CN101562667B - Coding/decoding conversion control method, media gateway and system under soft switch architecture - Google Patents
Coding/decoding conversion control method, media gateway and system under soft switch architecture Download PDFInfo
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- CN101562667B CN101562667B CN 200910084784 CN200910084784A CN101562667B CN 101562667 B CN101562667 B CN 101562667B CN 200910084784 CN200910084784 CN 200910084784 CN 200910084784 A CN200910084784 A CN 200910084784A CN 101562667 B CN101562667 B CN 101562667B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
- H04M7/0072—Speech codec negotiation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1023—Media gateways
- H04L65/103—Media gateways in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
- H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
- H04M7/125—Details of gateway equipment
- H04M7/1255—Details of gateway equipment where the switching fabric and the switching logic are decomposed such as in Media Gateway Control
Abstract
The invention provides a coding/decoding conversion control method, a media gateway and a system under soft switch architecture. The method comprises that the media gateway acquires a coding/decoding algorithm capability set supported by a first terminal; the media gateway acquires a coding/decoding algorithm used by a second terminal; the media gateway judges whether the coding/decoding algorithmused by the second terminal is in the coding/decoding algorithm capability set supported by the first terminal, and if the algorithm is in the coding/decoding algorithm capability set, the media gate way does not apply for a voice transcoder card (VTC) channel, and directly carries out permeable transmission for the service of the first terminal and the second terminal; and if the algorithm is notin the coding/decoding algorithm capability set, the media gateway applies for the VTC channel, uses the VTC channel to carry out coding/decoding algorithm conversion for the service of the first ter minal and the second terminal, and transmits the converted service. The proposal of the invention saves VTC channel resources, reduces the equipment cost and maintenance cost, and improves the communication efficiency and success rate of a calling party and a called party.
Description
Technical field
The present invention relates to a kind of VOIP (Voice over Internet Protocol; Internet protocol voice technology; Be called for short the networking telephone) call out relevant H248 agreement, be meant coding/decoding conversion control method, WMG and system under a kind of soft-exchange construction especially.
Background technology
NGN (Next Generation Network, next generation network) is a kind of network architecture that the comprehensive opening that comprises that speech, data and multimedia etc. are professional can be provided.Soft switch is the controlled function entity of this network, and the calling control and the connection control function of the business with real-time requirement is provided for next generation network (NGN).Present NGN network is on existing network foundation, to have added soft switchcall server equipment; Like MGC (Media Gateway Controller; Media Gateway Controller), MG (Media Gateway, WMG) etc., thereby reach the purpose that soft switch service is provided on the existing network basis; Wherein, MGC also is called Call Agent or soft switch, like caller soft switch or called soft switch, is applied in the system of ip voice framework, controls a lot of terminals and WMG, and the H248 agreement is exactly the agreement that transport service adopted between MGC and the MG.
But at present in the NGN network, because the code decode algorithm that caller and called users is supported maybe be different, the code decode algorithm that caller is supported, called might the support; The code decode algorithm of called support, caller might not supported.Therefore; In order to realize the VOIP conversation of caller and called users; The encoding and decoding conversion ability need be provided between calling and called, and the Media Stream of assurance calling and called all uses the code decode algorithm of each self-supporting, and the encoding and decoding conversion function of this calling and called is called the Transcoding function.
Not enough below present Transcoding function exists:
When the calling and called code decode algorithm is consistent, also can take 2 VTC (Voice Transcoder Card, phonetic code type change-over panel) passage, the effect of this VTC passage is with carry out the conversion of phonetic code type, the data after the output conversion through the data of this passage; And this moment is because the calling and called code decode algorithm is the same; Need not carry out encoding and decoding conversion; Wasted valuable VTC resource; Increase equipment cost and maintenance cost, also reduced communication efficiency (because having increased the time of operation VTC passage) and call completing rate (because the possible overtime or failure of VTC operation).
Summary of the invention
The technical problem that the present invention will solve provides coding/decoding conversion control method, WMG and the system under a kind of soft-exchange construction of the VTC of saving resource.
For solving the problems of the technologies described above, embodiments of the invention provide the coding/decoding conversion control method under a kind of soft-exchange construction, comprising:
WMG obtains the code decode algorithm capability set that first terminal is supported;
Said WMG obtains the code decode algorithm that use at second terminal;
Said WMG judges that the code decode algorithm that said second terminal uses is whether in the code decode algorithm capability set that said first terminal is supported; If; Then do not apply for phonetic code type converter plate VTC passage, directly the business at said first terminal, said second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at said first terminal, second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted.
Wherein, the said WMG step of obtaining the code decode algorithm that uses at second terminal comprises:
Said WMG receives the context that the first terminal soft switch is sent; Said context is that the said first terminal soft switch is created according to the call request message at first terminal; The first terminal destination node and the second terminal destination node that carry the code decode algorithm transformational marker have been added in the said context; The corresponding realtime transmission protocol RTP resource of the said first terminal destination node, the corresponding RTP resource of the said second terminal destination node;
Said WMG is replied first code decode algorithm capability set of the said first terminal destination node support and the second code decode algorithm capability set that the said second terminal destination node is supported according to said code decode algorithm transformational marker to the said first terminal soft switch;
Said WMG obtains the code decode algorithm that use at said second terminal according to the negotiation result of said first terminal soft switch and the said second terminal soft switch negotiation from the said first terminal soft switch.
Wherein, the process of said first terminal soft switch and the said second terminal soft switch negotiation comprises:
The said first terminal soft switch is sent call request message and is given the said second terminal soft switch, carries the said second code decode algorithm capability set in the said call request message;
The code decode algorithm capability set of the said second code decode algorithm capability set and himself support is mated in the said second terminal soft switch; Produce matching result; And in said matching result, confirm the code decode algorithm that use at said second terminal, and the code decode algorithm that said second terminal is used replies to the said first terminal soft switch.
Wherein, the said WMG step of obtaining the code decode algorithm that said second terminal uses from the said first terminal soft switch comprises:
The said second terminal destination node in the said WMG receives the modification message that the said first terminal soft switch is sent, and carries the code decode algorithm that use at said second terminal in the said modification message;
The said second terminal destination node confirms that the code decode algorithm capability set of the far-end support of the said second terminal destination node is: the code decode algorithm that use at said second terminal; And the code decode algorithm capability set that the far-end that sends the said second terminal destination node is supported gives the said first terminal soft switch, and the code decode algorithm capability set of the far-end support of the said second terminal destination node is write in the data field of the said first terminal destination node.
Wherein, the said WMG step of obtaining the code decode algorithm capability set of supporting at first terminal comprises:
The said first terminal destination node in the said WMG receives the said first terminal soft switch and sends modification message; Carry the code decode algorithm capability set of the far-end support of the said first terminal destination node in the said modification message, the code decode algorithm capability set of the far-end support of the said first terminal destination node is: the code decode algorithm capability set that said first terminal that the said first terminal soft switch is obtained from the call request message at said first terminal is supported.
Wherein, saidly directly the business at said first terminal, said second terminal is carried out transparent transmission; The step of perhaps business after the conversion being transmitted is specially:
Directly the business at said first terminal, said second terminal is carried out transparent transmission through medium IP interface board NIPI passage; Perhaps the business after changing is transmitted through the NIPI passage.
Wherein, saidly directly the business at said first terminal, said second terminal is carried out also comprising before the step of transparent transmission: establish timer through medium IP interface board NIPI passage;
Saidly directly the step that the business at said first terminal, said second terminal is carried out transparent transmission is comprised through medium IP interface board NIPI passage:
The said first terminal destination node is opened the NIPI passage, notifies the said second terminal destination node to carry out the transparent transmission of the business at said first terminal, said second terminal;
If the said second terminal destination node is opened NIPI passage success, then replys successfully to the said first terminal destination node, open the failure of NIPI passage or when overtime, fail for the said first terminal destination node answer;
The said first terminal destination node receives and replys successfully to the said first terminal soft switch when the said second terminal destination node is successfully replied, otherwise, reply failure to the said first terminal soft switch.
Wherein, the said step of business after changing being transmitted through the NIPI passage also comprises before:
If timer;
Utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, the step of the business after changing being transmitted through the NIPI passage comprises:
The said first terminal destination node is opened VTC passage and NIPI passage, notifies the said second terminal destination node to carry out the code decode algorithm conversion;
If the said second terminal destination node is opened the success of VTC passage and NIPI passage, then replys successfully to the said first terminal destination node, open the failure of VTC passage and NIPI passage when perhaps overtime, fail to the said first terminal destination node answer;
The said first terminal destination node receives and replys successfully to the said first terminal soft switch when the said second terminal destination node is successfully replied, otherwise, reply failure to the said first terminal soft switch.
Wherein, In above-mentioned all methods; Said first terminal, said second terminal business get into transparent transmission after, if the said first terminal destination node is received the modification message of the said first terminal soft switch, judge that the code decode algorithm that uses at said second terminal is not in the code decode algorithm capability set that said first terminal is supported; In the time of need carrying out the code decode algorithm conversion, then the business with said first terminal destination node and the said second terminal destination node switches to the code decode algorithm conversion from transparent transmission.
Wherein, said business with said first terminal destination node and the said second terminal destination node comprises from the step that transparent transmission switches to the code decode algorithm conversion:
The said first terminal destination node is opened the VTC passage, revises the NIPI passage, notifies the said second terminal destination node to carry out the code decode algorithm conversion;
After the said second terminal destination node was opened the VTC passage and revised the success of NIPI passage, said first terminal destination node and the said second terminal destination node utilized the VTC passage to carry out the code decode algorithm conversion, through said NIPI passage the business after changing are transmitted.
Wherein, said first terminal is caller, and said second terminal is called.
For solving the problems of the technologies described above, embodiments of the invention also provide a kind of WMG, comprising:
First acquisition module is used to obtain the code decode algorithm capability set that first terminal is supported;
Second acquisition module is used to obtain the code decode algorithm that use at second terminal;
The encoding and decoding conversion control module; Be used for judging the code decode algorithm the capability set whether code decode algorithm that uses at said second terminal is supported at said first terminal; If; Then do not apply for phonetic code type converter plate VTC passage, directly the business at said first terminal, said second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted.
Wherein, said second acquisition module comprises:
Receiver module; Be used to receive the context that the first terminal soft switch is sent; Said context is that the said first terminal soft switch is created according to the call request message at said first terminal; The first terminal destination node and the second terminal destination node that carry the code decode algorithm transformational marker have been added in the said context, the corresponding realtime transmission protocol RTP resource of the said first terminal destination node, the corresponding RTP resource of the said second terminal destination node;
Sending module is used for according to said code decode algorithm transformational marker, replys first code decode algorithm capability set of the said first terminal destination node support and the second code decode algorithm capability set that the said second terminal destination node is supported to the said first terminal soft switch;
Obtain submodule, be used for negotiation result, obtain the code decode algorithm that use at said second terminal from the said first terminal soft switch according to said first terminal soft switch and the said second terminal soft switch negotiation.
Wherein, the said submodule that obtains is specially:
The second terminal destination node module is used to receive the modification message that the said first terminal soft switch is sent, and carries the code decode algorithm that use at said second terminal in the said modification message; And the code decode algorithm capability set of confirming the far-end support of the said second terminal destination node is: the code decode algorithm that use at said second terminal; And the code decode algorithm capability set that the far-end that sends the said second terminal destination node is supported gives the said first terminal soft switch, and the code decode algorithm capability set of the far-end support of the said second terminal destination node is write in the data field of the said first terminal destination node.
Wherein, said first acquisition module is specially:
The first terminal destination node module; Be used to receive the said first terminal soft switch and send modification message; Carry the code decode algorithm capability set of the far-end support of the said first terminal destination node in the said modification message, the code decode algorithm capability set of the far-end support of the said first terminal destination node is: the code decode algorithm capability set that said first terminal that the said first terminal soft switch is obtained from the call request message at said first terminal is supported.
Wherein, above-mentioned WMG also comprises:
Handover module; Be used for after the business at said first terminal, said second terminal gets into transparent transmission; If the said first terminal destination node is received the modification message of the said first terminal soft switch; Judge the code decode algorithm that uses at said second terminal not in the code decode algorithm capability set that said first terminal is supported, in the time of need carrying out the code decode algorithm conversion, then the business with said first terminal destination node and the said second terminal destination node switches to the code decode algorithm conversion from transparent transmission.
For solving the problems of the technologies described above, embodiments of the invention also provide the control system of the encoding and decoding conversion under a kind of soft-exchange construction, comprising:
The first terminal soft switch is used to obtain the code decode algorithm capability set that first terminal corresponding with the said first terminal soft switch supported;
The second terminal soft switch is used to obtain the code decode algorithm that use at second terminal corresponding with the said second terminal soft switch;
WMG; Be used for judging the code decode algorithm the capability set whether code decode algorithm that uses at said second terminal is supported at said first terminal; If, then do not apply for phonetic code type converter plate VTC passage, directly the business at said first terminal, said second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted.
The beneficial effect of technique scheme of the present invention is following:
In the such scheme; WMG through the code decode algorithm judging second terminal (promptly called) and use whether in the code decode algorithm capability set that first terminal (being caller) supported; Be about to the code decode algorithm of called use and the code decode algorithm capability set of caller support and mate, if, promptly mate successfully; Need not apply for the VTC channel resource, directly carry out professional transparent transmission; And in the prior art, no matter whether the code decode algorithm of calling and called is consistent, all need apply for the VTC channel resource, carries out the code decode algorithm conversion of calling and called; This shows that such scheme of the present invention has been saved the VTC channel resource than existing method, reduce equipment cost and maintenance cost, improve the communication efficiency and the call completing rate of calling and called.
Description of drawings
Fig. 1 is the coding/decoding conversion control method schematic flow sheet under the embodiments of the invention soft-exchange construction;
Fig. 2 is a concrete realization flow sketch map of method shown in Figure 1;
Fig. 3 is a concrete realization flow sketch map of method shown in Figure 2;
Fig. 4 is a concrete realization flow sketch map of method shown in Figure 3;
Fig. 5 is that Fig. 1-method shown in Figure 4 is applied to the idiographic flow sketch map in the NGN network;
Fig. 6 is the structural representation of embodiments of the invention WMG;
Fig. 7 is a specific embodiment structural representation of WMG shown in Figure 6;
Fig. 8 is a specific embodiment structural representation of WMG shown in Figure 7;
Fig. 9 is a specific embodiment structural representation of WMG shown in Figure 8;
Figure 10 is the structural representation that has handover module in Fig. 6-WMG shown in Figure 9;
Figure 11 is the encoding and decoding conversion control system structural representation under the soft-exchange construction of the present invention.
Embodiment
For technical problem, technical scheme and advantage that the present invention will be solved is clearer, will combine accompanying drawing and specific embodiment to be described in detail below.
The present invention is directed to when calling and called are realized the VOIP conversation in the existing NGN network; The code decode algorithm conversion Transcoding function of calling and called; Waste VTC problem of resource provides coding/decoding conversion control method, WMG and system under a kind of soft-exchange construction of the VTC of saving resource.
As shown in Figure 1, the coding/decoding conversion control method under the embodiments of the invention soft-exchange construction comprises:
Step 15, application VTC passage utilizes said VTC passage that the business at first terminal, second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted.
Among this embodiment, first terminal and second terminal are two entities of equity, and first terminal can be caller, also can be for called; This second terminal can also can be caller for called; In following examples of the present invention, be caller with this first terminal, second terminal is calledly to describe for example; Certainly, be called for first terminal, second terminal is the coding/decoding control method of caller; Be equally applicable to following all embodiment; Its control method and first terminal are caller, and second terminal is that called control method is identical, hereinafter repeats no more; But it is called that scheme of the present invention should comprise first terminal, and second terminal is the coding/decoding control method embodiment of caller.
Among this embodiment, whether WMG, is about to the code decode algorithm of called use and the code decode algorithm capability set of caller support and matees in the code decode algorithm capability set that first terminal (being caller) supported through the code decode algorithm judging second terminal (promptly called) and use; If, promptly mate successfully, need not apply for the VTC channel resource; Calling and called just directly carry out professional transparent transmission like this; If do not exist, promptly coupling is unsuccessful, applies for the VTC channel resource again; The business of calling and called is carried out the code decode algorithm conversion, the business after the conversion is transmitted;
And in the prior art, no matter whether the code decode algorithm of calling and called is consistent, all need apply for the VTC resource, carries out the code decode algorithm conversion of calling and called; This shows that the above embodiment of the present invention has been saved the VTC channel resource than existing method, reduce cost, improve the communication efficiency and the call completing rate of calling and called.
At first terminal is caller; When second terminal was called, the first following terminal soft switch can be the caller soft switch, and the first terminal destination node can be the caller destination node; The second terminal soft switch can be called soft switch, and the second terminal destination node can be called destination node;
As shown in Figure 2, above-mentioned embodiment illustrated in fig. 1 in, step 12 specifically can may further comprise the steps:
Step 121; WMG receives the context that the first terminal soft switch is sent; This context is that the first terminal soft switch is created according to the call request message at first terminal, has added the first terminal destination node and the second terminal destination node that carry the code decode algorithm transformational marker in this context, wherein; The corresponding realtime transmission protocol RTP resource of the first terminal destination node, the corresponding RTP resource of the second terminal destination node; Specifically, be caller with first terminal, second terminal is that called concrete implementation procedure is:
The caller soft switch (is passed through SDP (Session Description Protocol according to the call request message of caller in this call request message; Session Description Protocol) descriptor carries the code decode algorithm capability set that caller is supported); Send context (Context) to WMG; The caller destination node and the called destination node that carry code decode algorithm transformational marker (Transcoding) have been added in this context; The corresponding realtime transmission protocol RTP resource of this caller destination node, the corresponding RTP resource of this called destination node;
In this step, caller is initiated a call request message to the caller soft switch, after this call request message is received in the caller soft switch; Think and to initiate a calling and called call flow; This caller soft switch will be created a context (Context), and context is the contact of some terminal rooms, and it describes topological relation and the parameter of medium mixing/exchange between the terminal; Two RTP resources have been added in this context; One of them is the caller destination node, and another is called destination node, and these two RTP resources have been added code decode algorithm transformational marker (Transcoding) respectively; WMG will get into the encoding and decoding conversion control flow according to this code decode algorithm transformational marker when receiving these two RTP resources;
Step 122, WMG are replied first code decode algorithm capability set of this first terminal destination node support and the second code decode algorithm capability set that the second terminal destination node is supported according to this code decode algorithm transformational marker to the first terminal soft switch;
Step 123, WMG obtains the code decode algorithm that use at second terminal according to the negotiation result of the first terminal soft switch and the second terminal soft switch negotiation from the first terminal soft switch; Specifically, be caller with first terminal, second terminal is that called concrete implementation procedure is:
The caller soft switch is held consultation according to this first code decode algorithm capability set and this second code decode algorithm capability set and called soft switch, produces negotiation result; Purpose is in order to obtain the code decode algorithm of called use, so that follow-uply mate with the code decode algorithm capability set caller support, whether the code decode algorithm of judging calling and called unanimity; WMG obtains the code decode algorithm of called use according to this negotiation result.
As shown in Figure 3, in the above-mentioned flow process shown in Figure 2, in the step 123, the process that the first terminal soft switch and the second terminal soft switch are consulted can specifically comprise the steps:
Step 1231, the first terminal soft switch is sent call request message and is given the second terminal soft switch, carries the code decode algorithm capability set that the second terminal destination node is supported in this call request message: i.e. the second code decode algorithm capability set;
Step 1232; The code decode algorithm capability set of this second code decode algorithm capability set and himself support is mated in the second terminal soft switch; Produce matching result, promptly this matching result is the common factor of the code decode algorithm capability set of this second code decode algorithm capability set and the support of second terminal, and this common factor possibly be the set of a code decode algorithm capability set; It also possibly be a code decode algorithm; But in this negotiations process, the code decode algorithm that use at second terminal is a code decode algorithm in this common factor, therefore; The second terminal soft switch also need be confirmed the code decode algorithm that use at this second terminal in this matching result, and the code decode algorithm that this second terminal is used replies to the first terminal soft switch.
Accordingly, in the above-mentioned steps 123, WMG obtains the code decode algorithm that uses at second terminal from the first terminal soft switch and can specifically comprise:
Step 1233, the first terminal soft switch are sent and are revised message to the second terminal destination node in the WMG, carry the code decode algorithm of second terminal use that obtains in the above-mentioned steps 1232 in this modification message;
Step 1234; The second terminal destination node confirms that according to this modification message the code decode algorithm capability set of the far-end support of this second terminal destination node is: the code decode algorithm that use at this second terminal; Transmit a reply message to the first terminal soft switch; Carry in this answer message: the code decode algorithm capability set that the far-end of the second terminal destination node is supported; Simultaneously, this second terminal destination node also writes the code decode algorithm capability set of the far-end support of this second terminal destination node in the data field of the first terminal destination node, so that the code decode algorithm of the code decode algorithm capability set that the first terminal destination node is supported first terminal and the use of this second terminal matees.
As shown in Figure 4, in conjunction with above-mentioned Fig. 1, Fig. 2, specific embodiment shown in Figure 3, above-mentioned steps 11 can specifically comprise:
Step 111, the first terminal soft switch obtains the call request message at first terminal from above-mentioned steps 121, and from this call request message, obtains the code decode algorithm capability set that first terminal is supported;
Step 112; The first terminal destination node in the WMG receives the modification message that the first terminal soft switch is sent; Carry the code decode algorithm capability set of the far-end support of the first terminal destination node in this modification message, the code decode algorithm capability set of the far-end support of this first terminal destination node is: the code decode algorithm capability set that first terminal is supported;
After the code decode algorithm that like this, use at the code decode algorithm that use at the code decode algorithm capability set that this first terminal destination node has just obtained to support at first terminal and second terminal, this first terminal destination node code decode algorithm capability set that obtained to support at first terminal and second terminal; The two is mated, judge the code decode algorithm that uses at second terminal whether in the code decode algorithm capability set that this first terminal is supported, if; Just do not apply for the VTC passage; Directly the business at first terminal, second terminal is carried out transparent transmission (promptly to the transmission of the business between the calling and called without any processing), if do not exist, application VTC passage and pass-through channel; After utilizing the VTC passage that the business at first terminal, second terminal is carried out encoding and decoding conversion; Utilize pass-through channel to carry out transparent transmission, whether consistent than the code decode algorithm of existing no matter calling and called like this, all apply for the VTC passage; Save the VTC channel resource, improved professional communication efficiency and the call completing rate of calling and called.
In addition, in above-mentioned all embodiment, directly the business at first terminal, second terminal is carried out transparent transmission; The step of perhaps business after the conversion being transmitted can be specially:
Directly the business at first terminal, second terminal is carried out transparent transmission through NIPI passage (medium IP interface board); Perhaps the business after changing is transmitted through the NIPI passage.
The first terminal destination node, the second terminal destination node have following three kinds of situation when utilizing the NIPI passage directly the business at first terminal, second terminal to be carried out transparent transmission:
(1) do not need the transparent transmission of encoding and decoding conversion
When the first terminal destination node judges that the code decode algorithm that uses at second terminal follows the code decode algorithm capability set of the far-end support of oneself that common factor is arranged; Need not apply for the VTC channel resource; The first terminal destination node is opened the NIPI passage; If timer notifies the second terminal destination node to carry out the transparent transmission of the business at first terminal, second terminal;
If the second terminal destination node is opened NIPI passage success, then replys successfully to the first terminal destination node, open the failure of NIPI passage or when overtime, fail to the first terminal destination node answer;
The first terminal destination node receives and replys successfully to the first terminal soft switch when the second terminal destination node is successfully replied, otherwise, reply failure to the first terminal soft switch.
(2) transparent transmission that needs code decode algorithm to change
When the first terminal destination node judges that the code decode algorithm that uses at second terminal follows the code decode algorithm capability set of the far-end support of oneself not occur simultaneously, apply for that the VTC channel resource carries out the code decode algorithm conversion;
The first terminal destination node is opened VTC passage and NIPI passage, establishes timer, notifies the second terminal destination node to carry out the code decode algorithm conversion;
If the second terminal destination node is opened the success of VTC passage and NIPI passage, then replys successfully to the first terminal destination node, open the failure of VTC passage and NIPI passage when perhaps overtime, fail to the first terminal destination node answer;
The first terminal destination node receives and replys successfully to the first terminal soft switch when the second terminal destination node is successfully replied, otherwise, reply failure to the first terminal soft switch.
(3) if there is the first terminal soft switch to send new code decode algorithm capability set to WMG, the code decode algorithm at first terminal and second terminal possibly mate inconsistent, then need be from being transparent to the switching of code decode algorithm conversion;
Specifically; After the business at first terminal, second terminal gets into transparent transmission; If the first terminal destination node is received the modification message of the first terminal soft switch; Judge the code decode algorithm that uses at second terminal not in the code decode algorithm capability set that first terminal is supported, in the time of need carrying out the code decode algorithm conversion, then the first terminal destination node and the second terminal destination node switch to the code decode algorithm conversion with business from transparent transmission;
This first terminal destination node and the second terminal destination node comprise business from the step that transparent transmission switches to the code decode algorithm conversion:
The first terminal destination node is opened the VTC passage, revises the NIPI passage, notifies the second terminal destination node to carry out the code decode algorithm conversion;
After the second terminal destination node was opened the VTC passage and revised the success of NIPI passage, the first terminal destination node and the second terminal destination node utilized the VTC passage to carry out the code decode algorithm conversion, through the NIPI passage business after changing are transmitted.
Combine Fig. 5 that said method is described in the application of concrete NGN network below again; This method mainly is to increase a Transcoding attribute in SDP (Session Description Protocol) descriptor of the control protocol H248 agreement between calling and called soft switch and WMG; Indicating media gateway carries out the Transcoding flow process: as shown in Figure 5, this method comprises:
1. caller (being above-mentioned first terminal) is sent Invite message and is given caller soft switch (being the above-mentioned first terminal soft switch); The effect of this Invite message is: the request of making a call; SDP descriptor in this Invite message is S1, and this S1 representes the code decode algorithm capability set that this caller is supported;
2. after this Invite message is received in the caller soft switch, send order Add (C=$, A=$ to WMG; Codec=c, A=$, Codec=c; A=transcoding), the effect of this order is: create a context (Context), and in this context, add 2 RTP (RTP) resource; Be with Transcoding mark (code decode algorithm transformational marker), indicating media gateway gets into the Transcoding flow process; Here, 2 RTP are as being respectively Ra and Rb, wherein; Ra can represent the corresponding RTP resource of caller destination node (being the above-mentioned first terminal destination node); Rb can represent the corresponding RTP resource of called destination node (being the above-mentioned second terminal destination node), and Ra here and Rb are conveniently named for representing, the RTP resource that does not limit this caller destination node must be Ra; Also can be Rb; As a same reason, it is the RTP resource of this called destination node that Rb does not limit yet, and the RTP resource that called destination node is corresponding also can be Ra;
3. WMG is after the Add order of receiving the caller soft switch; Reply Reply (C=C1 to the caller soft switch; A=Ra (SDP=Sa '); A=Rb (SDP=Sb ')) message, the effect of this message is: reply the code decode algorithm capability set of caller destination node support and the code decode algorithm capability set of called destination node support and give the caller soft switch; Here; The code decode algorithm capability set of caller destination node and called destination node support all is code decode algorithm capability sets that this WMG is supported; Wherein, C1 is this contextual numbering, A=Ra (SDP=Sa '); The code decode algorithm capability set that expression caller destination node Ra supports is Sa ', i.e. the first code decode algorithm capability set of the support of the caller destination node in the foregoing description; A=Rb (SDP=Sb '); Represent that the code decode algorithm capability set that called destination node Rb supports is Sb '; It is the second code decode algorithm capability set that the called destination node in the foregoing description is supported; Wherein this Sa ' is identical set with this Sb ', because they all are code decode algorithm capability sets that WMG is supported;
4. the caller soft switch is sent Invite message and is given called soft switch (being the above-mentioned second terminal soft switch); The effect of this Invite message is: to the called soft switch request of making a call; SDP descriptor in this Invite message is Sb ', and the second code decode algorithm capability set Sb ' that is about to called destination node support tells called soft switch; In this step, if the code decode algorithm capability set of above-mentioned called destination node support is Sa ' expression, the SDP descriptor in this Invite message also can be Sa ' so;
5. the code decode algorithm capability set of Sb ' and oneself support is mated in called soft switch, if common factor is arranged, the code decode algorithm S2 that called (being above-mentioned second terminal) uses is confirmed in then called soft switch in this common factor; If this common factor representes that with array the volume solution algorithm of this called use is exactly first code decode algorithm in this array usually so; Called soft switch is also replied Ring message to the caller soft switch; Wherein the SDP descriptor is S2; The code decode algorithm that is about to called use replies to the caller soft switch; If the code decode algorithm capability set of Sb ' and oneself support is mated in called soft switch, when not occuring simultaneously, just reply and consult failure to the caller soft switch;
6. the caller soft switch is sent Modify message and is given the called destination node Rb in the WMG; This Modify message is with ordering: MF (C=C1; MF=Rb (MO=SR, Remote=S2)) expression, the effect of this order are to confirm that the code decode algorithm capability set of the far-end support of called destination node Rb is S2;
7. the called destination node Rb in the WMG replys Modify Reply to the caller soft switch, and wherein the SDP descriptor is S2, and with the data field that this S2 writes caller destination node Ra, matees so that Ra carries out the calling and called code decode algorithm later on;
8. the caller soft switch is sent Modify message and is given the caller destination node Ra in the WMG; This Modify message is with ordering: MF (C=C1; MF=Ra (MO=SR; Remote=S1)) expression, the effect of this order are that the code decode algorithm capability set with the far-end support of caller destination node Ra sends to caller destination node Ra, and wherein the code decode algorithm capability set of the far-end support of this Ra is: the code decode algorithm capability set S1 that this caller is supported;
9. the caller destination node Ra in the WMG compares according to the code decode algorithm capability set S1 of the S2 in its data field and its far-end support; If S2 is in this S1; Then calling and called mate successfully; Explain that Ra and Rb need not carry out the code decode algorithm conversion, need not apply for the VTC channel resource, directly use the NIPI passage that the business of calling and called is carried out transparent transmission and get final product; If S2 is not in this S1, then the calling and called coupling is unsuccessful, explains that Ra and Rb need carry out the code decode algorithm conversion; Need application VTC channel resource and NIPI channel resource, carry out the code decode algorithm conversion, the Ra in this WMG also matees the code decode algorithm capability set Sa ' that himself supports and this S1; If mate successfully; Be that Sa ' has common factor with this S1, then in this occurs simultaneously, confirm a code decode algorithm Sa, reply to the caller soft switch; If coupling is unsuccessful, then reply failure to the caller soft switch;
10. the caller soft switch is replied Ring message to caller; Sa is replied to caller; Caller is carried out calling and called professional encoding and decoding conversion with its business through the VTC passage according to this Sa algorithm, converts a kind of general form into, like TDM (time division multiplexing) form; Business after utilizing the NIPI passage to conversion is transferred to when called, the business of this general format is converted into the form of called support again; Thereby make calling and called get into the normal talking flow process.
To sum up; The above embodiment of the present invention is through increasing a Transcoding mark in the SDP of H248 agreement descriptor, indicating media gateway matees the code decode algorithm of calling and called, if the code decode algorithm capability set that the code decode algorithm of called use and caller are supported matees successfully; Then do not apply for the VTC channel resource; Do not carry out the professional encoding and decoding conversion of calling and called, so just saved valuable VTC channel resource, when expanding the H248 protocol package; Said method is improved the communication efficiency of calling and called and call completing rate, and reduces network cost.
As shown in Figure 6, embodiments of the invention also provide a kind of WMG 60, and this WMG 60 is applied in the coding/decoding conversion control method of the calling and called under the soft-exchange construction, and this WMG 60 specifically comprises:
Encoding and decoding conversion control module 63; Be used for judging the code decode algorithm the capability set whether code decode algorithm that uses at second terminal is supported at first terminal; If, then do not apply for phonetic code type converter plate VTC passage, directly the business at this first terminal, second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at this first terminal, second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted.
Among this embodiment, first terminal can be caller, also can be for called; This second terminal can also can be caller for called; In following examples of WMG of the present invention, be caller with this first terminal, second terminal is calledly to describe for example; Certainly; For first terminal is called, and second terminal is that caller is equally applicable to following all embodiment, and its control method and first terminal are caller; Second terminal is that called control method is identical; Hereinafter repeating no more, is called but scheme of the present invention should comprise first terminal, and second terminal is the embodiment of caller;
As shown in Figure 7, above-mentioned second acquisition module 62 can specifically comprise:
Sending module 622 is used for according to this code decode algorithm transformational marker, replys first code decode algorithm capability set of the first terminal destination node support and the second code decode algorithm capability set that the second terminal destination node is supported to the first terminal soft switch;
Obtain submodule 623, be used for negotiation result, obtain the code decode algorithm that use at second terminal from the first terminal soft switch according to this first terminal soft switch and the second terminal soft switch negotiation.
Specifically, the process of this first terminal soft switch and the second terminal soft switch negotiation can specifically comprise the steps:
The first terminal soft switch is sent call request message and is given the second terminal soft switch, carries the code decode algorithm capability set that the second terminal destination node is supported in this call request message: i.e. the second code decode algorithm capability set;
The code decode algorithm capability set of this second code decode algorithm capability set and himself support is mated in the second terminal soft switch; Produce matching result; Promptly this matching result is the common factor of the code decode algorithm capability set of this second code decode algorithm capability set and the support of second terminal; This common factor possibly be the set of a code decode algorithm capability set, also possibly be a code decode algorithm, but in this negotiations process; The code decode algorithm that use at second terminal is a code decode algorithm in this common factor; Therefore, the second terminal soft switch also need be confirmed the code decode algorithm that use at this second terminal in this matching result, and the code decode algorithm that this second terminal is used replies to the first terminal soft switch.
As shown in Figure 8, the above-mentioned submodule 623 that obtains can be specially:
The second terminal destination node module is used to receive the modification message that the first terminal soft switch is sent, and carries the code decode algorithm that use at second terminal in this modification message; And the code decode algorithm capability set of confirming the far-end support of this second terminal destination node is: the code decode algorithm that use at second terminal; And the code decode algorithm capability set that sends the far-end support of this second terminal destination node gives this first terminal soft switch, and the code decode algorithm capability set of the far-end support of this second terminal destination node is write in the data field of the first terminal destination node.
As shown in Figure 9, above-mentioned first acquisition module 61 is specially:
The first terminal destination node module; Be used to receive the first terminal soft switch and send modification message; Carry the code decode algorithm capability set of the far-end support of the first terminal destination node in this modification message, the code decode algorithm capability set of the far-end support of this first terminal destination node is: the code decode algorithm capability set that first terminal that the first terminal soft switch is obtained from the call request message at first terminal is supported.
Shown in figure 10, in above-mentioned Fig. 6-WMG 60 shown in Figure 9, also comprise:
This switching flow specifically comprises:
The first terminal destination node is opened the VTC passage, revises the NIPI passage, notifies the second terminal destination node to carry out the code decode algorithm conversion;
After the second terminal destination node was opened the VTC passage and revised the success of NIPI passage, the first terminal destination node and the second terminal destination node utilized the VTC passage to carry out the code decode algorithm conversion, through the NIPI passage business after changing are transmitted.
Whether the encoding and decoding conversion control module 63 in the embodiments of the invention WMG, is about to the code decode algorithm of called use and the code decode algorithm capability set of caller support and matees in the code decode algorithm capability set that first terminal (being caller) supported through the code decode algorithm judging second terminal (promptly called) and use, as if; Promptly mate successfully; Need not apply for the VTC channel resource, calling and called just directly carry out professional transparent transmission like this, if do not exist; Promptly coupling is unsuccessful; Apply for the VTC channel resource again, the business of calling and called is carried out the code decode algorithm conversion, the business after the conversion is transmitted;
And in the prior art, no matter whether the code decode algorithm of calling and called is consistent, all need apply for the VTC resource, carries out the code decode algorithm conversion of calling and called; This shows that the above embodiment of the present invention has been saved the VTC channel resource than existing method, reduce cost, improve the communication efficiency and the call completing rate of calling and called.
Shown in figure 11, embodiments of the invention also provide the control system of the encoding and decoding conversion under a kind of soft-exchange construction, comprising:
The first terminal soft switch is used to obtain the code decode algorithm capability set that first terminal corresponding with the first terminal soft switch supported;
The second terminal soft switch is used to obtain the code decode algorithm that use at second terminal corresponding with the second terminal soft switch;
WMG is used for judging the code decode algorithm the capability set whether code decode algorithm that uses at this second terminal is supported at first terminal, if, then do not apply for phonetic code type converter plate VTC passage, directly the business at first terminal, second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize the VTC passage that the business at first terminal, second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted.
In this system embodiment of the present invention; In the coding/decoding control method under the above-mentioned soft-exchange construction about all interaction flows between the first terminal soft switch (being the caller soft switch) and second terminal soft switch (being called soft switch) and the WMG; All be applicable in this system embodiment, repeat no more at this.
Whether the WMG in this system embodiment, is about to the code decode algorithm of called use and the code decode algorithm capability set of caller support and matees in the code decode algorithm capability set that first terminal (being caller) supported through the code decode algorithm judging second terminal (promptly called) and use, as if; Promptly mate successfully; Need not apply for the VTC channel resource, calling and called just directly carry out professional transparent transmission like this, if do not exist; Promptly coupling is unsuccessful; Apply for the VTC channel resource again, the business of calling and called is carried out the code decode algorithm conversion, the business after the conversion is transmitted;
And in the prior art, no matter whether the code decode algorithm of calling and called is consistent, all need apply for the VTC resource, carries out the code decode algorithm conversion of calling and called; This shows that the above embodiment of the present invention has been saved the VTC channel resource than existing method, reduce cost, improve the communication efficiency and the call completing rate of calling and called.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle according to the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (15)
1. the coding/decoding conversion control method under the soft-exchange construction is characterized in that, comprising:
WMG obtains the code decode algorithm capability set that first terminal is supported;
Said WMG obtains the code decode algorithm that use at second terminal;
Said WMG judges that the code decode algorithm that said second terminal uses is whether in the code decode algorithm capability set that said first terminal is supported; If; Then do not apply for phonetic code type converter plate VTC passage, directly the business at said first terminal, said second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted; Wherein, the said WMG step of obtaining the code decode algorithm that uses at second terminal comprises:
Said WMG receives the context that the first terminal soft switch is sent; Said context is that the said first terminal soft switch is created according to the call request message at first terminal; The first terminal destination node and the second terminal destination node that carry the code decode algorithm transformational marker have been added in the said context; The corresponding realtime transmission protocol RTP resource of the said first terminal destination node, the corresponding RTP resource of the said second terminal destination node;
Said WMG is replied first code decode algorithm capability set of the said first terminal destination node support and the second code decode algorithm capability set that the said second terminal destination node is supported according to said code decode algorithm transformational marker to the said first terminal soft switch;
Said WMG obtains the code decode algorithm that use at said second terminal according to the negotiation result of said first terminal soft switch and the said second terminal soft switch negotiation from the said first terminal soft switch.
2. coding/decoding conversion control method according to claim 1 is characterized in that, the process that said first terminal soft switch and the said second terminal soft switch are consulted comprises:
The said first terminal soft switch is sent call request message and is given the said second terminal soft switch, carries the said second code decode algorithm capability set in the said call request message;
The code decode algorithm capability set of the said second code decode algorithm capability set and himself support is mated in the said second terminal soft switch; Produce matching result; And in said matching result, confirm the code decode algorithm that use at said second terminal, and the code decode algorithm that said second terminal is used replies to the said first terminal soft switch.
3. coding/decoding conversion control method according to claim 2 is characterized in that, the step that WMG obtains the code decode algorithm that uses at said second terminal from the said first terminal soft switch comprises:
The said second terminal destination node in the said WMG receives the modification message that the said first terminal soft switch is sent, and carries the code decode algorithm that use at said second terminal in the said modification message;
The said second terminal destination node confirms that the code decode algorithm capability set of the far-end support of the said second terminal destination node is: the code decode algorithm that use at said second terminal; And the code decode algorithm capability set that the far-end that sends the said second terminal destination node is supported gives the said first terminal soft switch, and the code decode algorithm capability set of the far-end support of the said second terminal destination node is write in the data field of the said first terminal destination node.
4. coding/decoding conversion control method according to claim 3 is characterized in that, the step that said WMG obtains the code decode algorithm capability set of supporting at first terminal comprises:
The said first terminal destination node in the said WMG receives the said first terminal soft switch and sends modification message; Carry the code decode algorithm capability set of the far-end support of the said first terminal destination node in the said modification message, the code decode algorithm capability set of the far-end support of the said first terminal destination node is: the code decode algorithm capability set that said first terminal that the said first terminal soft switch is obtained from the call request message at said first terminal is supported.
5. coding/decoding conversion control method according to claim 1 is characterized in that, saidly directly the business at said first terminal, said second terminal is carried out transparent transmission; The step of perhaps business after the conversion being transmitted is specially:
Directly the business at said first terminal, said second terminal is carried out transparent transmission through medium IP interface board NIPI passage; Perhaps the business after changing is transmitted through the NIPI passage.
6. coding/decoding conversion control method according to claim 5 is characterized in that, saidly directly the business at said first terminal, said second terminal is carried out also comprising before the step of transparent transmission through medium IP interface board NIPI passage: establish timer;
Saidly directly the step that the business at said first terminal, said second terminal is carried out transparent transmission is comprised through medium IP interface board NIPI passage:
The said first terminal destination node is opened the NIPI passage, notifies the said second terminal destination node to carry out the transparent transmission of the business at said first terminal, said second terminal;
If the said second terminal destination node is opened NIPI passage success, then replys successfully to the said first terminal destination node, open the failure of NIPI passage or when overtime, fail for the said first terminal destination node answer;
The said first terminal destination node receives and replys successfully to the said first terminal soft switch when the said second terminal destination node is successfully replied, otherwise, reply failure to the said first terminal soft switch.
7. coding/decoding conversion control method according to claim 5 is characterized in that, the said step of business after changing being transmitted through the NIPI passage also comprises before:
If timer;
Utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, the step of the business after changing being transmitted through the NIPI passage comprises:
The said first terminal destination node is opened VTC passage and NIPI passage, notifies the said second terminal destination node to carry out the code decode algorithm conversion;
If the said second terminal destination node is opened the success of VTC passage and NIPI passage, then replys successfully to the said first terminal destination node, open the failure of VTC passage and NIPI passage when perhaps overtime, fail to the said first terminal destination node answer;
The said first terminal destination node receives and replys successfully to the said first terminal soft switch when the said second terminal destination node is successfully replied, otherwise, reply failure to the said first terminal soft switch.
8. according to each described coding/decoding conversion control method of claim 1-7, it is characterized in that,
After the business at said first terminal, said second terminal gets into transparent transmission; If the said first terminal destination node is received the modification message of the said first terminal soft switch; Judge that the code decode algorithm that uses at said second terminal is not in the code decode algorithm capability set that said first terminal is supported; In the time of need carrying out the code decode algorithm conversion, then the business with said first terminal destination node and the said second terminal destination node switches to the code decode algorithm conversion from transparent transmission.
9. coding/decoding conversion control method according to claim 8 is characterized in that, said business with said first terminal destination node and the said second terminal destination node comprises from the step that transparent transmission switches to the code decode algorithm conversion:
The said first terminal destination node is opened the VTC passage, revises the NIPI passage, notifies the said second terminal destination node to carry out the code decode algorithm conversion;
After the said second terminal destination node was opened the VTC passage and revised the success of NIPI passage, said first terminal destination node and the said second terminal destination node utilized the VTC passage to carry out the code decode algorithm conversion, through said NIPI passage the business after changing are transmitted.
10. coding/decoding conversion control method according to claim 9 is characterized in that, said first terminal is caller, and said second terminal is called.
11. a WMG is characterized in that, comprising:
First acquisition module is used to obtain the code decode algorithm capability set that first terminal is supported;
Second acquisition module is used to obtain the code decode algorithm that use at second terminal;
The encoding and decoding conversion control module; Be used for judging the code decode algorithm the capability set whether code decode algorithm that uses at said second terminal is supported at said first terminal; If; Then do not apply for phonetic code type converter plate VTC passage, directly the business at said first terminal, said second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted; Wherein, said second acquisition module comprises:
Receiver module; Be used to receive the context that the first terminal soft switch is sent; Said context is that the said first terminal soft switch is created according to the call request message at said first terminal; The first terminal destination node and the second terminal destination node that carry the code decode algorithm transformational marker have been added in the said context, the corresponding realtime transmission protocol RTP resource of the said first terminal destination node, the corresponding RTP resource of the said second terminal destination node;
Sending module is used for according to said code decode algorithm transformational marker, replys first code decode algorithm capability set of the said first terminal destination node support and the second code decode algorithm capability set that the said second terminal destination node is supported to the said first terminal soft switch;
Obtain submodule, be used for negotiation result, obtain the code decode algorithm that use at said second terminal from the said first terminal soft switch according to said first terminal soft switch and the said second terminal soft switch negotiation.
12. WMG according to claim 11 is characterized in that, the said submodule that obtains is specially:
The second terminal destination node module is used to receive the modification message that the said first terminal soft switch is sent, and carries the code decode algorithm that use at said second terminal in the said modification message; And the code decode algorithm capability set of confirming the far-end support of the said second terminal destination node is: the code decode algorithm that use at said second terminal; And the code decode algorithm capability set supported of the far-end that sends the said second terminal destination node; Give the said first terminal soft switch, and the code decode algorithm capability set of the far-end support of the said second terminal destination node is write in the data field of the said first terminal destination node.
13. WMG according to claim 12 is characterized in that, said first acquisition module is specially:
The first terminal destination node module; Be used to receive the said first terminal soft switch and send modification message; Carry the code decode algorithm capability set of the far-end support of the said first terminal destination node in the said modification message, the code decode algorithm capability set of the far-end support of the said first terminal destination node is: the code decode algorithm capability set that said first terminal that the said first terminal soft switch is obtained from the call request message at said first terminal is supported.
14. according to each described WMG of claim 11-13, it is characterized in that, also comprise:
Handover module; Be used for after the business at said first terminal, said second terminal gets into transparent transmission; If the said first terminal destination node is received the modification message of the said first terminal soft switch; Judge the code decode algorithm that uses at said second terminal not in the code decode algorithm capability set that said first terminal is supported, in the time of need carrying out the code decode algorithm conversion, then the business with said first terminal destination node and the said second terminal destination node switches to the code decode algorithm conversion from transparent transmission.
15. the encoding and decoding conversion control system under the soft-exchange construction is characterized in that, comprising:
The first terminal soft switch is used to obtain the code decode algorithm capability set that first terminal corresponding with the said first terminal soft switch supported;
The second terminal soft switch is used to obtain the code decode algorithm that use at second terminal corresponding with the said second terminal soft switch;
WMG; Be used for judging the code decode algorithm the capability set whether code decode algorithm that uses at said second terminal is supported at said first terminal; If, then do not apply for phonetic code type converter plate VTC passage, directly the business at said first terminal, said second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted;
Wherein, said WMG comprises:
First acquisition module is used to obtain the code decode algorithm capability set that first terminal is supported;
Second acquisition module is used to obtain the code decode algorithm that use at second terminal;
The encoding and decoding conversion control module; Be used for judging the code decode algorithm the capability set whether code decode algorithm that uses at said second terminal is supported at said first terminal; If; Then do not apply for phonetic code type converter plate VTC passage, directly the business at said first terminal, said second terminal is carried out transparent transmission; If do not exist, then apply for the VTC passage, utilize said VTC passage that the business at said first terminal, said second terminal is carried out the code decode algorithm conversion, and the business after the conversion is transmitted;
Wherein, said second acquisition module comprises:
Receiver module; Be used to receive the context that the first terminal soft switch is sent; Said context is that the said first terminal soft switch is created according to the call request message at said first terminal; The first terminal destination node and the second terminal destination node that carry the code decode algorithm transformational marker have been added in the said context, the corresponding realtime transmission protocol RTP resource of the said first terminal destination node, the corresponding RTP resource of the said second terminal destination node;
Sending module is used for according to said code decode algorithm transformational marker, replys first code decode algorithm capability set of the said first terminal destination node support and the second code decode algorithm capability set that the said second terminal destination node is supported to the said first terminal soft switch;
Obtain submodule, be used for negotiation result, obtain the code decode algorithm that use at said second terminal from the said first terminal soft switch according to said first terminal soft switch and the said second terminal soft switch negotiation.
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| CN 200910084784 CN101562667B (en) | 2009-05-19 | 2009-05-19 | Coding/decoding conversion control method, media gateway and system under soft switch architecture |
| PCT/CN2010/072746 WO2010133148A1 (en) | 2009-05-19 | 2010-05-13 | Coding/decoding conversion control method, media gateway and system under soft-switch architecture |
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| CN101562667B (en) * | 2009-05-19 | 2012-09-05 | 中兴通讯股份有限公司 | Coding/decoding conversion control method, media gateway and system under soft switch architecture |
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2010
- 2010-05-13 WO PCT/CN2010/072746 patent/WO2010133148A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052154A (en) * | 2007-05-11 | 2007-10-10 | 华为技术有限公司 | IP multimedia sub system and its coding and decoding switching control method |
| CN101141807A (en) * | 2007-08-25 | 2008-03-12 | 中兴通讯股份有限公司 | Coding/decoding negotiation method |
| CN101170792A (en) * | 2007-11-29 | 2008-04-30 | 中兴通讯股份有限公司 | A testing system for simulating a large number of call service in global mobile communication system |
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| CN101562667A (en) | 2009-10-21 |
| WO2010133148A1 (en) | 2010-11-25 |
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