CN102480418A - Routing method for realizing video frequency intercommunication for code division multiple access (CDMA) 2000 terminal and soft exchange terminal - Google Patents
Routing method for realizing video frequency intercommunication for code division multiple access (CDMA) 2000 terminal and soft exchange terminal Download PDFInfo
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- CN102480418A CN102480418A CN2010105632635A CN201010563263A CN102480418A CN 102480418 A CN102480418 A CN 102480418A CN 2010105632635 A CN2010105632635 A CN 2010105632635A CN 201010563263 A CN201010563263 A CN 201010563263A CN 102480418 A CN102480418 A CN 102480418A
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Abstract
The invention provides a routing method for realizing video frequency intercommunication for a code division multiple access (CDMA) 2000 terminal and a soft exchange terminal. Voice call and video call are separately routed by adding a judgment mechanism for a calling media attribute by media gateway control function (MGCF) and soft exchange. The routing operation of the video frequency intercommunication of the CDMA 2000 terminal and the soft exchange terminal is realized.
Description
Technical field
The present invention relates to CDMA and soft switch applied technical field, relate in particular to the method for routing of realizing CDMA2000 terminal and soft switch terminal video interconnection.
Background technology
From based on Circuit-switched legacy network to flexible exchanging network based on packet switching, telecommunication service is also progressively developed to visual telephone by single voice call.Arrive the arriving in 3G/IMS epoch again, Video Applications becomes the professional basis of colourful 3G especially, and each runs the commercial city in the research and development of actively developing based on Video Applications.
Because numbering is mixed with the 2G terminal in the 3G/IMS terminal, in network, causes addressing and routing issue.For example, CDMA2000 handset be a 3G terminal be again a 2G terminal, promptly can insert 3G network and 2G network simultaneously, its audio call is accomplished in the 2G network, video call is accomplished in the 3G/IMS network.But no matter be audio call or video call, mobile phone all uses same number, as 18912340001.Therefore when other-end is called out this mobile phone, just need select various network to carry out addressing and route according to the media characteristic of calling out.And prior art does not provide the technology of carrying out addressing and route according to the media characteristic selection various network of calling out.
Summary of the invention
The present invention proposes to realize the method for routing of CDMA2000 terminal and soft switch terminal video interconnection, can solve the routing addressing problem when carrying out video interconnection between CDMA2000 terminal and the soft switch terminal.
In order to address the above problem, the present invention proposes to realize the method for routing of CDMA2000 terminal and soft switch terminal video interconnection, comprising:
Make a call between CDMA2000 terminal and the soft switch terminal, in the caller SDP information that is transmitted, increase the caller medium property;
When the caller medium property shows that calling is video call, caller SDP information is sent to the video communication Interworking gateway.
The present invention proposes to realize the MGCF (MGCF) of CDMA2000 terminal and soft switch terminal video interconnection, comprising:
The first medium property judge module is used for the caller medium property that caller SDP information is carried is judged, judges that promptly caller is audio call or video call;
First request sending module is coupled in the first medium property judge module, the video call that carries caller SDP information is sent to the video communication Interworking gateway when the caller medium property shows when being video call.
The present invention proposes to realize the soft switch of CDMA2000 terminal and soft switch terminal video interconnection, comprising:
The second medium property judge module is used for the caller medium property that caller SDP information is carried is judged, judges that promptly caller is audio call or video call;
Second request sending module; Be coupled in the second medium property judge module; When the caller medium property shows when being audio call; Directly send c net gateway exchange to handle audio call, the video call that carries caller SDP information is sent to the video communication Interworking gateway when being video call when the caller medium property shows.
The present invention is through increasing MGCF (MGCF) and the soft switch judgment mechanism to the caller medium property; Realize the differentiation route of audio call and video call, solved the routing addressing problem when carrying out video interconnection between CDMA2000 terminal and the soft switch terminal.Further, send the video communication Interworking gateway to handle video call.Thereby, can realize the video interconnection at CDMA2000 terminal and soft switch terminal.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 realizes the Organization Chart of the MGCF of CDMA2000 terminal and soft switch terminal video interconnection for the present invention.
Fig. 2 realizes the Organization Chart of the soft switch of CDMA2000 terminal and soft switch terminal video interconnection for the present invention.
Fig. 3 realizes the method for routing flow chart of CDMA2000 terminal and soft switch terminal video interconnection for the present invention.
Fig. 4 is the video interconnection method flow diagram at CDMA2000 terminal call soft switch terminal in the embodiment of the invention.
Fig. 5 is the video interconnection method flow diagram at soft switch terminal call CDMA2000 terminal in the embodiment of the invention.
Fig. 6 is the voice intercommunication method flow diagram at soft switch terminal call CDMA2000 terminal in the embodiment of the invention.
Embodiment
The present invention has increased the arbitration functions of the caller medium property that caller SDP information is comprised respectively at MGCF (MGCF) and Softswitch; What be used to judge calling user dials is video call or audio call; And according to the different route direction of different call selection; The operation of completion routing addressing, thus further realized CDMA2000 terminal and soft switch terminal video interconnection.
To combine accompanying drawing that the concrete framework of MGCF in the embodiment of the invention and Softswitch is elaborated below.
As shown in Figure 1, realize the Organization Chart of the MGCF of CDMA2000 terminal and soft switch terminal video interconnection for the present invention.Comprise the first medium property judge module 11 and first request sending module 12.
The first medium property judge module 11, the functional module for newly-increased is used for the caller medium property that caller SDP information is carried is judged, judges that promptly caller is audio call or video call.
As one embodiment of the present of invention; The first medium property judge module 11 receives the INVITE request from the CDMA2000 terminal; Carry caller SDP information in this request, when when caller SDP information of same, comprising the audio and video medium attribute, as one embodiment of the present of invention; SDP comprises value simultaneously and is the m line parameter of " audio " and " video ", and what show that caller dials is video call.
Here said SDP information can be the content shown in the following embodiment.What caller SDP information comprised all is calling party information.The callee can carry called SDP information in call answering, comprise called party information.What the present invention was used to judge the caller medium property mainly is the m line parameter, so, as an embodiment, only enumerated the m line parameter.Certainly, those skilled in the art is to be understood that said m line parameter just is used for for example, and is not used in limitation of the present invention.
V=0 (protocol version)
O=alice 53655765 2353687637IN IP4 192.168.254.75 (promoter and session identification)
C=IN IP4 192.168.254.75 (link information)
M=audio 3456RTP/AVP 8 (following 3 row are audio frequency media information, comprise coded format, transmit port, host-host protocol, packaging time length etc.)
a＝rtpmap：8PCMA/8000
a＝ptime：20
M=video 3458RTP/AVP 34 (following 4 row are video media information, comprise coded format, transmit port, host-host protocol, bandwidth, resolution etc.)
b＝AS：64
a＝fmtp：34?QCIF＝2?CIF＝2?MaxBR＝640
a＝rtpmap：34H263/90000
First request sending module 12 is coupled in the first medium property judge module 11, the video call that carries caller SDP information is sent to the video communication Interworking gateway when the caller medium property shows when being video call.
As one embodiment of the present of invention, first request sending module 12 is sent the INVITE request to the video communication Interworking gateway, in request, carries caller SDP information.Like this, the video communication Interworking gateway just can be controlled the calling and called both sides and accomplish the audio/video media capability negotiation.After consulting successfully, CDMA2000 terminal and soft switch terminal get into video call state.
Because 3G/IMS (IMS; IP Multimedia Subsystem; IP Multimedia System), soft-exchange construction can hold type, size, the different terminal of access way, also have nothing in common with each other to the support of media capability such as coded format, picture size in dissimilar terminals.For example; CDMA2000 handset adopts H.263 video coding, AMR speech coding, QCIF (176 * 144) picture size; H.264 mediaphone adopts video coding, G.711 speech coding, CIF (352 * 288) picture size, can't directly carry out video communication because of media capability is different between two kinds of terminals.So, need carry out media capability negotiation, the video consultation process in concrete negotiations process and the prior art between the performed other-end is identical.Such as, transmit calling party and callee's media information etc. through transmission SDP information.Just in this embodiment, negotiations process is carried out between MGCF, SS, video communication Interworking gateway and both sides terminal.
As shown in Figure 2, realize the Organization Chart of the Softswitch of CDMA2000 terminal and soft switch terminal video interconnection for the present invention.Softswitch is a kind of equipment of the core network, is similar to the switch in the traditional telephone network.With the Softswitch is that the network that capital equipment is set up is called flexible exchanging network.The soft switch terminal is meant the terminal that is linked in the flexible exchanging network.
For soft switch terminal call CDMA2000 terminal, Softswitch has increased the judgment mechanism to the caller medium property.Softswitch comprises the second medium property judge module 21 and second request sending module 22.
The second medium property judge module 21, the functional module for newly-increased is used for the caller medium property that caller SDP information is carried is judged, judges that promptly caller is audio call or video call.
As one embodiment of the present of invention; The second medium property judge module 21 receives the INVITE request; Carry caller SDP information in this request, only comprise voice if judge caller SDP information, such as; Caller SDP information only comprises value and is the m line parameter of " audio ", and what show that caller dials is audio call.If when comprising the audio and video medium attribute when judging caller SDP information of same, such as, comprise the m line parameter that value is " audio " and " video " during caller SDP information of same, what show that caller dials is video call.The particular content of caller SDP information is as described before.
Second request sending module 22; Be coupled in the second medium property judge module 21; When the caller medium property shows when being audio call; Directly send C net gateway exchange to handle audio call, the video call that carries caller SDP information is sent to the video communication Interworking gateway when being video call when the caller medium property shows.
As one embodiment of the present of invention, when including only audio-frequency information in the caller medium property, be indicated as audio call, when comprising audio/video information in the caller medium property, be indicated as video call.When carrying out video call, the video communication Interworking gateway can be controlled the calling and called both sides and accomplish the audio/video media capability negotiation.After consulting successfully, CDMA2000 terminal and soft switch terminal get into video call state.Performed media capability negotiation operation is said identical with before.
Application of the present invention mainly is to CDMA2000 terminal and soft switch terminal; The CDMA2000 terminal generally just is meant CDMA2000 handset; The terminal of the support video capability of soft switch terminal general reference access soft handoff network can be the hard terminal form, also can be the software terminal form that is contained on the PC.
The video communication at CDMA2000 terminal is new service application; The video interconnection at CDMA2000 terminal and soft switch terminal also is the new business demand that thereupon produces, and the technical scheme that realizes CDMA2000 terminal and soft switch terminal video interconnection is not arranged in the prior art as yet.The present invention is directed to this new demand and propose technical solution, for the video interconnection of realizing CDMA2000 terminal and soft switch terminal provides the foundation.Like this, when calling party and callee converse, the other side's sound can not only be heard, the other side's image can also be seen.
To the performed flow process of each module of the present invention be elaborated through accompanying drawing below.To accomplish the routing addressing operation that video interconnection is carried out at CDMA2000 terminal and soft switch terminal through each module that increases new function.As shown in Figure 3, the method for routing flow process of video interconnection may further comprise the steps:
In step 301, when making a call between CDMA2000 terminal and the soft switch terminal, in the caller SDP information that is transmitted, increase the caller medium property.
In step 302, when the caller medium property shows that calling is video call, caller SDP information is sent to the video communication Interworking gateway.
As one embodiment of the present of invention, in the caller medium property, comprise audio/video information, show that said calling is a video call.So far, accomplished the routing addressing operation of carrying out video interconnection in CDMA2000 terminal and soft switch terminal.Next, accomplish the audio/video media capability negotiation by video communication Interworking gateway control calling and called both sides, after consulting successfully, CDMA2000 terminal and soft switch terminal get into video call state.
Carry out comprising the process at CDMA2000 terminal call soft switch terminal among the method for routing embodiment of intercommunication at CDMA2000 of the present invention terminal and soft switch terminal, as shown in Figure 4; The process that comprises soft switch terminal call CDMA2000 terminal is like Fig. 5 and shown in Figure 6.To describe through concrete embodiment below.
Shown in Figure 4 for carrying out the method for routing of video interconnection in the one embodiment of the invention during CDMA2000 terminal call soft switch terminal.During CDMA2000 terminal call soft switch terminal, audio call can be initiated, also video call can be initiated.If audio call is called out in C net circuit domain and initiated, directly send the soft switch gateway exchange to handle; If video call is called out in the IMS territory and is initiated, then judge that by MGCF the caller medium property comprises voice and video simultaneously, send the video communication Interworking gateway to handle calling.Be specially:
Caller CDMA2000 starting terminal is to the video call at soft switch terminal; INVITE through based on the 3G/IMS network is initiated the video calling request to MGCF; Comprise the caller SDP information that shows the caller medium property in this request, said here caller medium property can be the audio/video type of coding tabulation that caller is supported.
The m line parameter of enumerating is exactly the tabulation of audio/video type of coding, can judge thus that calling out is simple audio call, or video call.For example " m=audio 1234RTP/AVP 8018 " and " m=video 3458RTP/AVP 34 117 " shows 3 kinds of speech codings of this terminal support (by code signal 8/0/18 expression) and 2 kinds of video codings (by code signal 34/117 expression).1234 and 3458 is port numbers, and port numbers is not as the basis for estimation of call property.
What MGCF can judge calling user dials according to caller SDP information is video call or audio call.When caller SDP information of same, comprising the voice and video medium property, promptly comprise the m line parameter of value for " audio " and " video " during caller SDP information of same, what show that caller dials is video call.
MGCF sends the INVITE request to the video communication Interworking gateway, in request, carries caller SDP information.Accomplish the routing addressing process.
Video communication Interworking gateway control calling and called both sides accomplish the audio/video media capability negotiation.After consulting successfully, CDMA2000 terminal and soft switch terminal get into video call state.
As one embodiment of the present of invention, during soft switch terminal call CDMA2000 terminal, can initiate audio call, also can initiate video call.If audio call judges that by soft switch the caller medium property only comprises voice, to call out and directly send C net gateway exchange to handle, process is as shown in Figure 6; If video call judges that by soft switch the caller medium property comprises voice and video simultaneously, then send the video communication Interworking gateway to handle calling, process is as shown in Figure 5.To combine each accompanying drawing to describe below.
Shown in Figure 5 for carrying out the method for routing of video interconnection in the one embodiment of the invention during soft switch terminal call CDMA2000 terminal.
Caller soft switch starting terminal is initiated video calling request through the INVITE request based on flexible exchanging network to soft switch to the video call at CDMA2000 terminal, comprises the caller SDP information that shows the caller medium property in this request.Caller SDP information comprises two m line parameters, m=audio 1234RTP/AVP 80 18 and m=video 3458RTP/AVP 34117.
It is video call that soft switch is judged this calling according to filter criteria, promptly comprises the m line parameter of value for " audio " and " video " during caller SDP information of same.
Soft switch is forwarded to the video communication Interworking gateway with caller INVITE request.
The video communication Interworking gateway is responsible for controlling the calling and called both sides and is accomplished the audio/video media capability negotiation.The calling and called both sides get into video call state.
Shown in Figure 6 for carrying out the method for routing of video interconnection in the one embodiment of the invention during soft switch terminal call CDMA2000 terminal.
Caller soft switch starting terminal asks to comprise the caller SDP information that shows the caller medium property in this request to the request of soft switch initiating speech conversation through the INVITE based on flexible exchanging network to the audio call at CDMA2000 terminal.Caller SDP information comprises a m line parameter, m=audio 1234RTP/AVP 80 18.
It is audio call that soft switch is judged this calling according to filter criteria, and promptly caller SDP information only comprises the m line parameter of value for " audio ".
Soft switch converts caller INVITE request to the IAM request, and sends to C net gateway exchange.
Soft switch and C net gateway exchange are responsible for controlling the calling and called both sides and are accomplished the audio frequency media capability negotiation.The calling and called both sides get into the voice call state.
The present invention has increased the medium property arbitration functions that MGCF and Softswitch comprise caller SDP, and selects different route direction according to judged result.For video call, send to the video communication Interworking gateway and carry out the audio/video media capability negotiation, after consulting successfully, CDMA2000 terminal and soft switch terminal get into video call state.
Will be understood that in one embodiment, the method step of being discussed is to be carried out by (one or more) proper process device that execution is stored in processing (the being computer) system of the instruction (code segment) in the storage device.Also will understand, the present invention is not limited to any specific implementation or programming technique, and the present invention can realize that the technology of described function realizes here with any suitable being used to.The present invention is not limited to any specific programming language or operating system.Thereby as what one skilled in the art will appreciate that, embodiments of the invention can be implemented as method, such as the such device of isolated plant, such as the such device of data handling system, perhaps bearing medium, for example computer program.Bearing medium carries the one or more computer-readable code sections that are used for the control processing system implementation method.Therefore, aspect of the present invention can take method, pure hardware embodiment, pure software embodiment perhaps to combine the form of the embodiment of software and hardware aspect.In addition, the present invention can take to carry the form of the bearing medium (the for example computer program on the computer-readable recording medium) of the computer readable program code section that is included in the medium.Can use any suitable computer-readable medium, comprising such as disk or the such magnetic storage apparatus of hard disk, perhaps such as the such optical storage media of CD-ROM.
As conclusion, should notice that those skilled in the art will be apparent to make many variations and modification to preferred embodiment, and not break away from principle of the present invention in fact describing in detail.This variation and modification are included within the described scope of the present invention of appended claims.
Claims (8)
1. realize the method for routing of CDMA2000 terminal and soft switch terminal video interconnection, comprising:
Make a call between CDMA2000 terminal and the soft switch terminal, in the caller SDP information that is transmitted, increase the caller medium property;
When the caller medium property shows that calling is video call, caller SDP information is sent to the video communication Interworking gateway.
2. according to the said method for routing of realizing CDMA2000 terminal and soft switch terminal video interconnection of claim 1; Wherein, Make a call between CDMA2000 terminal and the soft switch terminal, in the caller SDP information that is transmitted, increase the operation of caller medium property, comprising:
Caller CDMA2000 starting terminal increases the caller medium property to the calling at soft switch terminal in the caller SDP information that transmits to MGCF (MGCF).
3. according to the said method for routing of realizing CDMA2000 terminal and soft switch terminal video interconnection of claim 1; Wherein, Make a call between CDMA2000 terminal and the soft switch terminal, in the caller SDP information that is transmitted, increase the operation of caller medium property, comprising:
Caller soft switch starting terminal increases the caller medium property to the video call at CDMA2000 terminal in the caller SDP information that transmits to soft switch.
4. according to claim 1 or the 2 or 3 said method for routing of realizing CDMA2000 terminals and soft switch terminal video interconnection, wherein: when in the caller medium property, comprising audio/video information, show to call out to be video call.
5. realize the MGCF of CDMA2000 terminal and soft switch terminal video interconnection, comprising:
The first medium property judge module is used for the caller medium property that caller SDP information is carried is judged, judges that promptly caller is audio call or video call;
First request sending module is coupled in the first medium property judge module, the video call that carries caller SDP information is sent to the video communication Interworking gateway when the caller medium property shows when being video call.
6. according to the said MGCF of realizing CDMA2000 terminal and soft switch terminal video interconnection of claim 5, wherein: when comprising audio/video information in the caller medium property, show it is video call.
7. realize the soft switch of CDMA2000 terminal and soft switch terminal video interconnection, comprising:
The second medium property judge module is used for the caller medium property that caller SDP information is carried is judged, judges that promptly caller is audio call or video call;
Second request sending module; Be coupled in the second medium property judge module; When the caller medium property shows when being audio call; Directly send C net gateway exchange to handle audio call, the video call that carries caller SDP information is sent to the video communication Interworking gateway when being video call when the caller medium property shows.
8. according to the said soft switch that realizes CDMA2000 terminal and soft switch terminal video interconnection of claim 7; Wherein: when including only audio-frequency information in the caller medium property; Be indicated as audio call, when comprising audio/video information in the caller medium property, be indicated as video call.
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| CN201010563263.5A CN102480418B (en) | 2010-11-29 | 2010-11-29 | Routing method for realizing video frequency intercommunication for code division multiple access (CDMA) 2000 terminal and soft exchange terminal |
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