mobile stream media terminal of D is play described Media Stream.
Wherein, described Media Stream meets H.324M agreement;
Described steps A also comprises following substep:
A1 user uses described mobile stream media terminal to initiate H.324M multimedia call;
The access code of the whether described circuit domain streaming media service that the described mobile services switching centre of A2 judges that described user dials, enter steps A 3 if then start after video signal gateway and described streaming media server are set up the internetworking protocol channel, otherwise carry out common H.324M call treatment;
The described streaming media server of A3 sends program guide by described internetworking protocol channel to described video signal gateway;
The described video signal gateway of A4 sends described program guide by mobile services switching centre to described mobile stream media terminal, and described user selects the program of broadcast by described mobile stream media terminal.
In the described steps A 4, during program that described mobile stream media terminal is selected to play, use dual-tone multifrequency or information H.245.
Described method also comprises following steps:
After described step D finishes, the call detail record that described mobile services switching centre output is used to charge.
The user can also carry out alternately the broadcast of control flows medium among the described step D by described mobile stream media terminal and described streaming media server.
Described streaming media server comprises flow-medium performance acting server and streaming medium content server; When selecting program, described video signal gateway and described flow-medium performance acting server connect; After choosing program, described video signal gateway connects by described flow-medium performance acting server and described streaming medium content server.
Can find that by comparing technical scheme difference with the prior art of the present invention is that the present invention program is not based on the 3G packet domain, and be based on multi-media protocol (as H.324) the realization mobile flow medium service of 3G circuit domain.
Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly at first, (the Circuit Streaming Service of circuit commutative field streaming media service among the 3G, being called for short " CSS ") terminal is simple and easy to usefulness, reduced the use threshold of mobile flow medium service, particularly for some are unwilling to use the user that the complicated input of PSS selects, be very suitable, therefore can promote the popularization of 3G mobile flow medium service greatly; Secondly, because the QoS of circuit domain realization is simple, therefore can effectively guarantee the needed QoS of mobile flow medium, the technology that reduces QoS greatly realizes difficulty, and after future, 3G provided 128K to call out (MultiCall) more, the Streaming Media effect of circuit domain can be desirable more, and QoS is more guaranteed.
Description of drawings
Fig. 1 is a kind of system configuration schematic diagram of realizing the circuit commutative field mobile flow medium service in WCDMA according to an embodiment of the invention;
Fig. 2 is that a kind of circuit commutative field mobile stream media terminal of realizing in WCDMA according to an embodiment of the invention makes a call and selects the schematic flow sheet of program;
Fig. 3 is a kind of schematic flow sheet of realizing the circuit commutative field mobile flow medium service in WCDMA according to an embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Main thought of the present invention will combine with the stream media technology in Broadband IP technology field based on the multimedia call H.324M of 3G circuit domain, at broadband IP network and video signal gateway (VideoInterworking Gateway, abbreviation " VIG ") passes through real-time stream media protocol (Real-TimeStreaming Protocol between, be called for short " RTSP ") or session initiation protocol (Session Initiation Protocol, be called for short " SIP ") transport stream media control information stream, realize stream media information and the H.324M conversion between the information simultaneously, thereby realize the H.324M intercommunication of multimedia call and streaming media server of circuit domain, provide mobile flow medium service based on circuit domain to the user.The technical staff in field of the present invention can know, though this paper, also can adopt function and other similar multi-media protocols of agreement H.324M H.324M to be that example describes embodiments of the invention.
Fig. 1 shows a kind of system configuration that realizes the circuit commutative field mobile flow medium service among the WCDMA according to an embodiment of the invention.
As shown in the figure, the system of the circuit commutative field mobile flow medium service that the present invention program realized is by wireless access network 20 in mobile stream media terminal 10, the WCDMA system and (the Mobile Switching Center of the mobile services switching centre in the core net 30, be called for short " MSC ") 31 and internetworking agreement (Internet Protocol is called for short " IP ") network 40, streaming media server (Streaming Server) 50 formed.Wherein, streaming media server 50 is connected by IP network 40 with VIG32 or MSC31, and MSC31 is connected with mobile stream media terminal 10 by the wireless access network 20 in the WCDMA system, and mobile stream media terminal 10 communicates with wireless mode and wireless access network 20.Pass through real-time stream media protocol or SIP flow of transmitted information and mutual control information between streaming media server 50 and the VIG32.
The VIG32 of the circuit commutative field of core net 30 is used for conversion forwarding program guide and control information in the WCDMA system, information flow is changed to H.324M Media Stream, be implemented in the message transmission in the circuit commutative field, and MSC31 also provides the call detail record of streaming media service.Comprise VIG32 (VIG32 also can be independent of MSC31) among the MSC31, this VIG32 is used for realizing information flow is changed to H.324M Media Stream, thereby has realized transmission based on the circuit commutative field of streaming media service in WCDMA of the WCDMA of 3G324M by this MSC31 and VIG32.
Mobile stream media terminal 10 is used to send control information, selects the also broadcast of control flows medium, and plays received H.324M Media Stream.Mobile stream media terminal 10 is by dialing the mobile flow medium service access code initiating H.324M multimedia call, thus beginning circuit commutative field mobile flow medium service.Wherein, the control information that sends of mobile stream media terminal 10 is dual-tone multifrequency or information H.245.
Fig. 2 comes concrete a kind of mobile stream media terminal of realizing in the circuit commutative field of WCDMA according to an embodiment of the invention to make a call and select the idiographic flow of program.
As shown in Figure 2, at first in step 300, the user uses mobile stream media terminal 10 to initiate H.324M multimedia call, subsequently, enters step 310.
In step 310, whether what MSC31 judged that this user dials is the access code of circuit commutative field streaming media service.If what this user dialed is not the access code of circuit commutative field streaming media service, then in step 320 after this, carry out common H.324M call treatment; Otherwise, enter step 330.
In step 330, VIG32 and streaming media server 50 are set up IP tunnel, enter step 340;
In step 350, VIG32 sends program guide by MSC31 to mobile stream media terminal 10, and the user selects the program of broadcast by mobile stream media terminal 10.Need to prove that when selecting program, VIG32 and flow-medium performance acting server 51 connect, and after choosing program, VIG32 connects by flow-medium performance acting server 51 and streaming medium content server 52.So far, just in the circuit commutative field of WCDMA, realize making a call and selecting the process of program by mobile stream media terminal 10.
In order to further specify the present invention, specifically describe a kind of flow process that in the circuit commutative field of WCDMA, realizes mobile flow medium service according to an embodiment of the invention below with reference to Fig. 3.
At first, in step 400, mobile stream media terminal 10 makes a call and selects program on the streaming media server 50 at the circuit commutative field of WCDMA.What relate to here made a call and selected the detailed process of program described as the flow process among top Fig. 2 by mobile stream media terminal 10, at this simple and clear just repeated description no longer for article.Subsequently, enter step 410.
In step 410, VIG32 connects by flow-medium performance acting server 51 and streaming medium content server 52, and sends information flow by streaming media server 50 to VIG32, after this, enters step 420.
In step 420, H.324M MSC31 is changed to information flow by VIG32 and sends to mobile stream media terminal 10 behind the Media Stream, next, enters step 430.
In step 430, mobile stream media terminal 10 is play H.324M Media Stream, and here of particular note, the user can also carry out alternately the broadcast of control flows medium by mobile stream media terminal 10 and streaming media server 50.
At last, in step 440, after playing end, the call detail record that MSC31 output is used to charge.
It can be seen from the above, and the easy operation of the present invention program by mobile stream media terminal 10 can realize the mobile flow medium service based on the WCDMA circuit commutative field, and the whole implement process of communication system is succinct and effectively.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (12)
1. a system that realizes circuit field moving stream media requesting to broadcast is applied in the 3G (Third Generation) Moblie, it is characterized in that, comprises: streaming media server, mobile services switching centre, video signal gateway and mobile stream media terminal;
Described streaming media server is connected by the internetworking protocol network with described video signal gateway; Described mobile services switching centre is connected by the universal mobile telecommunications system grounding wireless access network with described portable terminal;
Described streaming media server is used to provide program guide, according to the control information output information stream that receives;
Described video signal gateway is used for conversion and transmits described program guide and described control information, described information flow is changed to Media Stream, and sends to described mobile stream media terminal by described mobile services switching centre, and the call detail record of streaming media service is provided;
Described mobile stream media terminal is used to send selects the also control information of control flows media play, plays received described Media Stream.
2. the system of realization circuit field moving stream media requesting to broadcast according to claim 1 is characterized in that, described video signal gateway can be integrated in the described mobile services switching centre, also can be independent of described mobile services switching centre.
3. the system of realization circuit field moving stream media requesting to broadcast according to claim 1 is characterized in that, described Media Stream meets H.324M agreement;
Described mobile stream media terminal is dialed the mobile flow medium service access code and is initiated H.324M that multimedia call begins described circuit field moving stream media business, and the described control information that described mobile stream media terminal sends is dual-tone multifrequency or information H.245.
4. the system of realization circuit field moving stream media requesting to broadcast according to claim 1, it is characterized in that described control information comprises: be used for carrying out the Play Control information that the mutual program of selecting of program is selected information alternately and is used to control playing programs according to described program guide.
5. the system of realization circuit field moving stream media requesting to broadcast according to claim 1, it is characterized in that, transmit described information flow and mutual described control information by real-time stream media protocol or conversation initialized protocol between described streaming media server and the described video signal gateway.
6. the system of realization circuit field moving stream media requesting to broadcast according to claim 1 is characterized in that, described streaming media server also comprises: flow-medium performance acting server and streaming medium content server; Described flow-medium performance acting server is used to provide described program guide, and described streaming medium content server is used to provide described information flow.
7. a method that realizes circuit field moving stream media requesting to broadcast is applied in the 3G (Third Generation) Moblie, it is characterized in that, comprises following steps:
The A mobile stream media terminal makes a call and selects program on the streaming media server in circuit domain;
The described streaming media server of B sends information flow to the video signal gateway;
The described video signal gateway of C sends to mobile stream media terminal by mobile services switching centre after described information flow is changed to Media Stream;
The described mobile stream media terminal of D is play described Media Stream.
8. the method for realization circuit field moving stream media requesting to broadcast according to claim 7 is characterized in that, described Media Stream meets H.324M agreement;
Described steps A also comprises following substep:
A1 user uses described mobile stream media terminal to initiate H.324M multimedia call;
Whether what the described mobile services switching centre of A2 judged that described user dials is the access code of described circuit domain streaming media service, enter steps A 3 if then start after video signal gateway and described streaming media server are set up the internetworking protocol channel, otherwise carry out common H.324M call treatment;
The described streaming media server of A3 sends program guide by described internetworking protocol channel to described video signal gateway;
The described video signal gateway of A4 sends described program guide by mobile services switching centre to described mobile stream media terminal, and described user selects the program of broadcast by described mobile stream media terminal.
9. the method for realization circuit field moving stream media requesting to broadcast according to claim 8 is characterized in that, in the described steps A 4, during program that described mobile stream media terminal is selected to play, uses dual-tone multifrequency or information H.245.
10. the method for realization circuit field moving stream media requesting to broadcast according to claim 7 is characterized in that, described method also comprises following steps:
After described step D finishes, the call detail record that described mobile services switching centre output is used to charge.
11. the method for realization circuit field moving stream media requesting to broadcast according to claim 7 is characterized in that, the user can also carry out alternately the broadcast of control flows medium among the described step D by described mobile stream media terminal and described streaming media server.
12. the method for realization circuit field moving stream media requesting to broadcast according to claim 7 is characterized in that, described streaming media server comprises flow-medium performance acting server and streaming medium content server; When selecting program, described video signal gateway and described flow-medium performance acting server connect; After choosing program, described video signal gateway connects by described flow-medium performance acting server and described streaming medium content server.
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| CNB2004100750964A CN1326414C (en) | 2004-08-27 | 2004-08-27 | System for realizing circuit field moving stream media requesting to broadcast and method thereof |
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